libstdc++-v3/ChangeLog

   1 2021-12-10  Jakub Jelinek  <jakub@redhat.com>
   2
   3         PR libstdc++/71367
   4         * config/locale/dragonfly/time_members.cc (_M_initialize_timepunct):
   5         Initialize "C" _M_am_pm_format to %I:%M:%S %p rather than empty
   6         string.
   7         * config/locale/gnu/time_members.cc (_M_initialize_timepunct):
   8         Likewise.
   9         * config/locale/generic/time_members.cc (_M_initialize_timepunct):
  10         Likewise.
  11         * include/bits/locale_facets_nonio.h (_M_am_pm_format): New method.
  12         * include/bits/locale_facets_nonio.tcc (_M_extract_via_format): Handle
  13         %r.
  14         * config/abi/pre/gnu.ver (GLIBCXX_3.4.30): Export _M_am_pm_format
  15         with const _CharT** argument, ensure it isn't exported in GLIBCXX_3.4.
  16         * testsuite/22_locale/time_get/get/char/71367.cc: New test.
  17         * testsuite/22_locale/time_get/get/wchar_t/71367.cc: New test.
  18
  19 2021-12-10  Jakub Jelinek  <jakub@redhat.com>
  20
  21         PR libstdc++/78714
  22         * include/bits/locale_facets_nonio.tcc (_M_extract_via_format):
  23         Mention in function comment it interprets strptime format string
  24         rather than strftime.  Handle %a and %A the same by accepting both
  25         full and abbreviated names.  Similarly handle %h, %b and %B the same.
  26         Handle %d and %e the same by accepting possibly optional single space
  27         and 1 or 2 digits.  For %I store tm_hour 0 instead of tm_hour 12.  For
  28         %t and %n skip any whitespace.  Handle %p and %%.  For whitespace in
  29         the string skip any whitespace.
  30         (_M_extract_num): For __len == 2 accept 1 or 2 digits rather than
  31         always 2.  Don't punt early if __value * __mult is larget than __max
  32         or smaller than __min - __mult, instead punt if __value > __max.
  33         At the end verify __value is in between __min and __max and punt
  34         otherwise.
  35         (_M_extract_name): Allow non-unique names or names which are prefixes
  36         of other names.  Don't recompute lengths of names for every character.
  37         * testsuite/22_locale/time_get/get/char/3.cc: New test.
  38         * testsuite/22_locale/time_get/get/wchar_t/3.cc: New test.
  39         * testsuite/22_locale/time_get/get_date/char/12791.cc (test01): Use
  40         62 instead 60 and expect 6 to be accepted and thus *ret01 == '2'.
  41         * testsuite/22_locale/time_get/get_date/wchar_t/12791.cc (test01):
  42         Similarly.
  43         * testsuite/22_locale/time_get/get_time/char/2.cc (test02): Add " PM"
  44         to the string.
  45         * testsuite/22_locale/time_get/get_time/char/5.cc (test01): Expect
  46         tm_hour 1 rather than 0.
  47         * testsuite/22_locale/time_get/get_time/wchar_t/2.cc (test02): Add
  48         " PM" to the string.
  49         * testsuite/22_locale/time_get/get_time/wchar_t/5.cc (test01): Expect
  50         tm_hour 1 rather than 0.
  51
  52 2021-12-10  Jonathan Wakely  <jwakely@redhat.com>
  53
  54         PR libstdc++/103638
  55         * include/bits/atomic_timed_wait.h: Check _GLIBCXX_HAS_GTHREADS
  56         before using std::mutex and std::__condvar.
  57
  58 2021-12-10  Jonathan Wakely  <jwakely@redhat.com>
  59
  60         * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Add _GLIBCXX_
  61         prefix to NO_SLEEP macro.
  62         * config.h.in: Regenerate.
  63         * configure: Regenerate.
  64
  65 2021-12-10  Jonathan Wakely  <jwakely@redhat.com>
  66
  67         * include/bits/char_traits.h: Change pragma push to pop.
  68
  69 2021-12-10  Thomas Rodgers  <rodgert@twrodgers.com>
  70
  71         PR libstdc++/102994
  72         * include/bits/atomic_base.h (__atomic_base<_PTp*>::wait()):
  73         Add const qualifier.
  74         * include/std/atomic (atomic<_Tp*>::wait(), atomic_wait()):
  75         Likewise.
  76         * testsuite/29_atomics/atomic/wait_notify/102994.cc:
  77         New test.
  78
  79 2021-12-09  Jonathan Wakely  <jwakely@redhat.com>
  80
  81         * include/bits/stl_iterator.h (operator==, operator<=>): Define
  82         overloads for homogeneous specializations of reverse_iterator,
  83         __normal_iterator and move_iterator.
  84
  85 2021-12-09  Jonathan Wakely  <jwakely@redhat.com>
  86
  87         * testsuite/20_util/scoped_allocator/69293_neg.cc: Remove
  88         dg-error for c++20.
  89
  90 2021-12-09  Jonathan Wakely  <jwakely@redhat.com>
  91
  92         PR libstdc++/85813
  93         * libsupc++/exception_ptr.h (__dest_thunk): Add macro for
  94         destructor calling convention.
  95         (make_exception_ptr): Enable non-throwing implementation for
  96         -fno-exceptions and for non-standard calling conventions. Use
  97         always_inline attribute on the useless no-rtti no-exceptions
  98         definition.
  99         * testsuite/18_support/exception_ptr/64241.cc: Add -fno-rtti so
 100         the no-op implementation is still used.
 101
 102 2021-12-09  Jonathan Wakely  <jwakely@redhat.com>
 103
 104         PR libstdc++/103630
 105         * libsupc++/exception_ptr.h (exception_ptr): Fix exception
 106         specifications on inline definitions.
 107         (make_exception_ptr): Decay the template parameter. Use typeid
 108         of the static type.
 109         * testsuite/18_support/exception_ptr/103630.cc: New test.
 110
 111 2021-12-09  Jonathan Wakely  <jwakely@redhat.com>
 112
 113         PR libstdc++/59769
 114         * config/io/basic_file_stdio.cc (fopen_mode): Add support for
 115         exclusive mode.
 116         * include/bits/ios_base.h (_S_noreplace): Define new enumerator.
 117         (ios_base::__noreplace): Define.
 118         (ios_base::noreplace): Define for C++23.
 119         * include/std/version (__cpp_lib_ios_noreplace): Define.
 120         * testsuite/27_io/basic_ofstream/open/char/noreplace.cc: New test.
 121         * testsuite/27_io/basic_ofstream/open/wchar_t/noreplace.cc: New test.
 122
 123 2021-12-09  Jonathan Wakely  <jwakely@redhat.com>
 124
 125         PR libstdc++/103382
 126         * config/abi/pre/gnu.ver (GLIBCXX_3.4.11): Do not export old
 127         symbol if .symver renaming is supported.
 128         (GLIBCXX_3.4.30): Export new symbol if .symver renaming is
 129         supported.
 130         * doc/xml/manual/evolution.xml: Document change.
 131         * doc/html/manual/api.html: Regenerate.
 132         * include/bits/std_mutex.h (__condvar::wait, __condvar::wait_until):
 133         Remove noexcept.
 134         * include/std/condition_variable (condition_variable::wait):
 135         Likewise.
 136         * src/c++11/condition_variable.cc (condition_variable::wait):
 137         Likewise.
 138         * src/c++11/compatibility-condvar.cc (__nothrow_wait_cv::wait):
 139         Define nothrow wrapper around std::condition_variable::wait and
 140         export the old symbol as an alias to it.
 141         * testsuite/30_threads/condition_variable/members/103382.cc: New test.
 142
 143 2021-12-09  Jonathan Wakely  <jwakely@redhat.com>
 144
 145         PR libstdc++/92300
 146         * include/bits/stl_map.h (insert(Pair&&), emplace(Args&&...)):
 147         Check whether the arguments can be looked up directly without
 148         constructing a temporary node first.
 149         * include/bits/stl_pair.h (__is_pair): Move to here, from ...
 150         * include/bits/uses_allocator_args.h (__is_pair): ... here.
 151         * testsuite/23_containers/map/modifiers/emplace/92300.cc: New test.
 152         * testsuite/23_containers/map/modifiers/insert/92300.cc: New test.
 153
 154 2021-12-09  Jonathan Wakely  <jwakely@redhat.com>
 155
 156         * include/bits/cow_string.h (basic_string::_M_leak_hard): Do not
 157         reallocate an empty string.
 158
 159 2021-12-09  Jonathan Wakely  <jwakely@redhat.com>
 160
 161         PR libstdc++/103332
 162         PR libstdc++/102958
 163         PR libstdc++/103483
 164         * include/bits/char_traits.h: Suppress stringop and array-bounds
 165         warnings.
 166
 167 2021-12-09  Jonathan Wakely  <jwakely@redhat.com>
 168
 169         PR libstdc++/64135
 170         * config/allocator/new_allocator_base.h: Include
 171         <bits/new_allocator.h> instead of <ext/new_allocator.h>.
 172         (__allocator_base): Use std::__new_allocator instead of
 173         __gnu_cxx::new_allocator.
 174         * doc/xml/manual/allocator.xml: Document new default base class
 175         for std::allocator.
 176         * doc/xml/manual/evolution.xml: Likewise.
 177         * doc/html/*: Regenerate.
 178         * include/Makefile.am: Add bits/new_allocator.h.
 179         * include/Makefile.in: Regenerate.
 180         * include/experimental/memory_resource (new_delete_resource):
 181         Use std::__new_allocator instead of __gnu_cxx::new_allocator.
 182         * include/ext/new_allocator.h (new_allocator): Derive from
 183         std::__new_allocator. Move implementation to ...
 184         * include/bits/new_allocator.h: New file.
 185         * testsuite/20_util/allocator/64135.cc: New test.
 186
 187 2021-12-08  Jonathan Wakely  <jwakely@redhat.com>
 188
 189         * include/bits/shared_ptr_base.h (_Sp_counted_base::_M_release()):
 190         Make shift width conditional on __double_word condition.
 191
 192 2021-12-08  François Dumont  <fdumont@gcc.gnu.org>
 193
 194         * include/std/deque (erase_if): Use _GLIBCXX_STD_C container reference and
 195         __niter_wrap to limit _GLIBCXX_DEBUG mode impact.
 196         * include/std/vector (erase_if): Likewise.
 197
 198 2021-12-08  Maged Michael  <maged.michael@gmail.com>
 199             Jonathan Wakely  <jwakely@redhat.com>
 200
 201         * include/bits/c++config (_GLIBCXX_TSAN): Define macro
 202         indicating that TSan is in use.
 203         * include/bits/shared_ptr_base.h (_Sp_counted_base::_M_release):
 204         Replace definition in primary template with explicit
 205         specializations for _S_mutex and _S_atomic policies.
 206         (_Sp_counted_base<_S_mutex>::_M_release): New specialization.
 207         (_Sp_counted_base<_S_atomic>::_M_release): New specialization,
 208         using a single atomic load to access both reference counts at
 209         once.
 210         (_Sp_counted_base::_M_release_last_use): New member function.
 211
 212 2021-12-07  Tamar Christina  <tamar.christina@arm.com>
 213
 214         Revert:
 215         2021-11-19  Tamar Christina  <tamar.christina@arm.com>
 216
 217         PR libstdc++/103305
 218         * config/os/newlib/ctype_base.h (upper, lower, alpha, digit, xdigit,
 219         space, print, graph, cntrl, punct, alnum, blank): Use short or long
 220         names depending on if short ones are defined.
 221
 222 2021-12-04  Jonathan Wakely  <jwakely@redhat.com>
 223
 224         PR libstdc++/103549
 225         * include/bits/regex.h (match_results): Give names to template
 226         parameters in first declaration.
 227         (match_results::_M_begin): Add default member-initializer.
 228
 229 2021-12-03  Jonathan Wakely  <jwakely@redhat.com>
 230
 231         * include/bits/stl_tree.h (_Rb_tree::_Auto_node): Define new
 232         RAII helper for creating and inserting new nodes.
 233         (_Rb_tree::_M_insert_node): Use trailing-return-type to simplify
 234         out-of-line definition.
 235         (_Rb_tree::_M_insert_lower_node): Likewise.
 236         (_Rb_tree::_M_insert_equal_lower_node): Likewise.
 237         (_Rb_tree::_M_emplace_unique): Likewise. Use _Auto_node.
 238         (_Rb_tree::_M_emplace_equal): Likewise.
 239         (_Rb_tree::_M_emplace_hint_unique): Likewise.
 240         (_Rb_tree::_M_emplace_hint_equal): Likewise.
 241
 242 2021-12-02  Jonathan Wakely  <jwakely@redhat.com>
 243
 244         * src/c++11/cow-stdexcept.cc [_GLIBCXX_FULLY_DYNAMIC_STRING]
 245         (logic_error, runtime_error): Remove custom definitions.
 246
 247 2021-12-02  Jonathan Wakely  <jwakely@redhat.com>
 248
 249         PR libstdc++/103340
 250         PR libstdc++/103400
 251         PR libstdc++/103381
 252         * acinclude.m4 (GLIBCXX_ENABLE_ALLOCATOR): Remove mt, bitmap
 253         and pool options.
 254         * configure: Regenerate.
 255         * config/allocator/bitmap_allocator_base.h: Removed.
 256         * config/allocator/mt_allocator_base.h: Removed.
 257         * config/allocator/pool_allocator_base.h: Removed.
 258         * doc/xml/manual/allocator.xml: Update.
 259         * doc/xml/manual/configure.xml: Update.
 260         * doc/xml/manual/evolution.xml: Document removal.
 261         * doc/xml/manual/mt_allocator.xml: Editorial tweaks.
 262         * doc/html/manual/*: Regenerate.
 263
 264 2021-12-02  Jonathan Wakely  <jwakely@redhat.com>
 265
 266         * include/bits/cow_string.h (basic_string::_M_is_leaked()):
 267         Revert change to check __is_single_threaded() before using
 268         atomic load.
 269
 270 2021-12-01  Jonathan Wakely  <jwakely@redhat.com>
 271
 272         PR libstdc++/103501
 273         * include/bits/stl_tree.h (_Rb_tree(_Rb_tree&&, false_type)):
 274         Clear container if elements have been moved-from.
 275         * testsuite/23_containers/map/allocator/move_cons.cc: Expect
 276         moved-from container to be empty.
 277         * testsuite/23_containers/multimap/allocator/move_cons.cc:
 278         Likewise.
 279         * testsuite/23_containers/multiset/allocator/103501.cc: New test.
 280         * testsuite/23_containers/set/allocator/103501.cc: New test.
 281
 282 2021-12-01  Jonathan Wakely  <jwakely@redhat.com>
 283
 284         * doc/doxygen/user.cfg.in (PREDEFINED): Change macro name.
 285         * include/bits/allocator.h (allocate, deallocate): Use
 286         std::__is_constant_evaluated() unconditionally, instead of
 287         checking whether std::is_constant_evaluated() (or the built-in)
 288         can be used.
 289         * include/bits/basic_string.h: Check new macro. call
 290         std::is_constant_evaluated() directly in C++20-only code that is
 291         guarded by a suitable macro.
 292         * include/bits/basic_string.tcc: Likewise.
 293         * include/bits/c++config (__is_constant_evaluated): Define.
 294         (_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED): Replace with ...
 295         (_GLIBCXX_HAVE_IS_CONSTANT_EVALUATED): New macro.
 296         * include/bits/char_traits.h (char_traits): Replace conditional
 297         calls to std::is_constant_evaluated with unconditional calls to
 298         std::__is_constant_evaluated.
 299         * include/bits/cow_string.h: Use new macro.
 300         * include/bits/ranges_algobase.h (__copy_or_move): Replace
 301         conditional calls to std::is_constant_evaluated with unconditional
 302         calls to std::__is_constant_evaluated.
 303         (__copy_or_move_backward, __fill_n_fn): Likewise.
 304         * include/bits/ranges_cmp.h (ranges::less): Likewise.
 305         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
 306         Likewise.
 307         * include/bits/stl_bvector.h: Call std::is_constant_evaluated
 308         directly in C++20-only code that is guarded by a suitable macro.
 309         * include/bits/stl_construct.h (_Construct, _Destroy, _Destroy_n):
 310         Replace is_constant_evaluated with __is_constant_evaluated.
 311         * include/bits/stl_function.h (greater, less, greater_equal)
 312         (less_equal): Replace __builtin_is_constant_evaluated and
 313         __builtin_constant_p with __is_constant_evaluated.
 314         * include/bits/stl_vector.h: Call std::is_constant_evaluated()
 315         in C++20-only code.
 316         * include/debug/helper_functions.h (__check_singular): Use
 317         __is_constant_evaluated instead of built-in, or remove check
 318         entirely.
 319         * include/std/array (operator<=>): Use __is_constant_evaluated
 320         unconditionally.
 321         * include/std/bit (__bit_ceil): Likewise.
 322         * include/std/type_traits (is_constant_evaluated): Define using
 323         'if consteval' if possible.
 324         * include/std/version: Use new macro.
 325         * libsupc++/compare: Use __is_constant_evaluated instead of
 326         __builtin_is_constant_evaluated.
 327         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
 328         Adjust dg-error lines.
 329
 330 2021-12-01  Jonathan Wakely  <jwakely@redhat.com>
 331
 332         * include/bits/cow_string.h (basic_string::_M_is_leaked): Use
 333         non-atomic load when __is_single_threaded() is true.
 334         (basic_string::_M_is_shared): Likewise.
 335         (basic_string::(basic_string&&)) [_GLIBCXX_FULLY_DYNAMIC_STRING]:
 336         Use non-atomic store when rvalue is not shared.
 337
 338 2021-12-01  Jonathan Wakely  <jwakely@redhat.com>
 339
 340         * src/c++17/fs_path.cc (path::_M_split_cmpts()): Remove
 341         micro-optimization for "/" path.
 342         * src/filesystem/path.cc (path::_M_split_cmpts()): Only access
 343         the contents of _M_pathname using const member functions.
 344
 345 2021-11-30  Jonathan Wakely  <jwakely@redhat.com>
 346
 347         * testsuite/21_strings/basic_string/cons/char/moveable.cc: Allow
 348         moved-from string to be non-empty.
 349         * testsuite/21_strings/basic_string/cons/char/moveable2.cc:
 350         Likewise.
 351         * testsuite/21_strings/basic_string/cons/char/moveable2_c++17.cc:
 352         Likewise.
 353         * testsuite/21_strings/basic_string/cons/wchar_t/moveable.cc:
 354         Likewise.
 355         * testsuite/21_strings/basic_string/cons/wchar_t/moveable2.cc:
 356         Likewise.
 357         * testsuite/21_strings/basic_string/cons/wchar_t/moveable2_c++17.cc:
 358         Likewise.
 359         * testsuite/21_strings/basic_string/modifiers/assign/char/87749.cc:
 360         Construct empty string before setting oom flag.
 361         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/87749.cc:
 362         Likewise.
 363
 364 2021-11-30  Jonathan Wakely  <jwakely@redhat.com>
 365
 366         * include/bits/cow_string.h (basic_string(basic_string&&)): Fix
 367         mem-initializer for _GLIBCXX_FULLY_DYNAMIC_STRING==0 case.
 368         * testsuite/21_strings/basic_string/cons/char/noexcept_move_construct.cc:
 369         Remove outdated comment.
 370         * testsuite/21_strings/basic_string/cons/wchar_t/noexcept_move_construct.cc:
 371         Likewise.
 372
 373 2021-11-30  Jonathan Wakely  <jwakely@redhat.com>
 374
 375         * src/c++20/sstream-inst.cc (_GLIBCXX_USE_CXX11_ABI): Define to
 376         select new ABI.
 377
 378 2021-11-30  Jonathan Wakely  <jwakely@redhat.com>
 379
 380         * include/bits/stl_vector.h (vector::_S_do_relocate): Remove
 381         C++20 constexpr specifier.
 382         (vector::_S_relocate) [__cpp_if_constexpr]: Call __relocate_a
 383         directly without tag dispatching.
 384
 385 2021-11-30  Jonathan Wakely  <jwakely@redhat.com>
 386
 387         PR libstdc++/103453
 388         * config/allocator/malloc_allocator_base.h
 389         (_GLIBCXX_SANITIZE_STD_ALLOCATOR): Define for Clang.
 390         * config/allocator/new_allocator_base.h
 391         (_GLIBCXX_SANITIZE_STD_ALLOCATOR): Likewise.
 392
 393 2021-11-30  Jonathan Wakely  <jwakely@redhat.com>
 394
 395         * doc/xml/manual/debug_mode.xml: Replace "his or her" with "their".
 396         * doc/html/manual/debug_mode_design.html: Regenerate.
 397
 398 2021-11-30  Jakub Jelinek  <jakub@redhat.com>
 399
 400         * include/std/bit (byteswap): Add [[nodiscard]].
 401
 402 2021-11-28  Jakub Jelinek  <jakub@redhat.com>
 403
 404         * include/std/bit (__cpp_lib_byteswap, byteswap): Define.
 405         * include/std/version (__cpp_lib_byteswap): Define.
 406         * testsuite/26_numerics/bit/bit.byteswap/byteswap.cc: New test.
 407         * testsuite/26_numerics/bit/bit.byteswap/version.cc: New test.
 408
 409 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
 410
 411         * testsuite/24_iterators/move_iterator/dr3265.cc: Fix test to
 412         account for LWG 3435 resolution.
 413
 414 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
 415
 416         * include/bits/stl_uninitialized.h (__relocate_a_1): Do not use
 417         memmove during constant evaluation.
 418         * include/bits/stl_vector.h (vector::_S_use_relocate()): Do not
 419         check is_constant_evaluated in always-constexpr function.
 420
 421 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
 422
 423         PR libstdc++/96592
 424         * include/std/tuple (tuple::is_constructible): Remove.
 425
 426 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
 427
 428         * testsuite/29_atomics/atomic_float/1.cc: Reorder directives.
 429
 430 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
 431
 432         * testsuite/23_containers/unordered_map/modifiers/move_assign.cc:
 433         Change dg-do compile to run.
 434         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499.cc:
 435         Likewise.
 436
 437 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
 438
 439         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
 440         Remove xfail selector.
 441         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
 442         Likewise.
 443         Likewise.
 444         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
 445         Likewise.
 446         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
 447         Likewise.
 448         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
 449         Likewise.
 450         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
 451         Likewise.
 452         * testsuite/23_containers/span/101411.cc: Likewise.
 453         * testsuite/25_algorithms/copy/debug/constexpr_neg.cc: Likewise.
 454         * testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc:
 455         Likewise.
 456         * testsuite/25_algorithms/equal/constexpr_neg.cc: Likewise.
 457         * testsuite/25_algorithms/equal/debug/constexpr_neg.cc: Likewise.
 458         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc:
 459         Likewise.
 460         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc:
 461         Likewise.
 462         * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc:
 463         Likewise.
 464         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc:
 465         Likewise.
 466         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc:
 467         Likewise.
 468         * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc:
 469         Likewise.
 470
 471 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
 472
 473         * testsuite/20_util/pointer_traits/lwg3545.cc: Move to_address
 474         tests to ...
 475         * testsuite/20_util/to_address/lwg3545.cc: ... here. Add -std
 476         option before checking effective target.
 477
 478 2021-11-25  Jonathan Wakely  <jwakely@redhat.com>
 479
 480         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
 481         Remove dg-error for C++11_only error.
 482
 483 2021-11-25  Jonathan Wakely  <jwakely@redhat.com>
 484
 485         PR libstdc++/96416
 486         * include/bits/ptr_traits.h (pointer_traits): Reimplement to be
 487         SFINAE-friendly (LWG 3545).
 488         * testsuite/20_util/pointer_traits/lwg3545.cc: New test.
 489         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line.
 490         * testsuite/20_util/to_address/lwg3545.cc: New test.
 491
 492 2021-11-25  Jonathan Wakely  <jwakely@redhat.com>
 493
 494         PR libstdc++/101608
 495         * include/bits/ranges_algobase.h (__fill_n_fn): Check for
 496         constant evaluation before using memset.
 497         * testsuite/25_algorithms/fill_n/constrained.cc: Check
 498         byte-sized values as well.
 499
 500 2021-11-24  Jonathan Wakely  <jwakely@redhat.com>
 501
 502         * testsuite/libstdc++-prettyprinters/80276.cc: Add xfail for
 503         debug mode.
 504         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
 505
 506 2021-11-24  Jonathan Wakely  <jwakely@redhat.com>
 507
 508         * testsuite/lib/libstdc++.exp: Rename effective target keywords
 509         to avoid dashes in the name.
 510         * testsuite/*: Update effective targe keywords.
 511
 512 2021-11-23  Jonathan Wakely  <jwakely@redhat.com>
 513
 514         PR libstdc++/103086
 515         * testsuite/libstdc++-prettyprinters/cxx11.cc: Check unique_ptr
 516         with non-empty pointer and non-empty deleter.
 517
 518 2021-11-23  Jonathan Wakely  <jwakely@redhat.com>
 519
 520         * testsuite/18_support/50594.cc: Check effective target.
 521         * testsuite/20_util/allocator/1.cc: Likewise.
 522         * testsuite/20_util/allocator/overaligned.cc: Likewise.
 523         * testsuite/23_containers/unordered_map/96088.cc: Likewise.
 524         * testsuite/23_containers/unordered_multimap/96088.cc: Likewise.
 525         * testsuite/23_containers/unordered_multiset/96088.cc: Likewise.
 526         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
 527         * testsuite/ext/throw_allocator/check_delete.cc: Likewise.
 528         * testsuite/ext/throw_allocator/check_new.cc: Likewise.
 529         * testsuite/lib/libstdc++.exp (check_effective_target_std_allocator_new):
 530         Define new proc.
 531
 532 2021-11-23  Jonathan Wakely  <jwakely@redhat.com>
 533
 534         PR libstdc++/103381
 535         * include/ext/bitmap_allocator.h: Include <bits/stl_function.h>
 536         instead of <functional>.
 537
 538 2021-11-22  Jonathan Wakely  <jwakely@redhat.com>
 539
 540         * include/bits/c++config (_GLIBCXX14_DEPRECATED): Fix condition
 541         checking for C++14.
 542
 543 2021-11-20  François Dumont  <fdumont@gcc.gnu.org>
 544
 545         * include/bits/erase_if.h (__erase_nodes_if): Add _UnsafeContainer template
 546         parameter. Use it to get iterators to work with.
 547         * include/debug/macros.h (__glibcxx_check_erase2): New.
 548         * include/debug/map.h (map<>::erase(_Base_const_iterator)): New.
 549         (map<>::erase(const_iterator)): Use latter.
 550         * include/debug/multimap.h (multimap<>::erase(_Base_const_iterator)): New.
 551         (multimap<>::erase(const_iterator)): Use latter.
 552         * include/debug/multiset.h (multiset<>::erase(_Base_const_iterator)): New.
 553         (multiset<>::erase(const_iterator)): Use latter.
 554         * include/debug/set.h (set<>::erase(_Base_const_iterator)): New.
 555         (set<>::erase(const_iterator)): Use latter.
 556         * include/debug/unordered_map (unordered_map<>::erase(_Base_const_iterator)): New.
 557         (unordered_multimap<>::erase(const_iterator)): New.
 558         * include/debug/unordered_set (unordered_set<>::erase(_Base_const_iterator)): New.
 559         (unordered_multiset<>::erase(const_iterator)): New.
 560         * include/experimental/map (erase_if): Adapt.
 561         * include/experimental/set (erase_if): Adapt.
 562         * include/experimental/unordered_map (erase_if): Adapt.
 563         * include/experimental/unordered_set (erase_if): Adapt.
 564         * include/std/map (erase_if): Adapt.
 565         * include/std/set (erase_if): Adapt.
 566         * include/std/unordered_map (erase_if): Adapt.
 567         * include/std/unordered_set (erase_if): Adapt.
 568
 569 2021-11-19  Jonathan Wakely  <jwakely@redhat.com>
 570
 571         * testsuite/27_io/basic_istringstream/cons/char/1.cc: Check all
 572         constructors.
 573         * testsuite/27_io/basic_istringstream/cons/wchar_t/1.cc:
 574         Likewise.
 575         * testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
 576         * testsuite/27_io/basic_ostringstream/cons/wchar_t/1.cc:
 577         Likewise.
 578         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.
 579         * testsuite/27_io/basic_stringstream/cons/wchar_t/1.cc:
 580         Likewise.
 581
 582 2021-11-19  Jonathan Wakely  <jwakely@redhat.com>
 583
 584         * src/c++98/locale_init.cc (_S_initialize_once): Check if
 585         initialization has already been done.
 586         (_S_initialize): Replace __gthread_active_p with
 587         __is_single_threaded. Use __builtin_expect.
 588
 589 2021-11-19  Jonathan Wakely  <jwakely@redhat.com>
 590
 591         PR libstdc++/103295
 592         * include/bits/basic_string.tcc (_M_construct): Use the
 593         traits assign member to write into allcoated memory.
 594
 595 2021-11-19  Iain Sandoe  <iain@sandoe.co.uk>
 596
 597         * testsuite/lib/prune.exp: Prune dsymutil (ld64) warning.
 598
 599 2021-11-19  Jonathan Wakely  <jwakely@redhat.com>
 600
 601         PR libstdc++/103332
 602         PR libstdc++/102958
 603         * testsuite/21_strings/basic_string/capacity/char/1.cc: Add
 604         -Wno-stringop-overflow.
 605         * testsuite/21_strings/basic_string/operators/char/1.cc:
 606         Likewise.
 607         * testsuite/experimental/filesystem/path/factory/u8path-char8_t.cc:
 608         Add -Wno-stringop-overread.
 609
 610 2021-11-19  Jonathan Wakely  <jwakely@redhat.com>
 611
 612         PR libstdc++/103295
 613         * include/bits/basic_string.h (_Alloc_traits): Replace typedef
 614         with struct for C++20 mode.
 615         * include/bits/basic_string.tcc (_M_replace): Use _Alloc_traits
 616         for allocation.
 617         * include/bits/char_traits.h (__gnu_cxx::char_traits::assign):
 618         Use std::_Construct during constant evaluation.
 619         (__gnu_cxx::char_traits::assign(CharT*, const CharT*, size_t)):
 620         Likewise. Replace std::fill_n with memset or manual loop.
 621         (__gnu_cxx::char_traits::copy): Likewise, replacing std::copy
 622         with memcpy.
 623         * include/ext/vstring.h: Include <bits/stl_algobase.h> for
 624         std::min.
 625         * include/std/string_view: Likewise.
 626         * testsuite/21_strings/basic_string/capacity/char/resize_and_overwrite.cc:
 627         Add constexpr test.
 628
 629 2021-11-19  Tamar Christina  <tamar.christina@arm.com>
 630
 631         PR libstdc++/103305
 632         * config/os/newlib/ctype_base.h (upper, lower, alpha, digit, xdigit,
 633         space, print, graph, cntrl, punct, alnum, blank): Use short or long
 634         names depending on if short ones are defined.
 635
 636 2021-11-18  Jonathan Wakely  <jwakely@redhat.com>
 637
 638         * include/bits/char_traits.h (__gnu_cxx::char_traits::move):
 639         Do not compare unrelated pointers during constant evaluation.
 640         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
 641         Improve tests for char_traits::move.
 642
 643 2021-11-18  Jonathan Wakely  <jwakely@redhat.com>
 644
 645         * acinclude.m4: Replace AC_CACHE_VAL with AC_CACHE_CHECK.
 646         * configure: Regenerate.
 647
 648 2021-11-17  Jonathan Wakely  <jwakely@redhat.com>
 649
 650         * include/experimental/internet (address): Use std::_Construct
 651         to initialize union members.
 652
 653 2021-11-17  Jonathan Wakely  <jwakely@redhat.com>
 654
 655         * include/bits/basic_string.h (_M_construct_aux): Only define
 656         for C++98. Remove constexpr.
 657         (_M_construct_aux_2): Likewise.
 658         (_M_construct(InputIter, InputIter)): Remove.
 659         (basic_string(const basic_string&)): Call _M_construct with
 660         iterator category argument.
 661         (basic_string(const basic_string&, size_type, const Alloc&)):
 662         Likewise.
 663         (basic_string(const basic_string&, size_type, size_type)):
 664         Likewise.
 665         (basic_string(const charT*, size_type, const Alloc&)): Likewise.
 666         Check for null pointer.
 667         (basic_string(const charT*, const Alloc&)): Likewise.
 668         (basic_string(initializer_list<charT>, const Alloc&)): Call
 669         _M_construct with iterator category argument.
 670         (basic_string(const basic_string&, const Alloc&)): Likewise.
 671         (basic_string(basic_string&&, const Alloc&)): Likewise.
 672         (basic_string(_InputIter, _InputIter, const Alloc&)): Likewise
 673         for C++11 and later, call _M_construct_aux for C++98.
 674         * include/bits/basic_string.tcc
 675         (_M_construct(I, I, input_iterator_tag)): Replace try-block with
 676         RAII type.
 677         (_M_construct(I, I, forward_iterator_tag)): Likewise. Remove
 678         __is_null_pointer check.
 679
 680 2021-11-17  Jonathan Wakely  <jwakely@redhat.com>
 681
 682         PR libstdc++/103295
 683         * include/bits/basic_string.h (_M_use_local_data()): New
 684         member function to make local buffer the active member.
 685         (assign(const basic_string&)): Use it.
 686         * include/bits/basic_string.tcc (_M_construct, reserve()):
 687         Likewise.
 688
 689 2021-11-17  Jonathan Wakely  <jwakely@redhat.com>
 690
 691         PR libstdc++/103240
 692         * libsupc++/tinfo2.cc (type_info::before): Use unadjusted name
 693         to check for the '*' prefix.
 694         * testsuite/util/testsuite_shared.cc: Add type_info object for
 695         use in new test.
 696         * testsuite/18_support/type_info/103240.cc: New test.
 697
 698 2021-11-16  Jonathan Wakely  <jwakely@redhat.com>
 699
 700         * include/bits/basic_string.h (operator<=>): Use constexpr
 701         unconditionally.
 702         * testsuite/21_strings/basic_string/modifiers/constexpr.cc:
 703         Require cxx11-abit effective target.
 704         * testsuite/21_strings/headers/string/synopsis.cc: Add
 705         conditional constexpr to declarations, and adjust relational
 706         operators for C++20.
 707
 708 2021-11-16  Patrick Palka  <ppalka@redhat.com>
 709
 710         * src/c++17/ryu/MERGE: Update the commit hash.
 711         * src/c++17/ryu/d2s_intrinsics.h: Merge from Ryu's master
 712         branch.
 713
 714 2021-11-16  Jonathan Wakely  <jwakely@redhat.com>
 715
 716         * include/bits/basic_string.h (basic_string, operator""s): Add
 717         constexpr for C++20.
 718         (basic_string::basic_string(basic_string&&)): Only copy
 719         initialized portion of the buffer.
 720         (basic_string::basic_string(basic_string&&, const Alloc&)):
 721         Likewise.
 722         * include/bits/basic_string.tcc (basic_string): Add constexpr
 723         for C++20.
 724         (basic_string::swap(basic_string&)): Only copy initialized
 725         portions of the buffers.
 726         (basic_string::_M_replace): Add constexpr implementation that
 727         doesn't depend on pointer comparisons.
 728         * include/bits/cow_string.h: Adjust comment.
 729         * include/ext/type_traits.h (__is_null_pointer): Add constexpr.
 730         * include/std/string (erase, erase_if): Add constexpr.
 731         * include/std/version (__cpp_lib_constexpr_string): Update
 732         value.
 733         * testsuite/21_strings/basic_string/cons/char/constexpr.cc:
 734         New test.
 735         * testsuite/21_strings/basic_string/cons/wchar_t/constexpr.cc:
 736         New test.
 737         * testsuite/21_strings/basic_string/literals/constexpr.cc:
 738         New test.
 739         * testsuite/21_strings/basic_string/modifiers/constexpr.cc: New test.
 740         * testsuite/21_strings/basic_string/modifiers/swap/char/constexpr.cc:
 741         New test.
 742         * testsuite/21_strings/basic_string/modifiers/swap/wchar_t/constexpr.cc:
 743         New test.
 744         * testsuite/21_strings/basic_string/version.cc: New test.
 745
 746 2021-11-16  Jonathan Wakely  <jwakely@redhat.com>
 747
 748         * include/bits/stl_bvector.h (swap(_Bit_reference, _Bit_reference))
 749         (swap(_Bit_reference, bool&), swap(bool&, _Bit_reference)):
 750         Define as hidden friends of _Bit_reference.
 751
 752 2021-11-16  Jonathan Wakely  <jwakely@redhat.com>
 753
 754         * testsuite/21_strings/basic_string/modifiers/append/wchar_t/1.cc:
 755         Fix reads past the end of strings.
 756         * testsuite/21_strings/basic_string/operations/compare/wchar_t/1.cc:
 757         Likewise.
 758         * testsuite/experimental/string_view/operations/compare/wchar_t/1.cc:
 759         Likewise.
 760
 761 2021-11-16  Jonathan Wakely  <jwakely@redhat.com>
 762
 763         * testsuite/21_strings/basic_string/allocator/71964.cc: Fix
 764         typo.
 765         * testsuite/23_containers/set/allocator/71964.cc: Likewise.
 766
 767 2021-11-15  Jason Merrill  <jason@redhat.com>
 768
 769         * testsuite/20_util/to_address/1_neg.cc: Adjust error.
 770         * testsuite/26_numerics/random/concept.cc: Adjust asserts.
 771
 772 2021-11-15  François Dumont  <fdumont@gcc.gnu.org>
 773
 774         * include/bits/hashtable_policy.h:
 775         (_Hash_code_base<>::_M_hash_code(const _Hash&, const _Hash_node_value<_Value, true>&)): New.
 776         (_Hash_code_base<>::_M_hash_code<_H2>(const _H2&, const _Hash_node_value<>&)): New.
 777         * include/bits/hashtable.h (_Hashtable<>::_M_merge_unique): Use latter.
 778         (_Hashtable<>::_M_merge_multi): Likewise.
 779         * testsuite/23_containers/unordered_multiset/modifiers/merge.cc (test05): New test.
 780         * testsuite/23_containers/unordered_set/modifiers/merge.cc (test04): New test.
 781
 782 2021-11-15  Jason Merrill  <jason@redhat.com>
 783
 784         * src/c++17/memory_resource.cc: Add missing constexpr.
 785         * include/experimental/internet: Only mark copy constructor
 786         as constexpr with __cpp_constexpr_dynamic_alloc.
 787
 788 2021-11-14  François Dumont  <fdumont@gcc.gnu.org>
 789
 790         * include/debug/safe_container.h (_Safe_container<>::_M_safe): Remove.
 791         * include/debug/deque (deque::operator=(initializer_list<>)): Replace
 792         _M_base() call with _Base:: call.
 793         (deque::operator[](size_type)): Likewise.
 794         * include/debug/forward_list (forward_list(forward_list&&, const allocator_type&)):
 795         Remove _M_safe() and _M_base() calls.
 796         (forward_list::operator=(initializer_list<>)): Remove _M_base() calls.
 797         (forward_list::splice_after, forward_list::merge): Likewise.
 798         * include/debug/list (list(list&&, const allocator_type&)):
 799         Remove _M_safe() and _M_base() calls.
 800         (list::operator=(initializer_list<>)): Remove _M_base() calls.
 801         (list::splice, list::merge): Likewise.
 802         * include/debug/map.h (map(map&&, const allocator_type&)):
 803         Remove _M_safe() and _M_base() calls.
 804         (map::operator=(initializer_list<>)): Remove _M_base() calls.
 805         * include/debug/multimap.h (multimap(multimap&&, const allocator_type&)):
 806         Remove _M_safe() and _M_base() calls.
 807         (multimap::operator=(initializer_list<>)): Remove _M_base() calls.
 808         * include/debug/set.h (set(set&&, const allocator_type&)):
 809         Remove _M_safe() and _M_base() calls.
 810         (set::operator=(initializer_list<>)): Remove _M_base() calls.
 811         * include/debug/multiset.h (multiset(multiset&&, const allocator_type&)):
 812         Remove _M_safe() and _M_base() calls.
 813         (multiset::operator=(initializer_list<>)): Remove _M_base() calls.
 814         * include/debug/string (basic_string(basic_string&&, const allocator_type&)):
 815         Remove _M_safe() and _M_base() calls.
 816         (basic_string::operator=(initializer_list<>)): Remove _M_base() call.
 817         (basic_string::operator=(const _CharT*), basic_string::operator=(_CharT)): Likewise.
 818         (basic_string::operator[](size_type), basic_string::operator+=(const basic_string&)):
 819         Likewise.
 820         (basic_string::operator+=(const _Char*), basic_string::operator+=(_CharT)): Likewise.
 821         * include/debug/unordered_map (unordered_map(unordered_map&&, const allocator_type&)):
 822         Remove _M_safe() and _M_base() calls.
 823         (unordered_map::operator=(initializer_list<>), unordered_map::merge):
 824         Remove _M_base() calls.
 825         (unordered_multimap(unordered_multimap&&, const allocator_type&)):
 826         Remove _M_safe() and _M_base() calls.
 827         (unordered_multimap::operator=(initializer_list<>), unordered_multimap::merge):
 828         Remove _M_base() calls.
 829         * include/debug/unordered_set (unordered_set(unordered_set&&, const allocator_type&)):
 830         Remove _M_safe() and _M_base() calls.
 831         (unordered_set::operator=(initializer_list<>), unordered_set::merge):
 832         Remove _M_base() calls.
 833         (unordered_multiset(unordered_multiset&&, const allocator_type&)):
 834         Remove _M_safe() and _M_base() calls.
 835         (unordered_multiset::operator=(initializer_list<>), unordered_multiset::merge):
 836         Remove _M_base() calls.
 837         * include/debug/vector (vector(vector&&, const allocator_type&)):
 838         Remove _M_safe() and _M_base() calls.
 839         (vector::operator=(initializer_list<>)): Remove _M_base() calls.
 840         (vector::operator[](size_type)): Likewise.
 841
 842 2021-11-13  Jonathan Wakely  <jwakely@redhat.com>
 843
 844         * include/Makefile.am: Add spanstream header.
 845         * include/Makefile.in: Regenerate.
 846         * include/precompiled/stdc++.h: Add spanstream header.
 847         * include/std/version (__cpp_lib_spanstream): Define.
 848         * include/std/spanstream: New file.
 849         * testsuite/27_io/spanstream/1.cc: New test.
 850         * testsuite/27_io/spanstream/version.cc: New test.
 851
 852 2021-11-13  Hans-Peter Nilsson  <hp@axis.com>
 853
 854         PR libstdc++/103166
 855         * acinclude.m4 (GLIBCXX_CHECK_GETENTROPY, GLIBCXX_CHECK_ARC4RANDOM):
 856         Use GCC_TRY_COMPILE_OR_LINK instead of AC_TRY_COMPILE.
 857         * configure: Regenerate.
 858
 859 2021-11-12  Jonathan Wakely  <jwakely@redhat.com>
 860
 861         PR libstdc++/59675
 862         * acinclude.m4 (libtool_VERSION): Bump version.
 863         * config/abi/pre/gnu.ver (GLIBCXX_3.4.30): Add version and
 864         export new symbol.
 865         * configure: Regenerate.
 866         * include/bits/c++config (__replacement_assert): Remove, declare
 867         __glibcxx_assert_fail instead.
 868         * src/c++11/debug.cc (__glibcxx_assert_fail): New function to
 869         replace __replacement_assert, writing to stderr instead of
 870         stdout.
 871         * testsuite/util/testsuite_abi.cc: Update latest version.
 872
 873 2021-11-12  Jonathan Wakely  <jwakely@redhat.com>
 874             Josh Marshall  <joshua.r.marshall.1991@gmail.com>
 875
 876         * include/bits/alloc_traits.h (_Destroy): Make constexpr for
 877         C++20 mode.
 878         * include/bits/allocator.h (__shrink_to_fit::_S_do_it):
 879         Likewise.
 880         * include/bits/stl_algobase.h (__fill_a1): Declare _Bit_iterator
 881         overload constexpr for C++20.
 882         * include/bits/stl_bvector.h (_Bit_type, _S_word_bit): Move out
 883         of inline namespace.
 884         (_Bit_reference, _Bit_iterator_base, _Bit_iterator)
 885         (_Bit_const_iterator, _Bvector_impl_data, _Bvector_base)
 886         (vector<bool, A>>): Add constexpr to every member function.
 887         (_Bvector_base::_M_allocate): Initialize storage during constant
 888         evaluation.
 889         (vector<bool, A>::_M_initialize_value): Use __fill_bvector_n
 890         instead of memset.
 891         (__fill_bvector_n): New helper function to replace memset during
 892         constant evaluation.
 893         * include/bits/stl_uninitialized.h (__uninitialized_copy<false>):
 894         Move logic to ...
 895         (__do_uninit_copy): New function.
 896         (__uninitialized_fill<false>): Move logic to ...
 897         (__do_uninit_fill): New function.
 898         (__uninitialized_fill_n<false>): Move logic to ...
 899         (__do_uninit_fill_n): New function.
 900         (__uninitialized_copy_a): Add constexpr. Use __do_uninit_copy.
 901         (__uninitialized_move_a, __uninitialized_move_if_noexcept_a):
 902         Add constexpr.
 903         (__uninitialized_fill_a): Add constexpr. Use __do_uninit_fill.
 904         (__uninitialized_fill_n_a): Add constexpr. Use
 905         __do_uninit_fill_n.
 906         (__uninitialized_default_n, __uninitialized_default_n_a)
 907         (__relocate_a_1, __relocate_a): Add constexpr.
 908         * include/bits/stl_vector.h (_Vector_impl_data, _Vector_impl)
 909         (_Vector_base, vector): Add constexpr to every member function.
 910         (_Vector_impl::_S_adjust): Disable ASan annotation during
 911         constant evaluation.
 912         (_Vector_base::_S_use_relocate): Disable bitwise-relocation
 913         during constant evaluation.
 914         (vector::_Temporary_value): Use a union for storage.
 915         * include/bits/vector.tcc (vector, vector<bool>): Add constexpr
 916         to every member function.
 917         * include/std/vector (erase_if, erase): Add constexpr.
 918         * testsuite/23_containers/headers/vector/synopsis.cc: Add
 919         constexpr for C++20 mode.
 920         * testsuite/23_containers/vector/bool/cmp_c++20.cc: Change to
 921         compile-only test using constant expressions.
 922         * testsuite/23_containers/vector/bool/capacity/29134.cc: Adjust
 923         namespace for _S_word_bit.
 924         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
 925         Likewise.
 926         * testsuite/23_containers/vector/cmp_c++20.cc: Likewise.
 927         * testsuite/23_containers/vector/cons/89164.cc: Adjust errors
 928         for C++20 and move C++17 test to ...
 929         * testsuite/23_containers/vector/cons/89164_c++17.cc: ... here.
 930         * testsuite/23_containers/vector/bool/capacity/constexpr.cc: New test.
 931         * testsuite/23_containers/vector/bool/cons/constexpr.cc: New test.
 932         * testsuite/23_containers/vector/bool/element_access/constexpr.cc: New test.
 933         * testsuite/23_containers/vector/bool/modifiers/assign/constexpr.cc: New test.
 934         * testsuite/23_containers/vector/bool/modifiers/constexpr.cc: New test.
 935         * testsuite/23_containers/vector/bool/modifiers/swap/constexpr.cc: New test.
 936         * testsuite/23_containers/vector/capacity/constexpr.cc: New test.
 937         * testsuite/23_containers/vector/cons/constexpr.cc: New test.
 938         * testsuite/23_containers/vector/data_access/constexpr.cc: New test.
 939         * testsuite/23_containers/vector/element_access/constexpr.cc: New test.
 940         * testsuite/23_containers/vector/modifiers/assign/constexpr.cc: New test.
 941         * testsuite/23_containers/vector/modifiers/constexpr.cc: New test.
 942         * testsuite/23_containers/vector/modifiers/swap/constexpr.cc: New test.
 943
 944 2021-11-11  Jonathan Wakely  <jwakely@redhat.com>
 945
 946         * include/debug/deque (deque::operator=(const deque&)): Remove
 947         definition.
 948         * include/debug/list (list::operator=(const list&)): Likewise.
 949         * include/debug/map.h (map::operator=(const map&)): Likewise.
 950         * include/debug/multimap.h (multimap::operator=(const multimap&)):
 951         Likewise.
 952         * include/debug/multiset.h (multiset::operator=(const multiset&)):
 953         Likewise.
 954         * include/debug/set.h (set::operator=(const set&)): Likewise.
 955         * include/debug/string (basic_string::operator=(const basic_string&)):
 956         Likewise.
 957         * include/debug/vector (vector::operator=(const vector&)):
 958         Likewise.
 959         (_Safe_vector::operator=(const _Safe_vector&)): Define for
 960         C++98 as well.
 961
 962 2021-11-11  Jonathan Wakely  <jwakely@redhat.com>
 963
 964         * include/std/memory_resource (memory_resource::allocate):
 965         Implicitly create objects in the returned storage.
 966
 967 2021-11-11  Jonathan Wakely  <jwakely@redhat.com>
 968
 969         * include/bits/stl_bvector.h (vector<bool>::data()): Give
 970         protected access, and delete for C++11 and later.
 971
 972 2021-11-10  Jonathan Wakely  <jwakely@redhat.com>
 973
 974         PR libstdc++/100117
 975         * testsuite/17_intro/headers/c++1998/49745.cc: Explicitly list
 976         all C++ headers instead of including <bits/stdc++.h>
 977
 978 2021-11-10  Jonathan Wakely  <jwakely@redhat.com>
 979
 980         PR libstdc++/100748
 981         PR libstdc++/103133
 982         * config/os/gnu-linux/os_defines.h (_GLIBCXX_GTHREAD_USE_WEAK):
 983         Define for glibc 2.34 and later.
 984
 985 2021-11-09  François Dumont  <fdumont@gcc.gnu.org>
 986
 987         * include/bits/hashtable_policy.h (__distance_fw): Replace class keyword with
 988         typename.
 989         * include/bits/hashtable.h (_Hashtable<>::_M_merge_unique): Remove noexcept
 990         qualification. Use const_iterator for node extraction/reinsert.
 991         (_Hashtable<>::_M_merge_multi): Likewise. Compute new hash code before extract.
 992         * include/debug/safe_container.h (_Safe_container<>): Make all methods
 993         protected.
 994         * include/debug/safe_unordered_container.h
 995         (_Safe_unordered_container<>::_UContInvalidatePred<_ExtractKey, _Source>): New.
 996         (_Safe_unordered_container<>::_UMContInvalidatePred<_ExtractKey, _Source>): New.
 997         (_Safe_unordered_container<>::_UContMergeGuard<_Source, _InvalidatePred>): New.
 998         (_Safe_unordered_container<>::_S_uc_guard<_ExtractKey, _Source>): New.
 999         (_Safe_unordered_container<>::_S_umc_guard<_ExtractKey, _Source>): New.
1000         (_Safe_unordered_container<>::_M_invalide_all): Make public.
1001         (_Safe_unordered_container<>::_M_invalide_if): Likewise.
1002         (_Safe_unordered_container<>::_M_invalide_local_if): Likewise.
1003         * include/debug/unordered_map
1004         (unordered_map<>::mapped_type, pointer, const_pointer): New typedef.
1005         (unordered_map<>::reference, const_reference, difference_type): New typedef.
1006         (unordered_map<>::get_allocator, empty, size, max_size): Add usings.
1007         (unordered_map<>::bucket_count, max_bucket_count, bucket): Add usings.
1008         (unordered_map<>::hash_function, key_equal, count, contains): Add usings.
1009         (unordered_map<>::operator[], at, rehash, reserve): Add usings.
1010         (unordered_map<>::merge): New.
1011         (unordered_multimap<>::mapped_type, pointer, const_pointer): New typedef.
1012         (unordered_multimap<>::reference, const_reference, difference_type): New typedef.
1013         (unordered_multimap<>::get_allocator, empty, size, max_size): Add usings.
1014         (unordered_multimap<>::bucket_count, max_bucket_count, bucket): Add usings.
1015         (unordered_multimap<>::hash_function, key_equal, count, contains): Add usings.
1016         (unordered_multimap<>::rehash, reserve): Add usings.
1017         (unordered_multimap<>::merge): New.
1018         * include/debug/unordered_set
1019         (unordered_set<>::mapped_type, pointer, const_pointer): New typedef.
1020         (unordered_set<>::reference, const_reference, difference_type): New typedef.
1021         (unordered_set<>::get_allocator, empty, size, max_size): Add usings.
1022         (unordered_set<>::bucket_count, max_bucket_count, bucket): Add usings.
1023         (unordered_set<>::hash_function, key_equal, count, contains): Add usings.
1024         (unordered_set<>::rehash, reserve): Add usings.
1025         (unordered_set<>::merge): New.
1026         (unordered_multiset<>::mapped_type, pointer, const_pointer): New typedef.
1027         (unordered_multiset<>::reference, const_reference, difference_type): New typedef.
1028         (unordered_multiset<>::get_allocator, empty, size, max_size): Add usings.
1029         (unordered_multiset<>::bucket_count, max_bucket_count, bucket): Add usings.
1030         (unordered_multiset<>::hash_function, key_equal, count, contains): Add usings.
1031         (unordered_multiset<>::rehash, reserve): Add usings.
1032         (unordered_multiset<>::merge): New.
1033         * testsuite/23_containers/unordered_map/debug/merge1_neg.cc: New test.
1034         * testsuite/23_containers/unordered_map/debug/merge2_neg.cc: New test.
1035         * testsuite/23_containers/unordered_map/debug/merge3_neg.cc: New test.
1036         * testsuite/23_containers/unordered_map/debug/merge4_neg.cc: New test.
1037         * testsuite/23_containers/unordered_multimap/debug/merge1_neg.cc: New test.
1038         * testsuite/23_containers/unordered_multimap/debug/merge2_neg.cc: New test.
1039         * testsuite/23_containers/unordered_multimap/debug/merge3_neg.cc: New test.
1040         * testsuite/23_containers/unordered_multimap/debug/merge4_neg.cc: New test.
1041         * testsuite/23_containers/unordered_multiset/debug/merge1_neg.cc: New test.
1042         * testsuite/23_containers/unordered_multiset/debug/merge2_neg.cc: New test.
1043         * testsuite/23_containers/unordered_multiset/debug/merge3_neg.cc: New test.
1044         * testsuite/23_containers/unordered_multiset/debug/merge4_neg.cc: New test.
1045         * testsuite/23_containers/unordered_set/debug/merge1_neg.cc: New test.
1046         * testsuite/23_containers/unordered_set/debug/merge2_neg.cc: New test.
1047         * testsuite/23_containers/unordered_set/debug/merge3_neg.cc: New test.
1048         * testsuite/23_containers/unordered_set/debug/merge4_neg.cc: New test.
1049         * testsuite/util/testsuite_abi.h: [_GLIBCXX_DEBUG] Use normal unordered
1050         container implementation.
1051
1052 2021-11-09  Jonathan Wakely  <jwakely@redhat.com>
1053
1054         * testsuite/26_numerics/random/random_device/cons/token.cc:
1055         Print results of random_device_available checks.
1056
1057 2021-11-09  Jonathan Wakely  <jwakely@redhat.com>
1058
1059         PR libstdc++/103146
1060         * src/c++11/random.cc: Check __powerpc64__ not __powerpc__.
1061
1062 2021-11-09  Jonathan Wakely  <jwakely@redhat.com>
1063
1064         * acinclude.m4 (GLIBCXX_CHECK_GETENTROPY, GLIBCXX_CHECK_ARC4RANDOM):
1065         Define.
1066         * configure.ac (GLIBCXX_CHECK_GETENTROPY, GLIBCXX_CHECK_ARC4RANDOM):
1067         Use them.
1068         * config.h.in: Regenerate.
1069         * configure: Regenerate.
1070         * src/c++11/random.cc (random_device): Add getentropy and
1071         arc4random as sources.
1072         * testsuite/26_numerics/random/random_device/cons/token.cc:
1073         Check new tokens.
1074         * testsuite/26_numerics/random/random_device/entropy.cc:
1075         Likewise.
1076
1077 2021-11-09  Jonathan Wakely  <jwakely@redhat.com>
1078
1079         * testsuite/26_numerics/random/random_device/cons/token.cc:
1080         Retry if random devices produce the same value.
1081
1082 2021-11-09  Rasmus Villemoes  <rasmus.villemoes@prevas.dk>
1083
1084         * config/os/vxworks/os_defines.h (_GLIBCXX_HAVE_TLS): Only
1085         define for VxWorks >= 6.6.
1086
1087 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
1088
1089         * include/bits/range_access.h (begin(valarray), end(valarray)):
1090         Add noexcept.
1091
1092 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
1093
1094         * include/std/tuple (tuple_size_v): Fix pack expansion.
1095
1096 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
1097
1098         * src/c++11/random.cc (__x86_rdrand, __x86_rdseed): Add
1099         [[unlikely]] attribute.
1100
1101 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
1102
1103         * src/c++11/random.cc [__powerpc__] (USE_DARN): Define.
1104         (__ppc_darn): New function to use POWER9 DARN instruction.
1105         (Which): Add 'darn' enumerator.
1106         (which_source): Check for __ppc_darn.
1107         (random_device::_M_init): Support "darn" and "hw" tokens.
1108         (random_device::_M_getentropy): Add darn to switch.
1109         * testsuite/26_numerics/random/random_device/cons/token.cc:
1110         Check "darn" token.
1111         * testsuite/26_numerics/random/random_device/entropy.cc:
1112         Likewise.
1113
1114 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
1115
1116         * testsuite/lib/gdb-test.exp: Add target selector support to the
1117         dg-final directives.
1118         * testsuite/libstdc++-prettyprinters/80276.cc: Add xfail for
1119         C++20.
1120         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
1121         * testsuite/libstdc++-prettyprinters/prettyprinters.exp: Tweak
1122         comment.
1123
1124 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
1125
1126         PR libstdc++/103086
1127         * python/libstdcxx/v6/printers.py (_tuple_impl_get): New helper
1128         for accessing the tuple element stored in a _Tuple_impl node.
1129         (tuple_get): New function for accessing a tuple element.
1130         (unique_ptr_get): New function for accessing a unique_ptr.
1131         (UniquePointerPrinter, StdPathPrinter): Use unique_ptr_get.
1132         * python/libstdcxx/v6/xmethods.py (UniquePtrGetWorker): Cast
1133         tuple to its base class before accessing _M_head_impl.
1134
1135 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
1136
1137         * doc/xml/manual/evolution.xml: Document deprecations.
1138         * doc/html/*: Regenerate.
1139         * libsupc++/exception (unexpected_handler, unexpected)
1140         (get_unexpected, set_unexpected): Add deprecated attribute.
1141         Do not define without _GLIBCXX_USE_DEPRECATED for C++17 and up.
1142         * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Disable
1143         deprecated warnings.
1144         * libsupc++/eh_ptr.cc (std::rethrow_exception): Likewise.
1145         * libsupc++/eh_terminate.cc: Likewise.
1146         * libsupc++/eh_throw.cc (__cxa_init_primary_exception):
1147         Likewise.
1148         * libsupc++/unwind-cxx.h (struct __cxa_exception): Use
1149         terminate_handler instead of unexpected_handler.
1150         (struct __cxa_dependent_exception): Likewise.
1151         (__unexpected): Likewise.
1152         * testsuite/18_support/headers/exception/synopsis.cc: Add
1153         dg-warning for deprecated warning.
1154         * testsuite/18_support/exception_ptr/60612-unexpected.cc:
1155         Disable deprecated warnings.
1156         * testsuite/18_support/set_unexpected.cc: Likewise.
1157         * testsuite/18_support/unexpected_handler.cc: Likewise.
1158
1159 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
1160
1161         * include/bits/utility.h (__find_uniq_type_in_pack): Move
1162         definition to here, ...
1163         * include/std/tuple (__find_uniq_type_in_pack): ... from here.
1164         * include/std/variant (__detail__variant::__index_of): Remove.
1165         (__detail::__variant::__exactly_once): Define using
1166         __find_uniq_type_in_pack instead of __index_of.
1167         (get<T>, get_if<T>, variant::__index_of): Likewise.
1168
1169 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
1170
1171         * include/bits/stl_pair.h (tuple_size_v): Define partial
1172         specializations for std::pair.
1173         * include/bits/utility.h (_Nth_type): Move definition here
1174         and define primary template.
1175         (tuple_size_v): Move definition here.
1176         * include/std/array (tuple_size_v): Define partial
1177         specializations for std::array.
1178         * include/std/tuple (tuple_size_v): Move primary template to
1179         <bits/utility.h>.  Define partial specializations for
1180         std::tuple.
1181         (tuple_element): Change definition to use _Nth_type.
1182         * include/std/variant (_Nth_type): Move to <bits/utility.h>.
1183         (variant_alternative, variant): Adjust qualification of
1184         _Nth_type.
1185         * testsuite/20_util/tuple/element_access/get_neg.cc: Prune
1186         additional errors from _Nth_type.
1187
1188 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
1189
1190         * include/std/variant (__detail::__variant::__emplace): New
1191         function template.
1192         (_Copy_assign_base::operator=): Reorder conditions to match
1193         bulleted list of effects in the standard. Use __emplace instead
1194         of _M_reset followed by _Construct.
1195         (_Move_assign_base::operator=): Likewise.
1196         (__construct_by_index): Remove.
1197         (variant::emplace): Use __emplace instead of _M_reset followed
1198         by __construct_by_index.
1199         (variant::swap): Hoist valueless cases out of visitor. Use
1200         __emplace to replace _M_reset followed by _Construct.
1201
1202 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
1203
1204         * include/std/variant (_Nth_type): Define partial
1205         specializations to reduce number of instantiations.
1206         (variant_size_v): Define partial specializations to avoid
1207         instantiations.
1208         (variant_alternative): Use _Nth_type. Add static assert.
1209         (__tuple_count, __tuple_count_v): Replace with ...
1210         (__count): New variable template.
1211         (_Variant_union): Add deleted constructor.
1212         (variant::__to_type): Use _Nth_type.
1213         (variant::emplace): Use _Nth_type. Add deleted overloads for
1214         invalid types and indices.
1215
1216 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
1217
1218         PR libstdc++/102912
1219         * include/std/variant (_Variant_storage::__index_of): Remove.
1220         (__variant_construct_single): Remove.
1221         (__variant_construct): Remove.
1222         (_Copy_ctor_base::_Copy_ctor_base(const _Copy_ctor_base&)): Do
1223         construction directly instead of using __variant_construct.
1224         (_Move_ctor_base::_Move_ctor_base(_Move_ctor_base&&)): Likewise.
1225         (_Move_ctor_base::_M_destructive_move()): Remove.
1226         (_Move_ctor_base::_M_destructive_copy()): Remove.
1227         (_Copy_assign_base::operator=(const _Copy_assign_base&)): Do
1228         construction directly instead of using _M_destructive_copy.
1229         (variant::swap): Do construction directly instead of using
1230         _M_destructive_move.
1231         * testsuite/20_util/variant/102912.cc: New test.
1232
1233 2021-11-03  Jonathan Wakely  <jwakely@redhat.com>
1234
1235         PR libstdc++/66742
1236         * include/bits/list.tcc (list::sort): Use mutable iterators for
1237         comparisons.
1238         * include/bits/stl_list.h (_Scratch_list::_Ptr_cmp): Likewise.
1239         * testsuite/23_containers/list/operations/66742.cc: Check
1240         non-const comparisons.
1241
1242 2021-11-03  Jonathan Wakely  <jwakely@redhat.com>
1243
1244         * include/std/valarray (valarray::valarray()): Add noexcept.
1245         (valarray::operator[]): Likewise.
1246
1247 2021-11-01  Jonathan Wakely  <jwakely@redhat.com>
1248
1249         * include/debug/stl_iterator.h (__valid_range): Add constexpr
1250         for C++20. Qualify call to avoid ADL.
1251         (__get_distance, __can_advance, __unsafe, __base): Likewise.
1252         * testsuite/25_algorithms/move/constexpr.cc: Also check with
1253         std::reverse_iterator arguments.
1254
1255 2021-11-01  Jonathan Wakely  <jwakely@redhat.com>
1256
1257         * include/std/span (span(Range&&)): Reorder constraints.
1258
1259 2021-11-01  Jonathan Wakely  <jwakely@redhat.com>
1260
1261         PR libstdc++/103022
1262         * include/std/valarray (begin, end): Do not dereference an empty
1263         valarray. Add noexcept and [[nodiscard]].
1264         * testsuite/26_numerics/valarray/range_access.cc: Check empty
1265         valarray. Check iterator properties. Run as well as compiling.
1266         * testsuite/26_numerics/valarray/range_access2.cc: Likewise.
1267         * testsuite/26_numerics/valarray/103022.cc: New test.
1268
1269 2021-10-29  Jonathan Wakely  <jwakely@redhat.com>
1270
1271         * testsuite/23_containers/stack/deduction.cc: Fix typo.
1272
1273 2021-10-26  Martin Sebor  <msebor@redhat.com>
1274
1275         * testsuite/21_strings/basic_string/capacity/1.cc: Also suppress
1276         -Wstringop-overread.
1277         * testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc: Same.
1278
1279 2021-10-26  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
1280
1281         * testsuite/28_regex/basic_regex/84110.cc (test01)
1282         [__cpp_exceptions]: Disambiguate extended.
1283
1284 2021-10-26  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
1285
1286         * testsuite/17_intro/names.cc [__sun__] (r, x): Undef.
1287
1288 2021-10-22  Jonathan Wakely  <jwakely@redhat.com>
1289
1290         PR libstdc++/102894
1291         * include/std/any (make_any): Add SFINAE constraint.
1292         * testsuite/20_util/any/102894.cc: New test.
1293
1294 2021-10-21  Jonathan Wakely  <jwakely@redhat.com>
1295
1296         * doc/doxygen/stdheader.cc: Refactor. Use C++23. Add new
1297         headers.
1298         * scripts/run_doxygen: Fix post-processing of #include
1299         directives in man pages. Use new xg++ to compile helper program.
1300
1301 2021-10-21  Jonathan Wakely  <jwakely@redhat.com>
1302
1303         * include/bits/mofunc_impl.h: Add doxygen comments.
1304         * include/std/functional: Likewise.
1305
1306 2021-10-21  Jonathan Wakely  <jwakely@redhat.com>
1307
1308         * include/bits/alloc_traits.h: Suppress doxygen documentation.
1309         * include/bits/allocated_ptr.h: Likewise.
1310         * include/bits/enable_special_members.h: Likewise.
1311         * include/bits/hashtable.h: Likewise.
1312         * include/bits/hashtable_policy.h: Likewise.
1313         * include/bits/uses_allocator.h: Likewise.
1314         * include/bits/node_handle.h: Document node handles and suppress
1315         documentation for protected members.
1316         * include/std/any: Suppress documentation for implementation
1317         details.
1318
1319 2021-10-21  Patrick Palka  <ppalka@redhat.com>
1320
1321         PR libstdc++/102358
1322         * include/bits/stl_iterator.h (__niter_base): Make constexpr
1323         for C++20.
1324         (__miter_base): Likewise.
1325         * testsuite/25_algorithms/move/constexpr.cc: New test.
1326
1327 2021-10-21  Patrick Palka  <ppalka@redhat.com>
1328
1329         * include/std/ranges (istream_view): Replace this function
1330         template with an alias template as per P2432R1.
1331         (wistream_view): Define as per P2432R1.
1332         (views::_Istream, views::istream): Likewise.
1333         * testsuite/std/ranges/istream_view.cc (test07): New test.
1334
1335 2021-10-21  Patrick Palka  <ppalka@redhat.com>
1336
1337         * include/bits/ranges_util.h (views::_Drop): Forward declare.
1338         (subrange): Befriend views::_Drop.
1339         (subrange::_S_store_size): Declare constexpr instead of just
1340         const, remove obsolete comment.
1341         * include/std/ranges (views::__detail::__is_empty_view): Define.
1342         (views::__detail::__is_basic_string_view): Likewise.
1343         (views::__detail::__is_subrange): Likewise.
1344         (views::__detail::__is_iota_view): Likewise.
1345         (views::__detail::__can_take_view): Rename template parm _Tp to _Dp.
1346         (views::_Take): Rename template parm _Tp to _Dp, make it non-deducible
1347         and fix it to range_difference_t<_Range>.  Implement P1739R4 and
1348         LWG 3407 changes.
1349         (views::__detail::__can_drop_view): Rename template parm _Tp to _Dp.
1350         (views::_Drop): As with views::_Take.
1351         (views::_Counted): Implement P1739R4 changes.
1352         * include/std/span (__detail::__is_std_span): Rename to ...
1353         (__detail::__is_span): ... this and turn it into a variable
1354         template.
1355         (__detail::__is_std_array): Turn it into a variable template.
1356         (span::span): Adjust uses of __is_std_span and __is_std_array
1357         accordingly.
1358         * testsuite/std/ranges/adaptors/p1739.cc: New test.
1359
1360 2021-10-21  Patrick Palka  <ppalka@redhat.com>
1361
1362         * include/bits/stl_iterator.h (common_iterator::__arrow_proxy):
1363         Make fully constexpr as per LWG 3595.
1364         (common_iterator::__postfix_proxy): Likewise.
1365
1366 2021-10-21  Patrick Palka  <ppalka@redhat.com>
1367
1368         * include/std/ranges (lazy_split_view::base): Add forward_range
1369         constraint as per LWG 3591.
1370         (lazy_split_view::begin, lazy_split_view::end): Also check
1371         simpleness of _Pattern as per LWG 3592.
1372         (split_view::base): Relax copyable constraint as per LWG 3590.
1373
1374 2021-10-21  Patrick Palka  <ppalka@redhat.com>
1375
1376         * include/std/ranges (join_view::__iter_cat::_S_iter_cat): Adjust
1377         criteria for returning bidirectional_iterator_tag as per LWG 3535.
1378         (join_view::_Iterator::_S_iter_concept): Likewise.
1379
1380 2021-10-21  Patrick Palka  <ppalka@redhat.com>
1381
1382         * include/bits/ranges_base.h (viewable_range): Adjust as per
1383         LWG 3481.
1384         * testsuite/std/ranges/adaptors/all.cc (test07): New test.
1385
1386 2021-10-21  Jonathan Wakely  <jwakely@redhat.com>
1387
1388         PR libstdc++/102863
1389         * include/std/optional (optional::and_then, optional::transform):
1390         Remove requires-clause.
1391         * testsuite/20_util/optional/monadic/and_then.cc: Check
1392         overload resolution doesn't cause errors.
1393         * testsuite/20_util/optional/monadic/transform.cc: Likewise.
1394
1395 2021-10-20  Jonathan Wakely  <jwakely@redhat.com>
1396
1397         * testsuite/20_util/optional/monadic/transform.cc: Check that
1398         an rvalue result is not materialized too soon.
1399
1400 2021-10-19  Patrick Palka  <ppalka@redhat.com>
1401
1402         * include/std/ranges (iota_view::_Iterator::operator+): Adjust
1403         definition as per LWG 3580.
1404         (iota_view::_Iterator::operator-): Likewise.
1405
1406 2021-10-19  Patrick Palka  <ppalka@redhat.com>
1407
1408         * include/std/ranges (basic_istream_view::_M_object): Value
1409         initialize as per LWG 3568.
1410
1411 2021-10-19  Patrick Palka  <ppalka@redhat.com>
1412
1413         * include/bits/ranges_util.h
1414         (__detail::__uses_nonqualification_pointer_conversion): Define
1415         and use it ...
1416         (__detail::__convertible_to_nonslicing): ... here, as per LWG 3470.
1417         * testsuite/std/ranges/subrange/1.cc: New test.
1418
1419 2021-10-19  Patrick Palka  <ppalka@redhat.com>
1420
1421         * include/std/ranges (iota_view::_Iterator): Befriend iota_view.
1422         (iota_view::_Sentinel): Likewise.
1423         (iota_view::iota_view): Add three overloads, each taking an
1424         iterator/sentinel pair as per LWG 3523.
1425         * testsuite/std/ranges/iota/iota_view.cc (test06): New test.
1426
1427 2021-10-19  Patrick Palka  <ppalka@redhat.com>
1428
1429         * include/bits/ranges_base.h (view_interface): Forward declare.
1430         (__detail::__is_derived_from_view_interface_fn): Declare.
1431         (__detail::__is_derived_from_view_interface): Define as per LWG 3549.
1432         (enable_view): Adjust as per LWG 3549.
1433         * include/bits/ranges_util.h (view_interface): Don't derive from
1434         view_base.
1435         * include/std/ranges (filter_view): Revert r11-3504 change.
1436         (transform_view): Likewise.
1437         (take_view): Likewise.
1438         (take_while_view): Likewise.
1439         (drop_view): Likewise.
1440         (drop_while_view): Likewise.
1441         (join_view): Likewise.
1442         (lazy_split_view): Likewise.
1443         (split_view): Likewise.
1444         (reverse_view): Likewise.
1445         * testsuite/std/ranges/adaptors/sizeof.cc: Update expected sizes.
1446         * testsuite/std/ranges/view.cc (test_view::test_view): Remove
1447         this default ctor since views no longer need to be default initable.
1448         (test01): New test.
1449
1450 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
1451
1452         * src/c++11/random.cc (which_source): New helper function.
1453         (random_device::_M_getentropy()): Use which_source and return
1454         suitable values for sources other than device files.
1455         * testsuite/26_numerics/random/random_device/entropy.cc: New test.
1456
1457 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
1458
1459         * doc/Makefile.am (stamp-html-doxygen, stamp-html-doxygen)
1460         (stamp-latex-doxygen, stamp-man-doxygen): Fix recipes for
1461         relative ${top_srcdir}.
1462         * doc/Makefile.in: Regenerate.
1463
1464 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
1465
1466         * include/std/variant (_Uninitialized): Use an empty struct
1467         for the unused union member, instead of char.
1468
1469 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
1470
1471         * include/bits/stl_stack.h (stack(Iterator, Iterator)): Remove
1472         non-deducible template parameter from deduction guide.
1473         * testsuite/23_containers/stack/deduction.cc: Check new C++23
1474         deduction guides.
1475
1476 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
1477
1478         * include/std/optional (_Optional_payload_base::_Storage): Add
1479         constructor taking a callable function to invoke.
1480         (_Optional_payload_base::_M_apply): New function.
1481         (__cpp_lib_monadic_optional): Define for C++23.
1482         (optional::and_then, optional::transform, optional::or_else):
1483         Define for C++23.
1484         * include/std/ranges (__detail::__cached): Remove.
1485         (__detail::__non_propagating_cache): Remove use of __cached for
1486         contained value. Use _Optional_payload_base::_M_construct and
1487         _Optional_payload_base::_M_apply to set the contained value.
1488         * include/std/version (__cpp_lib_monadic_optional): Define.
1489         * testsuite/20_util/optional/monadic/and_then.cc: New test.
1490         * testsuite/20_util/optional/monadic/or_else.cc: New test.
1491         * testsuite/20_util/optional/monadic/or_else_neg.cc: New test.
1492         * testsuite/20_util/optional/monadic/transform.cc: New test.
1493         * testsuite/20_util/optional/monadic/version.cc: New test.
1494
1495 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
1496
1497         PR libstdc++/102825
1498         * include/bits/mofunc_impl.h (move_only_function): Remove
1499         invalid base initializer.
1500         * testsuite/20_util/move_only_function/cons.cc: Instantiate
1501         constructors to check bodies.
1502
1503 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
1504
1505         * include/bits/fs_path.h (path::_S_convert(T)): Avoid recursive
1506         call to function with deduced return type.
1507
1508 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
1509
1510         * include/bits/basic_string.h (__cpp_lib_string_resize_and_overwrite):
1511         Define for C++23.
1512         (basic_string::resize_and_overwrite): Declare.
1513         * include/bits/basic_string.tcc (basic_string::resize_and_overwrite):
1514         Define.
1515         * include/std/version (__cpp_lib_resize_and_overwrite): Define
1516         for C++23.
1517         * testsuite/21_strings/basic_string/capacity/char/resize_and_overwrite.cc:
1518         New test.
1519
1520 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
1521
1522         PR libstdc++/101263
1523         * include/std/ranges (__cached): New wrapper struct.
1524         (__non_propagating_cache): Use __cached for contained value.
1525         (__non_propagating_cache::_M_emplace_deref): Add constexpr. Use
1526         std::construct_at instead of placement new.
1527         * testsuite/std/ranges/adaptors/join.cc: Check constexpr works.
1528
1529 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
1530
1531         * include/std/variant (__cpp_lib_variant): Update value for
1532         C++20.
1533         (__variant_cast, __variant_construct): Add constexpr for C++20.
1534         (__variant_construct_single, __construct_by_index) Likewise. Use
1535         std::_Construct instead of placement new.
1536         (_Uninitialized<T, false>) [__cplusplus >= 202002]: Replace
1537         buffer with a union and define a destructor.
1538         (_Variadic_union) [__cplusplus >= 202002]: Add a specialization
1539         for non-trivial destruction.
1540         (_Variant_storage::__index_of): New helper variable template.
1541         (_Variant_storage::~_Variant_storage()): Add constexpr.
1542         (_Variant_storage::_M_reset()): Likewise.
1543         (_Copy_ctor_base, _Move_ctor_base): Likewise.
1544         (_Copy_assign_base, _Move_assign_base): Likewise.
1545         (variant, swap): Likewise.
1546         * include/std/version (__cpp_lib_variant): Update value for
1547         C++20.
1548         * testsuite/20_util/optional/version.cc: Check for exact value
1549         in C++17.
1550         * testsuite/20_util/variant/87619.cc: Increase timeout for
1551         C++20 mode.
1552         * testsuite/20_util/variant/constexpr.cc: New test.
1553         * testsuite/20_util/variant/version.cc: New test.
1554
1555 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
1556
1557         * include/std/variant (__detail::__variant::__get_storage):
1558         Remove unused function.
1559         (__variant_construct_by_index): Set index after construction is
1560         complete. Rename to ...
1561         (__detail::__variant::__construct_by_index): ... this.
1562         (variant): Use new name for __variant_construct_by_index friend
1563         declaration. Remove __get_storage friend declaration.
1564         (variant::emplace): Use new name and remove try-blocks.
1565
1566 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
1567
1568         * include/std/variant (_Variant_storage::_M_storage()): Remove.
1569         (__detail::__variant::__get_storage): Remove.
1570         (variant): Remove friend declaration of __get_storage.
1571
1572 2021-10-15  Jason Merrill  <jason@redhat.com>
1573
1574         * testsuite/20_util/integer_comparisons/greater_equal_neg.cc:
1575         * testsuite/20_util/integer_comparisons/greater_neg.cc:
1576         * testsuite/20_util/integer_comparisons/less_equal_neg.cc:
1577         Adjust expected message.
1578         * testsuite/lib/prune.exp: Prune 'in constexpr expansion'.
1579
1580 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
1581
1582         * include/std/variant (__variant::__get(in_place_index_t<N>, U&&)):
1583         Rename to __get_n and remove first argument. Replace pair of
1584         overloads with a single function using 'if constexpr'.
1585         (__variant::__get(Variant&&)): Adjust to use __get_n.
1586
1587 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
1588
1589         * include/bits/fs_path.h (path(path&&)): Make unconditionally
1590         noexcept.
1591         (path::_S_convert(T)): Add condtional noexcept.
1592
1593 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
1594
1595         PR libstdc++/102743
1596         * include/bits/fs_path.h (path::_S_convert(T)): Fix condition
1597         for returning the same string unchanged.
1598
1599 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
1600
1601         * include/bits/regex.h: Check __cpp_inline_variables instead of
1602         __cplusplus.
1603
1604 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
1605
1606         * testsuite/20_util/is_layout_compatible/version.cc: Check
1607         correct macro.
1608
1609 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
1610
1611         * include/bits/stl_construct.h (_Construct): Use
1612         std::construct_at when constant evaluated.
1613         * include/std/optional (_Storage, _Optional_payload, optional):
1614         Add constexpr as specified by P2231R1.
1615         * include/std/version (__cpp_lib_optional): Update value for
1616         C++20.
1617         * testsuite/20_util/optional/requirements.cc: Check feature test
1618         macro.
1619         * testsuite/20_util/optional/constexpr/assign.cc: New test.
1620         * testsuite/20_util/optional/constexpr/cons/conv.cc: New test.
1621         * testsuite/20_util/optional/constexpr/modifiers.cc: New test.
1622         * testsuite/20_util/optional/constexpr/swap.cc: New test.
1623         * testsuite/20_util/optional/version.cc: New test.
1624
1625 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
1626
1627         * include/bits/fs_path.h (__detail::__is_contiguous): Add
1628         partial specializations for pointers and __normal_iterator.
1629
1630 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
1631
1632         * testsuite/27_io/filesystem/path/construct/102592.C: Moved to...
1633         * testsuite/27_io/filesystem/path/construct/102592.cc: ...here.
1634         * testsuite/28_regex/match_results/102667.C: Moved to...
1635         * testsuite/28_regex/match_results/102667.cc: ...here.
1636
1637 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
1638
1639         * include/bits/fs_path.h (__detail::__is_contiguous): New
1640         variable template to identify contiguous iterators.
1641         (__detail::__unified_char8_t): New alias template to decide when
1642         to treat char8_t as char without encoding conversion.
1643         (__detail::__effective_range(const basic_string<C,T>&)): Use
1644         std::char_traits<C> for returned string view.
1645         (__detail::__effective_range(const basic_string_view<C,T>&)):
1646         Likewise.
1647         (__detail::__effective_range(const Source&)): Use
1648         __is_contiguous to detect mode cases of contiguous iterators.
1649         Use __unified_char8_t to return a std::string instead of
1650         std::u8string.
1651
1652 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
1653
1654         PR libstdc++/102592
1655         * include/bits/fs_path.h (path::path(Iter, Iter, format))
1656         (path::append(Iter, Iter), path::concat(Iter, Iter)): Call
1657         __string_from_range directly, instead of two-argument overload
1658         of _S_convert.
1659         (path::_S_convert(Iter, Iter)): Remove.
1660         * testsuite/27_io/filesystem/path/construct/102592.C: New test.
1661
1662 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
1663
1664         * include/bits/c++config (__terminate): Add extern "C++".
1665
1666 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
1667
1668         * testsuite/20_util/tuple/comparison_operators/overloaded.cc:
1669         Restore test for operator<.
1670         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
1671         Adjust expected errors for C++20.
1672
1673 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
1674
1675         PR libstdc++/101960
1676         * include/std/tuple (_Tuple_impl(_Tuple_impl&&)): Define as
1677         defauled.
1678         * testsuite/20_util/tuple/cons/101960.cc: Check tuples with
1679         array elements before the last element.
1680
1681 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
1682
1683         * include/bits/stl_iterator_base_funcs.h (__advance): Add
1684         deleted overload to improve diagnostics.
1685         (__distance): Likewise.
1686
1687 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
1688
1689         * include/bits/atomic_timed_wait.h: Remove unused header.
1690         * include/bits/c++config (std:__terminate): Define.
1691         * include/bits/semaphore_base.h: Remove <exception> and use
1692         __terminate instead of terminate.
1693         * include/bits/std_thread.h: Likewise.
1694         * libsupc++/eh_terminate.cc (std::terminate): Use qualified-id
1695         to call __cxxabiv1::__terminate.
1696
1697 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
1698
1699         * include/bits/regex.h (basic_regex::assign(Iter, Iter)): Avoid
1700         std::__to_address by using poitner directly or using base()
1701         member of __normal_iterator.
1702
1703 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
1704
1705         * testsuite/18_support/numeric_limits/lowest.cc: Use
1706         numeric_limits<T>::is_integer instead of is_integral<T>::value.
1707
1708 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
1709
1710         PR libstdc++/89927
1711         * include/bits/regex.h (basic_regex(const _Ch_type*, size_t)):
1712         Add __glibcxx_requires_string_len assertion.
1713         (basic_regex::assign(InputIterator, InputIterator)): Add
1714         __glibcxx_requires_valid_range assertion.
1715         * include/bits/regex_scanner.tcc (_Scanner::_M_advance())
1716         (_Scanner::_M_scan_normal()): Use string literal in assertions.
1717
1718 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
1719
1720         PR libstdc++/102667
1721         * include/bits/regex.h (match_result::empty()): Optimize by
1722         calling the base function directly.
1723         (match_results::end()): Check _Base_type::empty() not empty().
1724         * testsuite/28_regex/match_results/102667.C: New test.
1725
1726 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1727
1728         PR libstdc++/98725
1729         * testsuite/18_support/numeric_limits/lowest.cc: Remove use of
1730         _GLIBCXX_USE_WCHAR_T.
1731         * testsuite/18_support/numeric_limits/min_max.cc: Replace use of
1732         _GLIBCXX_USE_WCHAR_T with checks for WCHAR_MIN and WCHAR_MAX.
1733         * testsuite/20_util/from_chars/1_neg.cc: Remove use of
1734         _GLIBCXX_USE_WCHAR_T.
1735         * testsuite/20_util/function_objects/searchers.cc: Likewise. Use
1736         char_traits<wchar_t>::length instead of wcslen.
1737         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
1738         Likewise.
1739         * testsuite/20_util/is_arithmetic/value.cc: Likewise.
1740         * testsuite/20_util/is_compound/value.cc: Likewise.
1741         * testsuite/20_util/is_floating_point/value.cc: Likewise.
1742         * testsuite/20_util/is_fundamental/value.cc: Likewise.
1743         * testsuite/20_util/is_integral/value.cc: Likewise.
1744         * testsuite/20_util/is_signed/value.cc: Likewise.
1745         * testsuite/20_util/is_unsigned/value.cc: Likewise.
1746         * testsuite/20_util/is_void/value.cc: Likewise.
1747         * testsuite/20_util/make_signed/requirements/typedefs-1.cc:
1748         Likewise.
1749         * testsuite/20_util/make_signed/requirements/typedefs-2.cc:
1750         Likewise.
1751         * testsuite/20_util/make_signed/requirements/typedefs-3.cc:
1752         Likewise.
1753         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
1754         Likewise.
1755         * testsuite/20_util/make_unsigned/requirements/typedefs-1.cc:
1756         Likewise.
1757         * testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
1758         Likewise.
1759         * testsuite/20_util/make_unsigned/requirements/typedefs-3.cc:
1760         Likewise.
1761         * testsuite/20_util/to_chars/3.cc: Likewise.
1762         * testsuite/20_util/type_identity/requirements/typedefs.cc:
1763         Likewise.
1764         * testsuite/21_strings/basic_string/hash/debug.cc: Likewise.
1765         * testsuite/21_strings/basic_string/hash/hash.cc: Likewise.
1766         * testsuite/21_strings/basic_string/literals/types-char8_t.cc:
1767         Likewise.
1768         * testsuite/21_strings/basic_string/literals/types.cc: Likewise.
1769         * testsuite/21_strings/basic_string/literals/values-char8_t.cc:
1770         Likewise.
1771         * testsuite/21_strings/basic_string/literals/values.cc:
1772         Likewise.
1773         * testsuite/21_strings/basic_string/modifiers/64422.cc:
1774         Likewise.
1775         * testsuite/21_strings/basic_string/range_access/wchar_t/1.cc:
1776         Likewise.
1777         * testsuite/21_strings/basic_string/requirements/citerators.cc:
1778         Likewise.
1779         * testsuite/21_strings/basic_string/requirements/typedefs.cc:
1780         Likewise.
1781         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc:
1782         Likewise.
1783         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
1784         Likewise.
1785         * testsuite/21_strings/basic_string_view/literals/types.cc:
1786         Likewise.
1787         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
1788         Likewise.
1789         * testsuite/21_strings/basic_string_view/literals/values.cc:
1790         Likewise.
1791         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
1792         Likewise.
1793         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
1794         * testsuite/21_strings/char_traits/requirements/constexpr_functions.cc:
1795         Likewise.
1796         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
1797         Likewise.
1798         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
1799         Likewise.
1800         * testsuite/22_locale/ctype/is/string/89728_neg.cc: Likewise.
1801         * testsuite/25_algorithms/fill/4.cc: Likewise.
1802         * testsuite/25_algorithms/fill_n/1.cc: Likewise.
1803         * testsuite/experimental/functional/searchers.cc: Likewise. Use
1804         char_traits<wchar_t>::length instead of wcslen.
1805         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
1806         Likewise.
1807         * testsuite/experimental/string_view/literals/types-char8_t.cc:
1808         Likewise.
1809         * testsuite/experimental/string_view/literals/types.cc:
1810         Likewise.
1811         * testsuite/experimental/string_view/literals/values-char8_t.cc:
1812         Likewise.
1813         * testsuite/experimental/string_view/literals/values.cc:
1814         Likewise.
1815         * testsuite/experimental/string_view/range_access/wchar_t/1.cc:
1816         Likewise.
1817         * testsuite/experimental/string_view/requirements/typedefs.cc:
1818         Likewise.
1819         * testsuite/experimental/string_view/typedefs.cc: Likewise.
1820         * testsuite/ext/vstring/range_access.cc: Likewise.
1821         * testsuite/std/concepts/concepts.lang/concept.arithmetic/integral.cc:
1822         Likewise.
1823         * testsuite/std/concepts/concepts.lang/concept.arithmetic/signed_integral.cc:
1824         Likewise.
1825         * testsuite/std/concepts/concepts.lang/concept.arithmetic/unsigned_integral.cc:
1826         Likewise.
1827         * testsuite/tr1/4_metaprogramming/is_arithmetic/value.cc:
1828         Likewise.
1829         * testsuite/tr1/4_metaprogramming/is_compound/value.cc:
1830         Likewise.
1831         * testsuite/tr1/4_metaprogramming/is_floating_point/value.cc:
1832         Likewise.
1833         * testsuite/tr1/4_metaprogramming/is_fundamental/value.cc:
1834         Likewise.
1835         * testsuite/tr1/4_metaprogramming/is_integral/value.cc:
1836         Likewise.
1837         * testsuite/tr1/4_metaprogramming/is_signed/value.cc: Likewise.
1838         * testsuite/tr1/4_metaprogramming/is_unsigned/value.cc:
1839         Likewise.
1840         * testsuite/tr1/4_metaprogramming/is_void/value.cc: Likewise.
1841         * testsuite/tr1/6_containers/hash/24799.cc: Likewise.
1842
1843 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1844
1845         PR libstdc++/98725
1846         * include/std/ostream (operator<<(basic_ostream<char, Tr>&, wchar_t))
1847         (operator<<(basic_ostream<char, Tr>&, const wchar_t*)): Always
1848         define as deleted. Do not check _GLIBCXX_USE_WCHAR_T.
1849
1850 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1851
1852         PR libstdc++/98725
1853         * include/bits/locale_conv.h (wstring_convert, wbuffer_convert):
1854         Define unconditionally. Do not check _GLIBCXX_USE_WCHAR_T.
1855
1856 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1857
1858         PR libstdc++/98725
1859         * include/c_global/cstddef [!_GLIBCXX_USE_WCHAR_T]
1860         (__byte_operand<wchar_t>): Define specialization.
1861         * include/std/type_traits (__make_signed<wchar_t>)
1862         (__make_unsigned<wchar_t>): Remove redundant check for
1863         __WCHAR_TYPE__ being defined.
1864         * include/tr1/type_traits [!_GLIBCXX_USE_WCHAR_T]
1865         (__is_integral_helper<wchar_t>): Likewise.
1866
1867 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1868
1869         PR libstdc++/98725
1870         * include/ext/rc_string_base.h [!_GLIBCXX_USE_WCHAR_T]
1871         (__rc_string_base<wchar_t>): Define member function.
1872         * include/ext/vstring.h [!_GLIBCXX_USE_WCHAR_T]
1873         (hash<__gnu_cxx::__wvstring>): Define specialization.
1874         * include/ext/vstring_fwd.h [!_GLIBCXX_USE_WCHAR_T] (__wvstring)
1875         (__wsso_string, __wrc_string): Declare typedefs.
1876
1877 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1878
1879         PR libstdc++/98725
1880         * include/bits/char_traits.h (char_traits<wchar_t>): Define
1881         explicit specialization unconditionally.
1882         * include/bits/basic_string.h (hash<wstring>): Define
1883         unconditionally. Do not check _GLIBCXX_USE_WCHAR_T.
1884         * include/bits/stringfwd.h (wstring): Likewise.
1885         * include/debug/string (wstring): Likewise.
1886         * include/experimental/string_view (experimental::wstring_view)
1887         (hash<experimental::wstring_view>): Likewise.
1888         * include/std/string (pmr::wstring, hash<pmr::wstring>):
1889         Likewise.
1890         * include/std/string_view (wstring_view, hash<wstring_view>):
1891         Likewise.
1892
1893 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1894
1895         * testsuite/27_io/basic_filebuf/close/81256.cc: Moved to...
1896         * testsuite/27_io/basic_filebuf/close/wchar_t/81256.cc: ...here.
1897
1898 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1899
1900         * testsuite/22_locale/conversions/buffer/1.cc: Check
1901         _GLIBCXX_USE_WCHAR_T.
1902         * testsuite/22_locale/conversions/buffer/3.cc: Likewise. Add
1903         test using char16_t.
1904         * testsuite/22_locale/conversions/string/1.cc: Check
1905         _GLIBCXX_USE_WCHAR_T.
1906         * testsuite/27_io/filesystem/path/generic/generic_string.cc:
1907         Likewise.
1908         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
1909         Likewise.
1910         * testsuite/27_io/filesystem/path/native/alloc.cc: Likewise.
1911         * testsuite/27_io/filesystem/path/native/string-char8_t.cc:
1912         Likewise.
1913         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
1914         * testsuite/28_regex/algorithms/regex_match/extended/wstring_locale.cc:
1915         Likewise.
1916         * testsuite/experimental/filesystem/path/generic/generic_string.cc:
1917         Likewise.
1918         * testsuite/experimental/filesystem/path/native/alloc.cc:
1919         Likewise.
1920         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
1921         Likewise.
1922         * testsuite/experimental/filesystem/path/native/string.cc:
1923         Likewise.
1924
1925 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1926
1927         * testsuite/26_numerics/bit/bit.rotate/rotr.cc:
1928         * testsuite/util/testsuite_common_types.h:
1929
1930 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1931
1932         * testsuite/18_support/numeric_limits/40856.cc: Replace use of
1933         _GLIBCXX_USE_INT128.
1934         * testsuite/18_support/numeric_limits/dr559.cc: Likewise.
1935         * testsuite/18_support/numeric_limits/lowest.cc: Likewise.
1936         * testsuite/18_support/numeric_limits/max_digits10.cc: Likewise.
1937         * testsuite/20_util/is_floating_point/value.cc: Likewise.
1938         * testsuite/20_util/is_integral/value.cc: Likewise.
1939         * testsuite/20_util/is_signed/value.cc: Likewise.
1940         * testsuite/20_util/is_unsigned/value.cc: Likewise.
1941         * testsuite/20_util/make_signed/requirements/typedefs-1.cc:
1942         Likewise.
1943         * testsuite/20_util/make_signed/requirements/typedefs-2.cc:
1944         Likewise.
1945         * testsuite/20_util/make_unsigned/requirements/typedefs-1.cc:
1946         Likewise.
1947         * testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
1948         Likewise.
1949         * testsuite/20_util/type_identity/requirements/typedefs.cc:
1950         Likewise.
1951         * testsuite/26_numerics/bit/bit.count/countl_one.cc: Likewise.
1952         * testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
1953         * testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
1954         * testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
1955         * testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
1956         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: Likewise.
1957         * testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: Likewise.
1958         * testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: Likewise.
1959         * testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc:
1960         Likewise.
1961         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
1962
1963 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1964
1965         * include/bits/hashtable_policy.h (_Select1st): Replace use of
1966         std::get.
1967         (_Select2nd): Remove.
1968         (_NodeBuilder::_S_build): Use _NodeGenerator::__node_type
1969         typedef instead of deducing it. Remove unnecessary piecewise
1970         construction.
1971         (_ReuseOrAllocNode): Make __node_type public.
1972         (_Map_base): Adjust partial specialization to be able to extract
1973         the mapped_type without using tuple_element.
1974         (_Map_base::at): Define inline
1975         * testsuite/23_containers/unordered_map/requirements/53339.cc:
1976         Remove XFAIL.
1977         * testsuite/23_containers/unordered_multimap/requirements/53339.cc:
1978         Likewise.
1979
1980 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1981
1982         * include/bits/hashtable.h: Move static assertion to destructor.
1983         * include/bits/hashtable_policy.h: Deduce value type from node
1984         type without instantiating it.
1985
1986 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1987
1988         * src/c++11/limits.cc: Fail if __cpp_inline_variables is
1989         defined.
1990
1991 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1992
1993         PR libstdc++/92546
1994         * include/bits/ranges_algobase.h: Replace <iterator> with a
1995         subset of the headers it includes.
1996
1997 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1998
1999         * include/experimental/deque (erase, erase_if): Revert changes
2000         to avoid debug mode overhead.
2001         * include/experimental/map (erase, erase_if): Likewise.
2002         * include/experimental/set (erase, erase_if): Likewise.
2003         * include/experimental/unordered_map (erase, erase_if):
2004         Likewise.
2005         * include/experimental/unordered_set (erase, erase_if):
2006         Likewise.
2007         * include/experimental/vector (erase, erase_if): Likewise.
2008         * include/std/deque (erase, erase_if): Likewise.
2009         * include/std/map (erase, erase_if): Likewise.
2010         * include/std/set (erase, erase_if): Likewise.
2011         * include/std/unordered_map (erase, erase_if): Likewise.
2012         * include/std/unordered_set (erase, erase_if): Likewise.
2013         * include/std/vector (erase, erase_if): Likewise.
2014
2015 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
2016
2017         * include/std/chrono (__detail::__units_suffix_misc): New
2018         helper function.
2019         (__detail::__units_suffix): Likewise.
2020         (chrono::operator<<(basic_ostream&, const duration&)): Define.
2021         * testsuite/20_util/duration/io.cc: New test.
2022
2023 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
2024
2025         * include/Makefile.am: Add new header.
2026         * include/Makefile.in: Regenerate.
2027         * include/std/chrono (duration, time_point, system_clock)
2028         (steady_clock, high_resolution_clock, chrono_literals, sys_time)
2029         (file_clock, file_time): Move to ...
2030         * include/bits/chrono.h: New file.
2031         * include/bits/atomic_futex.h: Include new header instead of
2032         <chrono>.
2033         * include/bits/atomic_timed_wait.h: Likewise.
2034         * include/bits/fs_fwd.h: Likewise.
2035         * include/bits/semaphore_base.h: Likewise.
2036         * include/bits/this_thread_sleep.h: Likewise.
2037         * include/bits/unique_lock.h: Likewise.
2038         * include/experimental/bits/fs_fwd.h: Likewise.
2039         * include/experimental/chrono: Likewise.
2040         * include/experimental/io_context: Likewise.
2041         * include/experimental/netfwd: Likewise.
2042         * include/experimental/timer: Likewise.
2043         * include/std/condition_variable: Likewise.
2044         * include/std/mutex: Likewise.
2045         * include/std/shared_mutex: Likewise.
2046
2047 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
2048
2049         PR libstdc++/102377
2050         * include/bits/atomic_wait.h (__waiter_pool_base:_S_align):
2051         Hardcode to 64 instead of using non-constant constant.
2052
2053 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
2054
2055         * include/bits/erase_if.h (__erase_nodes_if): Remove redundant
2056         __niter_base calls.
2057         * include/std/string (erase, erase_if): Likewise.
2058         * include/std/deque (erase, erase_if): Access non-debug
2059         container directly.
2060         * include/std/map (erase, erase_if): Likewise.
2061         * include/std/set (erase, erase_if): Likewise.
2062         * include/std/unordered_map (erase, erase_if): Likewise.
2063         * include/std/unordered_set (erase, erase_if): Likewise.
2064         * include/std/vector (erase, erase_if): Likewise.
2065         * include/experimental/deque (erase, erase_if): Likewise.
2066         * include/experimental/map (erase, erase_if): Likewise.
2067         * include/experimental/set (erase, erase_if): Likewise.
2068         * include/experimental/unordered_map (erase, erase_if):
2069         Likewise.
2070         * include/experimental/unordered_set (erase, erase_if):
2071         Likewise.
2072         * include/experimental/vector (erase, erase_if): Likewise.
2073
2074 2021-10-06  Jonathan Wakely  <jwakely@redhat.com>
2075
2076         * include/Makefile.am: Add new headers.
2077         * include/Makefile.in: Regenerate.
2078         * include/std/functional: Include <bits/move_only_function.h>.
2079         * include/std/version (__cpp_lib_move_only_function): Define.
2080         * include/bits/mofunc_impl.h: New file.
2081         * include/bits/move_only_function.h: New file.
2082         * testsuite/20_util/move_only_function/call.cc: New test.
2083         * testsuite/20_util/move_only_function/cons.cc: New test.
2084         * testsuite/20_util/move_only_function/move.cc: New test.
2085         * testsuite/20_util/move_only_function/version.cc: New test.
2086
2087 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
2088
2089         * testsuite/21_strings/basic_string_view/requirements/trivially_copyable.cc:
2090         New test.
2091         * testsuite/23_containers/span/trivially_copyable.cc: New test.
2092
2093 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
2094
2095         * include/bits/utility.h (__is_in_place_type_v): Define
2096         variable template to detect in_place_type_t specializations.
2097         (__is_in_place_type): Replace class template with alias
2098         template using __is_in_place_type_v.
2099         * include/std/any (any(T&&)): Check __is_in_place_type first and
2100         avoid instantiating is_copy_constructible unnecessarily.
2101
2102 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
2103
2104         * testsuite/20_util/integer_comparisons/greater.cc: New test.
2105
2106 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
2107
2108         * testsuite/27_io/basic_ostream/inserters_other/char/volatile_ptr.cc:
2109         Check result matches non-volatile pointer.
2110
2111 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
2112
2113         PR c++/102535
2114         * testsuite/20_util/is_trivially_constructible/value.cc: Adjust
2115         expected value for C++20.
2116
2117 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
2118
2119         * include/bits/std_function.h (_Any_data::_M_access): Add
2120         noexcept.
2121         (_Function_base::_Base_manager::_M_get_pointer): Likewise.
2122         (_Function_base::_Base_manager::_M_not_empty_function):
2123         Likewise.
2124
2125 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
2126
2127         * include/std/ostream (operator<<(const volatile void*)):
2128         Add new overload, as per P1147R1.
2129         * testsuite/27_io/basic_ostream/inserters_other/char/volatile_ptr.cc:
2130         New test.
2131
2132 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
2133
2134         * include/bits/stl_queue.h
2135         (__cpp_lib_adaptor_iterator_pair_constructor): Set to correct
2136         value.
2137         * include/bits/stl_stack.h
2138         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
2139         * include/std/version
2140         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
2141         * testsuite/23_containers/queue/cons_from_iters.cc: Update
2142         expected value.
2143         * testsuite/23_containers/stack/cons_from_iters.cc: Likewise.
2144
2145 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
2146
2147         * include/bits/forward_list.h (forward_list): Use non-deduced
2148         context for allocator parameter of allocator-extended copy and
2149         move constructors.
2150         * include/bits/stl_bvector.h (vector<bool>): Likewise.
2151         * include/bits/stl_deque.h (deque): Likewise.
2152         * include/bits/stl_list.h (list): Likewise.
2153         * include/bits/stl_map.h (map): Likewise.
2154         * include/bits/stl_multimap.h (multimap): Likewise.
2155         * include/bits/stl_multiset.h (multiset): Likewise.
2156         * include/bits/stl_set.h (set): Likewise.
2157         * include/bits/stl_vector.h (vector): Likewise.
2158         * include/bits/stl_queue.h (queue, priority_queue): Do not
2159         constrain Allocator template parameter of deduction guides that
2160         have a Container parameter.
2161         * include/bits/stl_stack.h (stack): Likewise.
2162         * include/debug/deque (__gnu_debug::deque): Use non-deduced
2163         context for allocator parameter of allocator-extended copy and
2164         move constructors.
2165         * include/debug/list (__gnu_debug::list): Likewise.
2166         * include/debug/map.h (__gnu_debug::map): Likewise.
2167         * include/debug/multimap.h (__gnu_debug::multimap): Likewise.
2168         * include/debug/multiset.h (__gnu_debug::multiset): Likewise.
2169         * include/debug/set.h (__gnu_debug::set): Likewise.
2170         * include/debug/vector (__gnu_debug::vector): Likewise.
2171         * testsuite/23_containers/deque/cons/deduction.cc: Test class
2172         template argument deduction with non-deduced allocator
2173         arguments.
2174         * testsuite/23_containers/forward_list/cons/deduction.cc:
2175         Likewise.
2176         * testsuite/23_containers/list/cons/deduction.cc: Likewise.
2177         * testsuite/23_containers/map/cons/deduction.cc: Likewise.
2178         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
2179         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
2180         * testsuite/23_containers/priority_queue/deduction.cc: Likewise.
2181         * testsuite/23_containers/queue/deduction.cc: Likewise.
2182         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
2183         * testsuite/23_containers/stack/deduction.cc: Likewise.
2184         * testsuite/23_containers/unordered_map/cons/deduction.cc:
2185         Likewise.
2186         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
2187         Likewise.
2188         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
2189         Likewise.
2190         * testsuite/23_containers/unordered_set/cons/deduction.cc:
2191         Likewise.
2192         * testsuite/23_containers/vector/cons/deduction.cc: Likewise.
2193
2194 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
2195
2196         * include/std/variant (__detail::__variant::__as): Add missing
2197         noexcept to first overload.
2198
2199 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
2200
2201         * include/bits/basic_string.h (basic_string(nullptr_t)): Define
2202         as deleted.
2203         (operator=(nullptr_t)): Likewise.
2204         * include/bits/cow_string.h (basic_string(nullptr_t)): Likewise.
2205         (operator=(nullptr_t)): Likewise.
2206         * include/std/string_view (basic_string_view(nullptr_t)):
2207         Likewise.
2208         * testsuite/21_strings/basic_string/cons/char/nullptr.cc: New test.
2209         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
2210         Change dg-warning to dg-error.
2211         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
2212         Likewise.
2213
2214 2021-10-02  Jonathan Wakely  <jwakely@redhat.com>
2215
2216         * src/c++17/fs_ops.cc (create_directory): Fix typo in enum name.
2217         * src/filesystem/ops-common.h (__last_system_error): Add
2218         explicit cast to avoid narrowing conversion.
2219         (do_space): Fix type in function name.
2220
2221 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2222
2223         PR libstdc++/102100
2224         * include/Makefile.am (c++config.h): Define
2225         _GLIBCXX_VERBOSE_ASSERT based on configure output.
2226         * include/Makefile.in: Regenerate.
2227         * include/bits/c++config: Fix condition for verbose assertions.
2228
2229 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2230
2231         PR libstdc++/92546
2232         * include/bits/erase_if.h (__erase_nodes_if): Use __niter_base to
2233         unwrap debug iterators.
2234         * include/bits/refwrap.h: Do not error if included in C++03.
2235         * include/bits/stl_algo.h (__remove_if): Move to ...
2236         * include/bits/stl_algobase.h (__remove_if): ... here.
2237         * include/std/deque (erase, erase_if): Use __remove_if instead of
2238         remove and remove_if.
2239         * include/std/string (erase, erase_if): Likewise.
2240         * include/std/vector (erase, erase_if): Likewise.
2241
2242 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2243
2244         PR libstdc++/66742
2245         * include/bits/list.tcc (list::sort()): Use _Scratch_list
2246         objects for splicing and merging.
2247         (list::sort(StrictWeakOrdering)): Likewise.
2248         * include/bits/stl_list.h (__detail::_Scratch_list): New type.
2249         * src/c++98/list.cc (_List_node_base::_M_transfer): Add
2250         assertion for --enable-libstdcxx-debug library.
2251         * testsuite/23_containers/list/operations/66742.cc: New test.
2252
2253 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2254
2255         PR libstdc++/100612
2256         * include/std/thread (__pmf_expects_stop_token): New variable
2257         template to detect a pointer to member function that needs a
2258         stop_token to be added to the arguments.
2259         (jthread::__S_create): Use __pmf_expects_stop_token.
2260         (jthread::__S_create_pmf): New function.
2261         * testsuite/30_threads/jthread/100612.cc: New test.
2262
2263 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2264
2265         * include/bits/stl_queue.h
2266         (__cpp_lib_adaptor_iterator_pair_constructor): Define for C++23, as
2267         per P1425R4.
2268         (queue(InputIterator, InputIterator)): Likewise.
2269         (queue(InputIterator, InputIterator, const Alloc&)): Likewise.
2270         * include/bits/stl_stack.h
2271         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
2272         (stack(InputIterator, InputIterator)): Likewise.
2273         (stack(InputIterator, InputIterator, const Alloc&)): Likewise.
2274         * include/std/version (__cpp_lib_adaptor_iterator_pair_constructor):
2275         Define.
2276         * testsuite/23_containers/queue/cons_from_iters.cc: New test.
2277         * testsuite/23_containers/stack/cons_from_iters.cc: New test.
2278
2279 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2280
2281         * include/bits/stl_queue.h (priority_queue): Add
2282         allocator-extended overloads for constructors taking iterator.
2283         * testsuite/23_containers/priority_queue/lwg3506.cc: New test.
2284
2285 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2286
2287         * include/bits/stl_queue.h (priority_queue): Construct sequence
2288         from iterators when no sequence argument is present (LWG 3529).
2289         * testsuite/23_containers/priority_queue/lwg3529.cc: New test.
2290
2291 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2292
2293         * include/bits/stl_queue.h (priority_queue): Constrain
2294         constructors with InputIterator parameters (LWG 3522).
2295         * testsuite/23_containers/priority_queue/lwg3522.cc: New test.
2296
2297 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2298
2299         * include/bits/ranges_base.h (ranges::distance): Split overload
2300         into two (LWG 3392).
2301         * testsuite/24_iterators/range_operations/lwg3392.cc: New test.
2302
2303 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2304
2305         * testsuite/30_threads/thread/cons/3.cc: Remove derivation from
2306         std::unary_function.
2307         * testsuite/30_threads/thread/cons/4.cc: Likewise.
2308         * testsuite/30_threads/thread/cons/5.cc: Likewise.
2309
2310 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2311
2312         * testsuite/ext/pb_ds/example/basic_multimap.cc: Remove
2313         unnecesary derivation from std::unary_function.
2314         * testsuite/ext/pb_ds/example/erase_if.cc: Likewise.
2315         * testsuite/ext/pb_ds/example/hash_illegal_resize.cc: Likewise.
2316         * testsuite/ext/pb_ds/example/hash_initial_size.cc: Likewise.
2317         * testsuite/ext/pb_ds/example/hash_load_set_change.cc: Likewise.
2318         * testsuite/ext/pb_ds/example/hash_mod.cc: Likewise.
2319         * testsuite/ext/pb_ds/example/hash_resize.cc: Likewise.
2320         * testsuite/ext/pb_ds/example/hash_shift_mask.cc: Likewise.
2321         * testsuite/ext/pb_ds/example/priority_queue_dijkstra.cc:
2322         Likewise.
2323         * testsuite/ext/pb_ds/example/ranged_hash.cc: Likewise.
2324         * testsuite/ext/pb_ds/example/store_hash.cc: Likewise.
2325
2326 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2327
2328         * src/c++11/functexcept.cc (__throw_out_of_range_fmt): Do not
2329         expand the format string for freestanding, or non-vebose, or if
2330         we're just going to abort anyway.
2331         * src/c++11/snprintf_lite.cc: Remove unused header and
2332         declaration.
2333
2334 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2335
2336         * include/std/variant (__do_visit): Use variant_npos instead of
2337         literal -1 that requires a narrowing conversion.
2338
2339 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2340
2341         PR libstdc++/99327
2342         * src/filesystem/ops-common.h (__unsupported): New function to
2343         return a suitable error code for missing functionality.
2344         (posix::off_t): New typedef.
2345         (posix::*): Set errno to ENOSYS instead of ENOTSUP for no-op
2346         fallback implementations.
2347         (do_copy_file): Replace uses of errc::not_supported.
2348         * src/c++17/fs_ops.cc (fs::copy, fs::copy_file, create_dir)
2349         (fs::create_directory, fs::create_directory_symlink)
2350         (fs::create_hard_link, fs::create_symlink, fs::current_path)
2351         (fs::equivalent, do_stat, fs::file_size, fs::hard_link_count)
2352         (fs::last_write_time, fs::permissions, fs::read_symlink):
2353         Replace uses of errc::not_supported.
2354         (fs::resize_file): Qualify off_t.
2355         * src/filesystem/ops.cc (fs::copy, fs::copy_file, create_dir)
2356         (fs::create_directory, fs::create_directory_symlink)
2357         (fs::create_hard_link, fs::create_symlink, fs::current_path)
2358         (fs::equivalent, do_stat, fs::file_size, fs::last_write_time)
2359         (fs::permissions, fs::read_symlink, fs::system_complete):
2360         Replace uses of errc::not_supported.
2361         (fs::resize_file): Qualify off_t and enable unconditionally.
2362         * testsuite/19_diagnostics/system_error/cons-1.cc: Likewise.
2363
2364 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2365
2366         * src/filesystem/ops-common.h (last_error): New helper function.
2367         (filesystem::do_space): Use last_error().
2368         * src/c++17/fs_ops.cc (fs::absolute, fs::create_hard_link)
2369         (fs::equivalent, fs::remove, fs::temp_directory_path): Use
2370         last_error().
2371         * src/filesystem/ops.cc (fs::create_hard_link)
2372         (fs::remove, fs::temp_directory_path): Likewise.
2373
2374 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2375
2376         * include/std/type_traits (__conditional): New class template
2377         for internal uses of std::conditional.
2378         (__conditional_t): New alias template to replace conditional_t.
2379         (__and_, __or_, __result_of_memfun, __result_of_memobj): Use
2380         __conditional_t instead of conditional::type.
2381         * include/bits/atomic_base.h (__atomic_impl::_Diff): Likewise.
2382         * include/bits/hashtable.h (_Hashtable): Likewise.
2383         * include/bits/hashtable_policy.h (_Node_iterator, _Insert_base)
2384         (_Local_iterator): Likewise. Replace typedefs with
2385         using-declarations.
2386         * include/bits/move.h (move_if_noexcept): Use __conditional_t.
2387         * include/bits/parse_numbers.h (_Select_int_base): Likewise.
2388         * include/bits/ptr_traits.h (__make_not_void): Likewise.
2389         * include/bits/ranges_algobase.h (__copy_or_move_backward)
2390         (__copy_or_move): Likewise.
2391         * include/bits/ranges_base.h (borrowed_iterator_t): Likewise.
2392         * include/bits/ranges_util.h (borrowed_subrange_t): Likewise.
2393         * include/bits/regex_compiler.h (_BracketMatcher): Use
2394         __conditional_t. Replace typedefs with using-declarations.
2395         * include/bits/shared_ptr_base.h (__shared_count): Use
2396         __conditional_t.
2397         * include/bits/stl_algobase.h (__copy_move, __copy_move_backward):
2398         Likewise.
2399         * include/bits/stl_iterator.h (__detail::__clamp_iter_cat)
2400         (reverse_iterator::iterator_concept)
2401         (__make_move_if_noexcept_iterator)
2402         (iterator_traits<common_iterator<_It, _Sent>>)
2403         (iterator_traits<counted_iterator<_It>>): Likewise.
2404         * include/bits/stl_pair.h (_PCC, pair::operator=): Likewise.
2405         * include/bits/stl_tree.h (_Rb_tree::insert_return_type)
2406         (_Rb_tree::_M_clone_node): Likewise.
2407         * include/bits/unique_ptr.h (unique_ptr(unique_ptr<U,E>&&)):
2408         Likewise.
2409         * include/bits/uses_allocator.h (__uses_alloc): Likewise.
2410         (__is_uses_allocator_predicate): Likewise.
2411         * include/debug/functions.h (__foreign_iterator_aux2): Likewise.
2412         * include/experimental/any (any::_Manager, __any_caster):
2413         Likewise.
2414         * include/experimental/executor (async_completion): Likewise.
2415         * include/experimental/functional (__boyer_moore_base_t):
2416         Likewise.
2417         * include/std/any (any::_Manager): Likewise.
2418         * include/std/functional (__boyer_moore_base_t): Likewise.
2419         * include/std/ranges (borrowed_iterator_t)
2420         (borrowed_subrange_t, __detail::__maybe_present_t)
2421         (__detail::__maybe_const_t, split_view): Likewise.
2422         * include/std/tuple (__empty_not_final, tuple::operator=):
2423         Likewise.
2424         * include/std/variant (__detail::__variant::__get_t): Likewise.
2425
2426 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2427
2428         PR libstdc++/78113
2429         * include/std/variant (__do_visit): Use a switch when we have a
2430         single variant with a small number of alternatives.
2431
2432 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2433
2434         PR libstdc++/90943
2435         * include/std/variant (__cpp_lib_variant): Update value.
2436         (__detail::__variant::__as): New helpers implementing the
2437         as-variant exposition-only function templates.
2438         (visit, visit<R>): Use __as to upcast the variant parameters.
2439         * include/std/version (__cpp_lib_variant): Update value.
2440         * testsuite/20_util/variant/visit_inherited.cc: New test.
2441
2442 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2443
2444         * include/bits/stl_iterator.h (__normal_iterator): Simplify
2445         converting constructor and do not require _Container::pointer.
2446
2447 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2448
2449         * include/bits/cow_string.h [_GLIBCXX_FULLY_DYNAMIC_STRING]
2450         (basic_string(basic_string&&)): Add noexcept and avoid
2451         allocation, by sharing rep with the rvalue string.
2452
2453 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2454
2455         * include/bits/stl_iterator.h (common_iterator::__arrow_proxy)
2456         (common_iterator::__postfix_proxy): Add noexcept.
2457
2458 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2459
2460         PR libstdc++/94418
2461         * include/bits/stl_iterator.h (reverse_iterator): Use
2462         conditional noexcept on constructors and assignment operators.
2463         * testsuite/24_iterators/reverse_iterator/noexcept.cc: New test.
2464
2465 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2466
2467         PR libstdc++/100153
2468         * include/bits/vector.tcc (vector<bool>::_M_shrink_to_fit()):
2469         When size() is zero just deallocate and reset.
2470
2471 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2472
2473         PR libstdc++/96733
2474         * include/bits/stl_algo.h (clamp): Use std::min and std::max.
2475
2476 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2477
2478         * include/bits/regex.h (basic_regex::multiline): Define for
2479         non-strict C++11 and C++14 modes.
2480         * include/bits/regex_constants.h (regex_constants::multiline):
2481         Add _GLIBCXX_RESOLVE_LIB_DEFECTS comment.
2482
2483 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2484
2485         * testsuite/25_algorithms/is_permutation/2.cc: Include <iterator>.
2486
2487 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2488
2489         * include/bits/stream_iterator.h (istream_iterator): Add
2490         noexcept to constructors and non-throwing member functions and
2491         friend functions.
2492         (ostream_iterator): Likewise.
2493
2494 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2495
2496         * include/bits/boost_concept_check.h (_Is_vector_bool_iterator):
2497         New trait to identify vector<bool> iterators, including debug
2498         ones.
2499         (_ForwardIteratorReferenceConcept): Add default template
2500         argument using _Is_vector_bool_iterator and use it in partial
2501         specialization for the vector<bool> cases.
2502         (_Mutable_ForwardIteratorReferenceConcept): Likewise.
2503         * testsuite/24_iterators/operations/prev_neg.cc: Adjust dg-error
2504         line number.
2505
2506 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2507
2508         * include/bits/list.tcc (list::merge): Remove call to size() and
2509         try-catch block. Use _Finalize_merge instead.
2510         * include/bits/stl_list.h (list::_Finalize_merge): New
2511         scope guard type to update _M_size members after a merge.
2512
2513 2021-09-30  Jonathan Wakely  <jwakely@redhat.com>
2514
2515         * include/bits/regex.h (basic_regex::multiline): Fix #if
2516         condition.
2517
2518 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
2519
2520         * include/bits/regex.h (basic_regex::multiline): Define constant
2521         for C++17.
2522         * include/bits/regex_constants.h (regex_constants::multiline):
2523         Define constant for C++17.
2524         (regex_constants::__multiline): Define duplicate constant for
2525         internal use in C++11 and C++14.
2526         * include/bits/regex_executor.h (_Executor::_M_match_multiline()):
2527         New member function.
2528         (_Executor::_M_is_line_terminator(_CharT)): New member function.
2529         (_Executor::_M_at_begin(), _Executor::_M_at_end()): Use new
2530         member functions to support multiline matches.
2531         * testsuite/28_regex/algorithms/regex_match/multiline.cc: New test.
2532
2533 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
2534
2535         * include/bits/regex_compiler.h (_Compiler::_S_validate): New
2536         function.
2537         * include/bits/regex_compiler.tcc (_Compiler::_Compiler): Use
2538         _S_validate to check flags.
2539         * include/bits/regex_error.h (_S_grammar): New error code for
2540         internal use.
2541         * testsuite/28_regex/basic_regex/ctors/grammar.cc: New test.
2542
2543 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
2544
2545         PR libstdc++/84110
2546         * include/bits/regex_error.h (regex_constants::_S_null): New
2547         error code for internal use.
2548         * include/bits/regex_scanner.tcc (_Scanner::_M_scan_normal()):
2549         Check for null character.
2550         * testsuite/28_regex/basic_regex/84110.cc: New test.
2551
2552 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
2553
2554         * include/bits/regex.h (__detail::__is_contiguous_iter): Move
2555         here from <bits/regex_compiler.h>.
2556         (basic_regex::_M_compile): New function to compile an NFA from
2557         a regular expression string.
2558         (basic_regex::basic_regex): Use _M_compile instead of delegating
2559         to other constructors.
2560         (basic_regex::operator=(const basic_regex&)): Define as
2561         defaulted.
2562         (basic_regex::operator=(initializer_list<C>)): Use _M_compile.
2563         (basic_regex::assign(const basic_regex&)): Use copy assignment.
2564         (basic_regex::assign(basic_regex&&)): Use move assignment.
2565         (basic_regex::assign(const C*, flag_type)): Use _M_compile
2566         instead of constructing a temporary string.
2567         (basic_regex::assign(const C*, size_t, flag_type)): Likewise.
2568         (basic_regex::assign(const basic_string<C,T,A>&, flag_type)):
2569         Use _M_compile instead of constructing a temporary basic_regex.
2570         (basic_regex::assign(InputIter, InputIter, flag_type)): Avoid
2571         constructing a temporary string for contiguous iterators of the
2572         right value type.
2573         * include/bits/regex_compiler.h (__is_contiguous_iter): Move to
2574         <bits/regex.h>.
2575         (__enable_if_contiguous_iter, __disable_if_contiguous_iter)
2576         (__compile_nfa): Remove.
2577         * testsuite/28_regex/basic_regex/assign/exception_safety.cc: New
2578         test.
2579         * testsuite/28_regex/basic_regex/ctors/char/other.cc: New test.
2580
2581 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2582
2583         * include/bits/atomic_timed_wait.h (__platform_wait_until_impl):
2584         Return false for ETIMEDOUT and true otherwise.
2585
2586 2021-09-28  François Dumont  <fdumont@gcc.gnu.org>
2587
2588         * testsuite/20_util/default_delete/48631_neg.cc: Adapt dg-prune-output message
2589         to also match message with '__8' in it.
2590
2591 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2592
2593         * include/bits/regex_automaton.h (_NFA_base::_SizeT): Remove.
2594         * include/bits/regex_compiler.h (_Compiler::_IterT): Remove.
2595         * include/bits/regex_compiler.tcc: Likewise.
2596         * include/bits/regex_scanner.h (_Scanner::_IterT): Remove.
2597         * include/bits/regex_scanner.tcc: Likewise.
2598
2599 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2600
2601         * include/bits/regex_compiler.tcc: Add line break in empty while
2602         statement.
2603         * include/bits/regex_executor.tcc: Avoid unused parameter
2604         warning.
2605
2606 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2607
2608         * include/bits/regex.h (basic_regex, swap): Add noexcept to
2609         non-throwing functions.
2610         * include/bits/regex_automaton.h (_State_base, _State)
2611         (_NFA_base): Likewise.
2612         * include/bits/regex_compiler.h (_Compiler): Likewise.
2613         * include/bits/regex_error.h (regex_error::code()): Likewise.
2614         * include/bits/regex_scanner.h (_Scanner): Likewise.
2615
2616 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2617
2618         * include/bits/atomic_wait.h (_GLIBCXX_HAVE_PLATFORM_WAIT):
2619         Define before first attempt to check it.
2620
2621 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2622
2623         * testsuite/23_containers/priority_queue/requirements/explicit_instantiation/1.cc:
2624         Do not check non-default constructible sequences when
2625         _GLIBCXX_CONCEPT_CHECKS is defined.
2626         * testsuite/23_containers/priority_queue/requirements/explicit_instantiation/1_c++98.cc:
2627         Likewise.
2628         * testsuite/23_containers/queue/requirements/explicit_instantiation/1.cc:
2629         Likewise.
2630         * testsuite/23_containers/queue/requirements/explicit_instantiation/1_c++98.cc:
2631         Likewise.
2632         * testsuite/23_containers/stack/requirements/explicit_instantiation/1.cc:
2633         Likewise.
2634         * testsuite/23_containers/stack/requirements/explicit_instantiation/1_c++98.cc:
2635         Likewise.
2636
2637 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2638
2639         * testsuite/23_containers/deque/requirements/explicit_instantiation/3.cc:
2640         Do not test implicit allocator rebinding when _GLIBCXX_CONCEPT_CHECKS
2641         is defined.
2642         * testsuite/23_containers/forward_list/requirements/explicit_instantiation/3.cc:
2643         Likewise.
2644         * testsuite/23_containers/list/requirements/explicit_instantiation/3.cc:
2645         Likewise.
2646         * testsuite/23_containers/list/requirements/explicit_instantiation/5.cc:
2647         Likewise.
2648         * testsuite/23_containers/map/requirements/explicit_instantiation/3.cc:
2649         Likewise.
2650         * testsuite/23_containers/map/requirements/explicit_instantiation/5.cc:
2651         Likewise.
2652         * testsuite/23_containers/multimap/requirements/explicit_instantiation/3.cc:
2653         Likewise.
2654         * testsuite/23_containers/multimap/requirements/explicit_instantiation/5.cc:
2655         Likewise.
2656         * testsuite/23_containers/multiset/requirements/explicit_instantiation/3.cc:
2657         Likewise.
2658         * testsuite/23_containers/multiset/requirements/explicit_instantiation/5.cc:
2659         Likewise.
2660         * testsuite/23_containers/set/requirements/explicit_instantiation/3.cc:
2661         Likewise.
2662         * testsuite/23_containers/set/requirements/explicit_instantiation/5.cc:
2663         Likewise.
2664         * testsuite/23_containers/unordered_map/requirements/explicit_instantiation/3.cc:
2665         Likewise.
2666         * testsuite/23_containers/unordered_multimap/requirements/explicit_instantiation/3.cc:
2667         Likewise.
2668         * testsuite/23_containers/unordered_multiset/requirements/explicit_instantiation/3.cc:
2669         Likewise.
2670         * testsuite/23_containers/unordered_set/requirements/explicit_instantiation/3.cc:
2671         Likewise.
2672         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/3.cc:
2673         Likewise.
2674         * testsuite/23_containers/vector/requirements/explicit_instantiation/3.cc:
2675         Likewise.
2676
2677 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2678
2679         * include/bits/boost_concept_check.h (_ForwardIteratorConcept)
2680         (_BidirectionalIteratorConcept, _RandomAccessIteratorConcept):
2681         Check result types of iterator operations.
2682         (_Mutable_ForwardIteratorConcept): Check that iterator's
2683         reference type is a reference to its value type.
2684         (_Mutable_BidirectionalIteratorConcept): Do not require the
2685         value type to be assignable.
2686         (_Mutable_RandomAccessIteratorConcept): Likewise.
2687         * testsuite/24_iterators/operations/prev_neg.cc: Adjust dg-error
2688         line number.
2689
2690 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2691
2692         * testsuite/25_algorithms/copy/34595.cc: Add missing operation
2693         for type used as an iterator.
2694         * testsuite/25_algorithms/unique_copy/check_type.cc: Likewise.
2695
2696 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2697
2698         * testsuite/20_util/is_nothrow_swappable/value.h: Use custom
2699         comparison function for priority_queue of type with no
2700         relational operators.
2701         * testsuite/20_util/is_swappable/value.h: Likewise.
2702         * testsuite/24_iterators/output/concept.cc: Add operator< to
2703         type used in set.
2704
2705 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2706
2707         * include/bits/boost_concept_check.h (_OutputIteratorConcept):
2708         Use a function to preserve value category of the type.
2709         * include/bits/stl_algobase.h (copy, move, fill_n): Use a
2710         reference as the second argument for _OutputIteratorConcept.
2711         (copy_backward, move_backward): Use _OutputIteratorConcept
2712         instead of _ConvertibleConcept.
2713
2714 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2715
2716         * include/bits/stl_iterator.h (pointer_traits): Define partial
2717         specialization for __normal_iterator.
2718         * testsuite/24_iterators/normal_iterator/to_address.cc: New test.
2719
2720 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2721
2722         * include/bits/move.h (forward(remove_reference_t<T>&&)):
2723         Improve text of static_assert.
2724         * testsuite/20_util/forward/c_neg.cc: Adjust dg-error.
2725         * testsuite/20_util/forward/f_neg.cc: Likewise.
2726
2727 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2728
2729         PR libstdc++/102499
2730         * include/bits/fs_path.h (path::begin, path::end): Add noexcept
2731         to declarations, to match definitions.
2732
2733 2021-09-24  Jonathan Wakely  <jwakely@redhat.com>
2734
2735         * include/bits/range_access.h (cbegin, cend): Remove redundant
2736         'inline' specifier.
2737
2738 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
2739
2740         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
2741         Remove dg-error lines for C++20-only errors.
2742
2743 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
2744
2745         * testsuite/19_diagnostics/headers/system_error/93151.cc:
2746         Disable PCH.
2747
2748 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
2749
2750         * src/c++11/system_error.cc (system_error_category) [_WIN32]:
2751         Map Windows error codes to generic POSIX error numbers. Use
2752         FormatMessage instead of strerror.
2753         * testsuite/19_diagnostics/error_category/system_category.cc:
2754         Adjust for new behaviour on Windows.
2755
2756 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
2757
2758         * src/c++11/system_error.cc (generic_error_category): Define
2759         class and virtual functions as 'final'.
2760         (generic_error_category::equivalent(int, const error_condition&)):
2761         Override.
2762         (system_error_category): Define class and virtual functions as
2763         'final'.
2764         (system_error_category::equivalent(int, const error_condition&)):
2765         Override.
2766         (generic_category_instance, system_category_instance): Use
2767         constinit union to make the objects immortal.
2768
2769 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
2770
2771         PR libstdc++/102425
2772         * src/c++11/system_error.cc
2773         (system_error_category::default_error_condition): Add 0 to
2774         switch.
2775         * testsuite/19_diagnostics/error_category/102425.cc: New test.
2776
2777 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
2778
2779         * include/bits/fs_path.h (path::iterator): Add noexcept to all
2780         member functions and friend functions.
2781         (distance): Add noexcept.
2782         (advance): Add noexcept and inline.
2783         * include/experimental/bits/fs_path.h (path::iterator):
2784         Add noexcept to all member functions.
2785
2786 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
2787
2788         PR libstdc++/102270
2789         * include/std/tuple (_Tuple_impl): Add constexpr to constructor
2790         missed in previous patch.
2791         * testsuite/20_util/tuple/cons/102270.C: Moved to...
2792         * testsuite/20_util/tuple/cons/102270.cc: ...here.
2793         * testsuite/util/testsuite_allocator.h (SimpleAllocator): Add
2794         constexpr to constructor so it can be used for C++20 tests.
2795
2796 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
2797
2798         * testsuite/26_numerics/valarray/dr630-3.C: Moved to...
2799         * testsuite/26_numerics/valarray/dr630-3.cc: ...here.
2800         * testsuite/27_io/basic_iostream/cons/16251.C: Moved to...
2801         * testsuite/27_io/basic_iostream/cons/16251.cc: ...here.
2802
2803 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2804
2805         * src/Makefile.am (stamp-debug): Add all Makefiles as
2806         prerequisites.
2807         * src/Makefile.in: Regenerate.
2808
2809 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2810
2811         * testsuite/ext/pb_ds/regression/tree_map_rand.cc: Increase
2812         timeout factor to 3.
2813         * testsuite/ext/pb_ds/regression/tree_set_rand.cc: Likewise.
2814
2815 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2816
2817         * doc/xml/manual/using.xml: Generalize to apply to more than
2818         just -std=c++11.
2819         * doc/html/manual/using_macros.html: Regenerate.
2820
2821 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2822
2823         * include/std/optional (nullptr_t): Make constructor noexcept.
2824
2825 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2826
2827         * include/bits/fs_path.h (advance): Remove non-deducible
2828         template parameter.
2829
2830 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2831
2832         PR libstdc++/102270
2833         * include/std/tuple (_Head_base, _Tuple_impl): Add
2834         _GLIBCXX20_CONSTEXPR to allocator-extended constructors.
2835         (tuple<>::swap(tuple&)): Add _GLIBCXX20_CONSTEXPR.
2836         * testsuite/20_util/tuple/cons/102270.C: New test.
2837
2838 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2839
2840         PR libstdc++/102280
2841         * include/std/span (span(Range&&)): Add constraint to deduction
2842         guide.
2843
2844 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2845
2846         * src/c++98/Makefile.am: Use CXXCOMPILE not LTCXXCOMPILE.
2847         * src/c++98/Makefile.in: Regenerate.
2848
2849 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2850
2851         * include/bits/basic_string.h [_GLIBCXX_USE_CXX11_ABI]
2852         (to_string): Add noexcept if the type width is 32 bits or less.
2853
2854 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2855
2856         * include/bits/unique_ptr.h (__uniq_ptr_impl::_M_ptr)
2857         (__uniq_ptr_impl::_M_deleter): Add noexcept.
2858
2859 2021-09-16  Thomas Rodgers  <rodgert@twrodgers.com>
2860
2861         PR libstdc++/101761
2862         * testsuite/29_atomics/atomic_ref/wait_notify.cc (test): Use
2863         va and vb as arguments to wait/notify, remove unused bb local.
2864
2865 2021-09-15  Hugo Beauzée-Luyssen  <hugo@beauzee.fr>
2866
2867         * crossconfig.m4: Check for TLS support on mingw.
2868         * configure: Regenerate.
2869
2870 2021-09-13  Jason Merrill  <jason@redhat.com>
2871
2872         * include/std/version: Define __cpp_lib_hardware_interference_size.
2873         * libsupc++/new: Define hardware interference size variables.
2874
2875 2021-09-10  Jonathan Wakely  <jwakely@redhat.com>
2876
2877         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
2878         Fix invalid hostname to only match the .invalid TLD.
2879
2880 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
2881
2882         * include/bits/atomic_base.h (__atomic_base<P*>::compare_exchange_weak):
2883         Add new functions.
2884         * include/std/atomic (atomic<T*>::compare_exchange_weak): Use
2885         it.
2886
2887 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
2888
2889         * include/std/atomic: Tweak whitespace.
2890
2891 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
2892
2893         PR c++/102177
2894         * include/bits/atomic_base.h (__is_valid_cmpexch_failure_order):
2895         New function to check if a memory order is valid for the failure
2896         case of compare exchange operations.
2897         (__atomic_base<I>::compare_exchange_weak): Simplify assertions
2898         by using __is_valid_cmpexch_failure_order.
2899         (__atomic_base<I>::compare_exchange_strong): Likewise.
2900         (__atomic_base<P*>::compare_exchange_weak): Likewise.
2901         (__atomic_base<P*>::compare_exchange_strong): Likewise.
2902         (__atomic_impl::compare_exchange_weak): Add assertion.
2903         (__atomic_impl::compare_exchange_strong): Likewise.
2904         * include/std/atomic (atomic::compare_exchange_weak): Likewise.
2905         (atomic::compare_exchange_strong): Likewise.
2906
2907 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
2908
2909         * include/std/functional (invoke_r): Define.
2910         * include/std/version (__cpp_lib_invoke_r): Define.
2911         * testsuite/20_util/function_objects/invoke/version.cc: Check
2912         for __cpp_lib_invoke_r as well as __cpp_lib_invoke.
2913         * testsuite/20_util/function_objects/invoke/4.cc: New test.
2914
2915 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2916
2917         PR libstdc++/98421
2918         * include/std/span (span(Iter, size_type), span(Iter, Iter)):
2919         Add valid range checks.
2920         * testsuite/23_containers/span/cons_1_assert_neg.cc: New test.
2921         * testsuite/23_containers/span/cons_2_assert_neg.cc: New test.
2922
2923 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2924
2925         * configure.ac: Fix checks for F_GETFL, F_SETFL and O_NONBLOCK.
2926         * configure: Regenerate.
2927
2928 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2929
2930         * src/c++11/system_error.cc (error_category::~error_category()):
2931         Remove noexcept-specifier.
2932         (system_error::~system_error()): Likewise.
2933         * testsuite/19_diagnostics/error_category/noexcept.cc: New test.
2934         * testsuite/19_diagnostics/system_error/noexcept.cc: New test.
2935
2936 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2937
2938         PR libstdc++/102074
2939         * include/bits/atomic_timed_wait.h (__timed_waiter_pool)
2940         [!_GLIBCXX_HAVE_PLATFORM_TIMED_WAIT]: Add missing return.
2941
2942 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2943
2944         * include/experimental/internet (__make_resolver_error_code):
2945         Handle EAI_SYSTEM errors.
2946         (basic_resolver_results): Use __make_resolver_error_code. Use
2947         Glibc NI_MAXHOST and NI_MAXSERV values for buffer sizes.
2948
2949 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2950
2951         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
2952         Try other service if "http" fails.
2953
2954 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2955
2956         * testsuite/17_intro/names.cc: Undefine some more names used
2957         by Solaris system headers.
2958
2959 2021-08-30  Jason Merrill  <jason@redhat.com>
2960
2961         PR c++/96286
2962         * testsuite/30_threads/promise/requirements/lwg3466.cc:
2963         Remove dg-prune-outputs.
2964
2965 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
2966
2967         * include/bits/alloc_traits.h (allocator_traits): Add explicit
2968         specialization for allocator<void>. Improve doxygen comments.
2969         * include/bits/allocator.h (allocator<void>): Restore for the
2970         versioned namespace.
2971         (allocator<void>::construct, allocator<void>::destroy): Remove.
2972         * include/ext/extptr_allocator.h (_Extptr_allocator<void>):
2973         Add default constructor and converting constructor.
2974
2975 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
2976
2977         * include/bits/stl_uninitialized.h: Fix typo in comment.
2978
2979 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
2980
2981         PR libstdc++/99876
2982         * src/c++17/fs_ops.cc (fs::absolute): Call non-throwing form,
2983         to avoid unnecessary current_path() call.
2984
2985 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
2986
2987         * include/bits/std_function.h (function::function(F&&)): Give
2988         name to defaulted template parameter, to improve diagnostics.
2989         Use markdown for more doxygen comments.
2990
2991 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
2992
2993         * include/bits/std_function.h (function): Adjust doxygen
2994         comments.
2995         * include/bits/unique_ptr.h (make_unique_for_overwrite):
2996         Change parameter name to match doxygen comment.
2997
2998 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
2999
3000         * include/bits/std_function.h (_function_base::_Base_manager):
3001         Replace _M_init_functor with a function template using a
3002         forwarding reference, and a pair of _M_create function
3003         templates. Reuse _M_create for the clone operation.
3004         (function::_Decay_t): New alias template.
3005         (function::_Callable): Simplify by using _Decay.
3006         (function::function(F)): Change parameter to forwarding
3007         reference, as per LWG 2447. Add noexcept-specifier. Simplify
3008         constraints.
3009         (function::operator=(F&&)): Add noexcept-specifier.
3010         * testsuite/20_util/function/cons/lwg2774.cc: New test.
3011         * testsuite/20_util/function/cons/noexcept.cc: New test.
3012
3013 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
3014
3015         * include/bits/std_function.h (function::function(F)): Add
3016         static assertions to check constructibility requirements.
3017
3018 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
3019
3020         PR libstdc++/100285
3021         * configure.ac: Check for O_NONBLOCK.
3022         * configure: Regenerate.
3023         * include/experimental/internet: Include <ws2tcpip.h> for
3024         Windows.  Use preprocessor conditions around more constants.
3025         * include/experimental/socket: Use preprocessor conditions
3026         around more constants.
3027         * testsuite/experimental/net/internet/resolver/base.cc: Only use
3028         constants when the corresponding C macro is defined.
3029         * testsuite/experimental/net/socket/basic_socket.cc: Likewise.
3030         * testsuite/experimental/net/socket/socket_base.cc: Likewise.
3031         Make preprocessor checks more fine-grained.
3032
3033 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
3034
3035         * testsuite/17_intro/names.cc: Check 'sz'.
3036
3037 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
3038
3039         * testsuite/17_intro/names.cc: Adjust for Windows.
3040
3041 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
3042
3043         * include/std/valarray: Uglify 'func' parameters.
3044         * testsuite/17_intro/names.cc: Add 'func' to checks.
3045
3046 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
3047
3048         PR libstdc++/102064
3049         * include/bits/stl_uninitialized.h (_GLIBCXX_USE_ASSIGN_FOR_INIT):
3050         Define macro to check conditions for optimizing trivial cases.
3051         (__check_constructible): New function to do static assert.
3052         (uninitialized_copy, uninitialized_fill, uninitialized_fill_n):
3053         Use new macro.
3054         * testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
3055         Adjust dg-error pattern.
3056         * testsuite/23_containers/vector/cons/89164.cc: Likewise. Add
3057         C++17-specific checks from 89164_c++17.cc.
3058         * testsuite/23_containers/vector/cons/89164_c++17.cc: Removed.
3059         * testsuite/20_util/specialized_algorithms/uninitialized_copy/102064.cc:
3060         New test.
3061         * testsuite/20_util/specialized_algorithms/uninitialized_copy_n/102064.cc:
3062         New test.
3063         * testsuite/20_util/specialized_algorithms/uninitialized_fill/102064.cc:
3064         New test.
3065         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/102064.cc:
3066         New test.
3067
3068 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
3069
3070         PR libstdc++/102048
3071         * include/ext/rope (rope::erase(size_type)): Remove broken
3072         function.
3073
3074 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
3075
3076         * doc/xml/manual/status_cxx2020.xml: Update table.
3077         * doc/html/manual/status.html: Regenerate.
3078
3079 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
3080
3081         * include/std/type_traits (is_layout_compatible): Define.
3082         (is_corresponding_member): Define.
3083         * include/std/version (__cpp_lib_is_layout_compatible): Define.
3084         * testsuite/20_util/is_layout_compatible/is_corresponding_member.cc:
3085         New test.
3086         * testsuite/20_util/is_layout_compatible/value.cc: New test.
3087         * testsuite/20_util/is_layout_compatible/version.cc: New test.
3088         * testsuite/20_util/is_pointer_interconvertible/with_class.cc:
3089         New test.
3090         * testsuite/23_containers/span/layout_compat.cc: Do not use real
3091         std::is_layout_compatible trait if available.
3092
3093 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
3094
3095         * src/c++11/cxx11-shim_facets.cc: Fix mismatched class-key in
3096         explicit instantiation definitions.
3097
3098 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
3099
3100         * include/std/ranges (basic_istream_view): Add default template
3101         argument.
3102         * testsuite/std/ranges/istream_view.cc: Check it.
3103
3104 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
3105
3106         * libsupc++/dyncast.cc (__dynamic_cast): Add __builtin_expect to
3107         precondition check.
3108
3109 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
3110
3111         PR libstdc++/90787
3112         * testsuite/util/testsuite_fs.h (permissions_are_testable):
3113         Define as inline.
3114
3115 2021-08-20  Jonathan Wakely  <jwakely@redhat.com>
3116
3117         PR libstdc++/90787
3118         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
3119         Use new __gnu_test::permissions_are_testable() function.
3120         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
3121         Likewise.
3122         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
3123         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
3124         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
3125         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
3126         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
3127         * testsuite/27_io/filesystem/operations/symlink_status.cc:
3128         Likewise.
3129         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
3130         Likewise.
3131         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
3132         Likewise.
3133         * testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc:
3134         Likewise.
3135         * testsuite/experimental/filesystem/operations/exists.cc:
3136         Likewise.
3137         * testsuite/experimental/filesystem/operations/is_empty.cc:
3138         Likewise.
3139         * testsuite/experimental/filesystem/operations/remove.cc:
3140         Likewise.
3141         * testsuite/experimental/filesystem/operations/remove_all.cc:
3142         Likewise.
3143         * testsuite/experimental/filesystem/operations/temp_directory_path.cc:
3144         Likewise.
3145         * testsuite/util/testsuite_fs.h (__gnu_test::permissions_are_testable):
3146         New function to guess whether testing permissions will work.
3147
3148 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
3149
3150         * doc/xml/manual/status_cxx2020.xml: Move row  earlier in table.
3151         * doc/html/manual/status.html: Regenerate.
3152
3153 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
3154
3155         * doc/doxygen/user.cfg.in: Update to Doxygen 1.9.2
3156
3157 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
3158
3159         PR libstdc++/101965
3160         * include/std/charconv (__to_chars_i): Remove redundant check.
3161
3162 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
3163
3164         PR libstdc++/101960
3165         * include/std/tuple (_Tuple_impl(_Tuple_impl&&)): Use base
3166         class' move constructor. Define as defaulted for versioned
3167         namespace.
3168         * testsuite/20_util/tuple/cons/101960.cc: New test.
3169
3170 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
3171
3172         PR libstdc++/100139
3173         * doc/xml/manual/status_cxx2020.xml: Add P1739R4 to status table.
3174         * doc/html/manual/status.html: Regenerate.
3175
3176 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
3177
3178         * include/bits/shared_ptr.h: Add @since and @headerfile tags.
3179         * include/bits/unique_ptr.h: Add @headerfile tags.
3180
3181 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
3182
3183         * src/filesystem/ops-common.h (filesystem::file_time): Improve
3184         overflow check by using system_clock::duration::max().
3185
3186 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
3187
3188         * include/bits/stl_tree.h: Tweak whitespace.
3189
3190 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
3191
3192         * include/bits/unique_ptr.h (default_delete): Add @since tag.
3193         (unique_ptr, unique_ptr<T[]>): Likewise. Improve @brief.
3194         (make_unique, make_unique_for_overwrite): Likewise. Add @tparam,
3195         @param, and @returns.
3196         (_MakeUniq): Move to __detail namespace. Add alias template
3197         helpers.
3198
3199 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
3200
3201         * include/bits/stl_function.h: Improve doxygen comments.
3202
3203 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
3204
3205         * doc/doxygen/user.cfg.in (PREDEFINED): Enable doxygen
3206         processing for C++20 components and components that depend on
3207         compiler features.
3208         * include/bits/stl_algo.h (random_shuffle): Use @deprecated.
3209         * include/std/type_traits: Improve doxygen comments for C++20
3210         traits.
3211
3212 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
3213
3214         * include/ext/type_traits.h (__promote_2, __promote_3)
3215         (__promote_4): Redfine as alias templates using __promoted_t.
3216         * include/std/complex (__promote_2): Remove partial
3217         specializations for std::complex.
3218
3219 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
3220
3221         * include/bits/stl_algo.h (min(initializer_list<T>))
3222         (min(initializer_list<T>, Compare)): Call __min_element directly to
3223         avoid redundant debug checks for valid ranges.
3224         (max(initializer_list<T>), max(initializer_list<T>, Compare)):
3225         Likewise, for __max_element.
3226         (minmax(initializer_list<T>), minmax(initializer_list<T>, Compare)):
3227         Likewise, for __minmax_element.
3228
3229 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
3230
3231         * include/debug/deque (deque(size_type, const T&, const A&)):
3232         Prevent class template argument deduction and replace with a
3233         deduction guide.
3234         * include/debug/forward_list (forward_list(size_type, const T&, const A&)):
3235         Likewise.
3236         * include/debug/list (list(size_type, const T&, const A&)):
3237         Likewise.
3238         * include/debug/vector (vector(size_type, const T&, const A&)):
3239         Likewise.
3240
3241 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
3242
3243         * python/libstdcxx/v6/printers.py (StdBitReferencePrinter): Use
3244         'std::vector<bool>::reference' as type name, not _Bit_reference.
3245         (build_libstdcxx_dictionary): Register printers for vector<bool>
3246         types in debug mode too.
3247         * testsuite/libstdc++-prettyprinters/simple.cc: Adjust expected
3248         output for invalid _Bit_reference. Use vector<bool>::reference
3249         instead of _Bit_reference.
3250         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
3251
3252 2021-08-17  Thomas Schwinge  <thomas@codesourcery.com>
3253
3254         * testsuite/lib/libstdc++.exp: Avoid illegal argument to verbose,
3255         continued.
3256
3257 2021-08-17  Luc Michel  <lmichel@kalray.eu>
3258             Marc Poulhies  <mpoulhies@kalrayinc.com>
3259
3260         * testsuite/lib/gdb-test.exp (gdb_version_check)
3261         (gdb_version_check_xmethods): Only check the GDB version for
3262         local native targets.
3263
3264 2021-08-17  Antony Polukhin  <antoshkka@gmail.com>
3265             Jonathan Wakely  <jwakely@redhat.com>
3266
3267         * include/bits/random.tcc (seed_seq::seed_seq): Reserve capacity
3268         if distance is O(1).
3269         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
3270         line number.
3271
3272 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
3273
3274         * testsuite/26_numerics/random/seed_seq/cons/range.cc: Check
3275         construction from input iterators.
3276
3277 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
3278
3279         * python/libstdcxx/v6/printers.py (StdErrorCatPrinter): Remove.
3280
3281 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
3282
3283         PR libstdc++/101923
3284         * include/bits/std_function.h (function(function&&)): Check for
3285         non-empty parameter before doing any work.
3286
3287 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
3288
3289         * include/bits/cow_string.h (basic_string::contains): Do not
3290         define for -std=gnu++20.
3291
3292 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
3293
3294         * include/bits/ranges_util.h (__not_same_as): Rename to
3295         __different_from.
3296         * include/std/ranges (__not_same_as): Likewise.
3297
3298 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
3299
3300         * include/std/utility (exchange): Add noexcept-specifier.
3301         * testsuite/20_util/exchange/noexcept.cc: New test.
3302
3303 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
3304
3305         * python/libstdcxx/v6/printers.py (StdErrorCodePrinter): Define.
3306         (build_libstdcxx_dictionary): Register printer for
3307         std::error_code and std::error_condition.
3308         * testsuite/libstdc++-prettyprinters/cxx11.cc: Test it.
3309
3310 2021-08-16  Jonathan Wakely  <jwakely@redhat.com>
3311
3312         PR libstdc++/101937
3313         * src/c++11/debug.cc (PrintContext::_M_indent): Replace with a
3314         static data member.
3315         (print_word): Use qualified-id to access it.
3316
3317 2021-08-16  Jonathan Wakely  <jwakely@redhat.com>
3318
3319         * python/Makefile.am [GLIBCXX_BUILD_DEBUG] (install-data-local):
3320         Install another copy of the GDB hook.
3321         * python/Makefile.in: Regenerate.
3322
3323 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
3324
3325         PR libstdc++/101870
3326         * include/c_global/cmath (hypot): Use __promoted_t.
3327         (lerp): Add new overload accepting any arithmetic types.
3328         * include/ext/type_traits.h (__promoted_t): New alias template.
3329         * testsuite/26_numerics/lerp.cc: Moved to...
3330         * testsuite/26_numerics/lerp/1.cc: ...here.
3331         * testsuite/26_numerics/lerp/constexpr.cc: New test.
3332         * testsuite/26_numerics/lerp/version.cc: New test.
3333
3334 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
3335
3336         * testsuite/26_numerics/lerp.cc: Add header name to #error.
3337         * testsuite/26_numerics/midpoint/integral.cc: Likewise.
3338         * testsuite/26_numerics/midpoint/version.cc: New test.
3339
3340 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
3341
3342         * include/experimental/random (experimental::randint): Add
3343         nodiscard attribute.
3344
3345 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
3346
3347         * src/c++98/locale_init.cc: Require C++11.
3348         * src/c++98/localename.cc: Likewise.
3349         * src/c++98/misc-inst.cc: Require C++98.
3350
3351 2021-08-11  Jonathan Wakely  <jwakely@redhat.com>
3352
3353         PR libstdc++/101866
3354         * testsuite/experimental/random/randint.cc: Loop and retry if
3355         reseed() produces the same sequence.
3356
3357 2021-08-11  Jonathan Wakely  <jwakely@redhat.com>
3358
3359         * include/std/type_traits (__cpp_lib_is_pointer_interconvertible)
3360         (is_pointer_interconvertible_base_of_v)
3361         (is_pointer_interconvertible_base_of): Define for C++20.
3362         * include/std/version (__cpp_lib_is_pointer_interconvertible):
3363         Define.
3364         * testsuite/23_containers/span/layout_compat.cc: Use correct
3365         feature test macro for std::is_layout_compatible_v.
3366         * testsuite/20_util/is_pointer_interconvertible/value.cc: New test.
3367         * testsuite/20_util/is_pointer_interconvertible/version.cc: New test.
3368
3369 2021-08-09  Jonathan Wakely  <jwakely@redhat.com>
3370
3371         * include/bits/regex.h (basic_regex::transform_primary): Use
3372         _GLIBCXX_STD_C::vector for local variable.
3373         * include/bits/regex.tcc (__regex_algo_impl): Use reference to
3374         _GLIBCXX_STD_C::vector base class of match_results.
3375         * include/bits/regex_automaton.tcc (_StateSeq:_M_clone): Use
3376         _GLIBCXX_STD_C::map and _GLIBCXX_STD_C::deque for local
3377         variables.
3378         * include/bits/regex_compiler.h (_BracketMatcher): Use
3379         _GLIBCXX_STD_C::vector for data members.
3380         * include/bits/regex_executor.h (_Executor): Likewise.
3381         * include/std/regex [_GLIBCXX_DEBUG]: Include <debug/vector>.
3382
3383 2021-08-09  François Dumont  <fdumont@gcc.gnu.org>
3384
3385         * include/debug/safe_container.h
3386         (_Safe_container(_Safe_container&&, const _Alloc&, std::true_type)): New.
3387         (_Safe_container(_Safe_container&&, const _Alloc&, std::false_type)): New.
3388         (_Safe_container(_Safe_container&&, const _Alloc&)): Use latters.
3389
3390 2021-08-09  Jonathan Wakely  <jwakely@redhat.com>
3391
3392         * testsuite/23_containers/unordered_map/cons/default.cc: Add
3393         equality comparison operators to allocator.
3394         * testsuite/23_containers/unordered_set/cons/default.cc:
3395         Likewise.
3396
3397 2021-08-08  François Dumont  <fdumont@gcc.gnu.org>
3398
3399         * testsuite/25_algorithms/copy/debug/constexpr_neg.cc: Replace 'failed_assertion'
3400         dg-prune-output reason with 'builtin_unreachable'.
3401         * testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc: Likewise.
3402         * testsuite/25_algorithms/equal/debug/constexpr_neg.cc: Likewise.
3403         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc: Likewise.
3404         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc: Likewise.
3405         * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc: Likewise.
3406         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc: Likewise.
3407         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc: Likewise.
3408         * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc: Likewise.
3409
3410 2021-08-08  Hans-Peter Nilsson  <hp@bitrange.com>
3411
3412         * testsuite/std/ranges/iota/max_size_type.cc: Set
3413         dg-timeout-factor to 4.
3414
3415 2021-08-06  Jonathan Wakely  <jwakely@redhat.com>
3416
3417         * libsupc++/compare (compare_three_way, strong_order)
3418         (weak_order, partial_order, compare_strong_order_fallback)
3419         (compare_weak_order_fallback, compare_partial_order_fallback):
3420         Move nodiscard attributes to correct location.
3421
3422 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
3423
3424         PR libstdc++/101782
3425         * include/bits/ranges_base.h (ranges::begin, ranges::end)
3426         (ranges::rbegin, ranges::rend, ranges::size, ranges::ssize)
3427         (ranges::empty, ranges::data): Move attribute after the
3428         declarator-id instead of at the end of the declarator.
3429         * include/bits/stl_iterator.h (__gnu_cxx::__normal_iterator):
3430         Move attributes back to the start of the function declarator,
3431         but move the requires-clause to the end.
3432         (common_iterator): Move attribute after the declarator-id.
3433         * include/bits/stl_queue.h (queue): Remove ill-formed attributes
3434         from friend declaration that are not definitions.
3435         * include/std/ranges (views::all, views::filter)
3436         (views::transform, views::take, views::take_while,
3437         views::drop) (views::drop_while, views::join,
3438         views::lazy_split) (views::split, views::counted,
3439         views::common, views::reverse) (views::elements): Move
3440         attributes after the declarator-id.
3441
3442 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
3443
3444         * libsupc++/compare (partial_ordering, weak_ordering)
3445         (strong_ordering, is_eq, is_neq, is_lt, is_lteq, is_gt, is_gteq)
3446         (compare_three_way, strong_order, weak_order, partial_order)
3447         (compare_strong_order_fallback, compare_weak_order_fallback)
3448         (compare_partial_order_fallback, __detail::__synth3way): Add
3449         nodiscard attribute.
3450         * testsuite/18_support/comparisons/categories/zero_neg.cc: Add
3451         -Wno-unused-result to options.
3452
3453 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
3454
3455         PR libstdc++/101782
3456         * include/bits/ranges_base.h (ranges::begin, ranges::end)
3457         (ranges::rbegin, ranges::rend, ranges::size, ranges::ssize)
3458         (ranges::empty, ranges::data): Move attribute to the end of
3459         the declarator.
3460         * include/bits/stl_iterator.h (__gnu_cxx::__normal_iterator)
3461         (common_iterator): Likewise for non-member operator functions.
3462         * include/std/ranges (views::all, views::filter)
3463         (views::transform, views::take, views::take_while, views::drop)
3464         (views::drop_while, views::join, views::lazy_split)
3465         (views::split, views::counted, views::common, views::reverse)
3466         (views::elements): Likewise.
3467         * testsuite/std/ranges/access/101782.cc: New test.
3468
3469 2021-08-04  Jonathan Wakely  <jwakely@redhat.com>
3470
3471         * include/bits/forward_list.h: Add [[nodiscard]] to functions
3472         with no side-effects.
3473         * include/bits/stl_bvector.h: Likewise.
3474         * include/bits/stl_deque.h: Likewise.
3475         * include/bits/stl_list.h: Likewise.
3476         * include/bits/stl_queue.h: Likewise.
3477         * include/bits/stl_stack.h: Likewise.
3478         * include/bits/stl_vector.h: Likewise.
3479         * include/debug/deque: Likewise.
3480         * include/debug/forward_list: Likewise.
3481         * include/debug/list: Likewise.
3482         * include/debug/safe_iterator.h: Likewise.
3483         * include/debug/vector: Likewise.
3484         * include/std/array: Likewise.
3485         * testsuite/23_containers/array/creation/3_neg.cc: Use
3486         -Wno-unused-result.
3487         * testsuite/23_containers/array/debug/back1_neg.cc: Cast result
3488         to void.
3489         * testsuite/23_containers/array/debug/back2_neg.cc: Likewise.
3490         * testsuite/23_containers/array/debug/front1_neg.cc: Likewise.
3491         * testsuite/23_containers/array/debug/front2_neg.cc: Likewise.
3492         * testsuite/23_containers/array/debug/square_brackets_operator1_neg.cc:
3493         Likewise.
3494         * testsuite/23_containers/array/debug/square_brackets_operator2_neg.cc:
3495         Likewise.
3496         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
3497         Adjust dg-error line numbers.
3498         * testsuite/23_containers/deque/cons/clear_allocator.cc: Cast
3499         result to void.
3500         * testsuite/23_containers/deque/debug/invalidation/4.cc:
3501         Likewise.
3502         * testsuite/23_containers/deque/types/1.cc: Use
3503         -Wno-unused-result.
3504         * testsuite/23_containers/list/types/1.cc: Cast result to void.
3505         * testsuite/23_containers/priority_queue/members/7161.cc:
3506         Likewise.
3507         * testsuite/23_containers/queue/members/7157.cc: Likewise.
3508         * testsuite/23_containers/vector/59829.cc: Likewise.
3509         * testsuite/23_containers/vector/ext_pointer/types/1.cc:
3510         Likewise.
3511         * testsuite/23_containers/vector/ext_pointer/types/2.cc:
3512         Likewise.
3513         * testsuite/23_containers/vector/types/1.cc: Use
3514         -Wno-unused-result.
3515
3516 2021-08-04  Jonathan Wakely  <jwakely@redhat.com>
3517
3518         * include/bits/iterator_concepts.h (iter_move): Add
3519         [[nodiscard]].
3520         * include/bits/range_access.h (begin, end, cbegin, cend)
3521         (rbegin, rend, crbegin, crend, size, data, ssize): Likewise.
3522         * include/bits/ranges_base.h (ranges::begin, ranges::end)
3523         (ranges::cbegin, ranges::cend, ranges::rbegin, ranges::rend)
3524         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
3525         (ranges::empty, ranges::data, ranges::cdata): Likewise.
3526         * include/bits/stl_iterator.h (reverse_iterator, __normal_iterator)
3527         (back_insert_iterator, front_insert_iterator, insert_iterator)
3528         (move_iterator, move_sentinel, common_iterator)
3529         (counted_iterator): Likewise.
3530         * include/bits/stl_iterator_base_funcs.h (distance, next, prev):
3531         Likewise.
3532         * include/bits/stream_iterator.h (istream_iterator)
3533         (ostream_iterartor): Likewise.
3534         * include/bits/streambuf_iterator.h (istreambuf_iterator)
3535         (ostreambuf_iterator): Likewise.
3536         * include/std/ranges (views::single, views::iota, views::all)
3537         (views::filter, views::transform, views::take, views::take_while)
3538         (views::drop, views::drop_while, views::join, views::lazy_split)
3539         (views::split, views::counted, views::common, views::reverse)
3540         (views::elements): Likewise.
3541         * testsuite/20_util/rel_ops.cc: Use -Wno-unused-result.
3542         * testsuite/24_iterators/move_iterator/greedy_ops.cc: Likewise.
3543         * testsuite/24_iterators/normal_iterator/greedy_ops.cc:
3544         Likewise.
3545         * testsuite/24_iterators/reverse_iterator/2.cc: Likewise.
3546         * testsuite/24_iterators/reverse_iterator/greedy_ops.cc:
3547         Likewise.
3548         * testsuite/21_strings/basic_string/range_access/char/1.cc:
3549         Cast result to void.
3550         * testsuite/21_strings/basic_string/range_access/wchar_t/1.cc:
3551         Likewise.
3552         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
3553         Likewise.
3554         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
3555         Likewise.
3556         * testsuite/23_containers/array/range_access.cc: Likewise.
3557         * testsuite/23_containers/deque/range_access.cc: Likewise.
3558         * testsuite/23_containers/forward_list/range_access.cc:
3559         Likewise.
3560         * testsuite/23_containers/list/range_access.cc: Likewise.
3561         * testsuite/23_containers/map/range_access.cc: Likewise.
3562         * testsuite/23_containers/multimap/range_access.cc: Likewise.
3563         * testsuite/23_containers/multiset/range_access.cc: Likewise.
3564         * testsuite/23_containers/set/range_access.cc: Likewise.
3565         * testsuite/23_containers/unordered_map/range_access.cc:
3566         Likewise.
3567         * testsuite/23_containers/unordered_multimap/range_access.cc:
3568         Likewise.
3569         * testsuite/23_containers/unordered_multiset/range_access.cc:
3570         Likewise.
3571         * testsuite/23_containers/unordered_set/range_access.cc:
3572         Likewise.
3573         * testsuite/23_containers/vector/range_access.cc: Likewise.
3574         * testsuite/24_iterators/customization_points/iter_move.cc:
3575         Likewise.
3576         * testsuite/24_iterators/istream_iterator/sentinel.cc:
3577         Likewise.
3578         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc:
3579         Likewise.
3580         * testsuite/24_iterators/move_iterator/dr2061.cc: Likewise.
3581         * testsuite/24_iterators/operations/prev_neg.cc: Likewise.
3582         * testsuite/24_iterators/ostreambuf_iterator/2.cc: Likewise.
3583         * testsuite/24_iterators/range_access/range_access.cc:
3584         Likewise.
3585         * testsuite/24_iterators/range_operations/100768.cc: Likewise.
3586         * testsuite/26_numerics/valarray/range_access2.cc: Likewise.
3587         * testsuite/28_regex/range_access.cc: Likewise.
3588         * testsuite/experimental/string_view/range_access/char/1.cc:
3589         Likewise.
3590         * testsuite/experimental/string_view/range_access/wchar_t/1.cc:
3591         Likewise.
3592         * testsuite/ext/vstring/range_access.cc: Likewise.
3593         * testsuite/std/ranges/adaptors/take.cc: Likewise.
3594         * testsuite/std/ranges/p2259.cc: Likewise.
3595
3596 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3597
3598         * include/bits/random.tcc (linear_congruential_engine): Do not
3599         define static constexpr members when they are implicitly inline.
3600         * include/std/ratio (ratio, __ratio_multiply, __ratio_divide)
3601         (__ratio_add, __ratio_subtract): Likewise.
3602         * include/std/type_traits (integral_constant): Likewise.
3603         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
3604         line number.
3605
3606 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3607
3608         * testsuite/util/testsuite_common_types.h: Replace uses of
3609         tr1::unordered_map and tr1::unordered_set with their C++11
3610         equivalents.
3611         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust
3612         dg-error line number.
3613         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
3614         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
3615         Likewise.
3616         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc:
3617         Likewise.
3618         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
3619         Likewise.
3620         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
3621         Likewise.
3622         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
3623         Likewise.
3624
3625 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3626
3627         * include/std/memory_resource (polymorphic_allocator::delete_object):
3628         Call destructor directly instead of using destroy.
3629         (allocator_traits<polymorphic_allocator<T>>): Define partial
3630         specialization.
3631
3632 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3633
3634         * testsuite/20_util/function_objects/binders/3113.cc: Remove
3635         trailing whitespace.
3636         * testsuite/20_util/shared_ptr/assign/auto_ptr.cc: Likewise.
3637         * testsuite/20_util/shared_ptr/assign/auto_ptr_neg.cc: Likewise.
3638         * testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc:
3639         Likewise.
3640         * testsuite/20_util/shared_ptr/creation/dr925.cc: Likewise.
3641         * testsuite/25_algorithms/headers/algorithm/synopsis.cc:
3642         Likewise.
3643         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc:
3644         Likewise.
3645         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc:
3646         Likewise.
3647
3648 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3649
3650         * doc/xml/manual/evolution.xml: Document deprecation.
3651         * doc/html/*: Regenerate.
3652         * include/bits/c++config (_GLIBCXX14_DEPRECATED): Define.
3653         (_GLIBCXX14_DEPRECATED_SUGGEST): Define.
3654         * include/bits/stl_algo.h (random_shuffle): Deprecate for C++14
3655         and later.
3656         * testsuite/25_algorithms/headers/algorithm/synopsis.cc: Adjust
3657         for C++11 and C++14 changes to std::random_shuffle and
3658         std::shuffle.
3659         * testsuite/25_algorithms/random_shuffle/1.cc: Add options to
3660         use deprecated algorithms.
3661         * testsuite/25_algorithms/random_shuffle/59603.cc: Likewise.
3662         * testsuite/25_algorithms/random_shuffle/moveable.cc: Likewise.
3663         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc:
3664         Likewise.
3665         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc:
3666         Likewise.
3667
3668 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3669
3670         * testsuite/23_containers/forward_list/operations/3.cc:
3671         Use lambda instead of std::bind2nd.
3672         * testsuite/20_util/function_objects/binders/3113.cc: Add
3673         options for testing deprecated features.
3674         * testsuite/20_util/pair/cons/99957.cc: Likewise.
3675         * testsuite/20_util/shared_ptr/assign/auto_ptr.cc: Likewise.
3676         * testsuite/20_util/shared_ptr/assign/auto_ptr_neg.cc: Likewise.
3677         * testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc:
3678         Likewise.
3679         * testsuite/20_util/shared_ptr/cons/43820_neg.cc: Likewise.
3680         * testsuite/20_util/shared_ptr/cons/auto_ptr.cc: Likewise.
3681         * testsuite/20_util/shared_ptr/cons/auto_ptr_neg.cc: Likewise.
3682         * testsuite/20_util/shared_ptr/creation/dr925.cc: Likewise.
3683         * testsuite/20_util/unique_ptr/cons/auto_ptr.cc: Likewise.
3684         * testsuite/20_util/unique_ptr/cons/auto_ptr_neg.cc: Likewise.
3685         * testsuite/ext/pb_ds/example/priority_queue_erase_if.cc:
3686         Likewise.
3687         * testsuite/ext/pb_ds/example/priority_queue_split_join.cc:
3688         Likewise.
3689         * testsuite/lib/dg-options.exp (dg_add_options_using-deprecated):
3690         New proc.
3691
3692 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3693
3694         * include/bits/regex_executor.h (_State_info): Replace
3695         unique_ptr<bool[]> with array of bool.
3696         * include/bits/regex_executor.tcc: Likewise.
3697         * include/bits/regex_scanner.tcc: Replace std::strchr with
3698         __builtin_strchr.
3699         * include/std/regex: Replace standard headers with smaller
3700         internal ones.
3701         * testsuite/28_regex/traits/char/lookup_classname.cc: Include
3702         <string.h> for strlen.
3703         * testsuite/28_regex/traits/char/lookup_collatename.cc:
3704         Likewise.
3705
3706 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3707
3708         * include/bits/locale_conv.h (__detail::_Scoped_ptr): Define new
3709         RAII class template.
3710         (wstring_convert, wbuffer_convert): Use __detail::_Scoped_ptr
3711         instead of unique_ptr.
3712
3713 2021-08-02  Patrick Palka  <ppalka@redhat.com>
3714
3715         PR libstdc++/101599
3716         * include/bits/ranges_algo.h (__reverse_copy_fn::operator()):
3717         Add missing std::move in return statement.
3718         (__partition_copy_fn::operator()): Rename templtae parameter
3719         _O2 to _Out2.  Uglify function parameters out_true and out_false.
3720         * include/bits/ranges_algobase.h (__copy_or_move): Add missing
3721         std::move to recursive call that unwraps a __normal_iterator
3722         output iterator.
3723         * testsuite/25_algorithms/copy/constrained.cc (test06): New test.
3724         * testsuite/25_algorithms/move/constrained.cc (test05): New test.
3725
3726 2021-08-02  Patrick Palka  <ppalka@redhat.com>
3727
3728         PR libstdc++/101589
3729         * include/std/ranges (lazy_split_view::_InnerIter::base): Make
3730         the const& overload unconstrained and return a const reference
3731         as per LWG 3533.  Make unconditionally noexcept.
3732         (elements_view::base): Revert accidental r12-569 change.
3733         (elements_view::_Iterator::base): Make the const& overload
3734         unconstrained and return a const reference as per LWG 3533.
3735         Make unconditionally noexcept.
3736
3737 2021-08-02  Patrick Palka  <ppalka@redhat.com>
3738
3739         PR libstdc++/101483
3740         * include/std/ranges (join_view::_Iterator::_Iterator): Add
3741         missing std::move.
3742
3743 2021-08-02  Jonathan Wakely  <jwakely@redhat.com>
3744
3745         PR libstdc++/101709
3746         * src/filesystem/ops-common.h (get_temp_directory_from_env):
3747         Add error_code parameter.
3748         * src/c++17/fs_ops.cc (fs::temp_directory_path): Pass error_code
3749         argument to get_temp_directory_from_env and check it.
3750         * src/filesystem/ops.cc (fs::temp_directory_path): Likewise.
3751
3752 2021-08-02  Jonathan Wakely  <jwakely@redhat.com>
3753
3754         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
3755         Add dg-error for c++11_only target.
3756
3757 2021-07-30  Jonathan Wakely  <jwakely@redhat.com>
3758
3759         PR libstdc++/65018
3760         * configure.ac: Check for secure_getenv.
3761         * config.h.in: Regenerate.
3762         * configure: Regenerate.
3763         * src/filesystem/ops-common.h (get_temp_directory_from_env): New
3764         helper function to obtain path from the environment.
3765         * src/c++17/fs_ops.cc (fs::temp_directory_path): Use new helper.
3766         * src/filesystem/ops.cc (fs::temp_directory_path): Likewise.
3767         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
3768         Print messages if test cannot be run.
3769         * testsuite/experimental/filesystem/operations/temp_directory_path.cc:
3770         Likewise. Fix incorrect condition. Use "TMP" to work with
3771         Windows as well as POSIX.
3772
3773 2021-07-29  Hans-Peter Nilsson  <hp@bitrange.com>
3774
3775         * src/c++17/memory_resource.cc: Use __exchange instead
3776         of std::exchange.
3777
3778 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
3779
3780         * include/experimental/optional (__throw_bad_optional_access):
3781         Replace GNU attribute with C++11 attribute.
3782         (optional::value, optional::value_or): Use if statements
3783         instead of conditional expressions.
3784         * include/std/optional (__throw_bad_optional_access)
3785         (optional::value, optional::value_or): Likewise.
3786
3787 2021-07-27  Marek Polacek  <polacek@redhat.com>
3788
3789         DR 1512
3790         PR c++/99701
3791         * testsuite/20_util/tuple/comparison_operators/overloaded.cc:
3792         Move a line...
3793         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
3794         ...here.  New test.
3795
3796 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
3797
3798         * include/bits/cow_string.h: Consistently use tab for
3799         indentation.
3800
3801 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
3802
3803         * include/Makefile.am: Add new header.
3804         * include/Makefile.in: Regenerate.
3805         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
3806         (basic_string): Move definition of Copy-on-Write string to
3807         new file.
3808         * include/bits/basic_string.tcc: Likewise.
3809         * include/bits/cow_string.h: New file.
3810
3811 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
3812
3813         * include/std/algorithm: Do not include <utility>.
3814         * include/std/functional: Likewise.
3815         * include/std/regex: Include <bits/stl_pair.h> instead of
3816         <utility>.
3817         * include/debug/map.h: Likewise.
3818         * include/debug/multimap.h: Likewise.
3819         * include/debug/multiset.h: Likewise.
3820         * include/debug/set.h: Likewise.
3821         * include/debug/vector: Likewise.
3822         * include/bits/fs_path.h: Likewise.
3823         * include/bits/unique_ptr.h: Do not include <utility>.
3824         * include/experimental/any: Likewise.
3825         * include/experimental/executor: Likewise.
3826         * include/experimental/memory: Likewise.
3827         * include/experimental/optional: Likewise.
3828         * include/experimental/socket: Use __exchange instead
3829         of std::exchange.
3830         * src/filesystem/ops-common.h: Likewise.
3831         * testsuite/20_util/default_delete/48631_neg.cc: Adjust expected
3832         errors to not use a hardcoded line number.
3833         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
3834         * testsuite/20_util/specialized_algorithms/uninitialized_copy/constrained.cc:
3835         Include <utility> for std::as_const.
3836         * testsuite/20_util/specialized_algorithms/uninitialized_default_construct/constrained.cc:
3837         Likewise.
3838         * testsuite/20_util/specialized_algorithms/uninitialized_move/constrained.cc:
3839         Likewise.
3840         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/constrained.cc:
3841         Likewise.
3842         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
3843         Adjust dg-error line number.
3844
3845 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
3846
3847         * include/Makefile.am: Add bits/utility.h header.
3848         * include/Makefile.in: Regenerate.
3849         * include/bits/utility.h: New file.
3850         * include/std/utility (tuple_size, tuple_element): Move
3851         to new header.
3852         * include/std/type_traits (__is_tuple_like_impl<tuple<T...>>):
3853         Move to <tuple>.
3854         (_Index_tuple, _Build_index_tuple, integer_sequence): Likewise.
3855         (in_place_t, in_place_index_t, in_place_type_t): Likewise.
3856         * include/bits/ranges_util.h: Include new header instead of
3857         <utility>.
3858         * include/bits/stl_pair.h (tuple_size, tuple_element): Move
3859         partial specializations for std::pair here.
3860         (get): Move overloads for std::pair here.
3861         * include/std/any: Include new header instead of <utility>.
3862         * include/std/array: Likewise.
3863         * include/std/memory_resource: Likewise.
3864         * include/std/optional: Likewise.
3865         * include/std/variant: Likewise.
3866         * include/std/tuple: Likewise.
3867         (__is_tuple_like_impl<tuple<T...>>): Move here.
3868         (get) Declare overloads for std::array.
3869         * include/std/version (__cpp_lib_tuples_by_type): Change type
3870         to long.
3871         * testsuite/20_util/optional/84601.cc: Include <utility>.
3872         * testsuite/20_util/specialized_algorithms/uninitialized_fill/constrained.cc:
3873         Likewise.
3874         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
3875         Adjust dg-error line numbers.
3876         * testsuite/std/ranges/access/cbegin.cc: Include <utility>.
3877         * testsuite/std/ranges/access/cend.cc: Likewise.
3878         * testsuite/std/ranges/access/end.cc: Likewise.
3879         * testsuite/std/ranges/single_view.cc: Likewise.
3880
3881 2021-07-23  Jonathan Wakely  <jwakely@redhat.com>
3882
3883         * include/std/future: Include <bits/atomic_base.h> instead of
3884         <atomic>.
3885
3886 2021-07-23  Jonathan Wakely  <jwakely@redhat.com>
3887
3888         * include/bits/stl_relops.h: Update documentation comments.
3889
3890 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3891
3892         PR libstdc++/101583
3893         * include/bits/hashtable.h (_Hashtable): Replace mixin with
3894         _Enable_default_ctor. Construct it explicitly in all
3895         non-forwarding, non-defaulted constructors.
3896         * testsuite/23_containers/unordered_map/cons/default.cc: Check
3897         non-default constructors can be used.
3898         * testsuite/23_containers/unordered_set/cons/default.cc:
3899         Likewise.
3900
3901 2021-07-22  David Edelsohn  <dje.gcc@gmail.com>
3902
3903         * config/os/aix/os_defines.h (__LIBC_NO_CPP_MATH_OVERLOADS__): Define.
3904
3905 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3906
3907         PR libstdc++/94295
3908         * include/ext/new_allocator.h (_GLIBCXX_OPERATOR_NEW)
3909         (_GLIBCXX_OPERATOR_DELETE, _GLIBCXX_SIZED_DEALLOC): Define.
3910         (allocator::allocate, allocator::deallocate): Use new macros.
3911
3912 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3913
3914         PR libstdc++/101571
3915         * include/bits/ranges_uninitialized.h (_DestroyGuard): Change
3916         constructor parameter to reference and use addressof.
3917         * testsuite/util/testsuite_iterators.h: Define deleted operator&
3918         overloads for test iterators.
3919
3920 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3921
3922         * include/bits/std_function.h (_Function_base): Add
3923         default member initializers and define constructor as defaulted.
3924         (function::_M_invoker): Add default member initializer.
3925
3926 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3927
3928         PR libstdc++/100682
3929         * doc/xml/manual/debug_mode.xml: Update documentation about
3930         debug capability of std::array.
3931         * doc/html/*: Regenerate.
3932         * include/debug/array: New file.
3933
3934 2021-07-21  Jonathan Wakely  <jwakely@redhat.com>
3935
3936         PR libstdc++/101542
3937         * include/ext/rope (sequence_buffer): Add move constructor and
3938         move assignment operator.
3939         * testsuite/ext/rope/101542.cc: New test.
3940
3941 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
3942
3943         PR libstdc++/101510
3944         * src/c++17/fs_ops.cc (fs::create_directories): Use status
3945         instead of symlink_status.
3946         * src/filesystem/ops.cc (fs::create_directories): Likewise.
3947         * testsuite/27_io/filesystem/operations/create_directories.cc:
3948         Check symlink to existing directory.
3949         * testsuite/27_io/filesystem/operations/create_directory.cc: Do
3950         not test with symlinks on Windows.
3951         * testsuite/experimental/filesystem/operations/create_directories.cc:
3952         Check symlink to existing directory.
3953         * testsuite/experimental/filesystem/operations/create_directory.cc:
3954         Do not test with symlinks on Windows.
3955
3956 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
3957
3958         PR libstdc++/100863
3959         * include/bits/hashtable.h (_Hashtable): Conditionally delete
3960         default constructor by deriving from _Enable_special_members.
3961         * testsuite/23_containers/unordered_map/cons/default.cc: New test.
3962         * testsuite/23_containers/unordered_set/cons/default.cc: New test.
3963
3964 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
3965
3966         PR libstdc++/101510
3967         * src/c++17/fs_ops.cc (create_dir): Adjust whitespace.
3968         * testsuite/27_io/filesystem/operations/create_directory.cc:
3969         Test creating directory with name of existing symlink to
3970         directory.
3971         * testsuite/experimental/filesystem/operations/create_directory.cc:
3972         Likewise.
3973
3974 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3975
3976         * include/std/tuple (get<I>): Add deleted overload for bad
3977         index.
3978         * testsuite/20_util/tuple/element_access/get_neg.cc: Adjust
3979         expected errors.
3980
3981 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3982
3983         * include/bits/max_size_type.h (numeric_limits<__max_size_type>):
3984         Use __int_traits unconditionally.
3985
3986 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3987
3988         * include/bits/random.h (_Shift::__value): Use constexpr.
3989         (_Select_uint_least_t::type): Use using-declaration.
3990         (_Mod): Likewise.
3991         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
3992         line number.
3993
3994 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3995
3996         * include/bits/cpp_type_traits.h (__INT_N): Use __extension__
3997         instead of diagnostic pragmas.
3998         * include/bits/functional_hash.h: Likewise.
3999         * include/bits/iterator_concepts.h (__is_signed_int128)
4000         (__is_unsigned_int128): Likewise.
4001         * include/bits/max_size_type.h (__max_size_type): Likewise.
4002         (numeric_limits<__max_size_type>): Likewise.
4003         * include/bits/std_abs.h (abs): Likewise.
4004         * include/bits/stl_algobase.h (__size_to_integer): Likewise.
4005         * include/bits/uniform_int_dist.h (uniform_int_distribution):
4006         Likewise.
4007         * include/ext/numeric_traits.h (_GLIBCXX_INT_N_TRAITS):
4008         Likewise.
4009         * include/std/type_traits (__is_integral_helper<INT_N>)
4010         (__is_signed_integer, __is_unsigned_integer)
4011         (__make_unsigned<INT_N>, __make_signed<INT_N>): Likewise.
4012         * include/std/limits (__INT_N): Add __extension__ keyword.
4013         * include/bits/random.h (_Select_uint_least_t)
4014         (random_device): Likewise.
4015
4016 2021-07-16  Patrick Palka  <ppalka@redhat.com>
4017
4018         PR libstdc++/101231
4019         * include/std/ranges (_CachedPosition::_M_get): For non-forward
4020         ranges, just call __builtin_unreachable.
4021         * testsuite/std/ranges/istream_view.cc (test05): New test.
4022
4023 2021-07-16  Patrick Palka  <ppalka@redhat.com>
4024
4025         PR libstdc++/101214
4026         * include/std/ranges (split_view::split_view): Use std::move.
4027         (split_view::_Iterator::_Iterator): Remove redundant
4028         default_initializable constraint.
4029         (split_view::_Sentinel::_Sentinel): Declare.
4030         * testsuite/std/ranges/adaptors/split.cc (test02): New test.
4031
4032 2021-07-16  Marek Polacek  <polacek@redhat.com>
4033
4034         * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Add
4035         dg-error.
4036
4037 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
4038
4039         * include/bits/unique_ptr.h: Adjust doxygen markup.
4040
4041 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
4042
4043         PR libstdc++/101307
4044         * include/std/type_traits: Adjust doxygen markup.
4045
4046 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
4047
4048         * include/bits/cpp_type_traits.h: Add diagnostic pragmas around
4049         uses of non-standard integer types.
4050         * include/bits/functional_hash.h: Likewise.
4051         * include/bits/iterator_concepts.h: Likewise.
4052         * include/bits/max_size_type.h: Likewise.
4053         * include/bits/std_abs.h: Likewise.
4054         * include/bits/stl_algobase.h: Likewise.
4055         * include/bits/uniform_int_dist.h: Likewise.
4056         * include/ext/numeric_traits.h: Likewise.
4057         * include/std/type_traits: Likewise.
4058
4059 2021-07-15  Jonathan Wakely  <jwakely@redhat.com>
4060
4061         PR libstdc++/101427
4062         * include/std/tuple (tuple_element): Improve static_assert text.
4063         (__get_helper): Add deleted overload.
4064         (get<i>(tuple<T...>&&), get<i>(const tuple<T...>&&)): Use
4065         __get_helper directly.
4066         (__get_helper2): Remove.
4067         (__find_uniq_type_in_pack): New constexpr helper function.
4068         (get<T>): Use __find_uniq_type_in_pack and __get_helper instead
4069         of __get_helper2.
4070         * testsuite/20_util/tuple/element_access/get_neg.cc: Adjust
4071         expected errors.
4072         * testsuite/20_util/tuple/element_access/101427.cc: New test.
4073
4074 2021-07-15  Jonathan Wakely  <jwakely@redhat.com>
4075
4076         PR libstdc++/101429
4077         * include/bits/c++config (__replacement_assert): Add noexcept.
4078         [!_GLIBCXX_VERBOSE] (__glibcxx_assert_impl): Use __builtin_abort
4079         instead of __replacement_assert.
4080
4081 2021-07-14  Jonathan Wakely  <jwakely@redhat.com>
4082
4083         * include/std/string_view (basic_string_view(It, End)): Add
4084         noexcept-specifier.
4085         * testsuite/21_strings/basic_string_view/cons/char/range.cc:
4086         Check noexcept-specifier. Also check construction without CTAD.
4087
4088 2021-07-13  Jonathan Wakely  <jwakely@redhat.com>
4089
4090         PR c++/101361
4091         * include/std/string_view (ends_with): Use traits_type::compare
4092         directly.
4093
4094 2021-07-13  Jonathan Wakely  <jwakely@redhat.com>
4095
4096         * include/std/string_view: Only include <bits/ranges_base.h>
4097         once, and only for C++20 and later.
4098
4099 2021-07-12  Jonathan Wakely  <jwakely@redhat.com>
4100
4101         PR libstdc++/101411
4102         * include/std/span (as_writable_bytes): Add requires-clause.
4103         * testsuite/23_containers/span/101411.cc: New test.
4104
4105 2021-07-09  Matheus Castanho  <msc@linux.ibm.com>
4106
4107         * include/std/mutex (__lock_impl): Check
4108         _GLIBCXX_HAS_GTHREADS before using __gthread_yield.
4109
4110 2021-07-02  Jonathan Wakely  <jwakely@redhat.com>
4111
4112         PR libstdc++/101271
4113         * include/bits/unique_ptr.h (unique_ptr<T[],D>::operator[]):
4114         Remove noexcept-specifier.
4115         (unique_ptr<T[],D>::_S_nothrow_deref): Remove.
4116         * testsuite/20_util/unique_ptr/lwg2762.cc: Remove checks for
4117         operator[].
4118
4119 2021-07-01  Jonathan Wakely  <jwakely@redhat.com>
4120
4121         * doc/doxygen/doxygroups.cc: Fix docs for std::literals.
4122         * doc/doxygen/user.cfg.in: Exclude the Networking TS header.
4123         Add some more predefined macros.
4124         * include/bits/fs_fwd.h: Move @addtogroup commands inside
4125         namespaces. Add better documentation.
4126         * include/bits/fs_path.h: Likewise.
4127         * include/experimental/bits/fs_fwd.h: Likewise.
4128         * include/experimental/bits/fs_path.h: Likewise.
4129         * include/ext/throw_allocator.h: Fix typo and improve docs.
4130         * include/std/chrono: Move @addtogroup commands.
4131         * include/std/system_error: Move @addtogroup commands.
4132         * libsupc++/exception: Improve documentation.
4133         * libsupc++/exception.h: Add @since documentation.
4134
4135 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
4136
4137         PR libstdc++/101258
4138         * doc/doxygen/user.cfg.in (INPUT): Add <experimental/simd>.
4139         (COLS_IN_ALPHA_INDEX): Remove obsolete tag.
4140         (PREDEFINED): Add/fix some more macros that need to be expanded.
4141         * include/bits/random.h: Stop Doxygen from documenting internal
4142         implementation details.
4143         * include/bits/random.tcc: Likewise.
4144         * include/bits/this_thread_sleep.h: Fix @file name.
4145         * include/experimental/bits/simd.h: Add to Doxygen group. Do not
4146         document internal implementation details.
4147         * include/experimental/bits/simd_detail.h: Do not document
4148         internal implementation details.
4149         * include/experimental/simd: Define Doxygen groups.
4150         * include/experimental/type_traits: Improve documentation for
4151         the header file. Define groups. Use @since commands.
4152         * include/std/scoped_allocator (scoped_allocator_adaptor): Move
4153         declaration before undocumented region.
4154         * include/std/type_traits (true_type, false_type): Use using
4155         declaration instead of typedef.
4156         (is_invocable_v, is_nothrow_invocable_v, is_invocable_r_v)
4157         (is_nothrow_invocable_r_v): Move definitions next to other C++17
4158         variable templates.
4159         Do not document internal implementation details. Move misplaced
4160         group-end command. Define group for variable templates.
4161         * include/std/variant: Do not document internal implementation
4162         details.
4163         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
4164         line number.
4165
4166 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
4167
4168         * include/experimental/simd: Do not define anything pre-C++17.
4169
4170 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
4171
4172         * include/bits/random.tcc [__cpp_inline_variables]: Remove
4173         redundant definitions of static constexpr member variables.
4174         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
4175         line number.
4176
4177 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
4178
4179         * include/bits/streambuf.tcc (__copy_streambufs_eof): Remove
4180         explicit instantiation declarations.
4181         * src/c++11/streambuf-inst.cc (__copy_streambufs_eof): Remove
4182         explicit instantiation definitions.
4183
4184 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
4185
4186         PR libstdc++/97088
4187         * testsuite/17_intro/names.cc: Fix #if condition for names used
4188         by newlib headers.
4189
4190 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
4191
4192         PR libstdc++/101236
4193         * include/bits/unique_ptr.h (unique_ptr<T[], D>::operator[]):
4194         Fail gracefully if element_type is incomplete.
4195         * testsuite/20_util/unique_ptr/cons/incomplete.cc: Clarify that
4196         the standard doesn't require this test to work for array types.
4197         * testsuite/20_util/unique_ptr/lwg2762.cc: Check that incomplete
4198         types can be used with array specialization.
4199         * testsuite/20_util/unique_ptr/101236.cc: New test.
4200
4201 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
4202
4203         * doc/xml/manual/intro.xml: Document LWG 415 change.
4204         * doc/html/manual/bugs.html: Regenerate.
4205         * include/bits/istream.tcc (ws): Create sentry and catch
4206         exceptions.
4207         * testsuite/27_io/basic_istream/ws/char/lwg415.cc: New test.
4208         * testsuite/27_io/basic_istream/ws/wchar_t/lwg415.cc: New test.
4209
4210 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
4211
4212         * include/bits/ostream.tcc (basic_ostream::write): Call sputn
4213         directly instead of using _M_write. Do setstate(__err) all
4214         outside the try-catch block.
4215         * include/std/ostream (basic_ostream::_M_write): Declare
4216         private. Use __ostream_insert. Do not define for the versioned
4217         namespace.
4218
4219 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
4220
4221         * doc/xml/manual/intro.xml: Document LWG 581 change.
4222         * doc/html/manual/bugs.html: Regenerate.
4223         * include/bits/basic_ios.tcc: Whitespace.
4224         * include/bits/ostream.tcc (basic_ostream::flush()): Construct
4225         sentry.
4226         * testsuite/27_io/basic_ostream/flush/char/2.cc: Check
4227         additional cases.
4228         * testsuite/27_io/basic_ostream/flush/char/exceptions_badbit_throw.cc:
4229         Likewise.
4230         * testsuite/27_io/basic_ostream/flush/wchar_t/2.cc: Likewise.
4231         * testsuite/27_io/basic_ostream/flush/wchar_t/exceptions_badbit_throw.cc:
4232         Likewise.
4233
4234 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
4235
4236         * include/bits/ostream.tcc (sentry): Only set failbit if badbit
4237         is set, not if eofbit is set.
4238         (tellp, seekp, seekp): Create sentry object. Do not set badbit
4239         on exceptions.
4240         * testsuite/27_io/basic_ostream/seekp/char/exceptions_badbit_throw.cc:
4241         Adjust expected behaviour.
4242         * testsuite/27_io/basic_ostream/seekp/wchar_t/exceptions_badbit_throw.cc:
4243         Likewise.
4244         * testsuite/27_io/basic_ostream/tellp/char/exceptions_badbit_throw.cc:
4245         Likewise.
4246         * testsuite/27_io/basic_ostream/tellp/wchar_t/exceptions_badbit_throw.cc:
4247         Likewise.
4248         * testsuite/27_io/basic_ostream/seekp/char/n3168.cc: New test.
4249         * testsuite/27_io/basic_ostream/seekp/wchar_t/n3168.cc: New test.
4250         * testsuite/27_io/basic_ostream/tellp/char/n3168.cc: New test.
4251         * testsuite/27_io/basic_ostream/tellp/wchar_t/n3168.cc: New test.
4252
4253 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
4254
4255         * include/std/syncstream (basic_syncbuf::swap()): Remove
4256         noexcept, as per LWG 3498.
4257
4258 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
4259
4260         PR libstdc++/97088
4261         * testsuite/17_intro/names.cc: Undef more names for newlib and
4262         also for arm-none-linux-gnueabi.
4263         * testsuite/experimental/names.cc: Disable PCH.
4264
4265 2021-06-25  Matthias Kretz  <m.kretz@gsi.de>
4266
4267         * include/experimental/bits/simd.h (__bit_cast): Implement via
4268         __builtin_bit_cast #if available.
4269         (__proposed::simd_bit_cast): Add overloads for simd and
4270         simd_mask, which use __builtin_bit_cast (or __bit_cast #if not
4271         available), which return an object of the requested type with
4272         the same bits as the argument.
4273         * include/experimental/bits/simd_math.h: Use simd_bit_cast
4274         instead of __bit_cast to allow casts to fixed_size_simd.
4275         (copysign): Remove branch that was only required if __bit_cast
4276         cannot be constexpr.
4277         * testsuite/experimental/simd/tests/bits/test_values.h: Switch
4278         from __bit_cast to __proposed::simd_bit_cast since the former
4279         will not cast fixed_size objects anymore.
4280
4281 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
4282
4283         * include/experimental/bits/simd_math.h
4284         (_GLIBCXX_SIMD_MATH_CALL2_): Rename arg2_ to __arg2.
4285         (_GLIBCXX_SIMD_MATH_CALL3_): Rename arg2_ to __arg2 and arg3_ to
4286         __arg3.
4287
4288 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
4289
4290         * include/experimental/bits/simd.h (__execute_on_index_sequence)
4291         (__execute_on_index_sequence_with_return)
4292         (__call_with_n_evaluations, __call_with_subscripts): Add flatten
4293         attribute.
4294
4295 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
4296
4297         * include/experimental/bits/simd_x86.h (_S_trunc, _S_floor)
4298         (_S_ceil): Set bit 8 (_MM_FROUND_NO_EXC) on AVX and SSE4.1
4299         roundp[sd] calls.
4300
4301 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
4302
4303         * include/experimental/bits/simd_x86.h (_S_ldexp): The AVX512F
4304         implementation doesn't require a _VecBltnBtmsk ABI tag, it
4305         requires either a 64-Byte input (in which case AVX512F must be
4306         available) or AVX512VL.
4307
4308 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
4309
4310         * include/experimental/bits/simd_math.h: Undefine internal
4311         macros after use.
4312         (frexp): Move #if to a more sensible position and reformat
4313         preceding code.
4314         (logb): Call _SimdImpl::_S_logb for fixed_size instead of
4315         duplicating the code here.
4316         (modf): Simplify condition.
4317
4318 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
4319
4320         * include/experimental/bits/simd_math.h (fabs): Remove
4321         fabs(simd<integral>) overload.
4322
4323 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
4324
4325         * include/experimental/bits/simd_converter.h
4326         (_SimdConverter::operator()): Pass _SimdTuple by const-ref.
4327         * include/experimental/bits/simd_fixed_size.h
4328         (_GLIBCXX_SIMD_FIXED_OP): Pass binary operator _SimdTuple
4329         arguments by const-ref.
4330         (_S_masked_unary): Pass _SimdTuple by const-ref.
4331
4332 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
4333
4334         * include/experimental/bits/simd_fixed_size.h
4335         (_AbisInSimdTuple): Removed.
4336
4337 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
4338
4339         * include/experimental/bits/simd.h: Add missing operator~
4340         overload for simd<floating-point> to __float_bitwise_operators.
4341         * include/experimental/bits/simd_builtin.h
4342         (_SimdImplBuiltin::_S_complement): Bitcast to int (and back) to
4343         implement complement for floating-point vectors.
4344         * include/experimental/bits/simd_fixed_size.h
4345         (_SimdImplFixedSize::_S_copysign): New function, forwarding to
4346         copysign implementation of _SimdTuple members.
4347         * include/experimental/bits/simd_math.h (copysign): Call
4348         _SimdImpl::_S_copysign for fixed_size arguments. Simplify
4349         generic copysign implementation using the new ~ operator.
4350
4351 2021-06-24  Jonathan Wakely  <jwakely@redhat.com>
4352
4353         * testsuite/experimental/simd/README.md: Fix typos.
4354
4355 2021-06-24  Jonathan Wakely  <jwakely@redhat.com>
4356
4357         * include/bits/shared_ptr_base.h (__shared_ptr_access::operator[]):
4358         Add noexcept.
4359         * include/bits/unique_ptr.h (unique_ptr::operator*): Add
4360         conditional noexcept as per LWG 2762.
4361         * testsuite/20_util/shared_ptr/observers/array.cc: Check that
4362         dereferencing cannot throw.
4363         * testsuite/20_util/shared_ptr/observers/get.cc: Likewise.
4364         * testsuite/20_util/optional/observers/lwg2762.cc: New test.
4365         * testsuite/20_util/unique_ptr/lwg2762.cc: New test.
4366
4367 2021-06-23  Patrick Palka  <ppalka@redhat.com>
4368
4369         PR c++/101174
4370         * testsuite/23_containers/multiset/cons/deduction.cc:
4371         Uncomment CTAD example that was rejected by this bug.
4372         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
4373
4374 2021-06-23  Jonathan Wakely  <jwakely@redhat.com>
4375
4376         * include/std/chrono (chrono::year::is_leap()): Fix incorrect
4377         logic in comment.
4378
4379 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
4380
4381         * testsuite/experimental/simd/README.md: New file.
4382
4383 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
4384
4385         * testsuite/experimental/simd/driver.sh: Rewrite output
4386         verbosity logic. Add -p/--percentage option. Allow -v/--verbose
4387         to be used twice. Add -x and -o short options. Parse long
4388         options with = instead of separating space generically. Parce
4389         contracted short options. Make unrecognized options an error.
4390         If same-line output is active, trap on EXIT to increment the
4391         progress (only with --percentage), erase the line and print the
4392         current status.
4393         * testsuite/experimental/simd/generate_makefile.sh: Initialize
4394         helper files for progress account keeping. Update help target
4395         for changes to DRIVEROPTS.
4396
4397 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
4398
4399         * testsuite/Makefile.am (check-simd): Remove -fno-tree-vrp flag
4400         and associated warning.
4401         * testsuite/Makefile.in: Regenerate.
4402
4403 2021-06-23  Cassio Neri  <cassio.neri@gmail.com>
4404             Jonathan Wakely  <jwakely@redhat.com>
4405             Ulrich Drepper  <drepper@redhat.com>
4406
4407         * include/std/chrono (chrono::year::is_leap()): Optimize.
4408
4409 2021-06-23  Patrick Palka  <ppalka@redhat.com>
4410
4411         PR c++/86439
4412         * testsuite/23_containers/map/cons/deduction.cc: Replace ambiguous
4413         CTAD examples.
4414         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
4415         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
4416         Mention one of the replaced examples is broken due to PR101174.
4417         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
4418         * testsuite/23_containers/unordered_map/cons/deduction.cc: Replace
4419         ambiguous CTAD examples.
4420         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
4421         Likewise.
4422         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
4423         Likewise.
4424         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
4425
4426 2021-06-23  Jonathan Wakely  <jwakely@redhat.com>
4427
4428         * include/std/mutex (__detail::__try_lock_impl): Rename
4429         parameter to avoid clashing with newlib's __lockable macro.
4430         (try_lock): Add 'inline' specifier.
4431         * testsuite/17_intro/names.cc: Add check for __lockable.
4432         * testsuite/30_threads/try_lock/5.cc: Add options for pthreads.
4433
4434 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
4435             Matthias Kretz  <m.kretz@gsi.de>
4436
4437         * include/std/mutex (lock): Replace recursion with iteration
4438         when lockables all have the same type.
4439         (__detail::__try_lock_impl): Likewise. Pass lockables as
4440         parameters, instead of a tuple. Always lock the first one, and
4441         recurse for the rest.
4442         (__detail::__lock_impl): Adjust call to __try_lock_impl.
4443         (__detail::__try_to_lock): Remove.
4444         * testsuite/30_threads/lock/3.cc: Check that mutexes are locked.
4445         * testsuite/30_threads/lock/4.cc: Also test non-heterogeneous
4446         arguments.
4447         * testsuite/30_threads/unique_lock/cons/60497.cc: Also check
4448         std::try_lock.
4449         * testsuite/30_threads/try_lock/5.cc: New test.
4450
4451 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
4452
4453         * include/std/memory (declare_reachable, undeclare_reachable)
4454         (declare_no_pointers, undeclare_no_pointers, get_pointer_safety)
4455         (pointer_safety): Only define for C++11 to C++20 inclusive.
4456         * testsuite/20_util/pointer_safety/1.cc: Do not run for C++23.
4457
4458 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
4459
4460         * include/bits/random.h (seed_seq): Constrain initializer-list
4461         constructor.
4462         * include/bits/random.tcc (seed_seq): Add template parameter.
4463         * testsuite/26_numerics/random/seed_seq/cons/default.cc: Check
4464         for noexcept.
4465         * testsuite/26_numerics/random/seed_seq/cons/initlist.cc: Check
4466         constraints.
4467
4468 2021-06-22  Thomas Rodgers  <rodgert@appliantology.com>
4469
4470         PR libstdc++/100806
4471         * include/bits/semaphore_base.h (__atomic_semaphore::_M_release):
4472         Force _M_release() to wake all waiting threads.
4473         * testsuite/30_threads/semaphore/100806.cc: New test.
4474
4475 2021-06-21  Jonathan Wakely  <jwakely@redhat.com>
4476
4477         * include/std/mutex (__try_to_lock): Move to __detail namespace.
4478         (struct __try_lock_impl): Replace with ...
4479         (__detail::__try_lock_impl<Idx>(tuple<Lockables...>&)): New
4480         function templates to implement std::try_lock.
4481         (try_lock): Use new __try_lock_impl.
4482         (__detail::__lock_impl(int, int&, L0&, L1&...)): New function
4483         template to implement std::lock.
4484         (lock): Use __lock_impl.
4485
4486 2021-06-21  Patrick Palka  <ppalka@redhat.com>
4487
4488         * include/bits/ranges_cmp.h (__cpp_lib_ranges): Adjust value.
4489
4490 2021-06-20  Patrick Palka  <ppalka@redhat.com>
4491
4492         * include/std/ranges (__non_propagating_cache::operator bool):
4493         Define for split_view::begin().
4494         (split_view): Define as per P2210.
4495         (views::__detail::__can_split_view): Define.
4496         (views::_Split, views::split): Define.
4497         * testsuite/std/ranges/adaptors/100577.cc (test01, test02):
4498         Test views::split.
4499         * testsuite/std/ranges/adaptors/split.cc: New test.
4500         * testsuite/std/ranges/p2325.cc (test08a): New test.
4501         * testsuite/std/ranges/p2367.cc (test01): Test views::split.
4502
4503 2021-06-20  Patrick Palka  <ppalka@redhat.com>
4504
4505         * include/std/ranges: Rename views::split to views::lazy_split,
4506         split_view to lazy_split_view, etc. throughout.
4507         * testsuite/std/ranges/*: Likewise.
4508         * testsuite/std/ranges/adaptors/lazy_split.cc: New file.
4509         * testsuite/std/ranges/adaptors/lazy_split_neg.cc: New file.
4510
4511 2021-06-20  Patrick Palka  <ppalka@redhat.com>
4512
4513         * include/std/ranges (split_view::_OuterIter::__at_end):
4514         Check _M_trailing_empty.
4515         (split_view::_OuterIter::_M_trailing_empty): Define this
4516         data member.
4517         (split_view::_OuterIter::operator++): Set _M_trailing_empty
4518         appropriately.
4519         (split_view::_OuterIter::operator==): Compare
4520         _M_trailing_empty.
4521         * testsuite/std/ranges/adaptors/100479.cc (test03): Expect two
4522         split parts instead of one.
4523         * testsuite/std/ranges/adaptors/split.cc (test11): New test.
4524
4525 2021-06-20  Patrick Palka  <ppalka@redhat.com>
4526
4527         * include/std/ranges (split_view::_InnerIter::base): Define as
4528         per P2210.
4529
4530 2021-06-19  Patrick Palka  <ppalka@redhat.com>
4531
4532         * include/std/ranges (transform_view::_Iterator::_S_iter_concept):
4533         Consider _Base instead of _Vp as per LWG 3555.
4534         (elements_view::_Iterator::_S_iter_concept): Likewise.
4535
4536 2021-06-19  Patrick Palka  <ppalka@redhat.com>
4537
4538         * include/std/ranges (split_view::_OuterIter::value_type::begin):
4539         Remove the non-const overload, and remove the copyable constraint
4540         on the const overload as per LWG 3553.
4541
4542 2021-06-19  Patrick Palka  <ppalka@redhat.com>
4543
4544         * include/bits/stl_iterator.h
4545         (__detail::__common_iter_use_postfix_proxy): Add
4546         move_constructible constraint as per LWG 3546.
4547         (common_iterator::__postfix_proxy): Adjust initializer of
4548         _M_keep as per LWG 3546.
4549
4550 2021-06-18  Patrick Palka  <ppalka@redhat.com>
4551
4552         PR libstdc++/100387
4553         * include/bits/ranges_algo.h (__minmax_fn::operator()): Rewrite
4554         to limit comparison complexity to 3*N/2.
4555         (__minmax_element_fn::operator()): Likewise.
4556         (shift_right): Avoid premature std::move of __result.
4557         * testsuite/25_algorithms/minmax/constrained.cc (test04, test05):
4558         New tests.
4559         * testsuite/25_algorithms/minmax_element/constrained.cc (test02):
4560         Likewise.
4561
4562 2021-06-18  Patrick Palka  <ppalka@redhat.com>
4563
4564         * include/std/concepts (convertible_to): Just use declval as per
4565         LWG 3557.
4566
4567 2021-06-18  Jonathan Wakely  <jwakely@redhat.com>
4568
4569         PR libstdc++/95833
4570         * include/std/numeric (reduce(Iter, Iter, T, BinaryOp)): Replace
4571         incorrect static_assert with ones matching the 'Mandates'
4572         conditions in the standard.
4573         * testsuite/26_numerics/reduce/95833.cc: New test.
4574
4575 2021-06-18  Jonathan Wakely  <jwakely@redhat.com>
4576
4577         * testsuite/21_strings/basic_string/cons/char/1.cc: Use
4578         diagnostic pragma to suppress -Wstringop-overread error.
4579
4580 2021-06-18  Patrick Palka  <ppalka@redhat.com>
4581
4582         * include/bits/ranges_algo.h (__find_fn, find, __find_if_fn)
4583         (find_if, __find_if_not_fn, find_if_not, _in_in_result)
4584         (__mismatch_fn, mismatch, __search_fn, search): Move to ...
4585         * include/bits/ranges_util.h: ... here.
4586         * include/std/ranges (__detail::find, __detail::find_if)
4587         (__detail::find_if_not, __detail::mismatch): Remove.
4588         (filter_view): Use ranges::find_if instead.
4589         (drop_while_view): Use ranges::find_if_not instead.
4590         (split_view): Use ranges::find and ranges::mismatch instead.
4591
4592 2021-06-18  Patrick Palka  <ppalka@redhat.com>
4593
4594         * include/bits/iterator_concepts.h (weakly_incrementable): Remove
4595         default_initializable requirement.
4596         * include/bits/ranges_base.h (ranges::view): Likewise.
4597         * include/bits/ranges_util.h (subrange): Constrain the default
4598         ctor.
4599         * include/bits/stl_iterator.h (back_insert_iterator): Remove the
4600         default ctor.
4601         (front_insert_iterator): Likewise.
4602         (insert_iterator): Likewise.  Remove NSDMIs.
4603         (common_iterator): Constrain the default ctor.
4604         (counted_iterator): Likewise.
4605         * include/bits/stream_iterator.h (ostream_iterator): Remove the
4606         default ctor.
4607         * include/std/ranges (__detail::__box::operator=): Handle
4608         self-assignment in the primary template.
4609         (__detail::__box): In the partial specialization: adjust
4610         constraints as per P2325.  Add specialized operator= for the
4611         case when the wrapped type is not copyable.  Constrain the
4612         default ctor.  Avoid list-initialization.
4613         (single_view): Constraint the default ctor.
4614         (iota_view): Relax semiregular constraint to copyable.
4615         Constrain the default ctor.
4616         (iota_view::_Iterator): Constraint the default ctor.
4617         (basic_istream_view): Remove the default ctor.  Remove NSDMIs.
4618         Remove redundant checks for empty _M_stream.
4619         (basic_istream_view::_Iterator): Likewise.
4620         (ref_view): Remove the default ctor.  Remove NSDMIs.
4621         (ref_view::_Iterator): Constrain the default ctor.
4622         (__detail::__non_propagating_cache::operator=): Define overload
4623         for assigning from a value of the underlying type.
4624         (filter_view): Likewise.
4625         (filter_view::_Iterator): Likewise.
4626         (transform_view): Likewise.
4627         (transform_view::_Iterator): Likewise.
4628         (take_view): Likewise.
4629         (take_view::_Iterator): Likewise.
4630         (take_while_view): Likewise.
4631         (take_while_view::_Iterator): Likewise.
4632         (drop_while_view): Likewise.
4633         (drop_while_view::_Iterator): Likewise.
4634         (join_view): Likewise.
4635         (split_view::_OuterIter::__current): Adjust after changing the
4636         type of _M_current.
4637         (split_view::_M_current): Wrap it in a __non_propagating_cache.
4638         (split_view::split_view): Constrain the default ctor.
4639         (common_view): Constrain the default ctor.
4640         (reverse_view): Likewise.
4641         (elements_view): Likewise.
4642         * include/std/span (enable_view<span<_ElementType, _Extent>>):
4643         Define this partial specialization to true unconditionally.
4644         * include/std/version (__cpp_lib_ranges): Adjust value.
4645         * testsuite/24_iterators/back_insert_iterator/constexpr.cc:
4646         Don't attempt to default construct a back_insert_iterator.
4647         * testsuite/24_iterators/front_insert_iterator/constexpr.cc:
4648         Don't attempt to default construct a front_insert_iterator.
4649         * testsuite/24_iterators/insert_iterator/constexpr.cc:
4650         Don't attempt to default construct an insert_iterator.
4651         * testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
4652         Remove this test for default constructibility of ostream_iterator.
4653         * testsuite/std/ranges/97600.cc: Don't attempt to default
4654         construct a basic_istream_view.
4655         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc:
4656         Rename to ...
4657         * testsuite/std/ranges/adaptors/detail/copyable_box.cc: ... this.
4658         (test02): Adjust now that __box is copyable-box not
4659         semiregular-box.
4660         (test03): New test.
4661         * testsuite/std/ranges/p2325.cc: New test.
4662         * testsuite/std/ranges/single_view.cc (test06): New test.
4663         * testsuite/std/ranges/view.cc: Adjust now that view doesn't
4664         require default_initializable.
4665
4666 2021-06-17  Jonathan Wakely  <jwakely@redhat.com>
4667
4668         PR libstdc++/91488
4669         * include/bits/basic_string.h (__cpp_lib_constexpr_string): Only
4670         define when is_constant_evaluated is available.
4671         * include/bits/char_traits.h (__cpp_lib_constexpr_char_traits):
4672         Likewise.
4673         (__constant_string_p, __constant_array_p): Remove.
4674         (char_traits): Use is_constant_evaluated directly.
4675         * include/std/version (__cpp_lib_constexpr_char_traits)
4676         (__cpp_lib_constexpr_string): Only define when
4677         is_constant_evaluated is available.
4678
4679 2021-06-17  Patrick Palka  <ppalka@redhat.com>
4680
4681         PR libstdc++/100940
4682         * include/std/ranges (__adaptor::_Partial): For the "simple"
4683         forwarding partial specializations, also require that
4684         the extra arguments are trivially copyable.
4685         * testsuite/std/ranges/adaptors/100577.cc (test04): New test.
4686
4687 2021-06-17  Patrick Palka  <ppalka@redhat.com>
4688
4689         PR libstdc++/100940
4690         * include/std/ranges (__adaptor::_RangeAdaptor): Document the
4691         template form of _S_has_simple_extra_args.
4692         (__adaptor::__adaptor_has_simple_extra_args): Add _Args template
4693         parameter pack.  Try to treat _S_has_simple_extra_args as a
4694         variable template parameterized by _Args.
4695         (__adaptor::_Partial): Pass _Arg/_Args to the constraint
4696         __adaptor_has_simple_extra_args.
4697         (views::_Take::_S_has_simple_extra_args): Templatize according
4698         to the type of the extra argument.
4699         (views::_Drop::_S_has_simple_extra_args): Likewise.
4700         (views::_Split::_S_has_simple_extra_args): Define.
4701         * testsuite/std/ranges/adaptors/100577.cc (test01, test02):
4702         Adjust after changes to _S_has_simple_extra_args mechanism.
4703         (test03): Define.
4704
4705 2021-06-16  Jonathan Wakely  <jwakely@redhat.com>
4706
4707         * include/bits/iterator_concepts.h (__decay_copy): Name type.
4708
4709 2021-06-16  Jonathan Wakely  <jwakely@redhat.com>
4710
4711         * include/bits/ranges_base.h (ranges::begin, ranges::end)
4712         (ranges::cbegin, ranges::cend, ranges::rbeing, ranges::rend)
4713         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
4714         (ranges::empty, ranges::data, ranges::cdata): Remove final
4715         keywords and deleted operator& overloads.
4716         * testsuite/24_iterators/customization_points/iter_move.cc: Use
4717         new is_customization_point_object function.
4718         * testsuite/24_iterators/customization_points/iter_swap.cc:
4719         Likewise.
4720         * testsuite/std/concepts/concepts.lang/concept.swappable/swap.cc:
4721         Likewise.
4722         * testsuite/std/ranges/access/begin.cc: Likewise.
4723         * testsuite/std/ranges/access/cbegin.cc: Likewise.
4724         * testsuite/std/ranges/access/cdata.cc: Likewise.
4725         * testsuite/std/ranges/access/cend.cc: Likewise.
4726         * testsuite/std/ranges/access/crbegin.cc: Likewise.
4727         * testsuite/std/ranges/access/crend.cc: Likewise.
4728         * testsuite/std/ranges/access/data.cc: Likewise.
4729         * testsuite/std/ranges/access/empty.cc: Likewise.
4730         * testsuite/std/ranges/access/end.cc: Likewise.
4731         * testsuite/std/ranges/access/rbegin.cc: Likewise.
4732         * testsuite/std/ranges/access/rend.cc: Likewise.
4733         * testsuite/std/ranges/access/size.cc: Likewise.
4734         * testsuite/std/ranges/access/ssize.cc: Likewise.
4735         * testsuite/util/testsuite_iterators.h
4736         (is_customization_point_object): New function.
4737
4738 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
4739
4740         * include/bits/ranges_base.h (ranges::begin, ranges::end)
4741         (ranges::cbegin, ranges::cend, ranges::rbeing, ranges::rend)
4742         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
4743         (ranges::empty, ranges::data, ranges::cdata): Make types final.
4744         Add deleted operator& overloads.
4745         (ranges::advance, ranges::distance, ranges::next, ranges::prev):
4746         Likewise.
4747         * testsuite/std/ranges/headers/ranges/synopsis.cc: Replace
4748         ill-formed & expressions with using-declarations. Add checks for
4749         other function objects.
4750
4751 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
4752
4753         * include/bits/ranges_util.h (view_interface): Add noexcept to
4754         empty, operator bool, data and size members.
4755         (subrange): Add noexcept to constructors.
4756         * include/std/ranges (single_view, ref_view): Add noexcept to
4757         constructors.
4758         (views::single, views::all): Add noexcept.
4759         * testsuite/std/ranges/adaptors/all.cc: Check noexcept.
4760         * testsuite/std/ranges/single_view.cc: Likewise.
4761
4762 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
4763
4764         * include/bits/ranges_util.h (subrange): Add __size_type typedef
4765         and use it to simplify declarations.
4766         (subrange(i, s, n)): Remove assertion.
4767         * testsuite/std/ranges/subrange/constexpr.cc: New test.
4768
4769 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
4770
4771         * include/bits/iterator_concepts.h (__cust_access::__decay_copy):
4772         Replace with function object.
4773         (__cust_access::__member_begin, ___cust_access::_adl_begin): Use
4774         __decay_copy unqualified.
4775         * include/bits/ranges_base.h (__member_end, __adl_end):
4776         Likewise. Use __range_iter_t for type of ranges::begin.
4777         (__member_rend): Use correct value category for rbegin argument.
4778         (__member_data): Use __decay_copy unqualified.
4779         (__begin_data): Use __range_iter_t for type of ranges::begin.
4780
4781 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4782
4783         * include/bits/ranges_base.h (ranges::empty): Check whether
4784         conversion to bool can throw.
4785         * testsuite/std/ranges/access/empty.cc: Check for correct
4786         noexcept-specifier.
4787
4788 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4789
4790         PR libstdc++/100894
4791         * include/std/type_traits (__common_ref_impl<X&, Y&>): Only
4792         use the type if it's a reference.
4793         * testsuite/20_util/common_reference/100894.cc: New test.
4794
4795 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4796
4797         * testsuite/experimental/filesystem/path/native/conv_c++23.cc:
4798         Add dg-require-filesystem-ts directive.
4799
4800 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4801
4802         PR libstdc++/101034
4803         * include/std/any (any(in_place_t<T>, initializer_list<U>, A&&...))
4804         (any::emplace<T>(initializer_list<U>, A&&...)): Fix constraint
4805         to use lvalue.
4806         * testsuite/20_util/any/cons/101034.cc: New test.
4807
4808 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4809
4810         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Add
4811         -std=gnu++17 option.
4812
4813 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4814
4815         PR libstdc++/101056
4816         * libsupc++/compare (compare_partial_order_fallback): Add
4817         constraint using reversed parameter order, as per LWG 3465.
4818         * testsuite/18_support/comparisons/algorithms/fallback.cc:
4819         Adjust expected result.
4820
4821 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4822
4823         * libsupc++/compare (__decayed_same_as): New helper concept.
4824         (strong_order, weak_order, partial_order): Constrain with new
4825         concept instead of using static_assert.
4826         (compare_strong_order_fallback, compare_weak_order_fallback)
4827         (compare_partial_order_fallback): Likewise. Do not deduce return
4828         types. Remove redundant if-constexpr checks.
4829         * testsuite/18_support/comparisons/algorithms/fallback.cc: New test.
4830
4831 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4832
4833         PR libstdc++/101055
4834         * include/std/tuple: Use reserved form of attribute name.
4835         * testsuite/17_intro/headers/c++2011/all_attributes.cc: Add
4836         check for no_unique_address.
4837         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
4838         Likewise.
4839         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
4840         Likewise.
4841
4842 2021-06-11  Jonathan Wakely  <jwakely@redhat.com>
4843
4844         * include/bits/fs_path.h (operator==, operator<=>): Use new
4845         _S_compare function.
4846         (path::_S_compare): New function to call path::compare in a
4847         context where path::iterator is complete.
4848         * include/experimental/bits/fs_path.h (operator<, operator==):
4849         Define after path::iterator is complete.
4850         * testsuite/27_io/filesystem/path/native/conv_c++23.cc: New
4851         test.
4852         * testsuite/experimental/filesystem/path/native/conv_c++23.cc:
4853         New test.
4854
4855 2021-06-09  Thomas Rodgers  <rodgert@appliantology.com>
4856
4857         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Guard
4858         test logic with constexpr check for is_always_lock_free.
4859
4860 2021-06-09  Jonathan Wakely  <jwakely@redhat.com>
4861
4862         PR libstdc++/100982
4863         * include/std/optional (optional::operator=(const optional<U>&)):
4864         Fix value category used in is_assignable check.
4865         * testsuite/20_util/optional/assignment/100982.cc: New test.
4866
4867 2021-06-09  Jonathan Wakely  <jwakely@redhat.com>
4868
4869         * include/bits/allocator.h (allocator::is_always_equal): Deprecate.
4870         * include/bits/iterator_concepts.h (indirectly_readable_traits):
4871         Add LWG issue number to comment.
4872         * include/std/memory_resource (polymorphic_allocator::release):
4873         Deprecate.
4874         * testsuite/20_util/allocator/requirements/typedefs.cc: Add
4875         dg-warning for deprecation. Also check std::allocator<void>.
4876
4877 2021-06-08  Thomas Rodgers  <rodgert@appliantology.com>
4878
4879         PR libstdc++/100889
4880         * include/bits/atomic_base.h (atomic_ref<_Tp*>::wait):
4881         Change parameter type from _Tp to _Tp*.
4882         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Extend
4883         coverage of types tested.
4884
4885 2021-06-08  Thomas Rodgers  <rodgert@appliantology.com>
4886
4887         * include/std/barrier (__tree_barrier::_M_arrive): Remove
4888         unnecessary hasher instantiation.
4889
4890 2021-06-08  Jonathan Wakely  <jwakely@redhat.com>
4891
4892         * include/experimental/propagate_const (swap): Constrain.
4893         * testsuite/experimental/propagate_const/swap/lwg3413.cc: New test.
4894
4895 2021-06-07  Avi Kivity  <avi@scylladb.com>
4896
4897         PR libstdc++/100900
4898         * include/std/ranges (elements_view::__iter_cat::_S_iter_cat):
4899         Add missing typename.
4900
4901 2021-06-07  Jonathan Wakely  <jwakely@redhat.com>
4902
4903         PR libstdc++/98842
4904         * include/std/optional (operator<=>(const optional<T>& const U&)):
4905         Add missing constraint and add workaround for template
4906         recursion.
4907         * testsuite/20_util/optional/relops/three_way.cc: Check that
4908         type without equality comparison cannot be compared when wrapped
4909         in std::optional.
4910
4911 2021-06-05  Jonathan Wakely  <jwakely@redhat.com>
4912
4913         PR libstdc++/100824
4914         * include/bits/ranges_base.h (_SSize): Return signed type.
4915         * testsuite/std/ranges/access/ssize.cc: Check with __int128.
4916
4917 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
4918
4919         * include/bits/ranges_base.h (_SSize): Return the result of
4920         ranges::size converted to the wider of make-signed-like-t<S> and
4921         ptrdiff_t, rather than the ranges different type.
4922         * testsuite/std/ranges/access/ssize.cc: Adjust expected result
4923         for an iota_view that uses an integer class type for its
4924         difference_type.
4925
4926 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
4927
4928         PR libstdc++/100824
4929         * include/bits/ranges_base.h (__member_data): Use __decay_copy.
4930         * testsuite/std/ranges/access/data.cc: Add testcase from PR.
4931
4932 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
4933
4934         PR libstdc++/100824
4935         * include/bits/iterator_concepts.h (__detail::__decay_copy)
4936         (__detail::__member_begin, __detail::__adl_begin): Move to
4937         namespace ranges::__cust_access.
4938         (__detail::__ranges_begin): Likewise, and rename to __begin.
4939         Remove redundant static assertion.
4940         * include/bits/ranges_base.h (_Begin, _End, _RBegin, _REnd):
4941         Use lvalue in noexcept specifier.
4942         (__as_const): Add non-deduced parameter for value category.
4943         (_CBegin, _CEnd, _CRBegin, _CREnd, _CData): Adjust uses of
4944         __as_const.
4945         (__member_size, __adl_size, __member_empty, __size0_empty):
4946         (__eq_iter_empty, __adl_data): Use lvalue objects in
4947         requirements.
4948         (__sentinel_size): Likewise. Add check for conversion to
4949         unsigned-like.
4950         (__member_data): Allow non-lvalue types to satisfy the concept,
4951         but use lvalue object in requirements.
4952         (_Size, _SSize): Remove forwarding to always use an lvalue.
4953         (_Data): Likewise. Add static assertion for arrays.
4954         * testsuite/std/ranges/access/cdata.cc: Adjust expected
4955         behaviour for rvalues. Add negative tests for ill-formed
4956         expressions.
4957         * testsuite/std/ranges/access/data.cc: Likewise.
4958         * testsuite/std/ranges/access/empty.cc: Adjust expected
4959         behaviour for rvalues.
4960         * testsuite/std/ranges/access/size.cc: Likewise.
4961
4962 2021-06-04  Tim Adye  <Tim.Adye@cern.ch>
4963
4964         * include/std/any (any::_Manager::_S_access): New static
4965         function to access the contained value.
4966         (any::emplace, __any_caster): Use _S_access member of the
4967         manager type.
4968
4969 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
4970
4971         * doc/xml/manual/status_cxx2020.xml:
4972         * doc/html/*: Regenerate.
4973         * include/bits/hashtable.h (__cpp_lib_generic_unordered_lookup):
4974         Define.
4975         * include/std/version (__cpp_lib_generic_unordered_lookup):
4976         Define.
4977         * testsuite/23_containers/unordered_map/operations/1.cc: Check
4978         feature test macro.
4979         * testsuite/23_containers/unordered_set/operations/1.cc:
4980         Likewise.
4981
4982 2021-06-03  Patrick Palka  <ppalka@redhat.com>
4983
4984         * include/bits/ranges_algo.h (__detail::__can_reread_output):
4985         Factor out this concept from ...
4986         (__unique_copy_fn::operator()): ... here.  Use the concept
4987         throughout.
4988         * testsuite/std/ranges/range.cc: Remove now ill-formed use
4989         of range_value_t on an output_range.
4990         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper):
4991         Define value_type, pointer and reference member types to void.
4992
4993 2021-06-03  Patrick Palka  <ppalka@redhat.com>
4994
4995         PR libstdc++/100577
4996         * include/std/ranges (_RangeAdaptorClosure): Document
4997         _S_has_simple_call_op mechanism.
4998         (_RangeAdaptor): Document _S_has_simple_extra_args mechanism.
4999         (__closure_has_simple_call_op): New concept.
5000         (__adaptor_has_simple_extra_args): Likewise.
5001         (_Partial<_Adaptor, _Args...>): New partial specialization.
5002         (_Partial<_Adaptor, _Arg>): Likewise.
5003         (_Pipe<_Lhs, _Rhs>): Likewise.
5004         (views::_All::_S_has_simple_call_op): Define to true.
5005         (views::_Filter::_S_has_simple_extra_args): Likewise.
5006         (views::_Transform::_S_has_simple_extra_args): Likewise.
5007         (views::_Take::_S_has_simple_extra_args): Likewise.
5008         (views::_TakeWhile::_S_has_simple_extra_args): Likewise.
5009         (views::_Drop::_S_has_simple_extra_args): Likewise.
5010         (views::_DropWhile::_S_has_simple_extra_args): Likewise.
5011         (views::_Join::_S_has_simple_call_op): Likewise.
5012         (views::_Split): Document why we don't define
5013         _S_has_simple_extra_args to true for this adaptor.
5014         (views::_Common::_S_has_simple_call_op): Define to true.
5015         (views::_Reverse::_S_has_simple_call_op): Likewise.
5016         (views::_Elements::_S_has_simple_call_op): Likewise.
5017         * testsuite/std/ranges/adaptors/100577.cc: New test.
5018
5019 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
5020
5021         PR libstdc++/100863
5022         PR libstdc++/65816
5023         * include/bits/hashtable_policy.h (_Hashtable_ebo_helper):
5024         Value-initialize subobject.
5025         * testsuite/23_containers/unordered_map/allocator/default_init.cc:
5026         Remove XFAIL.
5027         * testsuite/23_containers/unordered_set/allocator/default_init.cc:
5028         Remove XFAIL.
5029
5030 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
5031
5032         PR libstdc++/96088
5033         * testsuite/23_containers/unordered_map/96088.cc: Adjust
5034         expected number of allocations.
5035         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
5036
5037 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
5038
5039         * doc/xml/manual/status_cxxis29124.xml: Improve punctuation.
5040         * doc/xml/manual/status_cxxtr1.xml: Likewise.
5041         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
5042         * doc/html/*: Regenerate.
5043
5044 2021-06-01  Patrick Palka  <ppalka@redhat.com>
5045
5046         PR c++/65816
5047         * testsuite/23_containers/deque/allocator/default_init.cc,
5048         testsuite/23_containers/forward_list/allocator/default_init.cc,
5049         testsuite/23_containers/list/allocator/default_init.cc,
5050         testsuite/23_containers/map/allocator/default_init.cc,
5051         testsuite/23_containers/set/allocator/default_init.cc,
5052         testsuite/23_containers/vector/allocator/default_init.cc,
5053         testsuite/23_containers/vector/bool/allocator/default_init.cc:
5054         Remove xfail.
5055
5056 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
5057
5058         * testsuite/23_containers/unordered_map/96088.cc: Change
5059         effective target to c++17.
5060         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
5061
5062 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
5063
5064         * testsuite/22_locale/ctype/is/string/89728_neg.cc: Only test
5065         isblank for C++11 and later.
5066
5067 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
5068
5069         PR libstdc++/100833
5070         * include/bits/ranges_base.h (ranges::advance(iter, n, sentinel)):
5071         Fix return value for no-op case.
5072         * testsuite/24_iterators/range_operations/advance.cc: Test
5073         return values of three-argument overload.
5074
5075 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
5076
5077         PR libstdc++/99453
5078         * python/Makefile.am: Use archive name for printer hook if no
5079         dynamic library name is available.
5080         * python/Makefile.in: Regenerate.
5081
5082 2021-05-30  Gerald Pfeifer  <gerald@pfeifer.com>
5083
5084         * doc/xml/manual/abi.xml: Remove dead reference to "Intel
5085         Compilers for Linux: Compatibility with GNU Compilers" article.
5086         * doc/html/manual/abi.html: Regenerate.
5087
5088 2021-05-26  François Dumont  <fdumont@gcc.gnu.org>
5089
5090         * include/debug/formatter.h
5091         (_Error_formatter::_Parameter::_Named): New.
5092         (_Error_formatter::_Parameter::_Type): Inherit latter.
5093         (_Error_formatter::_Parameter::_M_integer): Likewise.
5094         (_Error_formatter::_Parameter::_M_string): Likewise.
5095         * src/c++11/debug.cc: Include <cstring>.
5096         (_Print_func_t): New.
5097         (print_raw(PrintContext&, const char*, ptrdiff_t)): New.
5098         (print_word): Use '%.*s' format in fprintf to render only expected number of chars.
5099         (pretty_print(PrintContext&, const char*, _Print_func_t)): New.
5100         (print_type): Rename in...
5101         (print_type_info): ...this. Use pretty_print.
5102         (print_address, print_integer): New.
5103         (print_named_name, print_iterator_constness, print_iterator_state): New.
5104         (print_iterator_seq_type): New.
5105         (print_named_field, print_type_field, print_instance_field, print_iterator_field): New.
5106         (print_field): Use latters.
5107         (print_quoted_named_name, print_type_type, print_type, print_instance): New.
5108         (print_string(PrintContext&, const char*, const _Parameter*, size_t)):
5109         Change signature to...
5110         (print_string(PrintContext&, const char*, ptrdiff_t, const _Parameter*, size_t)):
5111         ...this and adapt. Remove intermediate buffer to render input string.
5112         (print_string(PrintContext&, const char*, ptrdiff_t)): New.
5113
5114 2021-05-26  Jonathan Wakely  <jwakely@redhat.com>
5115
5116         PR libstdc++/100768
5117         * include/bits/ranges_base.h (advance, distance, next, prev):
5118         Replace function templates with function objects.
5119         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
5120         Adjust for changes to function objects.
5121         * testsuite/std/ranges/adaptors/elements.cc: Add using
5122         declarations for names from namespace ranges.
5123         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
5124         * testsuite/24_iterators/range_operations/100768.cc: New test.
5125
5126 2021-05-24  François Dumont  <fdumont@gcc.gnu.org>
5127
5128         PR libstdc++/96088
5129         * include/bits/hashtable_policy.h (_Select2nd): New.
5130         (_NodeBuilder<>): New.
5131         (_ReuseOrAllocNode<>::operator()): Use variadic template args.
5132         (_AllocNode<>::operator()): Likewise.
5133         * include/bits/hashtable.h
5134         (_Hashtable<>::__node_builder_t): New.
5135         (_Hashtable<>::_M_insert_unique<>(_Kt&&, _Arg&&, const _NodeGenerator&)):
5136          New.
5137         (_Hashtable<>::_S_forward_key): New.
5138         (_Hashtable<>::_M_insert): Use latter.
5139         (_Hashtable<>::_M_insert(const_iterator, _Arg&&, const _NodeGenerator&, false_type)):
5140         Instantiate node first, compute hash code second.
5141         * testsuite/23_containers/unordered_map/96088.cc: New test.
5142         * testsuite/23_containers/unordered_multimap/96088.cc: New test.
5143         * testsuite/23_containers/unordered_multiset/96088.cc: New test.
5144         * testsuite/23_containers/unordered_set/96088.cc: New test.
5145         * testsuite/util/replacement_memory_operators.h
5146         (counter::_M_increment): New.
5147         (counter::_M_decrement): New.
5148         (counter::reset()): New.
5149
5150 2021-05-24  Patrick Palka  <ppalka@redhat.com>
5151
5152         PR libstdc++/100479
5153         * include/std/ranges (__detail::__non_propagating_cache): Move
5154         definition up to before that of _CachedPosition.  Make base
5155         class _Optional_base protected instead of private.  Add const
5156         overload for operator*.
5157         (__detail::_CachedPosition): Rewrite the partial specialization
5158         for forward ranges as a derived class of __non_propagating_cache.
5159         Remove the size constraint on the partial specialization for
5160         random access ranges.  Add copy/move/copy-assignment/move-assignment
5161         members to the offset partial specialization for random
5162         access ranges that propagate the cached value but additionally
5163         invalidate it in the source object on move.
5164         * testsuite/std/ranges/adaptors/100479.cc: New test.
5165
5166 2021-05-24  Jonathan Wakely  <jwakely@redhat.com>
5167
5168         * testsuite/25_algorithms/inplace_merge/constrained.cc: Qualify
5169         call to ranges::next.
5170         * testsuite/25_algorithms/is_sorted/constrained.cc: Likewise.
5171         * testsuite/25_algorithms/is_sorted_until/constrained.cc:
5172         Likewise.
5173         * testsuite/25_algorithms/swap_ranges/1.cc: Qualify call to
5174         swap_ranges.
5175
5176 2021-05-21  Patrick Palka  <ppalka@redhat.com>
5177
5178         PR libstdc++/100606
5179         * include/std/ranges (drop_while_view::begin): Assert the
5180         precondition added by LWG 3490.
5181
5182 2021-05-21  Patrick Palka  <ppalka@redhat.com>
5183
5184         PR libstdc++/100690
5185         * include/std/ranges (iota_view::_Sentinel::_M_distance_from):
5186         Split out this member function from ...
5187         (iota_view::_Sentinel::operator-): ... here, for sake of access
5188         control.
5189         * testsuite/std/ranges/iota/iota_view.cc (test05): New test.
5190
5191 2021-05-20  Jonathan Wakely  <jwakely@redhat.com>
5192
5193         * include/bits/random.tcc (__representable_as_double)
5194         (__p1_representable_as_double): Add "" to static asserts.
5195
5196 2021-05-20  Jonathan Wakely  <jwakely@redhat.com>
5197
5198         PR libstdc++/100676
5199         * include/bits/c++config (__glibcxx_assert_1): Rename to ...
5200         (__glibcxx_constexpr_assert): ... this.
5201         (__glibcxx_assert_impl): Use __glibcxx_constexpr_assert.
5202         (__glibcxx_assert): Define as either __glibcxx_constexpr_assert
5203         or __glibcxx_assert_impl.
5204         (__glibcxx_assert_2): Remove
5205         * include/debug/macros.h (_GLIBCXX_DEBUG_VERIFY_AT_F): Use
5206         __glibcxx_constexpr_assert instead of __glibcxx_assert_1.
5207         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
5208         Adjust expected error.
5209         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
5210         Likewise.
5211         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
5212         Likewise.
5213         Likewise.
5214         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
5215         Likewise.
5216         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
5217         Likewise.
5218         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
5219         Likewise.
5220         * testsuite/23_containers/span/back_neg.cc: Likewise.
5221         * testsuite/23_containers/span/front_neg.cc: Likewise.
5222         * testsuite/23_containers/span/index_op_neg.cc: Likewise.
5223
5224 2021-05-20  Patrick Palka  <ppalka@redhat.com>
5225
5226         PR libstdc++/100639
5227         * include/bits/stl_iterator.h (reverse_iterator::difference_type):
5228         In C++20 mode, define in terms of iter_difference_t as per P0896R4.
5229         (reverse_iterator::reference): Likewise, but with iter_reference_t.
5230         (reverse_iterator::value_type): Likewise, but with iter_value_t.
5231         * testsuite/std/ranges/adaptors/reverse.cc (test08): New test.
5232         * testsuite/24_iterators/reverse_iterator/100639.cc: New test.
5233
5234 2021-05-20  Joern Rennecke  <joern.rennecke@riscy-ip.com>
5235
5236         PR libstdc++/100361
5237         * include/std/charconv (to_chars): Hide the overloads for
5238         floating-point types for 16 bit targets.
5239         * src/c++17/floating_to_chars.cc: Don't compile for 16 bit targets.
5240         * testsuite/20_util/to_chars/double.cc: Run this test only on
5241         size32plus targets.
5242         * testsuite/20_util/to_chars/float.cc: Likewise.
5243         * testsuite/20_util/to_chars/long_double.cc: Likewise.
5244
5245 2021-05-18  Patrick Palka  <ppalka@redhat.com>
5246
5247         PR libstdc++/100631
5248         * include/std/ranges (elements_view::_Sentinel::operator-): Use
5249         _M_distance_from in the other operator- overload too.
5250         * testsuite/std/ranges/adaptors/elements.cc (test06): Augment test.
5251
5252 2021-05-18  Thomas Schwinge  <thomas@codesourcery.com>
5253
5254         * testsuite/lib/prune.exp: Add note about 'dg-note'.
5255
5256 2021-05-18  Patrick Palka  <ppalka@redhat.com>
5257
5258         PR libstdc++/100475
5259         * include/std/ranges (__box::__box): Use non-list-initialization
5260         in member initializer list of in-place constructor of the
5261         partial specialization for semiregular types.
5262         (__box::operator->): Use std::__addressof.
5263         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc
5264         (test02): New test.
5265         * testsuite/std/ranges/single_view.cc (test04): New test.
5266
5267 2021-05-18  Patrick Palka  <ppalka@redhat.com>
5268
5269         PR libstdc++/100621
5270         * include/std/ranges (reverse_view::_S_needs_cached_begin):
5271         Set to true if the underlying non-common random-access range
5272         doesn't have a sized sentinel.
5273
5274 2021-05-18  Patrick Palka  <ppalka@redhat.com>
5275
5276         PR libstdc++/100631
5277         * include/std/ranges (elements_view::_Iterator): Also befriend
5278         _Sentinel<!_Const>.
5279         (elements_view::_Sentinel::_M_equal): Templatize.
5280         (elements_view::_Sentinel::_M_distance_from): Split out from ...
5281         (elements_view::_Sentinel::operator-): ... here.  Depend on
5282         _Base2 instead of _Base in the return type.
5283         * testsuite/std/ranges/adaptors/elements.cc (test06, test07):
5284         New tests.
5285
5286 2021-05-17  Thomas Rodgers  <rodgert@twrodgers.com>
5287
5288         * include/bits/atomic_wait.h (__waiter::_M_do_wait_v): loop
5289         until value change observed.
5290         (__waiter_base::_M_laundered): New member.
5291         (__waiter_base::_M_notify): Check _M_laundered to determine
5292         whether to wake one or all.
5293         (__detail::__atomic_compare): Return true if call to
5294         __builtin_memcmp() == 0.
5295         (__waiter_base::_S_do_spin_v): Adjust predicate.
5296         * testsuite/29_atomics/atomic/wait_notify/100334.cc: New
5297         test.
5298
5299 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
5300
5301         PR libstdc++/100630
5302         * include/experimental/bits/fs_path.h (__is_constructible_from):
5303         Test construction from a const lvalue, not an rvalue.
5304         * testsuite/27_io/filesystem/path/construct/100630.cc: New test.
5305         * testsuite/experimental/filesystem/path/construct/100630.cc:
5306         New test.
5307
5308 2021-05-17  Antony Polukhin  <antoshkka@gmail.com>
5309
5310         PR libstdc++/89728
5311         * include/bits/locale_facets.h (ctype<basic_string<C,T,A>>):
5312         Declare (but do not define) partial specialization.
5313         * testsuite/22_locale/ctype/is/string/89728_neg.cc: New test.
5314
5315 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
5316
5317         * include/std/thread (jthread::_S_create): Fix static assert
5318         message.
5319         * testsuite/30_threads/jthread/95989.cc: Re-enable test.
5320         * testsuite/30_threads/jthread/jthread.cc: Do not require
5321         pthread effective target.
5322         * testsuite/30_threads/jthread/2.cc: Moved to...
5323         * testsuite/30_threads/jthread/version.cc: ...here.
5324
5325 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
5326
5327         * doc/Makefile.am: Simplify doxygen recipes and use --latex_cmd.
5328         * doc/Makefile.in: Regenerate.
5329         * doc/doxygen/user.cfg.in (LATEX_CMD_NAME): Add placeholder
5330         value.
5331         * scripts/run_doxygen (print_usage): Always print to stdout and
5332         do not exit.
5333         (fail): New function for exiting on error.
5334         (parse_options): Handle --latex_cmd. Do not treat --help the
5335         same as errors. Simplify handling of required arguments.
5336
5337 2021-05-12  Jonathan Wakely  <jwakely@redhat.com>
5338
5339         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc:
5340         Increase dg-timeout-factor to 4. Fix -Wunused-parameter
5341         warnings. Replace bitwise AND with logical AND in loop
5342         condition.
5343         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc:
5344         Replace bitwise AND with logical AND in loop condition.
5345         * testsuite/util/pstl/test_utils.h: Remove unused parameter
5346         names.
5347
5348 2021-05-11  Patrick Palka  <ppalka@redhat.com>
5349
5350         * src/c++17/ryu/LOCAL_PATCHES: Update.
5351         * src/c++17/ryu/ryu_generic_128.h: Remove extern "C".
5352         Remove declarations for never-defined functions.
5353         * testsuite/20_util/to_chars/4.cc: New test.
5354
5355 2021-05-11  Jonathan Wakely  <jwakely@redhat.com>
5356
5357         * testsuite/20_util/headers/memory/synopsis.cc: Define C++98
5358         alternative for macro.
5359         * testsuite/20_util/shared_ptr/creation/99006.cc: Add effective
5360         target keyword.
5361         * testsuite/25_algorithms/copy/debug/99402.cc: Avoid C++11
5362         syntax.
5363
5364 2021-05-11  Jonathan Wakely  <jwakely@redhat.com>
5365
5366         * include/bits/allocator.h (allocator<void>) [C++20]: Add
5367         missing noexcept to constructor. Restore missing POCMA and
5368         is_always_equal_traits.
5369         [C++17]: Make construct and destroy members private and
5370         declare allocator_traits as a friend.
5371         * include/bits/memoryfwd.h (allocator_traits): Declare.
5372         * include/ext/malloc_allocator.h (malloc_allocator::allocate):
5373         Add nodiscard attribute. Add static assertion for LWG 3307.
5374         * include/ext/new_allocator.h (new_allocator::allocate): Add
5375         static assertion for LWG 3307.
5376         * testsuite/20_util/allocator/void.cc: Check that converting
5377         constructor is noexcept. Check for propagation traits and
5378         size_type and difference_type. Check that pointer and
5379         const_pointer are gone in C++20.
5380
5381 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5382
5383         * include/std/stop_token: Remove TODO comment.
5384
5385 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5386
5387         * include/bits/shared_ptr_base.h (__shared_count(unique_ptr&&)):
5388         Initialize a non-reference deleter from an rvalue, as per LWG
5389         3548.
5390         (__shared_ptr::_UniqCompatible): Add missing constraint.
5391         * testsuite/20_util/shared_ptr/cons/lwg3548.cc: New test.
5392         * testsuite/20_util/shared_ptr/cons/unique_ptr_deleter.cc: Check
5393         constraints.
5394
5395 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5396
5397         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Remove
5398         -std=gnu++17 from dg-options directive.
5399         * testsuite/17_intro/headers/c++2017/all_no_exceptions.cc:
5400         Likewise.
5401         * testsuite/17_intro/headers/c++2017/all_pedantic_errors.cc:
5402         Likewise.
5403         * testsuite/17_intro/headers/c++2017/operator_names.cc:
5404         Likewise.
5405         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: Likewise.
5406         * testsuite/17_intro/headers/c++2017/stdc++.cc: Likewise.
5407         * testsuite/17_intro/headers/c++2017/stdc++_multiple_inclusion.cc:
5408         Likewise.
5409         * testsuite/18_support/aligned_alloc/aligned_alloc.cc: Likewise.
5410         * testsuite/18_support/byte/81076.cc: Likewise.
5411         * testsuite/18_support/byte/global_neg.cc: Likewise.
5412         * testsuite/18_support/byte/ops.cc: Likewise.
5413         * testsuite/18_support/byte/requirements.cc: Likewise.
5414         * testsuite/18_support/headers/cfloat/values_c++17.cc: Likewise.
5415         * testsuite/18_support/launder/1.cc: Likewise.
5416         * testsuite/18_support/launder/nodiscard.cc: Likewise.
5417         * testsuite/18_support/launder/requirements.cc: Likewise.
5418         * testsuite/18_support/launder/requirements_neg.cc: Likewise.
5419         * testsuite/18_support/new_aligned.cc: Likewise.
5420         * testsuite/18_support/uncaught_exceptions/uncaught_exceptions.cc:
5421         Likewise.
5422         * testsuite/19_diagnostics/error_code/is_error_code_v.cc:
5423         Likewise.
5424         * testsuite/19_diagnostics/error_condition/hash.cc: Likewise.
5425         * testsuite/20_util/addressof/requirements/constexpr.cc:
5426         Likewise.
5427         * testsuite/20_util/as_const/1.cc: Likewise.
5428         * testsuite/20_util/as_const/rvalue_neg.cc: Likewise.
5429         * testsuite/20_util/bind/83427.cc: Likewise.
5430         * testsuite/20_util/bind/is_placeholder_v.cc: Likewise.
5431         * testsuite/20_util/bool_constant/requirements.cc: Likewise.
5432         * testsuite/20_util/duration/arithmetic/constexpr_c++17.cc:
5433         Likewise.
5434         * testsuite/20_util/duration/requirements/treat_as_floating_point_v.cc:
5435         Likewise.
5436         * testsuite/20_util/duration_cast/rounding.cc: Likewise.
5437         * testsuite/20_util/enable_shared_from_this/members/weak_from_this.cc:
5438         Likewise.
5439         * testsuite/20_util/from_chars/1_neg.cc: Likewise.
5440         * testsuite/20_util/from_chars/requirements.cc: Likewise.
5441         * testsuite/20_util/function/91456.cc: Likewise.
5442         * testsuite/20_util/function/cons/deduction.cc: Likewise.
5443         * testsuite/20_util/function_objects/83607.cc: Likewise.
5444         * testsuite/20_util/function_objects/invoke/59768.cc: Likewise.
5445         * testsuite/20_util/function_objects/mem_fn/80478.cc: Likewise.
5446         * testsuite/20_util/function_objects/not_fn/1.cc: Likewise.
5447         * testsuite/20_util/function_objects/not_fn/87538.cc: Likewise.
5448         * testsuite/20_util/has_unique_object_representations/requirements/explicit_instantiation.cc:
5449         Likewise.
5450         * testsuite/20_util/has_unique_object_representations/requirements/typedefs.cc:
5451         Likewise.
5452         * testsuite/20_util/has_unique_object_representations/value.cc:
5453         Likewise.
5454         * testsuite/20_util/hash/nullptr.cc: Likewise.
5455         * testsuite/20_util/in_place/requirements.cc: Likewise.
5456         * testsuite/20_util/is_aggregate/incomplete_neg.cc: Likewise.
5457         * testsuite/20_util/is_aggregate/requirements/explicit_instantiation.cc:
5458         Likewise.
5459         * testsuite/20_util/is_aggregate/requirements/typedefs.cc:
5460         Likewise.
5461         * testsuite/20_util/is_aggregate/value.cc: Likewise.
5462         * testsuite/20_util/is_invocable/83395.cc: Likewise.
5463         * testsuite/20_util/is_invocable/91456.cc: Likewise.
5464         * testsuite/20_util/is_invocable/requirements/explicit_instantiation.cc:
5465         Likewise.
5466         * testsuite/20_util/is_invocable/requirements/typedefs.cc:
5467         Likewise.
5468         * testsuite/20_util/is_invocable/value.cc: Likewise.
5469         * testsuite/20_util/is_literal_type/deprecated-1z.cc: Likewise.
5470         * testsuite/20_util/is_nothrow_constructible/94003.cc: Likewise.
5471         * testsuite/20_util/is_nothrow_invocable/83395.cc: Likewise.
5472         * testsuite/20_util/is_nothrow_invocable/requirements/explicit_instantiation.cc:
5473         Likewise.
5474         * testsuite/20_util/is_nothrow_invocable/requirements/typedefs.cc: Likewise.
5475         * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise.
5476         * testsuite/20_util/is_nothrow_swappable/requirements/explicit_instantiation.cc:
5477         Likewise.
5478         * testsuite/20_util/is_nothrow_swappable/requirements/typedefs.cc:
5479         Likewise.
5480         * testsuite/20_util/is_nothrow_swappable/value.cc: Likewise.
5481         * testsuite/20_util/is_nothrow_swappable_with/requirements/explicit_instantiation.cc:
5482         Likewise.
5483         * testsuite/20_util/is_nothrow_swappable_with/requirements/typedefs.cc:
5484         Likewise.
5485         * testsuite/20_util/is_nothrow_swappable_with/value.cc:
5486         Likewise.
5487         * testsuite/20_util/is_swappable/requirements/explicit_instantiation.cc:
5488         Likewise.
5489         * testsuite/20_util/is_swappable/requirements/typedefs.cc:
5490         Likewise.
5491         * testsuite/20_util/is_swappable/value.cc: Likewise.
5492         * testsuite/20_util/is_swappable_with/requirements/explicit_instantiation.cc:
5493         Likewise.
5494         * testsuite/20_util/is_swappable_with/requirements/typedefs.cc:
5495         Likewise.
5496         * testsuite/20_util/is_swappable_with/value.cc: Likewise.
5497         * testsuite/20_util/logical_traits/83134.cc: Likewise.
5498         * testsuite/20_util/logical_traits/requirements/explicit_instantiation.cc:
5499         Likewise.
5500         * testsuite/20_util/logical_traits/requirements/typedefs.cc:
5501         Likewise.
5502         * testsuite/20_util/logical_traits/value.cc: Likewise.
5503         * testsuite/20_util/pair/cons/deduction.cc: Likewise.
5504         * testsuite/20_util/pair/swap_cxx17.cc: Likewise.
5505         * testsuite/20_util/ratio/requirements/ratio_equal_v.cc:
5506         Likewise.
5507         * testsuite/20_util/reference_wrapper/83427.cc: Likewise.
5508         * testsuite/20_util/reference_wrapper/deduction.cc: Likewise.
5509         * testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
5510         * testsuite/20_util/shared_ptr/cons/deduction.cc: Likewise.
5511         * testsuite/20_util/shared_ptr/requirements/weak_type.cc:
5512         Likewise.
5513         * testsuite/20_util/time_point/arithmetic/constexpr.cc:
5514         Likewise.
5515         * testsuite/20_util/time_point_cast/rounding.cc: Likewise.
5516         * testsuite/20_util/to_chars/3.cc: Likewise.
5517         * testsuite/20_util/to_chars/chars_format.cc: Likewise.
5518         * testsuite/20_util/to_chars/lwg3266.cc: Likewise.
5519         * testsuite/20_util/to_chars/requirements.cc: Likewise.
5520         * testsuite/20_util/tuple/78939.cc: Likewise.
5521         * testsuite/20_util/tuple/apply/1.cc: Likewise.
5522         * testsuite/20_util/tuple/apply/2.cc: Likewise.
5523         * testsuite/20_util/tuple/cons/deduction.cc: Likewise.
5524         * testsuite/20_util/tuple/make_from_tuple/1.cc: Likewise.
5525         * testsuite/20_util/tuple/make_from_tuple/2.cc: Likewise.
5526         * testsuite/20_util/tuple/swap_cxx17.cc: Likewise.
5527         * testsuite/20_util/tuple/tuple_size_v.cc: Likewise.
5528         * testsuite/20_util/unique_ptr/cons/deduction_neg.cc: Likewise.
5529         * testsuite/20_util/uses_allocator/requirements/uses_allocator_v.cc:
5530         Likewise.
5531         * testsuite/20_util/variable_templates_for_traits.cc: Likewise.
5532         * testsuite/20_util/void_t/1.cc: Likewise.
5533         * testsuite/20_util/weak_ptr/cons/deduction.cc: Likewise.
5534         * testsuite/24_iterators/container_access.cc: Likewise.
5535         * testsuite/24_iterators/headers/iterator/range_access_c++17.cc:
5536         Likewise.
5537         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc:
5538         Likewise.
5539         * testsuite/24_iterators/range_access/range_access_cpp17.cc:
5540         Likewise.
5541         * testsuite/24_iterators/range_access/range_access_cpp17_neg.cc:
5542         Likewise.
5543         * testsuite/26_numerics/gcd/gcd_neg.cc: Likewise.
5544         * testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
5545         Likewise.
5546         * testsuite/26_numerics/headers/cmath/hypot.cc: Likewise.
5547         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
5548         Likewise.
5549         * testsuite/26_numerics/lcm/1.cc: Likewise.
5550         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
5551         * testsuite/26_numerics/valarray/deduction.cc: Likewise.
5552         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc:
5553         Likewise.
5554         * testsuite/27_io/manipulators/standard/char/quoted_sv.cc:
5555         Likewise.
5556         * testsuite/27_io/manipulators/standard/wchar_t/quoted_sv.cc:
5557         Likewise.
5558         * testsuite/27_io/types/4.cc: Likewise.
5559         * testsuite/28_regex/basic_regex/ctors/deduction.cc: Likewise.
5560         * testsuite/libstdc++-prettyprinters/91997.cc: Likewise.
5561         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
5562
5563 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5564
5565         * testsuite/20_util/function_objects/searchers.cc: Remove
5566         -std=gnu++17 from dg-options directive.
5567         * testsuite/20_util/specialized_algorithms/memory_management_tools/1.cc:
5568         Likewise.
5569         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
5570         Likewise.
5571         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94540.cc:
5572         Likewise.
5573         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94831.cc:
5574         Likewise.
5575         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/94540.cc:
5576         Likewise.
5577         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
5578         Likewise.
5579         * testsuite/20_util/unique_ptr/specialized_algorithms/swap_cxx17.cc:
5580         Likewise.
5581         * testsuite/25_algorithms/clamp/1.cc: Likewise.
5582         * testsuite/25_algorithms/clamp/2.cc: Likewise.
5583         * testsuite/25_algorithms/clamp/constexpr.cc: Likewise.
5584         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/1.cc:
5585         Likewise.
5586         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/pod.cc:
5587         Likewise.
5588         * testsuite/25_algorithms/for_each/for_each_n.cc: Likewise.
5589         * testsuite/25_algorithms/for_each/for_each_n_debug.cc:
5590         Likewise.
5591         * testsuite/25_algorithms/sample/1.cc: Likewise.
5592         * testsuite/25_algorithms/sample/2.cc: Likewise.
5593         * testsuite/25_algorithms/sample/3.cc: Likewise.
5594         * testsuite/25_algorithms/sample/81221.cc: Likewise.
5595         * testsuite/25_algorithms/search/searcher.cc: Likewise.
5596         * testsuite/26_numerics/exclusive_scan/1.cc: Likewise.
5597         * testsuite/26_numerics/inclusive_scan/1.cc: Likewise.
5598         * testsuite/26_numerics/reduce/1.cc: Likewise.
5599         * testsuite/26_numerics/reduce/2.cc: Likewise.
5600         * testsuite/26_numerics/transform_exclusive_scan/1.cc: Likewise.
5601         * testsuite/26_numerics/transform_inclusive_scan/1.cc: Likewise.
5602         * testsuite/26_numerics/transform_reduce/1.cc: Likewise.
5603
5604 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5605
5606         * testsuite/23_containers/array/cons/deduction.cc: Remove
5607         -std=gnu++17 from dg-options directive.
5608         * testsuite/23_containers/array/cons/deduction_neg.cc: Likewise.
5609         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
5610         Likewise.
5611         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
5612         Likewise.
5613         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
5614         Likewise.
5615         * testsuite/23_containers/deque/cons/deduction.cc: Likewise.
5616         * testsuite/23_containers/deque/modifiers/emplace/cxx17_return.cc:
5617         Likewise.
5618         * testsuite/23_containers/forward_list/cons/deduction.cc:
5619         Likewise.
5620         * testsuite/23_containers/forward_list/modifiers/emplace_cxx17_return.cc:
5621         Likewise.
5622         * testsuite/23_containers/list/cons/deduction.cc: Likewise.
5623         * testsuite/23_containers/list/modifiers/emplace/cxx17_return.cc:
5624         Likewise.
5625         * testsuite/23_containers/map/cons/deduction.cc: Likewise.
5626         * testsuite/23_containers/map/modifiers/extract.cc: Likewise.
5627         * testsuite/23_containers/map/modifiers/insert/83226.cc:
5628         Likewise.
5629         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
5630         Likewise.
5631         * testsuite/23_containers/map/modifiers/merge.cc: Likewise.
5632         * testsuite/23_containers/map/modifiers/try_emplace/1.cc:
5633         Likewise.
5634         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
5635         * testsuite/23_containers/multimap/modifiers/extract.cc:
5636         Likewise.
5637         * testsuite/23_containers/multimap/modifiers/merge.cc: Likewise.
5638         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
5639         * testsuite/23_containers/multiset/modifiers/extract.cc:
5640         Likewise.
5641         * testsuite/23_containers/multiset/modifiers/merge.cc: Likewise.
5642         * testsuite/23_containers/priority_queue/deduction.cc: Likewise.
5643         * testsuite/23_containers/queue/deduction.cc: Likewise.
5644         * testsuite/23_containers/queue/members/emplace_cxx17_return.cc:
5645         Likewise.
5646         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
5647         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
5648         * testsuite/23_containers/set/modifiers/merge.cc: Likewise.
5649         * testsuite/23_containers/set/modifiers/node_swap.cc: Likewise.
5650         * testsuite/23_containers/stack/deduction.cc: Likewise.
5651         * testsuite/23_containers/stack/members/emplace_cxx17_return.cc:
5652         Likewise.
5653         * testsuite/23_containers/unordered_map/cons/deduction.cc:
5654         Likewise.
5655         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
5656         Likewise.
5657         * testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc:
5658         Likewise.
5659         * testsuite/23_containers/unordered_map/modifiers/merge.cc:
5660         Likewise.
5661         * testsuite/23_containers/unordered_map/modifiers/try_emplace.cc:
5662         Likewise.
5663         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
5664         Likewise.
5665         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
5666         Likewise.
5667         * testsuite/23_containers/unordered_multimap/modifiers/merge.cc:
5668         Likewise.
5669         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
5670         Likewise.
5671         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
5672         Likewise.
5673         * testsuite/23_containers/unordered_multiset/modifiers/merge.cc:
5674         Likewise.
5675         * testsuite/23_containers/unordered_set/cons/deduction.cc:
5676         Likewise.
5677         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
5678         Likewise.
5679         * testsuite/23_containers/unordered_set/modifiers/merge.cc:
5680         Likewise.
5681         * testsuite/23_containers/vector/bool/emplace_cxx17_return.cc:
5682         Likewise.
5683         * testsuite/23_containers/vector/cons/89164_c++17.cc: Likewise.
5684         * testsuite/23_containers/vector/cons/deduction.cc: Likewise.
5685         * testsuite/23_containers/vector/modifiers/emplace/cxx17_return.cc:
5686         Likewise.
5687
5688 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5689
5690         * testsuite/21_strings/basic_string/79162.cc: Remove
5691         -std=gnu++17 from dg-options directive.
5692         * testsuite/21_strings/basic_string/cons/char/7.cc: Likewise.
5693         * testsuite/21_strings/basic_string/cons/char/79162.cc:
5694         Likewise.
5695         * testsuite/21_strings/basic_string/cons/char/86138.cc:
5696         Likewise.
5697         * testsuite/21_strings/basic_string/cons/char/9.cc: Likewise.
5698         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
5699         Likewise.
5700         * testsuite/21_strings/basic_string/cons/char/moveable2_c++17.cc:
5701         Likewise.
5702         * testsuite/21_strings/basic_string/cons/wchar_t/7.cc: Likewise.
5703         * testsuite/21_strings/basic_string/cons/wchar_t/79162.cc:
5704         Likewise.
5705         * testsuite/21_strings/basic_string/cons/wchar_t/86138.cc:
5706         Likewise.
5707         * testsuite/21_strings/basic_string/cons/wchar_t/9.cc: Likewise.
5708         * testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
5709         Likewise.
5710         * testsuite/21_strings/basic_string/cons/wchar_t/moveable2_c++17.cc:
5711         Likewise.
5712         * testsuite/21_strings/basic_string/hash/hash.cc: Likewise.
5713         * testsuite/21_strings/basic_string/lwg2758.cc: Likewise.
5714         * testsuite/21_strings/basic_string/lwg2946.cc: Likewise.
5715         * testsuite/21_strings/basic_string/modifiers/append/char/4.cc:
5716         Likewise.
5717         * testsuite/21_strings/basic_string/modifiers/append/wchar_t/4.cc:
5718         Likewise.
5719         * testsuite/21_strings/basic_string/modifiers/assign/char/4.cc:
5720         Likewise.
5721         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/4.cc:
5722         Likewise.
5723         * testsuite/21_strings/basic_string/modifiers/insert/char/3.cc:
5724         Likewise.
5725         * testsuite/21_strings/basic_string/modifiers/insert/wchar_t/3.cc:
5726         Likewise.
5727         * testsuite/21_strings/basic_string/modifiers/replace/char/7.cc:
5728         Likewise.
5729         * testsuite/21_strings/basic_string/modifiers/replace/wchar_t/7.cc:
5730         Likewise.
5731         * testsuite/21_strings/basic_string/operations/compare/char/2.cc:
5732         Likewise.
5733         * testsuite/21_strings/basic_string/operations/compare/wchar_t/2.cc:
5734         Likewise.
5735         * testsuite/21_strings/basic_string/operations/data/char/2.cc:
5736         Likewise.
5737         * testsuite/21_strings/basic_string/operations/data/char/86169.cc:
5738         Likewise.
5739         * testsuite/21_strings/basic_string/operations/data/wchar_t/2.cc:
5740         Likewise.
5741         * testsuite/21_strings/basic_string/operations/find/char/5.cc:
5742         Likewise.
5743         * testsuite/21_strings/basic_string/operations/find/wchar_t/5.cc:
5744         Likewise.
5745         * testsuite/21_strings/basic_string/operators/char/5.cc:
5746         Likewise.
5747         * testsuite/21_strings/basic_string/operators/wchar_t/5.cc:
5748         Likewise.
5749         * testsuite/21_strings/basic_string_view/capacity/1.cc:
5750         Likewise.
5751         * testsuite/21_strings/basic_string_view/capacity/empty_neg.cc:
5752         Likewise.
5753         * testsuite/21_strings/basic_string_view/cons/char/1.cc:
5754         Likewise.
5755         * testsuite/21_strings/basic_string_view/cons/char/2.cc:
5756         Likewise.
5757         * testsuite/21_strings/basic_string_view/cons/char/3.cc:
5758         Likewise.
5759         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
5760         Likewise.
5761         * testsuite/21_strings/basic_string_view/cons/wchar_t/1.cc:
5762         Likewise.
5763         * testsuite/21_strings/basic_string_view/cons/wchar_t/2.cc:
5764         Likewise.
5765         * testsuite/21_strings/basic_string_view/cons/wchar_t/3.cc:
5766         Likewise.
5767         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
5768         Likewise.
5769         * testsuite/21_strings/basic_string_view/element_access/char/1.cc:
5770         Likewise.
5771         * testsuite/21_strings/basic_string_view/element_access/char/2.cc:
5772         Likewise.
5773         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
5774         Likewise.
5775         * testsuite/21_strings/basic_string_view/element_access/char/constexpr.cc:
5776         Likewise.
5777         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
5778         Likewise.
5779         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
5780         Likewise.
5781         * testsuite/21_strings/basic_string_view/element_access/char/front_back.cc:
5782         Likewise.
5783         * testsuite/21_strings/basic_string_view/element_access/char/front_back_constexpr.cc:
5784         Likewise.
5785         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
5786         Likewise.
5787         * testsuite/21_strings/basic_string_view/element_access/wchar_t/1.cc:
5788         Likewise.
5789         * testsuite/21_strings/basic_string_view/element_access/wchar_t/2.cc:
5790         Likewise.
5791         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
5792         Likewise.
5793         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr.cc:
5794         Likewise.
5795         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
5796         Likewise.
5797         * testsuite/21_strings/basic_string_view/element_access/wchar_t/empty.cc:
5798         Likewise.
5799         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_back.cc:
5800         Likewise.
5801         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
5802         Likewise.
5803         * testsuite/21_strings/basic_string_view/include.cc: Likewise.
5804         * testsuite/21_strings/basic_string_view/inserters/94051.cc:
5805         Likewise.
5806         * testsuite/21_strings/basic_string_view/inserters/char/1.cc:
5807         Likewise.
5808         * testsuite/21_strings/basic_string_view/inserters/char/2.cc:
5809         Likewise.
5810         * testsuite/21_strings/basic_string_view/inserters/char/3.cc:
5811         Likewise.
5812         * testsuite/21_strings/basic_string_view/inserters/pod/10081-out.cc:
5813         Likewise.
5814         * testsuite/21_strings/basic_string_view/inserters/wchar_t/1.cc:
5815         Likewise.
5816         * testsuite/21_strings/basic_string_view/inserters/wchar_t/2.cc:
5817         Likewise.
5818         * testsuite/21_strings/basic_string_view/inserters/wchar_t/3.cc:
5819         Likewise.
5820         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
5821         Likewise.
5822         * testsuite/21_strings/basic_string_view/literals/types.cc:
5823         Likewise.
5824         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
5825         Likewise.
5826         * testsuite/21_strings/basic_string_view/literals/values.cc:
5827         Likewise.
5828         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/char/1.cc:
5829         Likewise.
5830         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/wchar_t/1.cc:
5831         Likewise.
5832         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/char/1.cc:
5833         Likewise.
5834         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/wchar_t/1.cc:
5835         Likewise.
5836         * testsuite/21_strings/basic_string_view/modifiers/swap/char/1.cc:
5837         Likewise.
5838         * testsuite/21_strings/basic_string_view/modifiers/swap/wchar_t/1.cc:
5839         Likewise.
5840         * testsuite/21_strings/basic_string_view/operations/compare/char/1.cc:
5841         Likewise.
5842         * testsuite/21_strings/basic_string_view/operations/compare/char/13650.cc:
5843         Likewise.
5844         * testsuite/21_strings/basic_string_view/operations/compare/char/2.cc:
5845         Likewise.
5846         * testsuite/21_strings/basic_string_view/operations/compare/char/70483.cc:
5847         Likewise.
5848         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc:
5849         Likewise.
5850         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/1.cc:
5851         Likewise.
5852         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/13650.cc:
5853         Likewise.
5854         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/2.cc:
5855         Likewise.
5856         * testsuite/21_strings/basic_string_view/operations/copy/char/1.cc:
5857         Likewise.
5858         * testsuite/21_strings/basic_string_view/operations/copy/char/2.cc:
5859         Likewise.
5860         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc:
5861         Likewise.
5862         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/2.cc:
5863         Likewise.
5864         * testsuite/21_strings/basic_string_view/operations/data/char/1.cc:
5865         Likewise.
5866         * testsuite/21_strings/basic_string_view/operations/data/wchar_t/1.cc:
5867         Likewise.
5868         * testsuite/21_strings/basic_string_view/operations/find/char/1.cc:
5869         Likewise.
5870         * testsuite/21_strings/basic_string_view/operations/find/char/2.cc:
5871         Likewise.
5872         * testsuite/21_strings/basic_string_view/operations/find/char/3.cc:
5873         Likewise.
5874         * testsuite/21_strings/basic_string_view/operations/find/char/4.cc:
5875         Likewise.
5876         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc:
5877         Likewise.
5878         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/1.cc:
5879         Likewise.
5880         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/2.cc:
5881         Likewise.
5882         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/3.cc:
5883         Likewise.
5884         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/4.cc:
5885         Likewise.
5886         * testsuite/21_strings/basic_string_view/operations/rfind/char/1.cc:
5887         Likewise.
5888         * testsuite/21_strings/basic_string_view/operations/rfind/char/2.cc:
5889         Likewise.
5890         * testsuite/21_strings/basic_string_view/operations/rfind/char/3.cc:
5891         Likewise.
5892         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc:
5893         Likewise.
5894         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/1.cc:
5895         Likewise.
5896         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/2.cc:
5897         Likewise.
5898         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/3.cc:
5899         Likewise.
5900         * testsuite/21_strings/basic_string_view/operations/string_conversion/1.cc:
5901         Likewise.
5902         * testsuite/21_strings/basic_string_view/operations/substr/char/1.cc:
5903         Likewise.
5904         * testsuite/21_strings/basic_string_view/operations/substr/char/83511.cc:
5905         Likewise.
5906         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/1.cc:
5907         Likewise.
5908         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/83511.cc:
5909         Likewise.
5910         * testsuite/21_strings/basic_string_view/operators/char/2.cc:
5911         Likewise.
5912         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
5913         Likewise.
5914         * testsuite/21_strings/basic_string_view/operators/wchar_t/2.cc:
5915         Likewise.
5916         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
5917         Likewise.
5918         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
5919         Likewise.
5920         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
5921         Likewise.
5922         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/1.cc:
5923         Likewise.
5924         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char/1.cc:
5925         Likewise.
5926         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char16_t/1.cc:
5927         Likewise.
5928         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char32_t/1.cc:
5929         Likewise.
5930         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char8_t/1.cc:
5931         Likewise.
5932         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/wchar_t/1.cc:
5933         Likewise.
5934         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
5935         Likewise.
5936         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
5937         Likewise.
5938         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
5939         * testsuite/21_strings/basic_string_view/types/1.cc: Likewise.
5940         * testsuite/21_strings/char_traits/requirements/char/99181.cc:
5941         Likewise.
5942         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
5943
5944 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5945
5946         * testsuite/20_util/memory_resource/1.cc: Remove -std=gnu++17
5947         from dg-options directive.
5948         * testsuite/20_util/memory_resource/2.cc: Likewise.
5949         * testsuite/20_util/monotonic_buffer_resource/1.cc: Likewise.
5950         * testsuite/20_util/monotonic_buffer_resource/93208.cc:
5951         Likewise.
5952         * testsuite/20_util/monotonic_buffer_resource/allocate.cc:
5953         Likewise.
5954         * testsuite/20_util/monotonic_buffer_resource/deallocate.cc:
5955         Likewise.
5956         * testsuite/20_util/monotonic_buffer_resource/release.cc:
5957         Likewise.
5958         * testsuite/20_util/monotonic_buffer_resource/upstream_resource.cc:
5959         Likewise.
5960         * testsuite/20_util/polymorphic_allocator/1.cc: Likewise.
5961         * testsuite/20_util/polymorphic_allocator/construct_pair.cc:
5962         Likewise.
5963         * testsuite/20_util/polymorphic_allocator/resource.cc: Likewise.
5964         * testsuite/20_util/polymorphic_allocator/select.cc: Likewise.
5965         * testsuite/20_util/synchronized_pool_resource/allocate.cc:
5966         Likewise.
5967         * testsuite/20_util/synchronized_pool_resource/allocate_single.cc:
5968         Likewise.
5969         * testsuite/20_util/synchronized_pool_resource/cons.cc:
5970         Likewise.
5971         * testsuite/20_util/synchronized_pool_resource/cons_single.cc:
5972         Likewise.
5973         * testsuite/20_util/synchronized_pool_resource/is_equal.cc:
5974         Likewise.
5975         * testsuite/20_util/synchronized_pool_resource/multithreaded.cc:
5976         Likewise.
5977         * testsuite/20_util/synchronized_pool_resource/options.cc:
5978         Likewise.
5979         * testsuite/20_util/synchronized_pool_resource/release.cc:
5980         Likewise.
5981         * testsuite/20_util/synchronized_pool_resource/release_single.cc:
5982         Likewise.
5983         * testsuite/20_util/unsynchronized_pool_resource/allocate-max-chunks.cc:
5984         Likewise.
5985         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
5986         Likewise.
5987         * testsuite/20_util/unsynchronized_pool_resource/cons.cc:
5988         Likewise.
5989         * testsuite/20_util/unsynchronized_pool_resource/is_equal.cc:
5990         Likewise.
5991         * testsuite/20_util/unsynchronized_pool_resource/options.cc:
5992         Likewise.
5993         * testsuite/20_util/unsynchronized_pool_resource/release.cc:
5994         Likewise.
5995         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc:
5996         Likewise.
5997         * testsuite/23_containers/deque/types/pmr_typedefs.cc: Likewise.
5998         * testsuite/23_containers/deque/types/pmr_typedefs_debug.cc:
5999         Likewise.
6000         * testsuite/23_containers/forward_list/pmr_typedefs.cc:
6001         Likewise.
6002         * testsuite/23_containers/forward_list/pmr_typedefs_debug.cc:
6003         Likewise.
6004         * testsuite/23_containers/list/pmr_typedefs.cc: Likewise.
6005         * testsuite/23_containers/list/pmr_typedefs_debug.cc: Likewise.
6006         * testsuite/23_containers/map/pmr_typedefs.cc: Likewise.
6007         * testsuite/23_containers/map/pmr_typedefs_debug.cc: Likewise.
6008         * testsuite/23_containers/multimap/pmr_typedefs.cc: Likewise.
6009         * testsuite/23_containers/multimap/pmr_typedefs_debug.cc:
6010         Likewise.
6011         * testsuite/23_containers/multiset/pmr_typedefs.cc: Likewise.
6012         * testsuite/23_containers/multiset/pmr_typedefs_debug.cc:
6013         Likewise.
6014         * testsuite/23_containers/set/pmr_typedefs.cc: Likewise.
6015         * testsuite/23_containers/set/pmr_typedefs_debug.cc: Likewise.
6016         * testsuite/23_containers/unordered_map/pmr_typedefs.cc:
6017         Likewise.
6018         * testsuite/23_containers/unordered_map/pmr_typedefs_debug.cc:
6019         Likewise.
6020         * testsuite/23_containers/unordered_multimap/pmr_typedefs.cc:
6021         Likewise.
6022         * testsuite/23_containers/unordered_multimap/pmr_typedefs_debug.cc:
6023         Likewise.
6024         * testsuite/23_containers/unordered_multiset/pmr_typedefs.cc:
6025         Likewise.
6026         * testsuite/23_containers/unordered_multiset/pmr_typedefs_debug.cc:
6027         Likewise.
6028         * testsuite/23_containers/unordered_set/pmr_typedefs.cc:
6029         Likewise.
6030         * testsuite/23_containers/unordered_set/pmr_typedefs_debug.cc:
6031         Likewise.
6032         * testsuite/23_containers/vector/pmr_typedefs.cc: Likewise.
6033         * testsuite/23_containers/vector/types/pmr_typedefs_debug.cc:
6034         Likewise.
6035         * testsuite/28_regex/match_results/pmr_typedefs.cc: Likewise.
6036
6037 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
6038
6039         * testsuite/29_atomics/atomic/69769.cc: Remove -std=gnu++17 from
6040         dg-options.
6041         * testsuite/29_atomics/atomic/is_always_lock_free.cc:
6042         * testsuite/29_atomics/atomic/requirements/typedefs.cc:
6043         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
6044         * testsuite/29_atomics/atomic_integral/requirements/typedefs.cc:
6045         * testsuite/30_threads/lock_guard/cons/deduction.cc: Likewise.
6046         * testsuite/30_threads/scoped_lock/cons/1.cc: Likewise.
6047         * testsuite/30_threads/scoped_lock/cons/deduction.cc: Likewise.
6048         * testsuite/30_threads/scoped_lock/requirements/explicit_instantiation.cc:
6049         Likewise.
6050         * testsuite/30_threads/scoped_lock/requirements/typedefs.cc:
6051         Likewise.
6052         * testsuite/30_threads/shared_lock/70766.cc: Likewise.
6053         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
6054         * testsuite/30_threads/shared_mutex/cons/assign_neg.cc:
6055         Likewise.
6056         * testsuite/30_threads/shared_mutex/cons/copy_neg.cc: Likewise.
6057         * testsuite/30_threads/shared_mutex/requirements/standard_layout.cc:
6058         Likewise.
6059         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
6060         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
6061         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
6062         * testsuite/30_threads/unique_lock/cons/deduction.cc: Likewise.
6063
6064 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
6065
6066         * testsuite/20_util/any/assign/1.cc: Remove -std=gnu++17 from
6067         dg-options directive.
6068         * testsuite/20_util/any/assign/2.cc: Likewise.
6069         * testsuite/20_util/any/assign/emplace.cc: Likewise.
6070         * testsuite/20_util/any/assign/exception.cc: Likewise.
6071         * testsuite/20_util/any/assign/self.cc: Likewise.
6072         * testsuite/20_util/any/cons/1.cc: Likewise.
6073         * testsuite/20_util/any/cons/2.cc: Likewise.
6074         * testsuite/20_util/any/cons/90415.cc: Likewise.
6075         * testsuite/20_util/any/cons/92156.cc: Likewise.
6076         * testsuite/20_util/any/cons/aligned.cc: Likewise.
6077         * testsuite/20_util/any/cons/explicit.cc: Likewise.
6078         * testsuite/20_util/any/cons/in_place.cc: Likewise.
6079         * testsuite/20_util/any/cons/nontrivial.cc: Likewise.
6080         * testsuite/20_util/any/make_any.cc: Likewise.
6081         * testsuite/20_util/any/misc/any_cast.cc: Likewise.
6082         * testsuite/20_util/any/misc/any_cast_neg.cc: Likewise.
6083         * testsuite/20_util/any/misc/any_cast_no_rtti.cc: Likewise.
6084         * testsuite/20_util/any/misc/swap.cc: Likewise.
6085         * testsuite/20_util/any/modifiers/1.cc: Likewise.
6086         * testsuite/20_util/any/modifiers/83658.cc: Likewise.
6087         * testsuite/20_util/any/modifiers/92156.cc: Likewise.
6088         * testsuite/20_util/any/observers/type.cc: Likewise.
6089         * testsuite/20_util/any/requirements.cc: Likewise.
6090         * testsuite/20_util/any/typedefs.cc: Likewise.
6091         * testsuite/20_util/optional/77288.cc: Likewise.
6092         * testsuite/20_util/optional/84601.cc: Likewise.
6093         * testsuite/20_util/optional/assignment/1.cc: Likewise.
6094         * testsuite/20_util/optional/assignment/2.cc: Likewise.
6095         * testsuite/20_util/optional/assignment/3.cc: Likewise.
6096         * testsuite/20_util/optional/assignment/4.cc: Likewise.
6097         * testsuite/20_util/optional/assignment/5.cc: Likewise.
6098         * testsuite/20_util/optional/assignment/6.cc: Likewise.
6099         * testsuite/20_util/optional/assignment/7.cc: Likewise.
6100         * testsuite/20_util/optional/assignment/8.cc: Likewise.
6101         * testsuite/20_util/optional/assignment/9.cc: Likewise.
6102         * testsuite/20_util/optional/bad_access.cc: Likewise.
6103         * testsuite/20_util/optional/cons/77727.cc: Likewise.
6104         * testsuite/20_util/optional/cons/85642.cc: Likewise.
6105         * testsuite/20_util/optional/cons/copy.cc: Likewise.
6106         * testsuite/20_util/optional/cons/deduction.cc: Likewise.
6107         * testsuite/20_util/optional/cons/default.cc: Likewise.
6108         * testsuite/20_util/optional/cons/move.cc: Likewise.
6109         * testsuite/20_util/optional/cons/trivial.cc: Likewise.
6110         * testsuite/20_util/optional/cons/value.cc: Likewise.
6111         * testsuite/20_util/optional/cons/value_neg.cc: Likewise.
6112         * testsuite/20_util/optional/constexpr/cons/default.cc:
6113         Likewise.
6114         * testsuite/20_util/optional/constexpr/cons/value.cc: Likewise.
6115         * testsuite/20_util/optional/constexpr/in_place.cc: Likewise.
6116         * testsuite/20_util/optional/constexpr/make_optional.cc:
6117         Likewise.
6118         * testsuite/20_util/optional/constexpr/nullopt.cc: Likewise.
6119         * testsuite/20_util/optional/constexpr/observers/1.cc: Likewise.
6120         * testsuite/20_util/optional/constexpr/observers/2.cc: Likewise.
6121         * testsuite/20_util/optional/constexpr/observers/3.cc: Likewise.
6122         * testsuite/20_util/optional/constexpr/observers/4.cc: Likewise.
6123         * testsuite/20_util/optional/constexpr/observers/5.cc: Likewise.
6124         * testsuite/20_util/optional/constexpr/relops/1.cc: Likewise.
6125         * testsuite/20_util/optional/constexpr/relops/2.cc: Likewise.
6126         * testsuite/20_util/optional/constexpr/relops/3.cc: Likewise.
6127         * testsuite/20_util/optional/constexpr/relops/4.cc: Likewise.
6128         * testsuite/20_util/optional/constexpr/relops/5.cc: Likewise.
6129         * testsuite/20_util/optional/constexpr/relops/6.cc: Likewise.
6130         * testsuite/20_util/optional/hash.cc: Likewise.
6131         * testsuite/20_util/optional/in_place.cc: Likewise.
6132         * testsuite/20_util/optional/make_optional.cc: Likewise.
6133         * testsuite/20_util/optional/nullopt.cc: Likewise.
6134         * testsuite/20_util/optional/observers/1.cc: Likewise.
6135         * testsuite/20_util/optional/observers/2.cc: Likewise.
6136         * testsuite/20_util/optional/observers/3.cc: Likewise.
6137         * testsuite/20_util/optional/observers/4.cc: Likewise.
6138         * testsuite/20_util/optional/observers/5.cc: Likewise.
6139         * testsuite/20_util/optional/observers/6.cc: Likewise.
6140         * testsuite/20_util/optional/relops/1.cc: Likewise.
6141         * testsuite/20_util/optional/relops/2.cc: Likewise.
6142         * testsuite/20_util/optional/relops/3.cc: Likewise.
6143         * testsuite/20_util/optional/relops/4.cc: Likewise.
6144         * testsuite/20_util/optional/relops/5.cc: Likewise.
6145         * testsuite/20_util/optional/relops/6.cc: Likewise.
6146         * testsuite/20_util/optional/relops/7.cc: Likewise.
6147         * testsuite/20_util/optional/requirements.cc: Likewise.
6148         * testsuite/20_util/optional/swap/1.cc: Likewise.
6149         * testsuite/20_util/optional/swap/2.cc: Likewise.
6150         * testsuite/20_util/optional/typedefs.cc: Likewise.
6151         * testsuite/20_util/variant/80165.cc: Likewise.
6152         * testsuite/20_util/variant/85183.cc: Likewise.
6153         * testsuite/20_util/variant/86874.cc: Likewise.
6154         * testsuite/20_util/variant/87431.cc: Likewise.
6155         * testsuite/20_util/variant/87619.cc: Likewise.
6156         * testsuite/20_util/variant/91807.cc: Likewise.
6157         * testsuite/20_util/variant/any.cc: Likewise.
6158         * testsuite/20_util/variant/compile.cc: Likewise.
6159         * testsuite/20_util/variant/deduction.cc: Likewise.
6160         * testsuite/20_util/variant/exception_safety.cc: Likewise.
6161         * testsuite/20_util/variant/hash.cc: Likewise.
6162         * testsuite/20_util/variant/index_type.cc: Likewise.
6163         * testsuite/20_util/variant/relops/89851.cc: Likewise.
6164         * testsuite/20_util/variant/relops/90008.cc: Likewise.
6165         * testsuite/20_util/variant/run.cc: Likewise.
6166         * testsuite/20_util/variant/visit.cc: Likewise.
6167
6168 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
6169
6170         * testsuite/27_io/basic_filebuf/open/char/path.cc: Remove
6171         -std=gnu++17 from dg-options directive.
6172         * testsuite/27_io/basic_fstream/cons/char/path.cc: Likewise.
6173         * testsuite/27_io/basic_fstream/open/char/path.cc: Likewise.
6174         * testsuite/27_io/basic_ifstream/cons/char/path.cc: Likewise.
6175         * testsuite/27_io/basic_ifstream/open/char/path.cc: Likewise.
6176         * testsuite/27_io/basic_ofstream/cons/char/path.cc: Likewise.
6177         * testsuite/27_io/basic_ofstream/open/char/path.cc: Likewise.
6178         * testsuite/27_io/filesystem/directory_entry/86597.cc: Likewise.
6179         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc:
6180         Likewise.
6181         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
6182         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
6183         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
6184         * testsuite/27_io/filesystem/iterators/91067.cc: Likewise.
6185         * testsuite/27_io/filesystem/iterators/caching.cc: Likewise.
6186         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
6187         Likewise.
6188         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
6189         * testsuite/27_io/filesystem/iterators/recursion_pending.cc:
6190         Likewise.
6191         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
6192         Likewise.
6193         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
6194         * testsuite/27_io/filesystem/operations/all.cc: Likewise.
6195         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
6196         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
6197         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
6198         * testsuite/27_io/filesystem/operations/create_directories.cc:
6199         Likewise.
6200         * testsuite/27_io/filesystem/operations/create_directory.cc:
6201         Likewise.
6202         * testsuite/27_io/filesystem/operations/create_symlink.cc:
6203         Likewise.
6204         * testsuite/27_io/filesystem/operations/current_path.cc:
6205         Likewise.
6206         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
6207         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
6208         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
6209         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
6210         * testsuite/27_io/filesystem/operations/last_write_time.cc:
6211         Likewise.
6212         * testsuite/27_io/filesystem/operations/permissions.cc:
6213         Likewise.
6214         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
6215         * testsuite/27_io/filesystem/operations/read_symlink.cc:
6216         Likewise.
6217         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
6218         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
6219         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
6220         * testsuite/27_io/filesystem/operations/rename.cc: Likewise.
6221         * testsuite/27_io/filesystem/operations/resize_file.cc:
6222         Likewise.
6223         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
6224         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
6225         * testsuite/27_io/filesystem/operations/symlink_status.cc:
6226         Likewise.
6227         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
6228         Likewise.
6229         * testsuite/27_io/filesystem/operations/weakly_canonical.cc:
6230         Likewise.
6231         * testsuite/27_io/filesystem/path/append/path.cc: Likewise.
6232         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
6233         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
6234         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
6235         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
6236         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
6237         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
6238         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
6239         * testsuite/27_io/filesystem/path/concat/92853.cc: Likewise.
6240         * testsuite/27_io/filesystem/path/concat/94063.cc: Likewise.
6241         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
6242         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
6243         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
6244         * testsuite/27_io/filesystem/path/construct/90281.cc: Likewise.
6245         * testsuite/27_io/filesystem/path/construct/90634.cc: Likewise.
6246         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
6247         * testsuite/27_io/filesystem/path/construct/default.cc:
6248         Likewise.
6249         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
6250         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
6251         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
6252         * testsuite/27_io/filesystem/path/construct/string_view.cc:
6253         Likewise.
6254         * testsuite/27_io/filesystem/path/decompose/extension.cc:
6255         Likewise.
6256         * testsuite/27_io/filesystem/path/decompose/filename.cc:
6257         Likewise.
6258         * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
6259         Likewise.
6260         * testsuite/27_io/filesystem/path/decompose/relative_path.cc:
6261         Likewise.
6262         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
6263         Likewise.
6264         * testsuite/27_io/filesystem/path/decompose/root_name.cc:
6265         Likewise.
6266         * testsuite/27_io/filesystem/path/decompose/root_path.cc:
6267         Likewise.
6268         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
6269         * testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc:
6270         Likewise.
6271         * testsuite/27_io/filesystem/path/factory/u8path.cc: Likewise.
6272         * testsuite/27_io/filesystem/path/generation/normal.cc:
6273         Likewise.
6274         * testsuite/27_io/filesystem/path/generation/normal2.cc:
6275         Likewise.
6276         * testsuite/27_io/filesystem/path/generation/proximate.cc:
6277         Likewise.
6278         * testsuite/27_io/filesystem/path/generation/relative.cc:
6279         Likewise.
6280         * testsuite/27_io/filesystem/path/generic/94242.cc: Likewise.
6281         * testsuite/27_io/filesystem/path/generic/generic_string.cc:
6282         Likewise.
6283         * testsuite/27_io/filesystem/path/generic/utf.cc: Likewise.
6284         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: Likewise.
6285         * testsuite/27_io/filesystem/path/io/dr2989.cc: Likewise.
6286         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
6287         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
6288         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
6289         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
6290         Likewise.
6291         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
6292         Likewise.
6293         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
6294         Likewise.
6295         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
6296         Likewise.
6297         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
6298         * testsuite/27_io/filesystem/path/native/alloc.cc: Likewise.
6299         * testsuite/27_io/filesystem/path/native/string-char8_t.cc:
6300         Likewise.
6301         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
6302         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
6303         * testsuite/27_io/filesystem/path/nonmember/cmp.cc: Likewise.
6304         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc:
6305         Likewise.
6306         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
6307         * testsuite/27_io/filesystem/path/query/empty_neg.cc:
6308         * testsuite/27_io/filesystem/path/query/has_extension.cc:
6309         Likewise.
6310         * testsuite/27_io/filesystem/path/query/has_filename.cc:
6311         Likewise.
6312         * testsuite/27_io/filesystem/path/query/has_parent_path.cc:
6313         Likewise.
6314         * testsuite/27_io/filesystem/path/query/has_relative_path.cc:
6315         Likewise.
6316         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
6317         Likewise.
6318         * testsuite/27_io/filesystem/path/query/has_root_name.cc:
6319         Likewise.
6320         * testsuite/27_io/filesystem/path/query/has_root_path.cc:
6321         Likewise.
6322         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
6323         * testsuite/27_io/filesystem/path/query/is_absolute.cc:
6324         Likewise.
6325         * testsuite/27_io/filesystem/path/query/is_relative.cc:
6326         Likewise.
6327         * testsuite/experimental/filesystem/path/construct/string_view.cc:
6328         Likewise.
6329
6330 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
6331
6332         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
6333         Remove -std=gnu++17 from dg-options.
6334         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
6335         Likewise.
6336         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc:
6337         Likewise.
6338         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc:
6339         Likewise.
6340         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
6341         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
6342         Likewise.
6343         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
6344         Likewise.
6345         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc:
6346         Likewise.
6347         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc:
6348         Likewise.
6349         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
6350         Likewise.
6351         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
6352         Likewise.
6353         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
6354         Likewise.
6355         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
6356         Likewise.
6357         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc:
6358         Likewise.
6359         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc:
6360         Likewise.
6361         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
6362         Likewise.
6363         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
6364         Likewise.
6365         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
6366         Likewise.
6367         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc:
6368         Likewise.
6369         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc:
6370         Likewise.
6371         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc:
6372         Likewise.
6373         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
6374         Likewise.
6375         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
6376         Likewise.
6377         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc:
6378         Likewise.
6379         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc:
6380         Likewise.
6381         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc:
6382         Likewise.
6383         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc:
6384         Likewise.
6385         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc:
6386         Likewise.
6387         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc:
6388         Likewise.
6389         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc:
6390         Likewise.
6391         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
6392         Likewise.
6393         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc:
6394         Likewise.
6395         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc:
6396         Likewise.
6397         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc:
6398         Likewise.
6399         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc:
6400         Likewise.
6401         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
6402         Likewise.
6403         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc:
6404         Likewise.
6405         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
6406         Likewise.
6407         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc:
6408         Likewise.
6409         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc:
6410         Likewise.
6411         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: Likewise.
6412         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc:
6413         Likewise.
6414         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
6415         Likewise.
6416         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc:
6417         Likewise.
6418         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc:
6419         Likewise.
6420         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
6421         Likewise.
6422         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: Likewise.
6423         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: Likewise.
6424         * testsuite/25_algorithms/pstl/feature_test-2.cc: Likewise.
6425         * testsuite/25_algorithms/pstl/feature_test-3.cc: Likewise.
6426         * testsuite/25_algorithms/pstl/feature_test-4.cc: Likewise.
6427         * testsuite/25_algorithms/pstl/feature_test-5.cc: Likewise.
6428         * testsuite/25_algorithms/pstl/feature_test.cc: Likewise.
6429         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
6430         Likewise.
6431         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: Likewise.
6432         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: Likewise.
6433         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc:
6434         Likewise.
6435         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc:
6436         Likewise.
6437
6438 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
6439
6440         * testsuite/20_util/scoped_allocator/69293_neg.cc: Add dg-error
6441         for additional errors in C++20.
6442         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
6443         Likewise.
6444         * testsuite/20_util/uses_allocator/69293_neg.cc: Likewise.
6445         * testsuite/27_io/filesystem/path/io/dr2989.cc: Likewise.
6446
6447 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
6448
6449         * testsuite/20_util/variant/compile.cc: Rename 'any' to avoid
6450         clash with std::any.
6451
6452 2021-05-07  Jonathan Wakely  <jwakely@redhat.com>
6453
6454         * include/std/istream (__rvalue_stream_extraction_t): Replace
6455         use of __rval_streamable.
6456         * include/std/ostream (__rvalue_stream_insertion_t): Likewise.
6457         (__rval_streamable): Remove.
6458         (_Require_derived_from_ios_base, __derived_from_ios_base): New
6459         helper for checking constraints.
6460         * testsuite/27_io/basic_istream/extractors_other/char/4.cc: Fix
6461         reference to the wrong subclause of the standard.
6462         * testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
6463         Likewise.
6464         * testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
6465         Likewise.
6466         * testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
6467         Likewise.
6468         * testsuite/27_io/basic_ostream/inserters_other/char/99692.cc:
6469         New test.
6470         * testsuite/27_io/filesystem/path/io/dr2989.cc: Adjust pruned
6471         errors.
6472
6473 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
6474
6475         * include/bits/stl_algobase.h (__copy_move, __copy_move_backward):
6476         Improve static_assert messages.
6477         * testsuite/25_algorithms/copy/58982.cc: Adjust expected output.
6478         * testsuite/25_algorithms/copy_n/58982.cc: Likewise.
6479
6480 2021-05-06  Patrick Palka  <ppalka@redhat.com>
6481
6482         * include/std/ranges (filter_view::_Iterator::base): Make the
6483         const& overload unconstrained and return a const reference as
6484         per LWG 3533.  Make unconditionally noexcept.
6485         (transform_view::_Iterator::base): Likewise.
6486         (elements_view::_Iterator::base): Likewise.
6487
6488 2021-05-06  Patrick Palka  <ppalka@redhat.com>
6489
6490         * include/bits/stl_iterator.h (move_iterator::base): Make the
6491         const& overload unconstrained and return a const reference as
6492         per LWG 3391.  Make unconditionally noexcept.
6493         (counted_iterator::base): Likewise.
6494         * testsuite/24_iterators/move_iterator/lwg3391.cc: New test.
6495         * testsuite/24_iterators/move_iterator/move_only.cc: Adjust
6496         has_member_base concept to decay-copy the result of base().
6497
6498 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
6499
6500         * include/std/type_traits (remove_cvref_t): Define in terms of
6501         remove_cvref.
6502         * testsuite/20_util/remove_cvref/value.cc: Check alias.
6503
6504 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
6505
6506         Revert:
6507         2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
6508
6509         * include/std/charconv (__from_chars_alnum): Pass unsigned
6510         char to std::isdigit.
6511
6512 2021-05-05  Patrick Palka  <ppalka@redhat.com>
6513
6514         * include/bits/ranges_util.h (enable_borrowed_range<subrange>):
6515         Remove constraints on this partial specialization.
6516         * include/std/ranges (enable_borrowed_range<iota_view>):
6517         Likewise.
6518
6519 2021-05-05  Patrick Palka  <ppalka@redhat.com>
6520
6521         * include/std/ranges (transform_view::_Iterator::iter_swap):
6522         Remove as per LWG 3520.
6523         (join_view::_Iterator::iter_swap): Add indirectly_swappable
6524         constraint as per LWG 3517.
6525
6526 2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
6527
6528         * testsuite/20_util/function_objects/invoke/3.cc: Check feature
6529         test macro.
6530         * testsuite/20_util/function_objects/invoke/version.cc: New test.
6531
6532 2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
6533
6534         * include/std/charconv (__from_chars_alnum): Pass unsigned
6535         char to std::isdigit.
6536
6537 2021-05-05  Corentin Gay  <gay@adacore.com>
6538
6539         * acinclude.m4: Add VxWorks-specific case for the
6540         configuration of ctypes.
6541         * configure: Regenerate.
6542         * config/locale/vxworks/ctype_members.cc: Add VxWorks-specific
6543         version.
6544         * config/os/vxworks/ctype_base.h: Adjust for VxWorks7+.
6545         * config/os/vxworks/ctype_configure_char.cc: Likewise.
6546         * config/os/vxworks/ctype_inline.h: Likewise.
6547         * testsuite/28_regex/traits/char/isctype.cc: Defines
6548         NEWLINE_IN_CLASS_BLANK if the target is VxWorks.
6549         * testsuite/28_regex/traits/wchar_t/isctype.cc: Likewise.
6550
6551 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
6552
6553         * include/std/future (promise::set_value): Check for existence
6554         of shared state before dereferncing it.
6555         (promise::set_exception, promise::set_value_at_thread_exit)
6556         (promise::set_exception_at_thread_exit): Likewise.
6557         (promise<R&>::set_value, promise<R&>::set_exception)
6558         (promise<R&>::set_value_at_thread_exit)
6559         (promise<R&>::set_exception_at_thread_exit): Likewise.
6560         (promise<void>::set_value, promise<void>::set_exception)
6561         (promise<void>::set_value_at_thread_exit)
6562         (promise<void>::set_exception_at_thread_exit): Likewise.
6563         * testsuite/30_threads/promise/members/at_thread_exit2.cc:
6564         Remove unused variable.
6565
6566 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
6567
6568         * include/bits/basic_string.h (basic_string(const CharT*, const A&)):
6569         Do not do arithmetic on null pointer.
6570
6571 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
6572
6573         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp
6574         (find_key_pointer(key_const_reference, false_type))
6575         (find_key_pointer(key_const_reference, true_type)): Do not
6576         dereference null pointer.
6577
6578 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
6579
6580         * testsuite/20_util/from_chars/3.cc: Use unsigned type to avoid
6581         overflow.
6582         * testsuite/24_iterators/reverse_iterator/2.cc: Do not add
6583         non-zero value to null pointer.
6584         * testsuite/25_algorithms/copy_backward/move_iterators/69478.cc:
6585         Use past-the-end iterator for result.
6586         * testsuite/25_algorithms/move_backward/69478.cc: Likewise.
6587         * testsuite/25_algorithms/move_backward/93872.cc: Likewise.
6588
6589 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
6590
6591         PR libstdc++/100384
6592         * include/std/variant (__get_t): New alias template yielding the
6593         return type of std::get<N> on a variant.
6594         (__visit_result_t): New alias template yielding the result of
6595         std::visit.
6596         (__same_types): Move into namespace __detail::__variant.
6597         (__check_visitor_results): Likewise. Use __invoke_result_t and
6598         __get_t.
6599         (__check_visitor_result): Remove.
6600         (visit): Use __visit_result_t for return type.
6601         * testsuite/20_util/variant/100384.cc: New test.
6602
6603 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
6604
6605         * acinclude.m4 (GLIBCXX_ENABLE_INT128_FLOAT128): Remove
6606         checks for __int128 and rename to GLIBCXX_ENABLE_FLOAT128.
6607         * config.h.in: Regenerate.
6608         * configure: Regenerate.
6609         * configure.ac: Adjust to use GLIBCXX_ENABLE_FLOAT128.
6610         * include/bits/random.h (_Select_uint_least_t<s, 1>):
6611         Use __SIZEOF_INT128__ to decide whether to use __int128.
6612         * include/std/charconv (__to_chars_unsigned_type): Likewise.
6613
6614 2021-05-03  Gerald Pfeifer  <gerald@pfeifer.com>
6615
6616         * doc/xml/manual/ctype.xml: Move unix.org reference to https.
6617         * doc/html/manual/facets.html: Regenerate.
6618
6619 2021-04-30  Patrick Palka  <ppalka@redhat.com>
6620
6621         * include/std/ranges (__detail::__non_propating_cache): Define
6622         as per P2328.
6623         (join_view): Remove constraints on the value and reference types
6624         of the wrapped iterator type as per P2328.
6625         (join_view::_Iterator::_M_satisfy): Adjust as per P2328.
6626         (join_view::_Iterator::operator++): Likewise.
6627         (join_view::_M_inner): Use __non_propating_cache as per P2328.
6628         Remove now-redundant use of __maybe_present_t.
6629         * testsuite/std/ranges/adaptors/join.cc: Include <array>.
6630         (test10): New test.
6631
6632 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
6633
6634         * include/bits/basic_string.h (__cpp_lib_constexpr_string):
6635         Only define for C++17 and later.
6636         * include/std/version (__cpp_lib_semaphore): Fix condition
6637         to match the one in <semaphore>.
6638
6639 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
6640
6641         * acinclude.m4 (GLIBCXX_CHECK_INT64_T): Delete.
6642         * config.h.in: Regenerate.
6643         * configure: Regenerate.
6644         * configure.ac: Do not use GLIBCXX_CHECK_INT64_T.
6645         * include/bits/postypes.h: Remove include of <stdint.h> and
6646         definition/undefinition of the __STDC_LIMIT_MACROS and
6647         __STDC_CONSTANT_MACROS macros.
6648         (streamoff): Use __INT64_TYPE__ if defined.
6649
6650 2021-04-30  Patrick Palka  <ppalka@redhat.com>
6651
6652         * include/std/ranges (split_view::_InnerIter::operator++):
6653         Depend on _Base instead of _Vp directly, as per LWG 3532.
6654
6655 2021-04-30  Patrick Palka  <ppalka@redhat.com>
6656
6657         * include/bits/ranges_util.h (subrange::subrange): Avoid
6658         list-initialization in delegating constructor.
6659         * include/std/ranges (single_view): Replace implicit guide
6660         with explicit deduction guide that decays its argument.
6661         (_Single::operator()): Avoid CTAD when constructing the
6662         single_view object.
6663         (_Iota::operator()): Avoid list-initialization.
6664         (__detail::__can_filter_view, _Filter::operator()): Likewise.
6665         (__detail::__can_transform_view, _Transform::operator()): Likewise.
6666         (take_view::begin): Likewise.
6667         (__detail::__can_take_view, _Take::operator()): Likewise.
6668         (__detail::__can_take_while_view, _TakeWhile::operator()): Likewise.
6669         (__detail::__can_drop_view, _Drop::operator()): Likewise.
6670         (__detail::__can_drop_while_view, _DropWhile::operator()): Likewise.
6671         (split_view::split_view): Use views::single when initializing
6672         _M_pattern.
6673         (__detail::__can_split_view, _Split::operator()): Avoid
6674         list-initialization.
6675         (_Counted::operator()): Likewise.
6676         * testsuite/std/ranges/p2367.cc: New test.
6677
6678 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
6679
6680         PR libstdc++/60497
6681         * include/bits/basic_ios.tcc (basic_ios::copyfmt): use
6682         std::addressof.
6683         * include/bits/basic_string.tcc (basic_string::swap)
6684         (basic_string::assign): Likewise.
6685         * include/bits/deque.tcc (deque::operator=(const deque&)):
6686         Likewise.
6687         * include/bits/stl_tree.h (_Rb_tree::operator=(const * _Rb_tree&)):
6688         Likewise.
6689         * include/bits/vector.tcc (vector::operator=(const vector&)):
6690         Likewise.
6691
6692 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
6693
6694         * include/std/istream (operator>>(Istream&&, x&)): Simplify, as
6695         per LWG 1203.
6696         * include/std/ostream (operator<<(Ostream&&, const x&)):
6697         Likewise.
6698         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
6699         Adjust dg-error pattern.
6700         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
6701         Likewise.
6702         * testsuite/27_io/basic_istream/extractors_other/char/4.cc: Define
6703         is_extractable trait to replace std::__is_extractable. Make it
6704         work with rvalue streams as well as lvalues, to replace f() and
6705         g() helper functions.
6706         * testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
6707         Likewise.
6708         * testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
6709         Define is_insertable trait to replace std::__is_insertable. Make
6710         it work with rvalue streams as well as lvalues, to replace f()
6711         and g() helper functions.
6712         * testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
6713         Likewise.
6714         * testsuite/27_io/filesystem/path/io/dr2989.cc: Prune additional
6715         errors from new constraints.
6716         * testsuite/27_io/rvalue_streams-2.cc: Remove PR 80675 checks,
6717         which are no longer expected to compile.
6718         * testsuite/27_io/rvalue_streams.cc: Adjust existing test.
6719         Verify LWG 1203 changes.
6720
6721 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
6722
6723         PR libstdc++/100285
6724         * include/experimental/socket (__basic_socket_impl::set_option)
6725         (__basic_socket_impl::get_option) [!_GLIBCXX_HAVE_SYS_SOCKET_H]:
6726         Just set error code.
6727         * testsuite/experimental/net/socket/socket_base.cc: CHeck
6728         for <sys/socket.h> not <socket.h>.
6729
6730 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
6731
6732         PR libstdc++/100180
6733         PR libstdc++/100286
6734         PR libstdc++/100351
6735         * testsuite/experimental/net/internet/address/v4/comparisons.cc:
6736         Use new effective-target keyword.
6737         * testsuite/experimental/net/internet/address/v4/cons.cc:
6738         Likewise.
6739         * testsuite/experimental/net/internet/address/v4/creation.cc:
6740         Likewise.
6741         * testsuite/experimental/net/internet/address/v4/members.cc:
6742         Likewise.
6743         * testsuite/experimental/net/internet/address/v6/members.cc:
6744         Likewise.
6745         * testsuite/experimental/net/internet/resolver/base.cc:
6746         Likewise.
6747         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
6748         Likewise.
6749         * testsuite/experimental/net/internet/resolver/ops/reverse.cc:
6750         Likewise.
6751         * testsuite/experimental/net/internet/socket/opt.cc:
6752         Likewise.
6753         * testsuite/experimental/net/internet/tcp.cc:
6754         Likewise.
6755         * testsuite/experimental/net/internet/udp.cc:
6756         Likewise.
6757         * testsuite/lib/libstdc++.exp (check_effective_target_net_ts_ip):
6758         New proc to check net_ts_ip et.
6759
6760 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
6761
6762         PR libstdc++/97930
6763         * testsuite/20_util/pair/requirements/structural.cc: New test.
6764
6765 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
6766
6767         * include/bits/stl_pair.h (pair) [__cplusplus > 202002]: Add
6768         new definitions for constructors and assignment operators using
6769         concepts for constraints.
6770         * testsuite/20_util/pair/cons/99957.cc: Disable for C++20 and
6771         later.
6772         * testsuite/20_util/pair/cons/explicit_construct.cc: Adjust
6773         expected error messages to also match C++20 errors.
6774
6775 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
6776
6777         PR libstdc++/99957
6778         * include/bits/stl_pair.h (_PCC::_MoveCopyPair, _PCC::_CopyMovePair):
6779         Combine and replace with ...
6780         (_PCC::_DeprConsPair): New SFINAE helper function.
6781         (pair): Merge preprocessor blocks so that all C++03 members
6782         are defined together at the end.
6783         (pair::pair(const _T1&, _U2&&), pair::pair(_U1&&, const _T2&)):
6784         Replace _T1 and _T2 parameters with __null_ptr_constant and
6785         adjust constraints.
6786         * testsuite/20_util/pair/40925.cc: Use nullptr instead of 0.
6787         * testsuite/20_util/pair/cons/explicit_construct.cc: Likewise.
6788         * testsuite/20_util/pair/cons/99957.cc: New test.
6789
6790 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
6791
6792         * include/bits/basic_string.h (__cpp_lib_constexpr_string): Define.
6793         * include/std/version (__cpp_lib_constexpr_string): Define.
6794         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
6795         Check for __cpp_lib_constexpr_string.
6796         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
6797         Likewise.
6798         * testsuite/21_strings/char_traits/requirements/version.cc: New test.
6799
6800 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
6801
6802         * doc/Makefile.am (stamp-pdf-doxygen): Improve comment about
6803         dealing with errors. Use '@' to prevent shell command being
6804         echoed.
6805         * doc/Makefile.in: Regenerate.
6806
6807 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
6808
6809         PR libstdc++/100298
6810         * include/bits/std_thread.h (thread::hardware_concurrency): Add
6811         missing noexcept to inline definition for non-gthreads targets.
6812
6813 2021-04-28  Patrick Palka  <ppalka@redhat.com>
6814
6815         PR libstdc++/100187
6816         PR libstdc++/100237
6817         PR libstdc++/100249
6818         PR libstdc++/100287
6819         * include/bits/ranges_algo.h (__search_n_fn::operator()): Give
6820         the __value_comp lambda an explicit bool return type.
6821         (__is_permutation_fn::operator()): Give the __proj_scan local
6822         variable auto&& return type.  Give the __comp_scan lambda an
6823         explicit bool return type.
6824         (__remove_fn::operator()): Give the __pred lambda an explicit
6825         bool return type.
6826         (__partition_fn::operator()): Don't std::move __first twice
6827         when returning an empty subrange.
6828         (__min_fn::operator()): Don't std::move __comp.
6829         (__max_fn::operator()): Likewise.
6830         (__minmax_fn::operator()): Likewise.
6831
6832 2021-04-27  Patrick Palka  <ppalka@redhat.com>
6833
6834         PR libstdc++/100290
6835         * include/std/ranges (join_view::_Iterator::operator++): Correct
6836         the return type of the lambda to avoid returning a copy of
6837         _M_parent->_M_inner.
6838         * testsuite/std/ranges/adaptors/join.cc (test10): New test.
6839
6840 2021-04-27  Jakub Jelinek  <jakub@redhat.com>
6841
6842         Revert:
6843         2021-04-22  Jakub Jelinek  <jakub@redhat.com>
6844
6845         PR target/100182
6846         * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
6847         ia32.
6848         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
6849         ia32.
6850
6851 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
6852
6853         * include/experimental/internet (address_v6::bytes_type): Adjust
6854         formatting.
6855         (basic_endpoint): Define _M_is_v6() to put all checks for
6856         AF_INET6 in one place.
6857         (basic_endpoint::resize): Simplify.
6858         (operator==(const tcp&, const tcp&)): Add constexpr and noexcept.
6859         (operator!=(const tcp&, const tcp&)): Likewise.
6860         (operator==(const udp&, const udp&)): Likewise.
6861         (operator!=(const udp&, const udp&)): Likewise.
6862         * testsuite/experimental/net/internet/tcp.cc: New test.
6863         * testsuite/experimental/net/internet/udp.cc: New test.
6864
6865 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
6866
6867         PR libstdc++/100286
6868         * include/experimental/internet (resolver_errc, resolver_category())
6869         (make_error_code, make_error_condition): Define unconditionally,
6870         only make enumerators and use of gai_strerror depend on the
6871         availability of <netdb.h>.
6872         (address_v4::to_string): Use correct constant for string length.
6873         (address_v4::to_string, address_v6::to_string): Define
6874         unconditionally, throw if unsupported.
6875         (make_address_v4, make_address_v6): Define unconditionally.
6876         Return an error if unsupported.
6877         (tcp, udp, v6_only, unicast::hops, multicast::*): Define
6878         conditionally,
6879         * testsuite/experimental/net/internet/socket/opt.cc: Check for
6880         <netinet/in.h> and <netinet/tcp.h> before using types from
6881         namespace net::ip.
6882
6883 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
6884
6885         PR libstdc++/100285
6886         * include/experimental/internet (resolver_base::flags):
6887         Define overloaded operators as hidden friends.
6888         * include/experimental/socket (socket_base::message_flags):
6889         Likewise.
6890
6891 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6892
6893         * include/experimental/internet (tcp::no_delay, v6_only)
6894         (unicast::hops, multicast::hops, multicast::enable_loopback):
6895         Change access of base class and static data members. Add
6896         using-declaration for __socket_crtp::operator=(_Tp).
6897         (multicast::__mcastopt): New type.
6898         (multicast::join_group, multicast::leave_group): Derive from
6899         __mcastopt for common implementation.
6900         * include/experimental/socket: Add comment.
6901         * testsuite/experimental/net/internet/socket/opt.cc: New test.
6902         * testsuite/experimental/net/socket/socket_base.cc: Check for
6903         protected constructor/destructor of socket_base. Check for
6904         explicit constructors of socket option classes.
6905
6906 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6907
6908         * include/experimental/bits/net.h (__socket_base): Add
6909         bool template parameter to allow BooleanSocketOption and
6910         IntegerSocketOption to have different __socket_base<int>
6911         base classes.
6912         (__socket_base<bool>): Adjust base class.
6913         (__socket_base<int>): Add partial specialization.
6914         (__socket_crtp::operator=(_Tp)): Add noexcept-specifier.
6915         * include/experimental/socket (socket_base::broadcast)
6916         (socket_base::debug, socket_base::do_not_route)
6917         (socket_base::keep_alive, socket_base::linger)
6918         (socket_base::out_of_band_inline)
6919         (socket_base::receive_buffer_size)
6920         (socket_base::receive_low_watermark)
6921         (socket_base::reuse_address, socket_base::send_buffer_size)
6922         (socket_base::send_low_watermark): Add using-declaration for
6923         __socket_crtp::operator=(_Tp).
6924         * testsuite/experimental/net/socket/socket_base.cc: Check
6925         properties of socket option types.
6926
6927 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6928
6929         * include/experimental/internet (resolver_base::flags): Remove
6930         enumerators. Initialize constants directly with desired values.
6931         Make all operators constexpr and noexcept.
6932         * testsuite/experimental/net/internet/resolver/base.cc: Use
6933         __gnu_test::test_bitmask_values for bitmask type. Check
6934         construction and destruction is protected.
6935
6936 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6937
6938         * include/bits/semaphore_base.h: Include <exception> and <errno.h>.
6939
6940 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6941
6942         PR libstdc++/100259
6943         * include/experimental/internet (net::ip::make_error_code)
6944         (net::ip::make_error_condition, net::ip::make_network_v4)
6945         (net::ip::operator==(const udp&, const udp&)): Add 'inline'.
6946
6947 2021-04-24  David Edelsohn  <dje.gcc@gmail.com>
6948
6949         * testsuite/lib/dg-options.exp (atomic_link_flags): New.
6950         (add_options_for_libatomic): Use atomic_link_flags.
6951
6952 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
6953
6954         PR libstdc++/100180
6955         * include/experimental/io_context (io_context): Define
6956         dummy_pollfd type so that most member functions still compile
6957         without <poll.h> and struct pollfd.
6958
6959 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
6960
6961         * include/experimental/io_context (io_context::async_wait): Add
6962         comment.
6963         * include/experimental/socket (basic_socket::async_connect):
6964         Cast wait_type constant to int.
6965         (basic_datagram_socket::async_receive): Likewise.
6966         (basic_datagram_socket::async_receive_from): Likewise.
6967         (basic_datagram_socket::async_send): Likewise.
6968         (basic_datagram_socket::async_send_to): Likewise.
6969         (basic_stream_socket::async_receive): Likewise.
6970         (basic_stream_socket::async_send): Likewise. Use io_context
6971         parameter directly, instead of via an executor.
6972         (basic_socket_acceptor::async_accept): Likewise.
6973
6974 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
6975
6976         * include/experimental/socket (socket_base::shutdown_type):
6977         (socket_base::wait_type, socket_base::message_flags):
6978         Remove enumerators. Initialize constants directly with desired
6979         values.
6980         (socket_base::message_flags): Make all operators constexpr and
6981         noexcept.
6982         * testsuite/util/testsuite_common_types.h (test_bitmask_values):
6983         New test utility.
6984         * testsuite/experimental/net/socket/socket_base.cc: New test.
6985
6986 2021-04-22  David Edelsohn  <dje.gcc@gmail.com>
6987
6988         * config/os/aix/atomicity.h: Delete.
6989
6990 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
6991
6992         * include/bits/atomic_timed_wait.h (__cond_wait_until_impl):
6993         Handle system_clock as well as steady_clock.
6994         * testsuite/30_threads/semaphore/try_acquire_for.cc: Re-enable.
6995         * testsuite/30_threads/semaphore/try_acquire_until.cc:
6996         Re-enable.
6997
6998 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
6999
7000         * testsuite/30_threads/semaphore/try_acquire_posix.cc: Add
7001         options for libatomic.
7002
7003 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
7004
7005         * config/os/gnu-linux/os_defines.h: Fix type in comment.
7006
7007 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
7008
7009         PR libstdc++/99006
7010         * include/bits/shared_ptr.h (allocate_shared): Assert that _Tp
7011         is not an array type.
7012         * include/bits/shared_ptr_base.h (__allocate_shared): Likewise.
7013         * testsuite/20_util/shared_ptr/creation/99006.cc: New test.
7014
7015 2021-04-22  Thomas Rodgers  <rodgert@twrodgers.com>
7016
7017         * include/bits/atomic_wait.h: Always notify waiters in the
7018         case of 'bare' address notification.
7019
7020 2021-04-22  Jakub Jelinek  <jakub@redhat.com>
7021
7022         PR target/100182
7023         * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
7024         ia32.
7025         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
7026         ia32.
7027
7028 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
7029
7030         PR libstdc++/100179
7031         * include/bits/semaphore_base.h: Remove #error.
7032         * include/std/semaphore: Do not define anything unless one of
7033         the implementations is available.
7034
7035 2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>
7036
7037         * include/bits/semaphore_base.h: Always reload __old in
7038         __atomic_semaphore::_S_do_try_acquire().
7039         * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
7040         re-enable testcase.
7041
7042 2021-04-21  Philippe Blain  <levraiphilippeblain@gmail.com>
7043             Jonathan Wakely  <jwakely@redhat.com>
7044
7045         PR libstdc++/99453
7046         * python/Makefile.am: Install libstdc++*-gdb.py more robustly.
7047         * python/Makefile.in: Regenerate.
7048
7049 2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>
7050
7051         * include/bits/semaphore_base.h: Add missing _M_try_acquire()
7052         member to __platform_wait.
7053
7054 2021-04-21  Jonathan Wakely  <jwakely@redhat.com>
7055
7056         * include/std/latch: Replace tab characters in license text.
7057         * include/std/semaphore: Likewise.
7058
7059 2021-04-21  Jakub Jelinek  <jakub@redhat.com>
7060
7061         PR libstdc++/100164
7062         * acinclude.m4: For POSIX semaphores AC_DEFINE HAVE_POSIX_SEMAPHORE
7063         rather than _GLIBCXX_HAVE_POSIX_SEMAPHORE.
7064         * configure: Regenerated.
7065         * config.h.in: Regenerated.
7066
7067 2021-04-20  Jonathan Wakely  <jwakely@redhat.com>
7068
7069         * testsuite/30_threads/semaphore/try_acquire_for.cc: Disable
7070         test for targets not using futexes for semaphores.
7071         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
7072         * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
7073         Disable for all targets.
7074
7075 2021-04-20  Thomas Rodgers  <trodgers@redhat.com>
7076
7077         * include/Makefile.am: Add new <bits/this_thread_sleep.h> header.
7078         * include/Makefile.in: Regenerate.
7079         * include/bits/this_thread_sleep.h: New file.
7080         * include/bits/atomic_base.h: Adjust all calls
7081         to __atomic_wait/__atomic_notify for new call signatures.
7082         * include/bits/atomic_timed_wait.h: Extensive rewrite.
7083         * include/bits/atomic_wait.h: Likewise.
7084         * include/bits/semaphore_base.h: Adjust all calls
7085         to __atomic_wait/__atomic_notify for new call signatures.
7086         * include/std/atomic: Likewise.
7087         * include/std/barrier: Likewise.
7088         * include/std/latch: Likewise.
7089         * include/std/semaphore: Likewise.
7090         * include/std/thread (this_thread::sleep_for)
7091         (this_thread::sleep_until): Move to new header.
7092         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Simplify
7093         test.
7094         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
7095         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
7096         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
7097         * testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
7098         * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
7099         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
7100
7101 2021-04-20  Patrick Palka  <ppalka@redhat.com>
7102
7103         PR libstdc++/95983
7104         * include/bits/stl_iterator.h (__detail::__move_iter_cat):
7105         Define.
7106         (move_iterator): Derive from the above in C++20 in order to
7107         conditionally define iterator_category as per P2259.
7108         (move_iterator::__base_cat): No longer used, so remove.
7109         (move_iterator::iterator_category): Remove in C++20.
7110         (__detail::__common_iter_use_postfix_proxy): Define.
7111         (common_iterator::_Proxy): Rename to ...
7112         (common_iterator:__arrow_proxy): ... this.
7113         (common_iterator::__postfix_proxy): Define as per P2259.
7114         (common_iterator::operator->): Adjust.
7115         (common_iterator::operator++): Adjust as per P2259.
7116         (iterator_traits<common_iterator>::_S_iter_cat): Define.
7117         (iterator_traits<common_iterator>::iterator_category): Change as
7118         per P2259.
7119         (__detail::__counted_iter_value_type): Define.
7120         (__detail::__counted_iter_concept): Define.
7121         (__detail::__counted_iter_cat): Define.
7122         (counted_iterator): Derive from the above three classes in order
7123         to conditionally define value_type, iterator_concept and
7124         iterator category respectively as per P2259.
7125         (counted_iterator::operator->): Define as per P2259.
7126         (incrementable_traits<counted_iterator>): Remove as per P2259.
7127         (iterator_traits<counted_iterator>): Adjust as per P2259.
7128         * include/std/ranges (__detail::__iota_view_iter_cat): Define.
7129         (iota_view::_Iterator): Derive from the above in order to
7130         conditionally define iterator_category as per P2259.
7131         (iota_view::_S_iter_cat): Rename to ...
7132         (iota_view::_S_iter_concept): ... this.
7133         (iota_view::iterator_concept): Use it to apply LWG 3291 changes.
7134         (iota_view::iterator_category): Remove.
7135         (__detail::__filter_view_iter_cat): Define.
7136         (filter_view::_Iterator): Derive from the above in order to
7137         conditionally define iterator_category as per P2259.
7138         (filter_view::_Iterator): Move to struct __filter_view_iter_cat.
7139         (filter_view::_Iterator::iterator_category): Remove.
7140         (transform_view::_Base): Define.
7141         (transform_view::__iter_cat): Define.
7142         (transform_view::_Iterator): Derive from the above in order to
7143         conditionally define iterator_category as per P2259.
7144         (transform_view::_Iterator::_Base): Just alias
7145         transform_view::_Base.
7146         (transform_view::_Iterator::_S_iter_cat): Move to struct
7147         transform_view::__iter_cat.
7148         (transform_view::_Iterator::iterator_category): Remove.
7149         (transform_view::_Sentinel::_Base): Just alias
7150         transform_view::_Base.
7151         (join_view::_Base): Define.
7152         (join_view::_Outer_iter): Define.
7153         (join_view::_Inner_iter): Define.
7154         (join_view::_S_ref_is_glvalue): Define.
7155         (join_view::__iter_cat): Define.
7156         (join_view::_Iterator): Derive from it in order to conditionally
7157         define iterator_category as per P2259.
7158         (join_view::_Iterator::_Base): Just alias join_view::_Base.
7159         (join_view::_Iterator::_S_ref_is_glvalue): Just alias
7160         join_view::_S_ref_is_glvalue.
7161         (join_view::_Iterator::_S_iter_cat): Move to struct
7162         transform_view::__iter_cat.
7163         (join_view::_Iterator::_Outer_iter): Just alias
7164         join_view::_Outer_iter.
7165         (join_view::_Iterator::_Inner_iter): Just alias
7166         join_view::_Inner_iter.
7167         (join_view::_Iterator::iterator_category): Remove.
7168         (join_view::_Sentinel::_Base): Just alias join_view::_Base.
7169         (__detail::__split_view_outer_iter_cat): Define.
7170         (__detail::__split_view_inner_iter_cat): Define.
7171         (split_view::_Base): Define.
7172         (split_view::_Outer_iter): Derive from __split_view_outer_iter_cat
7173         in order to conditionally define iterator_category as per P2259.
7174         (split_view::_Outer_iter::iterator_category): Remove.
7175         (split_view::_Inner_iter): Derive from __split_view_inner_iter_cat
7176         in order to conditionally define iterator_category as per P2259.
7177         (split_view::_Inner_iter::_S_iter_cat): Move to
7178         __split_view_inner_iter_cat.
7179         (split_view::_Inner_iter::iterator_category): Remove.
7180         (elements_view::_Base): Define.
7181         (elements_view::__iter_cat): Define.
7182         (elements_view::_Iterator): Derive from the above in order to
7183         conditionall define iterator_category as per P2259.
7184         (elements_view::_Iterator::_Base): Just alias
7185         elements_view::_Base.
7186         (elements_view::_Iterator::_S_iter_concept)
7187         (elements_view::_Iterator::iterator_concept): Define as per
7188         P2259.
7189         (elements_view::_Iterator::iterator_category): Remove.
7190         (elements_view::_Sentinel::_Base): Just alias
7191         elements_view::_Base.
7192         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
7193         Adjust constraints on iterator_traits<counted_iterator>.
7194         * testsuite/std/ranges/p2259.cc: New test.
7195
7196 2021-04-20  Jonathan Wakely  <jwakely@redhat.com>
7197
7198         PR libstdc++/100146
7199         * include/std/charconv (__cpp_lib_to_chars): Define
7200         conditionally.
7201         * include/std/version (__cpp_lib_to_chars): Likewise..
7202         * testsuite/20_util/from_chars/4.cc: Only check feature test
7203         macro, not _GLIBCXX_HAVE_USELOCALE.
7204         * testsuite/20_util/from_chars/5.cc: Likewise.
7205         * testsuite/20_util/from_chars/6.cc: Likewise.
7206         * testsuite/20_util/to_chars/long_double.cc: Likewise.
7207
7208 2021-04-20  Jakub Jelinek  <jakub@redhat.com>
7209
7210         * testsuite/util/testsuite_abi.cc (compare_symbols): If any symbol
7211         versions with _IEEE128_ substring are found, set ieee_version_found
7212         to true.  Ignore missing symbols with _IEEE128_ in version name if
7213         !ieee_version_found.  Use i->first as version_name instead of
7214         i->second.version_name if the latter is empty.
7215         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
7216
7217 2021-04-19  H.J. Lu  <hjl.tools@gmail.com>
7218
7219         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt:
7220         Updated.
7221
7222 2021-04-17  Jakub Jelinek  <jakub@redhat.com>
7223
7224         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
7225         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
7226
7227 2021-04-17  Jakub Jelinek  <jakub@redhat.com>
7228
7229         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
7230         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
7231         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
7232         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
7233         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
7234         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
7235
7236 2021-04-15  Jonathan Wakely  <jwakely@redhat.com>
7237
7238         * testsuite/lib/dg-options.exp (add_options_for_libatomic): Also
7239         add libatomic options for 32-bit sparc*-*-linux-gnu.
7240
7241 2021-04-15  Jonathan Wakely  <jwakely@redhat.com>
7242
7243         PR libstdc++/96657
7244         * libsupc++/Makefile.am: Add atomicity.cc here.
7245         * src/c++98/Makefile.am: Remove it from here.
7246         * libsupc++/Makefile.in: Regenerate.
7247         * src/c++98/Makefile.in: Regenerate.
7248         * testsuite/18_support/exception_ptr/96657.cc: New test.
7249
7250 2021-04-13  Jonathan Wakely  <jwakely@redhat.com>
7251
7252         PR libstdc++/100060
7253         * include/std/bit: Only include <ext/numeric_traits.h> for
7254         hosted build, use <limits> otherwise.
7255
7256 2021-04-13  Jonathan Wakely  <jwakely@redhat.com>
7257
7258         * doc/xml/manual/backwards_compatibility.xml: Remove porting
7259         notes for libg++ and libstdc++-v2, and bibliography.
7260         * doc/html/*: Regenerated.
7261
7262 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
7263
7264         PR libstdc++/100044
7265         * include/bits/ranges_util.h (__detail::__iterator_sentinel_pair):
7266         Remove helper concept.
7267         (subrange(_Pr), subrange(Pr, __make_unsigned_like<...>)): Remove
7268         deduction guides, as per LWG 3404.
7269         * testsuite/std/ranges/subrange/lwg3282_neg.cc: Check that class
7270         template argument deduction fails.
7271
7272 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
7273
7274         * testsuite/26_numerics/random/linear_congruential_engine/requirements/non_uint_neg.cc:
7275         Adjust expected error for C++20 mode.
7276         * testsuite/tr1/5_numerical_facilities/random/linear_congruential/requirements/non_uint_neg.cc:
7277         Likewise.
7278
7279 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
7280
7281         PR libstdc++/99995
7282         * testsuite/17_intro/headers/c++1998/49745.cc: Include all
7283         standard headers and XFAIL for effective-target c++20.
7284
7285 2021-04-09  François Dumont  <fdumont@gcc.gnu.org>
7286
7287         PR libstdc++/99402
7288         * include/debug/helper_functions.h (__can_advance(_InputIterator,
7289         const std::pair<_Diff, _Distance_precision>&, int)): New.
7290         (__can_advance(const _Safe_iterator<>&,
7291         const std::pair<_Diff, _Distance_precision>&, int)): New.
7292         * include/debug/macros.h (__glibcxx_check_can_increment_dist): New,
7293         use latter.
7294         (__glibcxx_check_can_increment_range): Adapt to use latter.
7295         (__glibcxx_check_can_decrement_range): Likewise.
7296         * include/debug/safe_iterator.h
7297         (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
7298         int)): New.
7299         (__can_advance(const _Safe_iterator<>&,
7300         const std::pair<_Diff, _Distance_precision>&, int)): New.
7301         * include/debug/safe_iterator.tcc
7302         (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
7303         int)): New.
7304         (_Safe_iterator<>::_M_valid_range(const _Safe_iterator<>&,
7305         std::pair<difference_type, _Distance_precision>&, bool)): Adapt for
7306         __dp_sign_max_size.
7307         (__copy_move_a): Adapt to use __glibcxx_check_can_increment_dist.
7308         (__copy_move_backward_a): Likewise.
7309         (__equal_aux): Likewise.
7310         * include/debug/stl_iterator.h (__can_advance(const std::reverse_iterator<>&,
7311         const std::pair<_Diff, _Distance_precision>&, int)): New.
7312         (__can_advance(const std::move_iterator<>&,
7313         const std::pair<_Diff, _Distance_precision>&, int)): New.
7314         * testsuite/25_algorithms/copy/debug/99402.cc: New test.
7315
7316 2021-04-09  Jonathan Wakely  <jwakely@redhat.com>
7317
7318         PR libstdc++/99985
7319         * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()): Fix
7320         to be a valid constexpr function in C++11.
7321         * testsuite/23_containers/unordered_set/cons/99985.cc: New test.
7322
7323 2021-04-09  Jonathan Wakely  <jwakely@redhat.com>
7324
7325         * include/bits/fs_fwd.h: Fix doxygen group command.
7326         * include/bits/streambuf_iterator.h: Likewise.
7327         * include/bits/uses_allocator_args.h: Likewise.
7328         * include/std/memory: Likewise.
7329         * include/tr1/complex: Likewise.
7330
7331 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
7332
7333         * include/bits/basic_string.h: Tweak doxygen comment.
7334
7335 2021-04-08  Patrick Palka  <ppalka@redhat.com>
7336
7337         * include/std/ranges (__detail::find): Define.
7338         (split_view::_OuterIter::operator++): Apply proposed resolution
7339         of LWG 3505.
7340         * testsuite/std/ranges/adaptors/split.cc (test10): New test.
7341
7342 2021-04-08  Patrick Palka  <ppalka@redhat.com>
7343
7344         * include/std/ranges (__detail::find_if): Simplify.
7345         (__detail::find_if_not): Likewise.
7346         (__detail::min): Remove.
7347         (__detail::mismatch): Simplify.
7348         (take_view::size): Use std::min instead of __detail::min.
7349
7350 2021-04-08  Patrick Palka  <ppalka@redhat.com>
7351
7352         * include/std/ranges (__detail::__returnable_element): New
7353         concept.
7354         (elements_view): Use this concept in its constraints.  Add
7355         missing private access specifier.
7356         (elements_view::_S_get_element): Define as per LWG 3502.
7357         (elements_view::operator*, elements_view::operator[]): Use
7358         _S_get_element.
7359         (elements_view::operator++): Remove unnecessary constraint
7360         as per LWG 3492.
7361         * testsuite/std/ranges/adaptors/elements.cc (test05): New test.
7362
7363 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
7364
7365         * doc/Makefile.am (stamp-pdf-doxygen): Also grep for
7366         out-of-memory error in log file.
7367         * doc/Makefile.in: Regenerate.
7368
7369 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
7370
7371         * configure: Regenerate.
7372
7373 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
7374
7375         * include/bits/random.h: Fix doxygen group commands.
7376         * include/bits/regex_constants.h: Likewise.
7377         * include/tr1/random.h: Likewise.
7378
7379 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
7380
7381         * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()):
7382         New function to determine noexcept-specifier for move
7383         constructors.
7384         (_Hashtable): Use _S_nothrow_move() on move constructors.
7385         * testsuite/23_containers/unordered_map/cons/noexcept_move_construct.cc:
7386         Correct static assertion message.
7387         * testsuite/23_containers/unordered_multimap/cons/noexcept_move_construct.cc:
7388         Likewise.
7389         * testsuite/23_containers/unordered_multiset/cons/noexcept_move_construct.cc:
7390         Likewise.
7391         * testsuite/23_containers/unordered_set/cons/noexcept_move_construct.cc:
7392         Likewise.
7393
7394 2021-04-08  Patrick Palka  <ppalka@redhat.com>
7395
7396         PR libstdc++/98384
7397         * testsuite/20_util/to_chars/long_double.cc: Don't run the test
7398         on targets without a large long double.  XFAIL the execution on
7399         targets with a non-conforming printf.
7400
7401 2021-04-08  Patrick Palka  <ppalka@redhat.com>
7402
7403         PR libstdc++/99433
7404         * include/std/ranges (__adaptor::__maybe_refwrap): Remove.
7405         (__adaptor::__adaptor_invocable): New concept.
7406         (__adaptor::__adaptor_partial_app_viable): New concept.
7407         (__adaptor::_RangeAdaptorClosure): Rewrite, turning it into a
7408         non-template base class.
7409         (__adaptor::_RangeAdaptor): Rewrite, turning it into a CRTP base
7410         class template.
7411         (__adaptor::_Partial): New class template that represents
7412         partial application of a range adaptor non-closure.
7413         (__adaptor::__pipe_invocable): New concept.
7414         (__adaptor::_Pipe): New class template.
7415         (__detail::__can_ref_view): New concept.
7416         (__detail::__can_subrange): New concept.
7417         (all): Replace the lambda here with ...
7418         (_All): ... this functor.  Add appropriate constraints.
7419         (__detail::__can_filter_view): New concept.
7420         (filter, _Filter): As in all/_All.
7421         (__detail::__can_transform): New concept.
7422         (transform, _Transform): As in all/_All.
7423         (__detail::__can_take_view): New concept.
7424         (take, _Take): As in all/_All.
7425         (__detail::__can_take_while_view): New concept.
7426         (take_while, _TakeWhile): As in all/_All.
7427         (__detail::__can_drop_view): New concept.
7428         (drop, _Drop): As in all/_All.
7429         (__detail::__can_drop_while_view): New concept.
7430         (drop_while, _DropWhile): As in all/_All.
7431         (__detail::__can_join_view): New concept.
7432         (join, _Join): As in all/_All.
7433         (__detail::__can_split_view): New concept.
7434         (split, _Split): As in all/_All.  Rename template parameter
7435         _Fp to _Pattern.
7436         (__detail::__already_common): New concept.
7437         (__detail::__can_common_view): New concept.
7438         (common, _Common): As in all/_All.
7439         (__detail::__can_reverse_view): New concept.
7440         (reverse, _Reverse): As in all/_All.
7441         (__detail::__can_elements_view): New concept.
7442         (elements, _Elements): As in all/_All.
7443         (keys, values): Adjust.
7444         * testsuite/std/ranges/adaptors/99433.cc: New test.
7445         * testsuite/std/ranges/adaptors/all.cc: No longer expect that
7446         adding empty range adaptor closure objects to a pipeline doesn't
7447         increase the size of the pipeline.
7448         (test05): New test.
7449         * testsuite/std/ranges/adaptors/common.cc (test03): New test.
7450         * testsuite/std/ranges/adaptors/drop.cc (test09): New test.
7451         * testsuite/std/ranges/adaptors/drop_while.cc (test04): New test.
7452         * testsuite/std/ranges/adaptors/elements.cc (test04): New test.
7453         * testsuite/std/ranges/adaptors/filter.cc (test06): New test.
7454         * testsuite/std/ranges/adaptors/join.cc (test09): New test.
7455         * testsuite/std/ranges/adaptors/p2281.cc: New test.
7456         * testsuite/std/ranges/adaptors/reverse.cc (test07): New test.
7457         * testsuite/std/ranges/adaptors/split.cc (test01, test04):
7458         Adjust.
7459         (test09): New test.
7460         * testsuite/std/ranges/adaptors/split_neg.cc (test01): Adjust
7461         expected error message.
7462         (test02): Likewise.  Extend test.
7463         * testsuite/std/ranges/adaptors/take.cc (test06): New test.
7464         * testsuite/std/ranges/adaptors/take_while.cc (test05): New test.
7465         * testsuite/std/ranges/adaptors/transform.cc (test07, test08):
7466         New test.
7467
7468 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
7469
7470         * include/std/string_view: Adjust Doxygen @file comment.
7471
7472 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
7473
7474         * include/std/type_traits (is_scoped_enum<T>): Constrain partial
7475         specialization to not match incomplete enum types. Use a
7476         requires-expression instead of instantiating is_convertible.
7477         (is_scoped_enum<const T>): Add as workaround for PR c++/99968.
7478         * testsuite/20_util/is_scoped_enum/value.cc: Check with
7479         incomplete types and opaque-enum-declarations.
7480
7481 2021-04-07  Jonathan Wakely  <jwakely@redhat.com>
7482
7483         PR libstdc++/99805
7484         * src/c++17/fs_path.cc (path::_M_split_cmpts): Do not call
7485         non-const member on _M_pathname, to avoid copy-on-write.
7486         * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
7487         Check construction from strings that might be shared.
7488
7489 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
7490
7491         * include/bits/move.h (forward, move, move_if_noexcept)
7492         (addressof): Add _GLIBCXX_NODISCARD.
7493         * include/bits/ranges_cmp.h (identity::operator()): Add
7494         nodiscard attribute.
7495         * include/c_global/cstddef (to_integer): Likewise.
7496         * include/std/bit (bit_cast): Likewise.
7497         * include/std/utility (as_const, to_underlying): Likewise.
7498
7499 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
7500
7501         * include/bits/move.h (forward): Change static_assert message
7502         to be unambiguous about what must be true.
7503         * testsuite/20_util/forward/c_neg.cc: Adjust dg-error.
7504         * testsuite/20_util/forward/f_neg.cc: Likewise.
7505
7506 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
7507
7508         * include/bits/alloc_traits.h: Use markdown for code font.
7509         * include/bits/basic_string.h: Fix @param names.
7510         * include/bits/max_size_type.h: Remove period after @file.
7511         * include/bits/regex.h: Fix duplicate @retval names, and rename.
7512         * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp: Add
7513         group open to match existing group close.
7514         * include/ext/pb_ds/priority_queue.hpp: Add blank line before group
7515         open.
7516
7517 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
7518
7519         * include/bits/atomic_base.h: Fix doxygen group close.
7520         * include/bits/basic_ios.h: Likewise.
7521         * include/bits/forward_list.h: Likewise.
7522         * include/bits/fs_dir.h: Likewise.
7523         * include/bits/fs_ops.h: Likewise.
7524         * include/bits/fs_path.h: Likewise.
7525         * include/bits/functional_hash.h: Likewise.
7526         * include/bits/gslice.h: Likewise.
7527         * include/bits/gslice_array.h: Likewise.
7528         * include/bits/hashtable_policy.h: Likewise.
7529         * include/bits/indirect_array.h: Likewise.
7530         * include/bits/locale_classes.h: Likewise.
7531         * include/bits/locale_facets.h: Likewise.
7532         * include/bits/locale_facets_nonio.h: Likewise.
7533         * include/bits/mask_array.h: Likewise.
7534         * include/bits/refwrap.h: Likewise.
7535         * include/bits/regex.h: Likewise.
7536         * include/bits/regex_automaton.h: Likewise.
7537         * include/bits/regex_compiler.h: Likewise.
7538         * include/bits/regex_constants.h: Likewise.
7539         * include/bits/regex_error.h: Likewise.
7540         * include/bits/regex_executor.h: Likewise.
7541         * include/bits/regex_scanner.h: Likewise.
7542         * include/bits/shared_ptr.h: Likewise.
7543         * include/bits/shared_ptr_atomic.h: Likewise.
7544         * include/bits/shared_ptr_base.h: Likewise.
7545         * include/bits/slice_array.h: Likewise.
7546         * include/bits/specfun.h: Likewise.
7547         * include/bits/std_function.h: Likewise.
7548         * include/bits/std_mutex.h: Likewise.
7549         * include/bits/stl_deque.h: Likewise.
7550         * include/bits/stl_iterator.h: Likewise.
7551         * include/bits/stl_iterator_base_types.h: Likewise.
7552         * include/bits/stl_map.h: Likewise.
7553         * include/bits/stl_multimap.h: Likewise.
7554         * include/bits/stl_multiset.h: Likewise.
7555         * include/bits/stl_numeric.h: Likewise.
7556         * include/bits/stl_pair.h: Likewise.
7557         * include/bits/stl_set.h: Likewise.
7558         * include/bits/stl_uninitialized.h: Likewise.
7559         * include/bits/stream_iterator.h: Likewise.
7560         * include/bits/streambuf_iterator.h: Likewise.
7561         * include/bits/unique_ptr.h: Likewise.
7562         * include/bits/unordered_map.h: Likewise.
7563         * include/bits/unordered_set.h: Likewise.
7564         * include/decimal/decimal: Likewise.
7565         * include/experimental/any: Likewise.
7566         * include/experimental/array: Likewise.
7567         * include/experimental/bits/fs_dir.h: Likewise.
7568         * include/experimental/bits/fs_fwd.h: Likewise.
7569         * include/experimental/bits/fs_ops.h: Likewise.
7570         * include/experimental/bits/fs_path.h: Likewise.
7571         * include/experimental/buffer: Likewise.
7572         * include/experimental/internet: Likewise.
7573         * include/experimental/optional: Likewise.
7574         * include/experimental/propagate_const: Likewise.
7575         * include/experimental/socket: Likewise.
7576         * include/ext/pb_ds/assoc_container.hpp: Likewise.
7577         * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp:
7578         Likewise.
7579         * include/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp: Likewise.
7580         * include/ext/pb_ds/detail/trie_policy/node_metadata_selector.hpp: Likewise.
7581         * include/ext/pb_ds/detail/types_traits.hpp: Likewise.
7582         * include/ext/pb_ds/exception.hpp: Likewise.
7583         * include/ext/pb_ds/priority_queue.hpp: Likewise.
7584         * include/ext/pb_ds/tag_and_trait.hpp: Likewise.
7585         * include/ext/random: Likewise.
7586         * include/std/any: Likewise.
7587         * include/std/atomic: Likewise.
7588         * include/std/bitset: Likewise.
7589         * include/std/chrono: Likewise.
7590         * include/std/complex: Likewise.
7591         * include/std/condition_variable: Likewise.
7592         * include/std/fstream: Likewise.
7593         * include/std/future: Likewise.
7594         * include/std/iostream: Likewise.
7595         * include/std/istream: Likewise.
7596         * include/std/mutex: Likewise.
7597         * include/std/numeric: Likewise.
7598         * include/std/ostream: Likewise.
7599         * include/std/ratio: Likewise.
7600         * include/std/shared_mutex: Likewise.
7601         * include/std/stdexcept: Likewise.
7602         * include/std/streambuf: Likewise.
7603         * include/std/system_error: Likewise.
7604         * include/std/thread: Likewise.
7605         * include/std/valarray: Likewise.
7606         * include/std/variant: Likewise.
7607         * include/tr1/cmath: Likewise.
7608         * include/tr1/regex: Likewise.
7609         * include/tr2/dynamic_bitset: Likewise.
7610         * libsupc++/atomic_lockfree_defines.h: Likewise.
7611         * libsupc++/exception: Likewise.
7612         * libsupc++/exception.h: Likewise.
7613         * libsupc++/exception_ptr.h: Likewise.
7614         * libsupc++/nested_exception.h: Likewise.
7615
7616 2021-03-31  Alexandre Oliva  <oliva@adacore.com>
7617
7618         * testsuite/30_threads/future/members/poll.cc: Use faster
7619         after-ready call in the calibration loop.
7620
7621 2021-03-29  Jonathan Wakely  <jwakely@redhat.com>
7622
7623         * doc/xml/manual/status_cxx2017.xml: Adjust link for PSTL.
7624         * doc/html/manual/status.html: Regenerate.
7625
7626 2021-03-28  François Dumont  <fdumont@gcc.gnu.org>
7627
7628         * include/debug/forward_list
7629         (forward_list(forward_list&&, const allocator_type&)): Add noexcept qualification.
7630         * include/debug/list (list(list&&, const allocator_type&)): Likewise and add
7631         call to safe container allocator aware move constructor.
7632         * include/debug/vector (vector(vector&&, const allocator_type&)):
7633         Fix noexcept qualification.
7634         * testsuite/23_containers/forward_list/cons/noexcept_move_construct.cc:
7635         Add allocator-extended move constructor noexceot qualification check.
7636         * testsuite/23_containers/list/cons/noexcept_move_construct.cc: Likewise.
7637
7638 2021-03-26  Jonathan Wakely  <jwakely@redhat.com>
7639
7640         * src/c++11/random.cc (USE_LCG): Define when a pseudo-random
7641         fallback is needed.
7642         [USE_LCG] (bad_seed, construct_lcg_at, destroy_lcg_at, __lcg):
7643         New helper functions and callback.
7644         (random_device::_M_init): Add 'prng' and 'all' enumerators.
7645         Replace switch with fallthrough with a series of 'if' statements.
7646         [USE_LCG]: Construct an lcg_type engine and use __lcg when cpuid
7647         checks fail.
7648         (random_device::_M_init_pretr1) [USE_MT19937]: Accept "prng"
7649         token.
7650         (random_device::_M_getval): Check for callback unconditionally
7651         and always pass _M_file pointer.
7652         * testsuite/26_numerics/random/random_device/85494.cc: Remove
7653         effective-target check. Use new random_device_available helper.
7654         * testsuite/26_numerics/random/random_device/94087.cc: Likewise.
7655         * testsuite/26_numerics/random/random_device/cons/default-cow.cc:
7656         Remove effective-target check.
7657         * testsuite/26_numerics/random/random_device/cons/default.cc:
7658         Likewise.
7659         * testsuite/26_numerics/random/random_device/cons/token.cc: Use
7660         new random_device_available helper. Test "prng" token.
7661         * testsuite/util/testsuite_random.h (random_device_available):
7662         New helper function.
7663
7664 2021-03-25  François Dumont  <fdumont@gcc.gnu.org>
7665
7666         * include/debug/string
7667         (basic_string(const basic_string&, const _Alloc&)): Define even if !_GLIBCXX_USE_CXX11_ABI.
7668         (basic_string(basic_string&&, const _Alloc&)): Likewise and add noexcept qualification.
7669         (basic_string<>::erase): Adapt to take __const_iterator.
7670         (basic_string(const _CharT*, const _Allocator&)): Remove assign call.
7671         (basic_string<>::insert(const_iterator, _InputIte, _InputIte)): Try to
7672         remove iterator debug layer even if !_GLIBCXX_USE_CXX11_ABI.
7673         [_GLIBCXX_USE_CHAR8_T] (__gnu_debug::u8string): New.
7674         (__gnu_debug::u16string, __gnu_debug::u32string): New.
7675         (std::hash<__gnu_debug::basic_string<>>): New partial specialization.
7676         (std::__is_fast_hash<__gnu_debug::basic_string<>>): Likewise.
7677         * testsuite/util/exception/safety.h
7678         (erase_base<__gnu_debug::basic_string<>>): New partial specialization.
7679         (insert_base<__gnu_debug::basic_string<>>): Likewise.
7680         * testsuite/util/testsuite_container_traits.h (traits<__gnu_debug::basic_string<>>):
7681         New partial specialization.
7682         * testsuite/21_strings/basic_string/hash/debug.cc: New test.
7683         * testsuite/21_strings/basic_string/requirements/citerators.cc:
7684         Add test on __gnu_debug::string.
7685         * testsuite/21_strings/basic_string/requirements/dr438/constructor.cc: Likewise.
7686         * testsuite/21_strings/basic_string/requirements/exception/basic.cc: Likewise.
7687         * testsuite/21_strings/basic_string/requirements/exception/generation_prohibited.cc:
7688         Likewise.
7689         * testsuite/21_strings/basic_string/requirements/exception/propagation_consistent.cc:
7690         Likewise.
7691         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char/1.cc:
7692         Likewise.
7693         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char16_t/1.cc:
7694         Likewise.
7695         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char32_t/1.cc:
7696         Likewise.
7697         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char8_t/1.cc:
7698         Likewise.
7699         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/wchar_t/1.cc:
7700         Likewise.
7701         * testsuite/21_strings/basic_string/requirements/typedefs.cc: Likewise.
7702
7703 2021-03-25  Jakub Jelinek  <jakub@redhat.com>
7704
7705         PR c++/99672
7706         * testsuite/18_support/source_location/consteval.cc (main): Adjust
7707         expected column numbers.
7708         * testsuite/18_support/source_location/1.cc (main): Likewise.
7709
7710 2021-03-25  Jonathan Wakely  <jwakely@redhat.com>
7711
7712         * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare malloc.
7713
7714 2021-03-25  Jonathan Wakely  <jwakely@redhat.com>
7715
7716         * testsuite/util/exception/safety.h (setup_base::generate):
7717         Support seeding random engine.
7718         (erase_point, erase_range): Adjust range of random numbers to
7719         ensure dereferenceable iterators are used where required.
7720         (generation_prohibited::run): Do not try to erase from empty
7721         containers.
7722         * testsuite/util/testsuite_containergen.h (test_containers):
7723         Support seeding random engine.
7724
7725 2021-03-23  Jonathan Wakely  <jwakely@redhat.com>
7726
7727         * testsuite/std/ranges/adaptors/reverse.cc: Replace duplicated
7728         line with a check that uses the const being/end overloads.
7729
7730 2021-03-23  Moritz Sichert  <sichert@in.tum.de>
7731
7732         * include/std/ranges (reverse_view::begin, reverse_view::end):
7733         Qualify make_reverse_iterator calls to avoid ADL.
7734         * testsuite/std/ranges/adaptors/reverse.cc: Test that
7735         views::reverse works when make_reverse_iterator is defined
7736         in an associated namespace.
7737
7738 2021-03-23  Jonathan Wakely  <jwakely@redhat.com>
7739
7740         * include/bits/c++config (_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT):
7741         Do not define when compiling with Clang.
7742
7743 2021-03-22  Jonathan Wakely  <jwakely@redhat.com>
7744
7745         * include/std/string_view (basic_string_view(Range&&)): Define new
7746         constructor and deduction guide.
7747         * testsuite/21_strings/basic_string_view/cons/char/range_c++20.cc: New test.
7748         * testsuite/21_strings/basic_string_view/cons/wchar_t/range_c++20.cc: New test.
7749
7750 2021-03-22  Jonathan Wakely  <jwakely@redhat.com>
7751
7752         * include/bits/range_access.h (begin(T (&)[N]), end(T (&)[N])):
7753         Add missing 'noexcept' as per LWG 2280.
7754         (rbegin(T (&)[N]), rend(T (&)[N]), rbegin(initializer_list<T>))
7755         (rend(initializer_list<T>)): Add 'noexcept' as per LWG 3537.
7756         * testsuite/24_iterators/range_access/range_access.cc: Check for
7757         expected noexcept specifiers. Check result types of generic
7758         std::begin and std::end overloads.
7759         * testsuite/24_iterators/range_access/range_access_cpp14.cc:
7760         Check for expected noexcept specifiers.
7761         * testsuite/24_iterators/range_access/range_access_cpp17.cc:
7762         Likewise.
7763
7764 2021-03-19  Jonathan Wakely  <jwakely@redhat.com>
7765
7766         * include/std/type_traits (is_scoped_enum): Define.
7767         * include/std/version (__cpp_lib_is_scoped_enum): Define.
7768         * testsuite/20_util/is_scoped_enum/value.cc: New test.
7769         * testsuite/20_util/is_scoped_enum/version.cc: New test.
7770
7771 2021-03-16  Jonathan Wakely  <jwakely@redhat.com>
7772
7773         PR libstdc++/99341
7774         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Remove
7775         std::once_flag symbols.
7776         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Likewise.
7777         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Likewise.
7778         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt:
7779         Likewise.
7780         * config/abi/pre/gnu.ver: Likewise.
7781         * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
7782         (struct __once_flag_compat): Remove.
7783         (_ZNSt9once_flag11_M_activateEv): Remove.
7784         (_ZNSt9once_flag9_M_finishEb): Remove.
7785
7786 2021-03-16  Jonathan Wakely  <jwakely@redhat.com>
7787
7788         PR libstdc++/99341
7789         * include/std/mutex [_GLIBCXX_HAVE_LINUX_FUTEX] (once_flag):
7790         Revert to pthread_once_t implementation.
7791         [_GLIBCXX_HAVE_LINUX_FUTEX] (call_once): Likewise.
7792         * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
7793         (struct __once_flag_compat): New type matching the reverted
7794         implementation of once_flag using futexes.
7795         (once_flag::_M_activate): Remove, replace with ...
7796         (_ZNSt9once_flag11_M_activateEv): ... alias symbol.
7797         (once_flag::_M_finish): Remove, replace with ...
7798         (_ZNSt9once_flag9_M_finishEb): ... alias symbol.
7799         * testsuite/30_threads/call_once/66146.cc: Removed.
7800
7801 2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>
7802
7803         * testsuite/17_intro/names.cc: Exclude j from the list
7804         of test symbols for Darwin.
7805
7806 2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>
7807
7808         * config/os/bsd/darwin/ppc-extra.ver: Add matching for
7809         to_chars and from_chars for long double.
7810
7811 2021-03-15  Patrick Palka  <ppalka@redhat.com>
7812
7813         * include/bits/max_size_type.h (__max_size_type::operator _Tp):
7814         Fix formatting.
7815         (__max_size_type::operator++): Define.
7816         (__max_size_type::operator--): Likewise.
7817         (__max_size_type::operator<=>): Conditionally define (in place
7818         of the other comparison operators).
7819         (__max_diff_type::operator _Tp): Fix formatting.
7820         (__max_diff_type::operator++): Define.
7821         (__max_diff_type::operator--): Likewise.
7822         (__max_diff_type::operator<=>): Conditionally define (in place
7823         of the other comparison operators).
7824         * testsuite/std/ranges/iota/max_size_type.cc (test01): Test
7825         these operator overloads.
7826
7827 2021-03-15  Caroline Tice  <cmtice@google.com>
7828
7829         PR libstdc++/99172
7830         * src/Makefile.am (AM_CXXFLAGS_PRE, AM_CXXFLAGS): Add
7831         AM_CXXFLAGS_PRE with the old definition of AM_CXXFLAGS; make
7832         AM_CXXFLAGS to be AM_CXXFLAGS_PRE with '-fvtable-verify=std'
7833         filtered out.
7834         * src/Makefile.in: Regenerate.
7835
7836 2021-03-11  Patrick Palka  <ppalka@redhat.com>
7837
7838         * src/c++17/floating_to_chars.cc: Simplify the file as if
7839         __SIZEOF_INT128__ is always defined.
7840         [!defined __SIZEOF_INT128__]: Include "uint128_t.h".  Define
7841         a base-10 to_chars overload for the uint128_t class type.
7842         * src/c++17/uint128_t.h: New file.
7843         * testsuite/20_util/to_chars/long_double.cc: No longer expect an
7844         execution FAIL on targets that have a large long double type
7845         but lack __int128.
7846
7847 2021-03-11  Patrick Palka  <ppalka@redhat.com>
7848
7849         * src/c++17/ryu/LOCAL_PATCHES: Update.
7850         * src/c++17/ryu/d2s_intrinsics.h: Don't define uint128_t.
7851         * src/c++17/ryu/generic_128.h: Likewise.
7852         * src/c++17/ryu/ryu_generic_128.h (struct floating_decimal_128):
7853         Use uint128_t instead of __uint128_t.
7854         (generic_binary_to_decimal): Likewise.
7855
7856 2021-03-11  Patrick Palka  <ppalka@redhat.com>
7857
7858         * src/c++17/ryu/LOCAL_PATCHES: New file.
7859
7860 2021-03-11  Patrick Palka  <ppalka@redhat.com>
7861
7862         * src/c++17/floating_to_chars.cc (uint128_t): New conditionally
7863         defined alias of unsigned __int128.
7864         (floating_type_traits_binary128::mantissa_t): Use uint128_t
7865         instead of unsigned __int128.
7866         (floating_type_traits<long double>::mantissa_t)
7867         [LONG_DOUBLE_KIND == LDK_IBM128]: Likewise.
7868         (get_ieee_repr): Likewise.  Make casts from uint_t to mantissa_t
7869         and uint32_t explicit.  Simplify the extraction of mantissa,
7870         exponent and sign bit.
7871
7872 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7873
7874         * include/std/barrier (barrier::arrival_token): New move-only
7875         class that encapsulates the underlying token value.
7876
7877 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7878
7879         * python/libstdcxx/v6/printers.py (find_type): Use tag attribute
7880         instead of unqualified() method.
7881
7882 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7883
7884         PR libstdc++/99537
7885         * include/std/stop_token (_Stop_state_t::_M_release_ownership):
7886         Use acq_rel memory ordering.
7887
7888 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7889
7890         PR libstdc++/99533
7891         * src/c++17/fs_dir.cc (recursive_directory_iterator): Use new
7892         helper function to check for permission denied errors.
7893         * src/filesystem/dir.cc (recursive_directory_iterator):
7894         Likewise.
7895         * src/filesystem/dir-common.h (is_permission_denied_error): New
7896         helper function.
7897
7898 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7899
7900         PR libstdc++/99536
7901         * include/bits/random.h (normal_distribution): Use
7902         default-initializer for _M_saved and _M_saved_available.
7903
7904 2021-03-10  John David Anglin  <danglin@gcc.gnu.org>
7905
7906         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Add options to
7907         link with libatomic.
7908         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
7909         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
7910         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
7911         * testsuite/30_threads/barrier/arrive.cc: Likewise.
7912         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
7913         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
7914         * testsuite/30_threads/barrier/completion.cc: Likewise.
7915         * testsuite/30_threads/latch/3.cc: Likewise.
7916         * testsuite/30_threads/semaphore/try_acquire.cc: Likewise.
7917         * testsuite/30_threads/semaphore/try_acquire_for.cc: Likewise.
7918         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
7919
7920 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
7921
7922         PR libstdc++/99413
7923         * include/bits/align.h: Include debug/assertions.h.
7924         * include/bits/codecvt.h: Include bits/c++config.h.
7925         * include/bits/enable_special_members.h: Likewise.
7926         * include/bits/erase_if.h: Likewise.
7927         * include/bits/functional_hash.h: Include <type_traits>.
7928         * include/bits/invoke.h: Include bits/move.h.
7929         * include/bits/ostream_insert.h: Include bits/exception_defines.h.
7930         * include/bits/parse_numbers.h: Include <type_traits>.
7931         * include/bits/predefined_ops.h: Include bits/c++config.h.
7932         * include/bits/range_access.h: Include bits/stl_iterator.h.
7933         * include/bits/stl_bvector.h: Do not include bits/stl_vector.h.
7934         * include/bits/stl_iterator.h: Include bits/stl_iterator_base_types.h.
7935         * include/bits/stl_uninitialized.h: Include bits/stl_algobase.h.
7936         * include/bits/uniform_int_dist.h: Include bits/concept_check.h.
7937         * include/bits/unique_lock.h: Include bits/std_mutex.h.
7938         * include/debug/assertions.h: Include bits/c++config.h.
7939
7940 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
7941
7942         * include/bits/ranges_cmp.h (__eq_builtin_ptr_cmp): Remove.
7943         (ranges::equal_to, ranges::not_equal_to): Do not constrain
7944         with __eq_builtin_ptr_cmp.
7945         (ranges::less, ranges::greater, ranges::less_equal)
7946         (ranges::greater_equal): Do not constrain with
7947         __less_builtin_ptr_cmp.
7948         * libsupc++/compare (compare_three_way): Do not constrain with
7949         __3way_builtin_ptr_cmp.
7950         * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc: Moved to...
7951         * testsuite/18_support/comparisons/object/lwg3530.cc: ...here.
7952         * testsuite/20_util/function_objects/range.cmp/lwg3530.cc: New test.
7953
7954 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
7955
7956         * testsuite/std/time/syn_c++20.cc: Enable synopsis checks for
7957         C++20 calendar types.
7958
7959 2021-03-06  Jakub Jelinek  <jakub@redhat.com>
7960
7961         PR libstdc++/99396
7962         * include/std/bit (__rotl, __rotr): Add optimized variants for power of
7963         two _Nd which the compiler can pattern match the rotates.
7964
7965 2021-03-04  Jonathan Wakely  <jwakely@redhat.com>
7966
7967         PR libstdc++/99382
7968         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
7969         Make storage larger than required. Verify no write to the last
7970         element.
7971         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
7972         Likewise.
7973
7974 2021-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
7975
7976         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
7977         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
7978         Likewise.
7979         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
7980         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
7981         Likewise.
7982
7983 2021-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
7984
7985         * include/experimental/bits/simd.h: Replace reserved _X, _B by
7986         _Xp, _Bp.
7987         * include/experimental/bits/simd_builtin.h: Likewise.
7988         * include/experimental/bits/simd_x86.h: Likewise.
7989
7990 2021-02-27  Jonathan Wakely  <jwakely@redhat.com>
7991
7992         PR libstdc++/99301
7993         * include/std/chrono (year_month_day::_M_days_since_epoch()):
7994         Convert chrono::month and chrono::day to unsigned before
7995         converting to uint32_t.
7996
7997 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
7998
7999         * include/std/chrono (year_month_day::_S_from_days): Perform
8000         all calculations with type uint32_t.
8001
8002 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
8003
8004         * doc/xml/manual/abi.xml: Document versioning for GCC 11.
8005         * doc/html/manual/abi.html: Regenerate.
8006
8007 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
8008
8009         PR libstdc++/99270
8010         * testsuite/27_io/headers/cstdio/types_std.cc: Use pointer to
8011         FILE instead of FILE.
8012
8013 2021-02-25  Andreas Schwab  <schwab@suse.de>
8014
8015         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
8016         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.
8017         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
8018         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
8019
8020 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
8021
8022         PR libstdc++/99265
8023         * include/std/chrono (year_month_day::_S_from_days): Cast long
8024         to int explicitly.
8025
8026 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
8027
8028         * include/std/utility (to_underlying): Define.
8029         * include/std/version (__cpp_lib_to_underlying): Define.
8030         * testsuite/20_util/to_underlying/1.cc: New test.
8031         * testsuite/20_util/to_underlying/version.cc: New test.
8032
8033 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
8034
8035         PR libstdc++/99261
8036         * src/c++17/floating_to_chars.cc (sprintf_ld): Add extra args
8037         before value to be printed.
8038
8039 2021-02-24  Patrick Palka  <ppalka@redhat.com>
8040
8041         * src/c++17/floating_to_chars.cc (__floating_to_chars_precision):
8042         Relax the condition that guards the printf code path to accept
8043         F128_type as well as long double.
8044
8045 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
8046
8047         * include/std/chrono (year_month_day_last:day): New
8048         implementation.
8049
8050 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
8051
8052         * include/std/chrono (year::is_leap): New implementation.
8053         * testsuite/std/time/year/2.cc: New test.
8054
8055 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
8056
8057         * include/std/chrono (year_month_day::_M_days_since_epoch):
8058         New implementation.
8059         * testsuite/std/time/year_month_day/4.cc: New test.
8060
8061 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
8062
8063         * include/std/chrono (year_month_day::_S_from_days): New
8064         implementation.
8065         * testsuite/std/time/year_month_day/3.cc: New test.
8066
8067 2021-02-24  Patrick Palka  <ppalka@redhat.com>
8068
8069         PR libstdc++/98384
8070         * testsuite/20_util/to_chars/long_double.cc: Include <optional>.
8071         (test01): Simplify verifying the nearby values by using a
8072         2-iteration loop and a dedicated output buffer to check that the
8073         nearby values are different.  Factor out the printf-based
8074         verification into a local function, and check that the leading
8075         hex digits agree before comparing to the output of printf.  Also
8076         verify the output by round-tripping it through from_chars.
8077
8078 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
8079
8080         PR libstdc++/98389
8081         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Do not match to_chars
8082         symbols for long double arguments mangled as 'g'.
8083         * config/os/gnu-linux/ldbl-extra.ver: Likewise.
8084         * config/os/gnu-linux/ldbl-ieee128-extra.ver: Likewise.
8085         * src/c++17/Makefile.am [GLIBCXX_LDBL_ALT128_COMPAT_TRUE]:
8086         Use -mabi=ibmlongdouble for floating_to_chars.cc.
8087         * src/c++17/Makefile.in: Regenerate.
8088         * src/c++17/floating_to_chars.cc (floating_type_traits_binary128):
8089         New type defining type traits of IEEE binary128 format.
8090         (floating_type_traits<__float128>): Define specialization.
8091         (floating_type_traits<long double>): Define in terms of
8092         floating_type_traits_binary128 when appropriate.
8093         (floating_to_shortest_scientific): Handle __float128.
8094         (sprintf_ld): New function template for printing a long double
8095         or __ieee128 value using sprintf.
8096         (__floating_to_chars_shortest, __floating_to_chars_precision):
8097         Use sprintf_ld.
8098         (to_chars): Define overloads for __float128.
8099
8100 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
8101
8102         * testsuite/17_intro/names.cc: Undefine 'u' on powerpc*-linux*.
8103
8104 2021-02-23  Martin Sebor  <msebor@redhat.com>
8105
8106         PR c++/99074
8107         * libsupc++/dyncast.cc (__dynamic_cast): Return null when
8108         first argument is null.
8109
8110 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
8111
8112         PR libstdc++/99181
8113         * testsuite/21_strings/char_traits/requirements/char/99181.cc: New
8114         test.
8115
8116 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
8117
8118         PR libstdc++/99181
8119         * include/bits/char_traits.h (char_traits<char>::compare): For
8120         constexpr evaluation don't call
8121         __gnu_cxx::char_traits<char_type>::compare but do the comparison loop
8122         directly.
8123
8124 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
8125
8126         PR libstdc++/97549
8127         * include/pstl/parallel_backend_serial.h: Remove __pstl::__par_backend.
8128
8129 2021-02-23  Patrick Palka  <ppalka@redhat.com>
8130
8131         PR libstdc++/98384
8132         * src/c++17/floating_to_chars.cc (get_ieee_repr): Extract
8133         the high- and low-order parts from an IBM long double value
8134         in an endian-agnostic way.
8135
8136 2021-02-19  Jonathan Wakely  <jwakely@redhat.com>
8137
8138         * include/bits/atomic_wait.h (__thread_relax()): Call
8139         __thread_yield() not __gthread_yield().
8140
8141 2021-02-15  Jonathan Wakely  <jwakely@redhat.com>
8142
8143         * include/bits/atomic_wait.h (__thread_yield()): Check
8144         _GLIBCXX_HAS_GTHREADS before using __gthread_yield.
8145         (__thread_relax()): Use __thread_yield() instead of repeating
8146         the preprocessor checks for __gthread_yield.
8147
8148 2021-02-15  Jonathan Wakely  <jwakely@redhat.com>
8149
8150         * include/std/mutex (once_flag::_M_activate()): Add explicit
8151         return statement for passive case.
8152         (once_flag::_M_finish(bool)): Use reserved name for parameter.
8153
8154 2021-02-14  Jonathan Wakely  <jwakely@redhat.com>
8155
8156         PR libstdc++/99096
8157         * testsuite/util/testsuite_fs.h: Always include <unistd.h>.
8158
8159 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
8160
8161         PR libstdc++/88881
8162         * src/c++17/fs_ops.cc (fs::symlink_status): Re-enable workaround.
8163
8164 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
8165
8166         * doc/xml/manual/status_cxx2014.xml: Document implementation
8167         specific properties of std::experimental::filesystem::rename.
8168         * doc/xml/manual/status_cxx2017.xml: Document implementation
8169         specific properties of std::filesystem::rename.
8170         * doc/html/*: Regenerate.
8171         * src/c++17/fs_ops.cc (fs::rename): Implement correct behaviour
8172         for directories on Windows.
8173         * src/filesystem/ops-common.h (__gnu_posix::rename): Use
8174         MoveFileExW on Windows.
8175         * testsuite/27_io/filesystem/operations/rename.cc: New test.
8176         * testsuite/experimental/filesystem/operations/rename.cc: New test.
8177
8178 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
8179
8180         * testsuite/util/testsuite_fs.h (nonexistent_path): Add
8181         random number to the path.
8182
8183 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
8184
8185         * include/experimental/internet (address_v6::to_string): Include
8186         scope ID in string.
8187         * testsuite/experimental/net/internet/address/v6/members.cc:
8188         Test to_string() results.
8189
8190 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
8191
8192         * include/experimental/internet (address_v6::any): Avoid using
8193         memcpy in constexpr function.
8194         (address_v6::loopback): Likewise.
8195         (make_address_v6): Fix missing return statements on error paths.
8196         * include/experimental/io_context: Avoid -Wdangling-else
8197         warning.
8198         * testsuite/experimental/net/internet/address/v4/members.cc:
8199         Remove unused variables.
8200         * testsuite/experimental/net/internet/address/v6/members.cc:
8201         New test.
8202
8203 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
8204
8205         * include/bits/shared_ptr_base.h (__shared_ptr::_M_get_deleter):
8206         Add unused attribute to parameter.
8207         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq):
8208         Likewise.
8209
8210 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
8211
8212         * testsuite/27_io/basic_ostream/emit/1.cc: Expect test to fail
8213         if -fno-rtti is used.
8214         * testsuite/30_threads/async/forced_unwind.cc: Expect test
8215         to abort if -fno-rtti is used.
8216
8217 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
8218
8219         * testsuite/util/testsuite_allocator.h (memory_resource):
8220         Remove requirement for RTTI and exceptions to be enabled.
8221
8222 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
8223
8224         * testsuite/27_io/basic_istringstream/rdbuf/char/2832.cc: Use
8225         static_cast when RTTI is disabled.
8226         * testsuite/27_io/basic_istringstream/rdbuf/wchar_t/2832.cc:
8227         Likewise.
8228         * testsuite/27_io/basic_ostringstream/rdbuf/char/2832.cc:
8229         Likewise.
8230         * testsuite/27_io/basic_ostringstream/rdbuf/wchar_t/2832.cc:
8231         Likewise.
8232         * testsuite/27_io/basic_stringstream/str/char/2.cc:
8233         Likewise.
8234         * testsuite/27_io/basic_stringstream/str/wchar_t/2.cc:
8235         Likewise.
8236
8237 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
8238
8239         * include/std/ostream (__syncbuf_base::_S_get): Mark parameter
8240         as unused and only use dynamic_cast when RTTI is enabled.
8241
8242 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
8243
8244         PR libstdc++/99077
8245         * src/c++11/cxx11-ios_failure.cc (__ios_failure(const char*, int)):
8246         Change int parameter to error_code, to match std::ios_failure.
8247         (__throw_ios_failure(const char*, int)): Construct error_code
8248         from int parameter.
8249
8250 2021-02-11  Jonathan Wakely  <jwakely@redhat.com>
8251
8252         * libsupc++/eh_ptr.cc (_GLIBCXX_EH_PTR_RELOPS_COMPAT): Define
8253         new macro.
8254         * libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Check new
8255         macro instead of _GLIBCXX_EH_PTR_COMPAT.
8256         (operator==): Likewise.
8257
8258 2021-02-11  Jonathan Wakely  <jwakely@redhat.com>
8259
8260         PR libstdc++/99058
8261         * doc/xml/manual/status_cxx2011.xml: Document when support
8262         became stable.
8263         * doc/xml/manual/status_cxx2014.xml: Likewise.
8264         * doc/xml/manual/status_cxx2017.xml: Likewise.
8265         * doc/html/manual/status.html: Regenerate.
8266
8267 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
8268
8269         PR libstdc++/88881
8270         * src/c++17/fs_ops.cc (fs::status): Re-enable workaround.
8271
8272 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
8273
8274         * src/c++17/fs_ops.cc (fs::create_hard_link, fs::equivalent)
8275         (fs::remove): Use std::system_category() for error codes from
8276         GetLastError().
8277         * src/filesystem/ops.cc (fs::create_hard_link, fs::remove):
8278         Likewise.
8279
8280 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
8281
8282         * testsuite/27_io/filesystem/operations/proximate.cc: Fix typo
8283         in __MINGW32__ macro name.
8284         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
8285         * testsuite/27_io/filesystem/path/generation/proximate.cc:
8286         Likewise.
8287         * testsuite/27_io/filesystem/path/generation/relative.cc:
8288         Likewise.
8289         * testsuite/util/testsuite_fs.h: Likewise.
8290
8291 2021-02-09  François Dumont  <fdumont@gcc.gnu.org>
8292
8293         * include/bits/stl_tree.h
8294         (__has_is_transparent, __has_is_transparent_t): Move...
8295         * include/bits/stl_function.h: ...here.
8296         * include/bits/hashtable_policy.h (_Hash_code_base<>::_M_hash_code_tr): New..
8297         (_Hashtable_base<>::_M_equals_tr): New.
8298         * include/bits/hashtable.h (_Hashtable<>::_M_find_tr, _Hashtable<>::_M_count_tr,
8299         _Hashtable<>::_M_equal_range_tr): New member function templates to perform
8300         heterogeneous lookup.
8301         (_Hashtable<>::_M_find_before_node_tr): New.
8302         (_Hashtable<>::_M_find_node_tr): New.
8303         * include/bits/unordered_map.h (unordered_map::find<>, unordered_map::count<>,
8304         unordered_map::contains<>, unordered_map::equal_range<>): New member function
8305         templates to perform heterogeneous lookup.
8306         (unordered_multimap::find<>, unordered_multimap::count<>,
8307         unordered_multimap::contains<>, unordered_multimap::equal_range<>): Likewise.
8308         * include/bits/unordered_set.h  (unordered_set::find<>, unordered_set::count<>,
8309         unordered_set::contains<>, unordered_set::equal_range<>): Likewise.
8310         (unordered_multiset::find<>, unordered_multiset::count<>,
8311         unordered_multiset::contains<>, unordered_multiset::equal_range<>): Likewise.
8312         * include/debug/unordered_map
8313         (unordered_map::find<>, unordered_map::equal_range<>): Likewise.
8314         (unordered_multimap::find<>, unordered_multimap::equal_range<>): Likewise.
8315         * include/debug/unordered_set
8316         (unordered_set::find<>, unordered_set::equal_range<>): Likewise.
8317         (unordered_multiset::find<>, unordered_multiset::equal_range<>): Likewise.
8318         * testsuite/23_containers/unordered_map/operations/1.cc: New test.
8319         * testsuite/23_containers/unordered_multimap/operations/1.cc: New test.
8320         * testsuite/23_containers/unordered_multiset/operations/1.cc: New test.
8321         * testsuite/23_containers/unordered_set/operations/1.cc: New test.
8322
8323 2021-02-09  François Dumont  <fdumont@gcc.gnu.org>
8324
8325         * include/bits/stl_deque.h
8326         (std::operator-(deque::iterator, deque::iterator)): Replace if/then with
8327         a null pointer test.
8328
8329 2021-02-09  Jonathan Wakely  <jwakely@redhat.com>
8330
8331         * testsuite/27_io/filesystem/operations/remove_all.cc: Remove
8332         test directory after making it writable again.
8333         * testsuite/experimental/filesystem/operations/remove_all.cc:
8334         Likewise.
8335
8336 2021-02-09  Jonathan Wakely  <jwakely@redhat.com>
8337
8338         PR libstdc++/99021
8339         * include/std/coroutine (coroutine_handle<P>::from_address): Add
8340         noexcept.
8341
8342 2021-02-09  Vladimir Vishnevsky  <vv.os.swe@gmail.com>
8343
8344         * include/ext/stdio_sync_filebuf.h: Remove unused <unistd.h>.
8345         * src/c++17/fs_ops.cc (fs::permissions): Qualify mode_t.
8346
8347 2021-02-09  Jakub Jelinek  <jakub@redhat.com>
8348
8349         PR middle-end/98465
8350         * include/bits/basic_string.tcc (basic_string::_M_replace): When __s
8351         points to the characters moved by earlier _S_move, compute the source
8352         address using expression based on the __p pointer rather than __s
8353         pointer.
8354
8355 2021-02-03  Jonathan Wakely  <jwakely@redhat.com>
8356
8357         * testsuite/19_diagnostics/error_code/operators/not_equal.cc:
8358         Add comparison with same category and different values.
8359         * testsuite/19_diagnostics/error_code/operators/less.cc:
8360         Likewise. Fix comparison involving different categories.
8361         * testsuite/19_diagnostics/error_code/operators/three_way.cc:
8362         Likewise.
8363         * testsuite/19_diagnostics/error_condition/operators/less.cc:
8364         Add comment.
8365         * testsuite/19_diagnostics/error_condition/operators/three_way.cc:
8366         Likewise.
8367
8368 2021-02-03  yaozhongxiao  <yaozhongxiao@linux.alibaba.com>
8369
8370         * include/experimental/bits/simd_neon.h: Replace repeated vpadd
8371         calls with a single vaddv for aarch64.
8372
8373 2021-02-03  Matthias Kretz  <kretz@kde.org>
8374
8375         * testsuite/Makefile.am: Warn about the workaround. Add
8376         -fno-tree-vrp to CXXFLAGS passed to the check_simd script.
8377         Improve initial user feedback from make check-simd.
8378         * testsuite/Makefile.in: Regenerated.
8379
8380 2021-02-03  Matthias Kretz  <kretz@kde.org>
8381
8382         * include/experimental/bits/simd.h: Add __detail::_Minimum and
8383         __detail::_Maximum to use them as _BinaryOperation to _S_reduce.
8384         Add hmin and hmax overloads for simd and const_where_expression.
8385         * include/experimental/bits/simd_scalar.h
8386         (_SimdImplScalar::_S_reduce): Make unused _BinaryOperation
8387         parameter const-ref to allow calling _S_reduce with an rvalue.
8388         * testsuite/experimental/simd/tests/reductions.cc: Add tests for
8389         hmin and hmax. Since the compiler statically determined that all
8390         tests pass, repeat the test after a call to make_value_unknown.
8391
8392 2021-02-03  Matthias Kretz  <kretz@kde.org>
8393
8394         * testsuite/experimental/simd/tests/bits/verify.h (verify): Add
8395         instruction pointer data member. Ensure that the `if (m_failed)`
8396         branch is always inlined into the calling code. The body of the
8397         conditional can still be a function call. Move the get_ip call
8398         into the verify ctor to simplify the ctor calls.
8399         (COMPARE): Don't mention the use of all_of for reduction of a
8400         simd_mask. It only distracts from the real issue.
8401
8402 2021-02-03  Matthias Kretz  <kretz@kde.org>
8403
8404         * testsuite/experimental/simd/driver.sh: Abstract reading test
8405         options into read_src_option function. Read skip, only,
8406         expensive, and xfail via read_src_option. Add timeout and
8407         timeout-factor options and adjust timeout variable accordingly.
8408         * testsuite/experimental/simd/tests/loadstore.cc: Set
8409         timeout-factor 2.
8410
8411 2021-02-03  Matthias Kretz  <kretz@kde.org>
8412
8413         * testsuite/experimental/simd/driver.sh: When handling the pipe
8414         to log (and on verbose to stdout) count the lines. If it exceeds
8415         1000 log the issue and exit 125, which is then handled as a
8416         failure.
8417
8418 2021-02-03  Matthias Kretz  <kretz@kde.org>
8419
8420         * testsuite/experimental/simd/tests/hypot3_fma.cc: Add skip:
8421         markup for long double on powerpc64*.
8422
8423 2021-02-03  Matthias Kretz  <kretz@kde.org>
8424
8425         * include/experimental/bits/simd.h: Add __have_power10vec
8426         conditional on _ARCH_PWR10.
8427         * include/experimental/bits/simd_builtin.h: Forward declare
8428         _MaskImplPpc and use it as _MaskImpl when __ALTIVEC__ is
8429         defined.
8430         (_MaskImplBuiltin::_S_some_of): Call _S_popcount from the
8431         _SuperImpl for optimizations and correctness.
8432         * include/experimental/bits/simd_ppc.h: Add _MaskImplPpc.
8433         (_MaskImplPpc::_S_popcount): Implement via vec_cntm for POWER10.
8434         Otherwise, for >=int use -vec_sums divided by a sizeof factor.
8435         For <int use -vec_sums(vec_sum4s(...)) to sum all mask entries.
8436
8437 2021-02-03  Matthias Kretz  <kretz@kde.org>
8438
8439         * testsuite/experimental/simd/driver.sh: Remove executable on
8440         SIGINT. Process compiler and test executable output: In verbose
8441         mode print messages immediately, limited to 1000 lines and
8442         breaking long lines to below $COLUMNS (or 1024 if not set).
8443         Communicating the exit status of the compiler / test with the
8444         necessary pipe is done via a message through stdout/-in.
8445
8446 2021-02-03  Matthias Kretz  <kretz@kde.org>
8447
8448         * testsuite/Makefile.am: Ensure .simd.summary is empty before
8449         collecting a new summary.
8450         * testsuite/Makefile.in: Regenerate.
8451
8452 2021-02-03  Matthias Kretz  <kretz@kde.org>
8453
8454         * testsuite/experimental/simd/generate_makefile.sh: Use
8455         different variables internally than documented for user
8456         overrides. This makes internal append/prepend work as intended.
8457
8458 2021-02-03  Matthias Kretz  <kretz@kde.org>
8459
8460         * testsuite/experimental/simd/driver.sh (verify_test): Print
8461         test output on run xfail. Do not repeat lines from the log that
8462         were already printed on stdout.
8463         (test_selector): Make the compiler flags pattern usable as a
8464         substring selector.
8465         (toplevel): Trap on SIGINT and remove the log and sum files.
8466         Call timout with --foreground to quickly terminate on SIGINT.
8467         * testsuite/experimental/simd/generate_makefile.sh: Simplify run
8468         targets via target patterns. Default DRIVEROPTS to -v for run
8469         targets. Remove log and sum files after completion of the run
8470         target (so that it's always recompiled).
8471         Place help text into text file for reasonable 'make help'
8472         performance.
8473
8474 2021-02-03  Matthias Kretz  <kretz@kde.org>
8475
8476         * include/experimental/bits/simd.h: Remove unnecessary static
8477         assertion. Allow sizeof(8) integer __intrinsic_type to enable
8478         the necessary mask type.
8479
8480 2021-02-03  Matthias Kretz  <kretz@kde.org>
8481
8482         * include/experimental/bits/simd.h: Let __intrinsic_type<long
8483         double, N> be valid if sizeof(long double) == sizeof(double) and
8484         use a __vector double as member type.
8485
8486 2021-02-03  Matthias Kretz  <kretz@kde.org>
8487
8488         * include/experimental/bits/simd.h (__is_intrinsic_type): New
8489         internal type trait. Alias for __is_vector_type on x86.
8490         (_VectorTraitsImpl): Enable for __intrinsic_type in addition for
8491         __vector_type.
8492         (__intrin_bitcast): Allow casting to & from vector & intrinsic
8493         types.
8494         (__intrinsic_type): Explicitly specialize for NEON intrinsic
8495         vector types.
8496
8497 2021-02-03  Matthias Kretz  <kretz@kde.org>
8498
8499         * testsuite/experimental/simd/driver.sh: Implement skip, only,
8500         expensive, and xfail markers. They can select on type, ABI tag
8501         subset number, target-triplet, and compiler flags.
8502         * testsuite/experimental/simd/generate_makefile.sh: The summary
8503         now includes lines for unexpected passes and expected failures.
8504         If the skip or only markers are only conditional on the type, do
8505         not generate rules for those types.
8506         * testsuite/experimental/simd/tests/abs.cc: Mark test expensive
8507         for ABI tag subsets 1-9.
8508         * testsuite/experimental/simd/tests/algorithms.cc: Ditto.
8509         * testsuite/experimental/simd/tests/broadcast.cc: Ditto.
8510         * testsuite/experimental/simd/tests/casts.cc: Ditto.
8511         * testsuite/experimental/simd/tests/generator.cc: Ditto.
8512         * testsuite/experimental/simd/tests/integer_operators.cc: Ditto.
8513         * testsuite/experimental/simd/tests/loadstore.cc: Ditto.
8514         * testsuite/experimental/simd/tests/mask_broadcast.cc: Ditto.
8515         * testsuite/experimental/simd/tests/mask_conversions.cc: Ditto.
8516         * testsuite/experimental/simd/tests/mask_implicit_cvt.cc: Ditto.
8517         * testsuite/experimental/simd/tests/mask_loadstore.cc: Ditto.
8518         * testsuite/experimental/simd/tests/mask_operator_cvt.cc: Ditto.
8519         * testsuite/experimental/simd/tests/mask_operators.cc: Ditto.
8520         * testsuite/experimental/simd/tests/mask_reductions.cc: Ditto.
8521         * testsuite/experimental/simd/tests/operator_cvt.cc: Ditto.
8522         * testsuite/experimental/simd/tests/operators.cc: Ditto.
8523         * testsuite/experimental/simd/tests/reductions.cc: Ditto.
8524         * testsuite/experimental/simd/tests/simd.cc: Ditto.
8525         * testsuite/experimental/simd/tests/split_concat.cc: Ditto.
8526         * testsuite/experimental/simd/tests/splits.cc: Ditto.
8527         * testsuite/experimental/simd/tests/where.cc: Ditto.
8528         * testsuite/experimental/simd/tests/fpclassify.cc: Ditto. In
8529         addition replace "test only floattypes" marker by unconditional
8530         "float|double|ldouble" only marker.
8531         * testsuite/experimental/simd/tests/frexp.cc: Ditto.
8532         * testsuite/experimental/simd/tests/hypot3_fma.cc: Ditto.
8533         * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
8534         Ditto.
8535         * testsuite/experimental/simd/tests/logarithm.cc: Ditto.
8536         * testsuite/experimental/simd/tests/math_1arg.cc: Ditto.
8537         * testsuite/experimental/simd/tests/math_2arg.cc: Ditto.
8538         * testsuite/experimental/simd/tests/remqo.cc: Ditto.
8539         * testsuite/experimental/simd/tests/trigonometric.cc: Ditto.
8540         * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: Ditto.
8541         * testsuite/experimental/simd/tests/sincos.cc: Ditto. In
8542         addition, xfail on run because the reference data is missing.
8543
8544 2021-02-02  Jonathan Wakely  <jwakely@redhat.com>
8545
8546         * doc/xml/manual/status_cxx2011.xml: Remove stray table cell.
8547         * doc/xml/manual/status_cxx2014.xml: Likewise.
8548         * doc/xml/manual/status_cxx2017.xml: Likewise.
8549         * doc/html/manual/status.html: Regenerate.
8550
8551 2021-02-01  François Dumont  <fdumont@gcc.gnu.org>
8552
8553         PR libstdc++/70303
8554         * include/bits/stl_deque.h (std::deque<>::operator-(iterator, iterator)):
8555         Return 0 if both iterators are value-initialized.
8556         * testsuite/23_containers/deque/70303.cc: New test.
8557         * testsuite/23_containers/vector/70303.cc: New test.
8558
8559 2021-02-01  Jonathan Wakely  <jwakely@redhat.com>
8560
8561         * doc/xml/manual/status_cxx2011.xml: Update std::call_once
8562         status.
8563         * doc/xml/manual/status_cxx2014.xml: Likewise.
8564         * doc/xml/manual/status_cxx2017.xml: Likewise. Update
8565         std::from_chars and std::to_chars status. Fix formatting.
8566         * doc/html/manual/status.html: Regenerate.
8567
8568 2021-01-28  Jonathan Wakely  <jwakely@redhat.com>
8569
8570         * include/experimental/bits/numeric_traits.h: Update copyright
8571         dates.
8572         * include/experimental/bits/simd.h: Likewise.
8573         * include/experimental/bits/simd_builtin.h: Likewise.
8574         * include/experimental/bits/simd_converter.h: Likewise.
8575         * include/experimental/bits/simd_detail.h: Likewise.
8576         * include/experimental/bits/simd_fixed_size.h: Likewise.
8577         * include/experimental/bits/simd_math.h: Likewise.
8578         * include/experimental/bits/simd_neon.h: Likewise.
8579         * include/experimental/bits/simd_ppc.h: Likewise.
8580         * include/experimental/bits/simd_scalar.h: Likewise.
8581         * include/experimental/bits/simd_x86.h: Likewise.
8582         * include/experimental/bits/simd_x86_conversions.h: Likewise.
8583         * include/experimental/simd: Likewise.
8584         * testsuite/experimental/simd/*: Likewise.
8585
8586 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
8587
8588         * doc/xml/manual/status_cxx2017.xml: Replace invalid entity.
8589         * doc/html/*: Regenerate.
8590
8591 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
8592
8593         * testsuite/experimental/simd/generate_makefile.sh: Use printf
8594         instead of echo when printing escape characters.
8595
8596 2021-01-27  Matthias Kretz  <kretz@kde.org>
8597
8598         * scripts/check_simd: New file. This script is called from the
8599         the check-simd target. It determines a set of compiler flags and
8600         simulator setups for calling generate_makefile.sh and passes the
8601         information back to the check-simd target, which recurses to the
8602         generated Makefiles.
8603         * scripts/create_testsuite_files: Remove files below simd/tests/
8604         from testsuite_files and place them in testsuite_files_simd.
8605         * testsuite/Makefile.am: Add testsuite_files_simd. Add
8606         check-simd target.
8607         * testsuite/Makefile.in: Regenerate.
8608         * testsuite/experimental/simd/driver.sh: New file. This script
8609         compiles and runs a given simd test, logging its output and
8610         status. It uses the timeout command to implement compile and
8611         test timeouts.
8612         * testsuite/experimental/simd/generate_makefile.sh: New file.
8613         This script generates a Makefile which uses driver.sh to compile
8614         and run the tests and collect the logs into a single log file.
8615         * testsuite/experimental/simd/tests/abs.cc: New file. Tests
8616         abs(simd).
8617         * testsuite/experimental/simd/tests/algorithms.cc: New file.
8618         Tests min/max(simd, simd).
8619         * testsuite/experimental/simd/tests/bits/conversions.h: New
8620         file. Contains functions to support tests involving conversions.
8621         * testsuite/experimental/simd/tests/bits/make_vec.h: New file.
8622         Support functions make_mask and make_vec.
8623         * testsuite/experimental/simd/tests/bits/mathreference.h: New
8624         file. Support functions to supply precomputed math function
8625         reference data.
8626         * testsuite/experimental/simd/tests/bits/metahelpers.h: New
8627         file. Support code for SFINAE testing.
8628         * testsuite/experimental/simd/tests/bits/simd_view.h: New file.
8629         * testsuite/experimental/simd/tests/bits/test_values.h: New
8630         file. Test functions to easily drive a test with simd objects
8631         initialized from a given list of values and a range of random
8632         values.
8633         * testsuite/experimental/simd/tests/bits/ulp.h: New file.
8634         Support code to determine the ULP distance of simd objects.
8635         * testsuite/experimental/simd/tests/bits/verify.h: New file.
8636         Test framework for COMPARE'ing simd objects and instantiating
8637         the test templates with value_type and ABI tag.
8638         * testsuite/experimental/simd/tests/broadcast.cc: New file. Test
8639         simd broadcasts.
8640         * testsuite/experimental/simd/tests/casts.cc: New file. Test
8641         simd casts.
8642         * testsuite/experimental/simd/tests/fpclassify.cc: New file.
8643         Test floating-point classification functions.
8644         * testsuite/experimental/simd/tests/frexp.cc: New file. Test
8645         frexp(simd).
8646         * testsuite/experimental/simd/tests/generator.cc: New file. Test
8647         simd generator constructor.
8648         * testsuite/experimental/simd/tests/hypot3_fma.cc: New file.
8649         Test 3-arg hypot(simd,simd,simd) and fma(simd,simd,sim).
8650         * testsuite/experimental/simd/tests/integer_operators.cc: New
8651         file. Test integer operators.
8652         * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
8653         New file. Test ldexp(simd), scalbn(simd), scalbln(simd), and
8654         modf(simd).
8655         * testsuite/experimental/simd/tests/loadstore.cc: New file. Test
8656         (converting) simd loads and stores.
8657         * testsuite/experimental/simd/tests/logarithm.cc: New file. Test
8658         log*(simd).
8659         * testsuite/experimental/simd/tests/mask_broadcast.cc: New file.
8660         Test simd_mask broadcasts.
8661         * testsuite/experimental/simd/tests/mask_conversions.cc: New
8662         file. Test simd_mask conversions.
8663         * testsuite/experimental/simd/tests/mask_implicit_cvt.cc: New
8664         file. Test simd_mask implicit conversions.
8665         * testsuite/experimental/simd/tests/mask_loadstore.cc: New file.
8666         Test simd_mask loads and stores.
8667         * testsuite/experimental/simd/tests/mask_operator_cvt.cc: New
8668         file. Test simd_mask operators convert as specified.
8669         * testsuite/experimental/simd/tests/mask_operators.cc: New file.
8670         Test simd_mask compares, subscripts, and negation.
8671         * testsuite/experimental/simd/tests/mask_reductions.cc: New
8672         file. Test simd_mask reductions.
8673         * testsuite/experimental/simd/tests/math_1arg.cc: New file. Test
8674         1-arg math functions on simd.
8675         * testsuite/experimental/simd/tests/math_2arg.cc: New file. Test
8676         2-arg math functions on simd.
8677         * testsuite/experimental/simd/tests/operator_cvt.cc: New file.
8678         Test implicit conversions on simd binary operators behave as
8679         specified.
8680         * testsuite/experimental/simd/tests/operators.cc: New file. Test
8681         simd compares, subscripts, not, unary minus, plus, minus,
8682         multiplies, divides, increment, and decrement.
8683         * testsuite/experimental/simd/tests/reductions.cc: New file.
8684         Test reduce(simd).
8685         * testsuite/experimental/simd/tests/remqo.cc: New file. Test
8686         remqo(simd).
8687         * testsuite/experimental/simd/tests/simd.cc: New file. Basic
8688         sanity checks of simd types.
8689         * testsuite/experimental/simd/tests/sincos.cc: New file. Test
8690         sin(simd) and cos(simd).
8691         * testsuite/experimental/simd/tests/split_concat.cc: New file.
8692         Test split(simd) and concat(simd, simd).
8693         * testsuite/experimental/simd/tests/splits.cc: New file. Test
8694         split(simd_mask).
8695         * testsuite/experimental/simd/tests/trigonometric.cc: New file.
8696         Test remaining trigonometric functions on simd.
8697         * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: New
8698         file. Test trunc(simd), ceil(simd), and floor(simd).
8699         * testsuite/experimental/simd/tests/where.cc: New file. Test
8700         masked operations using where.
8701
8702 2021-01-27  Matthias Kretz  <kretz@kde.org>
8703
8704         * doc/xml/manual/status_cxx2017.xml: Add implementation status
8705         of the Parallelism TS 2. Document implementation-defined types
8706         and behavior.
8707         * include/Makefile.am: Add new headers.
8708         * include/Makefile.in: Regenerate.
8709         * include/experimental/simd: New file. New header for
8710         Parallelism TS 2.
8711         * include/experimental/bits/numeric_traits.h: New file.
8712         Implementation of P1841R1 using internal naming. Addition of
8713         missing IEC559 functionality query.
8714         * include/experimental/bits/simd.h: New file. Definition of the
8715         public simd interfaces and general implementation helpers.
8716         * include/experimental/bits/simd_builtin.h: New file.
8717         Implementation of the _VecBuiltin simd_abi.
8718         * include/experimental/bits/simd_converter.h: New file. Generic
8719         simd conversions.
8720         * include/experimental/bits/simd_detail.h: New file. Internal
8721         macros for the simd implementation.
8722         * include/experimental/bits/simd_fixed_size.h: New file. Simd
8723         fixed_size ABI specific implementations.
8724         * include/experimental/bits/simd_math.h: New file. Math
8725         overloads for simd.
8726         * include/experimental/bits/simd_neon.h: New file. Simd NEON
8727         specific implementations.
8728         * include/experimental/bits/simd_ppc.h: New file. Implement bit
8729         shifts to avoid invalid results for integral types smaller than
8730         int.
8731         * include/experimental/bits/simd_scalar.h: New file. Simd scalar
8732         ABI specific implementations.
8733         * include/experimental/bits/simd_x86.h: New file. Simd x86
8734         specific implementations.
8735         * include/experimental/bits/simd_x86_conversions.h: New file.
8736         x86 specific conversion optimizations. The conversion patterns
8737         work around missing conversion patterns in the compiler and
8738         should be removed as soon as PR85048 is resolved.
8739         * testsuite/experimental/simd/standard_abi_usable.cc: New file.
8740         Test that all (not all fixed_size<N>, though) standard simd and
8741         simd_mask types are usable.
8742         * testsuite/experimental/simd/standard_abi_usable_2.cc: New
8743         file. As above but with -ffast-math.
8744         * testsuite/libstdc++-dg/conformance.exp: Don't build simd tests
8745         from the standard test loop. Instead use
8746         check_vect_support_and_set_flags to build simd tests with the
8747         relevant machine flags.
8748
8749 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
8750
8751         PR libstdc++/66414
8752         * include/bits/string_view.tcc
8753         (basic_string_view::find(const CharT*, size_type, size_type)):
8754         Optimize.
8755
8756 2021-01-27  Paul Fee  <paul.f.fee@gmail.com>
8757
8758         * include/bits/basic_string.h (basic_string::contains): New
8759         member functions.
8760         * include/std/string_view (basic_string_view::contains):
8761         Likewise.
8762         * include/std/version (__cpp_lib_string_contains): Define.
8763         * testsuite/21_strings/basic_string/operations/starts_with/char/1.cc:
8764         Remove trailing whitespace.
8765         * testsuite/21_strings/basic_string/operations/starts_with/wchar_t/1.cc:
8766         Likewise.
8767         * testsuite/21_strings/basic_string/operations/contains/char/1.cc: New test.
8768         * testsuite/21_strings/basic_string/operations/contains/wchar_t/1.cc: New test.
8769         * testsuite/21_strings/basic_string_view/operations/contains/char/1.cc: New test.
8770         * testsuite/21_strings/basic_string_view/operations/contains/char/2.cc: New test.
8771         * testsuite/21_strings/basic_string_view/operations/contains/wchar_t/1.cc: New test.
8772
8773 2021-01-21  Jonathan Wakely  <jwakely@redhat.com>
8774
8775         * src/c++17/Makefile.in: Regenerate.
8776
8777 2021-01-20  David Edelsohn  <dje.gcc@gmail.com>
8778
8779         * config/os/aix/ctype_inline.h (bool ctype<char>:: is): Cast
8780         _OBJ_DATA subscript to unsigned char. Add _THREAD_SAFE access to
8781         __lc_type.
8782         (const char* ctype<char>:: is): Same.
8783
8784 2021-01-18  Jonathan Wakely  <jwakely@redhat.com>
8785
8786         PR libstdc++/98725
8787         * testsuite/20_util/unique_ptr/io/lwg2948.cc:  Do not try to
8788         write to a wide character stream if wide character support is
8789         disabled in the library.
8790
8791 2021-01-18  Jonathan Wakely  <jwakely@redhat.com>
8792
8793         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Use
8794         stringbuf not wstringbuf.
8795
8796 2021-01-18  Jakub Jelinek  <jakub@redhat.com>
8797
8798         PR debug/98708
8799         * src/c++11/Makefile.am (cxx11-ios_failure-lt.s, cxx11-ios_failure.s):
8800         Compile with -gno-as-loc-support.
8801         * src/c++11/Makefile.in: Regenerated.
8802
8803 2021-01-16  H.J. Lu  <hjl.tools@gmail.com>
8804
8805         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc:
8806         Add -fcf-protection=none to -march=i486.
8807
8808 2021-01-14  François Dumont  <fdumont@gcc.gnu.org>
8809
8810         * testsuite/23_containers/deque/debug/98466.cc: Make it pre-C++11
8811         compliant.
8812
8813 2021-01-14  Alexandre Oliva  <oliva@adacore.com>
8814
8815         * testsuite/30_threads/future/members/poll.cc: Calibrate
8816         iteration count.
8817
8818 2021-01-14  François Dumont  <fdumont@gcc.gnu.org>
8819
8820         PR libstdc++/98466
8821         * include/bits/hashtable_policy.h (_Node_iterator_base()): Set _M_cur to nullptr.
8822         (_Node_iterator()): Make default.
8823         (_Node_const_iterator()): Make default.
8824         * include/debug/macros.h (__glibcxx_check_erae_range_after): Add _M_singular
8825         iterator checks.
8826         * include/debug/safe_iterator.h
8827         (_GLIBCXX_DEBUG_VERIFY_OPERANDS): Accept if both iterator are value initialized.
8828         * include/debug/safe_local_iterator.h (_GLIBCXX_DEBUG_VERIFY_OPERANDS):
8829         Likewise.
8830         * include/debug/safe_iterator.tcc (_Safe_iterator<>::_M_valid_range): Add
8831         _M_singular checks on input iterators.
8832         * src/c++11/debug.cc (_Safe_iterator_base::_M_can_compare): Remove _M_singular
8833         checks.
8834         * testsuite/23_containers/deque/debug/98466.cc: New test.
8835         * testsuite/23_containers/unordered_map/debug/98466.cc: New test.
8836
8837 2021-01-14  Jonathan Wakely  <jwakely@redhat.com>
8838
8839         PR libstdc++/98471
8840         * include/bits/fs_path.h (__throw_conversion_error): New
8841         function to throw or abort on character conversion errors.
8842         (__wstr_from_utf8): Move definition after filesystem_error has
8843         been defined. Use __throw_conversion_error.
8844         (path::_S_convert<_EcharT>): Use __throw_conversion_error.
8845         (path::_S_str_convert<_CharT, _Traits, _Allocator>): Likewise.
8846         (path::u8string): Likewise.
8847
8848 2021-01-14  Jonathan Wakely  <jwakely@redhat.com>
8849
8850         * include/std/barrier: Update copyright years. Fix whitespace.
8851         * include/std/version: Fix whitespace.
8852         * testsuite/30_threads/barrier/1.cc: Update copyright years.
8853         * testsuite/30_threads/barrier/2.cc: Likewise.
8854         * testsuite/30_threads/barrier/arrive.cc: Likewise.
8855         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
8856         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
8857         * testsuite/30_threads/barrier/completion.cc: Likewise.
8858
8859 2021-01-13  Jonathan Wakely  <jwakely@redhat.com>
8860
8861         * doc/doxygen/user.cfg.in (INPUT): Remove include/debug/array.
8862
8863 2021-01-10  David Edelsohn  <dje.gcc@gmail.com>
8864
8865         PR libstdc++/98613
8866         * testsuite/ext/vstring/cons/moveable.cc: Suppress false positive
8867         warning.
8868         * testsuite/ext/vstring/modifiers/assign/move_assign.cc: Same.
8869
8870 2021-01-08  Olivier Hainque  <hainque@adacore.com>
8871
8872         * testsuite/20_util/bind/ref_neg.cc: Tweak the
8873         dg-prune-output regex for out-of-build-tree contexts.
8874
8875 2021-01-07  Thomas Rodgers  <trodgers@redhat.com>
8876
8877         * doc/doxygen/user.cfg.in: Add new header.
8878         * include/Makefile.am (std_headers): likewise.
8879         * include/Makefile.in: Regenerate.
8880         * include/precompiled/stdc++.h: Add new header.
8881         * include/std/barrier: New file.
8882         * include/std/version: Add __cpp_lib_barrier feature test macro.
8883         * testsuite/30_threads/barrier/1.cc: New test.
8884         * testsuite/30_threads/barrier/2.cc: Likewise.
8885         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
8886         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
8887         * testsuite/30_threads/barrier/arrive.cc: Likewise.
8888         * testsuite/30_threads/barrier/completion.cc: Likewise.
8889
8890 2021-01-07  Patrick Palka  <ppalka@redhat.com>
8891
8892         PR libstdc++/98384
8893         * testsuite/20_util/to_chars/long_double.cc: Use nexttowardl
8894         instead of the non-standard nextupl and nextdownl.
8895
8896 2021-01-05  Samuel Thibault  <samuel.thibault@ens-lyon.org>
8897
8898         * configure: Re-generate.
8899
8900 2021-01-05  Ed Smith-Rowland  <3dw4rd@verizon.net>
8901
8902         * include/precompiled/stdc++.h: Add <source_location> to C++20 section.
8903
8904 2021-01-01  Jakub Jelinek  <jakub@redhat.com>
8905
8906         * ChangeLog-2020: Rotate ChangeLog.  New file.
8907
8908 \f
8909 Copyright (C) 2021 Free Software Foundation, Inc.
8910
8911 Copying and distribution of this file, with or without modification,
8912 are permitted in any medium without royalty provided the copyright
8913 notice and this notice are preserved.