libstdc++-v3/ChangeLog

   1 2022-09-28  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * doc/xml/manual/evolution.xml: Document std::bind API
   4         changes.
   5         * doc/xml/manual/intro.xml: Document LWG 2487 status.
   6         * doc/xml/manual/using.xml: Clarify default value of
   7         _GLIBCXX_USE_DEPRECATED.
   8         * doc/html/*: Regenerate.
   9         * include/std/functional (_Bind::operator()(Args&&...) volatile)
  10         (_Bind::operator()(Args&&...) const volatile)
  11         (_Bind_result::operator()(Args&&...) volatile)
  12         (_Bind_result::operator()(Args&&...) const volatile): Replace
  13         with deleted overload for C++20 and later.
  14         * testsuite/20_util/bind/cv_quals.cc: Check for deprecated
  15         warnings in C++17.
  16         * testsuite/20_util/bind/cv_quals_2.cc: Likewise, and check for
  17         ill-formed in C++20.
  18
  19 2022-09-28  Jonathan Wakely  <jwakely@redhat.com>
  20
  21         PR libstdc++/70692
  22         * include/bits/invoke.h [__cplusplus < 201703] (__invoke_r):
  23         Remove is_invocable and is_convertible constraints.
  24         * include/std/type_traits (__is_invocable_impl::_S_conv): Use
  25         non-deduced context for parameter.
  26         (__is_invocable_impl::_S_test): Remove _Check_noex template
  27         parameter and use deduced noexcept value in its place. Add bool
  28         parameter to detect dangling references.
  29         (__is_invocable_impl::type): Adjust call to _S_test to avoid
  30         deducing unnecessary noexcept property..
  31         (__is_invocable_impl::__nothrow_type): Rename to ...
  32         (__is_invocable_impl::__nothrow_conv): ... this. Adjust call
  33         to _S_test to deduce noexcept property.
  34         * testsuite/20_util/bind/dangling_ref.cc: New test.
  35         * testsuite/20_util/function/cons/70692.cc: New test.
  36         * testsuite/20_util/function_objects/invoke/dangling_ref.cc:
  37         New test.
  38         * testsuite/20_util/is_invocable/dangling_ref.cc: New test.
  39         * testsuite/30_threads/packaged_task/cons/dangling_ref.cc:
  40         New test.
  41
  42 2022-09-27  Jonathan Wakely  <jwakely@redhat.com>
  43
  44         PR c++/107049
  45         * testsuite/20_util/is_convertible/requirements/access.cc: New
  46         test.
  47
  48 2022-09-27  Jonathan Wakely  <jwakely@redhat.com>
  49
  50         PR c++/106651
  51         * include/bits/std_function.h (__function_guide_t): New alias
  52         template.
  53         [__cpp_static_call_operator] (__function_guide_static_helper):
  54         New class template.
  55         (function): Use __function_guide_t in deduction guide.
  56         * include/std/future (packaged_task): Use __function_guide_t in
  57         deduction guide.
  58         * testsuite/20_util/function/cons/deduction_c++23.cc: New test.
  59         * testsuite/30_threads/packaged_task/cons/deduction_c++23.cc:
  60         New test.
  61
  62 2022-09-26  Jonathan Wakely  <jwakely@redhat.com>
  63
  64         * include/bits/ptr_traits.h (__ptr_traits_elem) [__cpp_concepts]:
  65         Also define the __ptr_traits_elem class template for the
  66         concepts case.
  67         (pointer_traits<Ptr>): Remove constrained partial
  68         specialization.
  69         * testsuite/20_util/pointer_traits/lwg3545.cc: Check for
  70         ambiguitiy with program-defined partial specialization.
  71
  72 2022-09-26  Jonathan Wakely  <jwakely@redhat.com>
  73
  74         * include/std/type_traits (is_convertible, is_convertible_v):
  75         Define using new built-in.
  76         (is_nothrow_convertible is_nothrow_convertible_v): Likewise.
  77
  78 2022-09-26  Jonathan Wakely  <jwakely@redhat.com>
  79
  80         PR libstdc++/107037
  81         * include/std/bitset (_Base_bitset::_M_do_reset): Use
  82         preprocessor conditional around non-C++03 code.
  83         * testsuite/20_util/bitset/107037.cc: New test.
  84
  85 2022-09-24  Jonathan Wakely  <jwakely@redhat.com>
  86
  87         * include/bits/alloc_traits.h (allocator_traits::is_always_equal):
  88         Only instantiate is_empty if needed.
  89         * include/bits/ptr_traits.h (__ptr_traits_impl::difference_type)
  90         (__ptr_traits_impl::rebind): Use __detected_or.
  91         * include/experimental/type_traits (is_same_v): Add a partial
  92         specialization instead of instantiating the std::is_same class
  93         template.
  94         (detected_t): Redefine in terms of detected_or_t.
  95         (is_detected, is_detected_v): Redefine in terms of detected_t.
  96         * include/std/type_traits [__cpp_concepts] (__detected_or): Add
  97         new definition using concepts.
  98         (__detector::value_t): Rename to __is_detected.
  99         * testsuite/17_intro/names.cc: Check value_t isn't used.
 100
 101 2022-09-23  Jonathan Wakely  <jwakely@redhat.com>
 102
 103         * testsuite/20_util/is_assignable/requirements/access.cc:
 104         New test.
 105
 106 2022-09-23  Jonathan Wakely  <jwakely@redhat.com>
 107
 108         PR libstdc++/91456
 109         * include/std/type_traits (__is_nothrow_invocable_lib): Remove.
 110         (__is_invocable_impl::__nothrow_type): New member type which
 111         checks if the conversion can throw.
 112         (__is_nt_invocable_impl): Replace class template with alias
 113         template to __is_nt_invocable_impl::__nothrow_type.
 114         * testsuite/20_util/is_nothrow_invocable/91456.cc: New test.
 115         * testsuite/20_util/is_nothrow_convertible/value.cc: Remove
 116         macro used by value_ext.cc test.
 117         * testsuite/20_util/is_nothrow_convertible/value_ext.cc: Remove
 118         test for non-standard __is_nothrow_invocable_lib trait.
 119
 120 2022-09-23  Marek Polacek  <polacek@redhat.com>
 121
 122         PR c++/106784
 123         * include/std/type_traits: Rename __is_nothrow_convertible to
 124         __is_nothrow_convertible_lib.
 125         * testsuite/20_util/is_nothrow_convertible/value_ext.cc: Likewise.
 126
 127 2022-09-23  Jonathan Wakely  <jwakely@redhat.com>
 128
 129         * include/std/bitset (operator>>): Do not copy for N==0.
 130         * testsuite/20_util/bitset/io/input.cc: Add comment.
 131
 132 2022-09-23  Jonathan Wakely  <jwakely@redhat.com>
 133
 134         * include/debug/bitset (__debug::bitset): Add constexpr to all
 135         member functions.
 136         (operator&, operator|, operator^): Add inline and constexpr.
 137         (operator>>, operator<<): Add inline.
 138         * testsuite/20_util/bitset/access/constexpr.cc: Only check using
 139         constexpr std::string for the cxx11 ABI.
 140         * testsuite/20_util/bitset/cons/constexpr_c++23.cc: Likewise.
 141         * testsuite/20_util/headers/bitset/synopsis.cc: Check constexpr
 142         for C++23.
 143
 144 2022-09-23  Jonathan Wakely  <jwakely@redhat.com>
 145
 146         * include/std/bitset (bitset::_M_copy_to_string): Find set bits
 147         instead of iterating over individual bits.
 148
 149 2022-09-22  Jonathan Wakely  <jwakely@redhat.com>
 150
 151         * include/std/bitset (bitset): Add constexpr for C++23. Guard
 152         members using std::string with _GLIBCXX_HOSTED.
 153         * include/std/version (__cpp_lib_constexpr_bitset): Define.
 154         * testsuite/20_util/bitset/access/constexpr.cc: New test.
 155         * testsuite/20_util/bitset/cons/constexpr_c++23.cc: New test.
 156         * testsuite/20_util/bitset/count/constexpr.cc: New test.
 157         * testsuite/20_util/bitset/ext/constexpr.cc: New test.
 158         * testsuite/20_util/bitset/operations/constexpr_c++23.cc: New test.
 159         * testsuite/20_util/bitset/version.cc: New test.
 160
 161 2022-09-22  Jonathan Wakely  <jwakely@redhat.com>
 162
 163         * testsuite/23_containers/bitset/18604.cc: Moved to...
 164         * testsuite/20_util/bitset/18604.cc: ...here.
 165         * testsuite/23_containers/bitset/45713.cc: Moved to...
 166         * testsuite/20_util/bitset/45713.cc: ...here.
 167         * testsuite/23_containers/bitset/to_string/dr396.cc: Moved to...
 168         * testsuite/20_util/bitset/access/dr396.cc: ...here.
 169         * testsuite/23_containers/bitset/to_string/1.cc: Moved to...
 170         * testsuite/20_util/bitset/access/to_string.cc: ...here.
 171         * testsuite/23_containers/bitset/to_ullong/1.cc: Moved to...
 172         * testsuite/20_util/bitset/access/to_ullong.cc: ...here.
 173         * testsuite/23_containers/bitset/to_ulong/1.cc: Moved to...
 174         * testsuite/20_util/bitset/access/to_ulong.cc: ...here.
 175         * testsuite/23_containers/bitset/cons/1.cc: Moved to...
 176         * testsuite/20_util/bitset/cons/1.cc: ...here.
 177         * testsuite/23_containers/bitset/cons/16020.cc: Moved to...
 178         * testsuite/20_util/bitset/cons/16020.cc: ...here.
 179         * testsuite/23_containers/bitset/cons/2.cc: Moved to...
 180         * testsuite/20_util/bitset/cons/2.cc: ...here.
 181         * testsuite/23_containers/bitset/cons/3.cc: Moved to...
 182         * testsuite/20_util/bitset/cons/3.cc: ...here.
 183         * testsuite/23_containers/bitset/cons/38244.cc: Moved to...
 184         * testsuite/20_util/bitset/cons/38244.cc: ...here.
 185         * testsuite/23_containers/bitset/cons/50268.cc: Moved to...
 186         * testsuite/20_util/bitset/cons/50268.cc: ...here.
 187         * testsuite/23_containers/bitset/cons/6282.cc: Moved to...
 188         * testsuite/20_util/bitset/cons/6282.cc: ...here.
 189         * testsuite/23_containers/bitset/cons/constexpr.cc: Moved to...
 190         * testsuite/20_util/bitset/cons/constexpr.cc: ...here.
 191         * testsuite/23_containers/bitset/cons/dr1325-1.cc: Moved to...
 192         * testsuite/20_util/bitset/cons/dr1325-1.cc: ...here.
 193         * testsuite/23_containers/bitset/cons/dr1325-2.cc: Moved to...
 194         * testsuite/20_util/bitset/cons/dr1325-2.cc: ...here.
 195         * testsuite/23_containers/bitset/cons/dr396.cc: Moved to...
 196         * testsuite/20_util/bitset/cons/dr396.cc: ...here.
 197         * testsuite/23_containers/bitset/debug/invalidation/1.cc: Moved to...
 198         * testsuite/20_util/bitset/debug/invalidation/1.cc: ...here.
 199         * testsuite/23_containers/bitset/ext/15361.cc: Moved to...
 200         * testsuite/20_util/bitset/ext/15361.cc: ...here.
 201         * testsuite/23_containers/bitset/hash/1.cc: Moved to...
 202         * testsuite/20_util/bitset/hash/1.cc: ...here.
 203         * testsuite/23_containers/bitset/input/1.cc: Moved to...
 204         * testsuite/20_util/bitset/io/input.cc: ...here.
 205         * testsuite/23_containers/bitset/count/6124.cc: Moved to...
 206         * testsuite/20_util/bitset/observers/6124.cc: ...here.
 207         * testsuite/23_containers/bitset/all/1.cc: Moved to...
 208         * testsuite/20_util/bitset/observers/all.cc: ...here.
 209         * testsuite/23_containers/bitset/test/1.cc: Moved to...
 210         * testsuite/20_util/bitset/observers/test.cc: ...here.
 211         * testsuite/23_containers/bitset/operations/1.cc: Moved to...
 212         * testsuite/20_util/bitset/operations/1.cc: ...here.
 213         * testsuite/23_containers/bitset/operations/13838.cc: Moved to...
 214         * testsuite/20_util/bitset/operations/13838.cc: ...here.
 215         * testsuite/23_containers/bitset/operations/2.cc: Moved to...
 216         * testsuite/20_util/bitset/operations/2.cc: ...here.
 217         * testsuite/23_containers/bitset/operations/96303.cc: Moved to...
 218         * testsuite/20_util/bitset/operations/96303.cc: ...here.
 219         * testsuite/23_containers/bitset/operations/constexpr-2.cc: Moved to...
 220         * testsuite/20_util/bitset/operations/constexpr-2.cc: ...here.
 221         * testsuite/23_containers/bitset/operations/constexpr.cc: Moved to...
 222         * testsuite/20_util/bitset/operations/constexpr.cc: ...here.
 223         * testsuite/23_containers/bitset/requirements/constexpr_functions.cc: Moved to...
 224         * testsuite/20_util/bitset/requirements/constexpr_functions.cc: ...here.
 225         * testsuite/23_containers/bitset/requirements/explicit_instantiation/1.cc: Moved to...
 226         * testsuite/20_util/bitset/requirements/explicit_instantiation/1.cc: ...here.
 227         * testsuite/23_containers/bitset/requirements/explicit_instantiation/1_c++0x.cc: Moved to...
 228         * testsuite/20_util/bitset/requirements/explicit_instantiation/1_c++0x.cc: ...here.
 229         * testsuite/23_containers/headers/bitset/synopsis.cc: Moved to...
 230         * testsuite/20_util/headers/bitset/synopsis.cc: ...here.
 231
 232 2022-09-22  François Dumont  <fdumont@gcc.gnu.org>
 233
 234         * python/libstdcxx/v6/printers.py: Remove ptinter registration for non-existing
 235         types std::__debug::unique_ptr, std::__debug::stack, std::__debug::queue,
 236         std::__debug::priority_queue.
 237
 238 2022-09-21  Jonathan Wakely  <jwakely@redhat.com>
 239
 240         PR libstdc++/91456
 241         * testsuite/20_util/function/91456.cc: Add comment with PR
 242         number.
 243         * testsuite/20_util/is_invocable/91456.cc: Likewise. Replace
 244         std::function checks with std::is_invocable_r checks.
 245
 246 2022-09-21  Jonathan Wakely  <jwakely@redhat.com>
 247
 248         * testsuite/17_intro/headers/c++1998/all_attributes.cc: Remove
 249         unnecessary main function.
 250         * testsuite/17_intro/headers/c++2011/all_attributes.cc:
 251         Likewise.
 252         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
 253         Likewise.
 254         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
 255         Likewise.
 256         * testsuite/17_intro/headers/c++2020/all_attributes.cc:
 257         Likewise.
 258
 259 2022-09-21  Jonathan Wakely  <jwakely@redhat.com>
 260
 261         * testsuite/20_util/headers/memory/synopsis.cc: Add declarations
 262         from C++11 and later.
 263
 264 2022-09-21  Jonathan Wakely  <jwakely@redhat.com>
 265
 266         * doc/xml/manual/documentation_hacking.xml: Remove trailing
 267         whitespace.
 268         * doc/xml/manual/policy_data_structures.xml: Likewise.
 269
 270 2022-09-21  Jonathan Wakely  <jwakely@redhat.com>
 271
 272         * include/c_compatibility/stdlib.h [!_GLIBCXX_HOSTED]: Add
 273         using-declaration for _Exit.
 274
 275 2022-09-21  Jonathan Wakely  <jwakely@redhat.com>
 276
 277         * testsuite/18_support/uncaught_exception/14026.cc: Qualify
 278         call to std::abort.
 279
 280 2022-09-21  Jonathan Wakely  <jwakely@redhat.com>
 281
 282         * include/bits/ranges_base.h: Include <initializer_list>.
 283
 284 2022-09-20  Jonathan Wakely  <jwakely@redhat.com>
 285
 286         * include/c_global/cstdlib [!_GLIBCXX_HOSTED] (quick_exit): Fix
 287         missing space.
 288
 289 2022-09-16  Jonathan Wakely  <jwakely@redhat.com>
 290
 291         PR libstdc++/106953
 292         * include/backward/auto_ptr.h [!_GLIBCXX_HOSTED]: Do not define
 293         shared_ptr members.
 294         * include/bits/alloc_traits.h [!_GLIBCXX_HOSTED]: Do not declare
 295         std::allocator_traits<std::allocator<T>> specializations for
 296         freestanding.
 297         * include/bits/memoryfwd.h [!_GLIBCXX_HOSTED] (allocator): Do
 298         not declare for freestanding.
 299         * include/bits/stl_algo.h [!_GLIBCXX_HOSTED] (stable_partition):
 300         Do not define for freestanding.
 301         [!_GLIBCXX_HOSTED] (merge, stable_sort): Do not use temporary
 302         buffers for freestanding.
 303         * include/bits/stl_algobase.h [!_GLIBCXX_HOSTED]: Do not declare
 304         streambuf iterators and overloaded algorithms using them.
 305         * include/bits/stl_uninitialized.h [!_GLIBCXX_HOSTED]: Do not
 306         define specialized overloads for std::allocator.
 307         * include/bits/unique_ptr.h [!_GLIBCXX_HOSTED] (make_unique)
 308         (make_unique_for_overwrite, operator<<): Do not define for
 309         freestanding.
 310         * include/c_global/cstdlib [!_GLIBCXX_HOSTED] (_Exit): Declare.
 311         Use _GLIBCXX_NOTHROW instead of throw().
 312         * include/debug/assertions.h [!_GLIBCXX_HOSTED]: Ignore
 313         _GLIBCXX_DEBUG for freestanding.
 314         * include/debug/debug.h [!_GLIBCXX_DEBUG]: Likewise.
 315         * include/std/bit [!_GLIBCXX_HOSTED]: Do not use the custom
 316         __int_traits if <ext/numeric_traits.h> is available.
 317         * include/std/functional [!_GLIBCXX_HOSTED]: Do not include
 318         headers that aren't valid for freestanding.
 319         (boyer_moore_searcher, boyer_moore_horspool_searcher): Do not
 320         define for freestanding.
 321         * include/std/iterator [!_GLIBCXX_HOSTED]: Do not include
 322         headers that aren't valid for freestanding.
 323         * include/std/memory [!_GLIBCXX_HOSTED]: Likewise.
 324         * include/std/ranges [!_GLIBCXX_HOSTED] (istream_view): Do not
 325         define for freestanding.
 326         (views::__detail::__is_basic_string_view) [!_GLIBCXX_HOSTED]:
 327         Do not define partial specialization for freestanding.
 328
 329 2022-09-16  Jonathan Wakely  <jwakely@redhat.com>
 330
 331         * include/bits/alloc_traits.h (__alloc_swap)
 332         (__shrink_to_fit_aux): Move here, from ...
 333         * include/bits/allocator.h: ... here.
 334         * include/ext/alloc_traits.h: Do not include allocator.h.
 335
 336 2022-09-16  Jonathan Wakely  <jwakely@redhat.com>
 337
 338         * include/bits/stl_algo.h: Include <bits/stl_algobase.h>.
 339         * include/bits/stl_tempbuf.h: Include headers for __try and
 340         __catch macros, std::pair, and __gnu_cxx::__numeric_traits.
 341         * include/bits/stream_iterator.h: Include <iosfwd> and headers
 342         for std::addressof and std::iterator.
 343         * include/bits/streambuf_iterator.h: Include header for
 344         std::iterator.
 345         * include/std/iterator: Do not include <iosfwd>.
 346
 347 2022-09-16  Jonathan Wakely  <jwakely@redhat.com>
 348
 349         * testsuite/29_atomics/atomic_ref/compare_exchange_padding.cc:
 350         Store value with non-zero padding bits after construction.
 351
 352 2022-09-16  Jonathan Wakely  <jwakely@redhat.com>
 353
 354         * include/tr1/random.h (__detail::_Adaptor::_BEngine): Remove.
 355         (__detail::_Adaptor::_M_g): Make public.
 356         (__detail::_Adaptor<_Engine*, _Dist>): Remove partial
 357         specialization.
 358         (variate_generate::_Value): New helper to simplify handling of
 359         _Engine* and _Engine& template arguments.
 360         (variate_generate::engine_value_type): Define to underlying
 361         engine type, not adapted type.
 362         (variate_generate::engine()): Return underlying engine instead
 363         of adaptor.
 364         * testsuite/tr1/5_numerical_facilities/random/variate_generator/37986.cc:
 365         Fix comment.
 366         * testsuite/tr1/5_numerical_facilities/random/variate_generator/requirements/typedefs.cc:
 367         Check member typedefs have the correct types.
 368
 369 2022-09-16  Jonathan Wakely  <jwakely@redhat.com>
 370
 371         * include/debug/formatter.h [_GLIBCXX_DEBUG_BACKTRACE]
 372         (_Error_formatter): Use 0 as null pointer constant.
 373
 374 2022-09-16  Jonathan Wakely  <jwakely@redhat.com>
 375
 376         * include/bits/allocator.h (__alloc_neq): Remove.
 377         * include/bits/stl_list.h (list::_M_check_equal_allocators):
 378         Compare allocators directly, without __alloc_neq.
 379
 380 2022-09-16  Jonathan Wakely  <jwakely@redhat.com>
 381
 382         * doc/doxygen/user.cfg.in (PREDEFINED): Remove __allocator_base.
 383         * include/bits/allocator.h: Fix nesting of Doxygen commands.
 384
 385 2022-09-16  Jonathan Wakely  <jwakely@redhat.com>
 386
 387         * doc/xml/manual/abi.xml: Document GLIBCXX_3.4.30 and
 388         GLIBCXX_3.4.31 versions.
 389         * doc/html/manual/abi.html: Regenerate.
 390
 391 2022-09-15  Jonathan Wakely  <jwakely@redhat.com>
 392
 393         * include/std/memory: Do not include <bits/stl_algobase.h>.
 394
 395 2022-09-15  Jonathan Wakely  <jwakely@redhat.com>
 396
 397         * include/bits/shared_ptr_atomic.h (_GLIBCXX_TSAN_MUTEX_PRE_LOCK):
 398         Replace with ...
 399         (_GLIBCXX_TSAN_MUTEX_TRY_LOCK): ... this, add try_lock flag.
 400         (_GLIBCXX_TSAN_MUTEX_TRY_LOCK_FAILED): New macro using
 401         try_lock_failed flag
 402         (_GLIBCXX_TSAN_MUTEX_POST_LOCK): Rename to ...
 403         (_GLIBCXX_TSAN_MUTEX_LOCKED): ... this.
 404         (_GLIBCXX_TSAN_MUTEX_PRE_UNLOCK): Remove invalid flag.
 405         (_GLIBCXX_TSAN_MUTEX_POST_UNLOCK): Remove invalid flag.
 406         (_Sp_atomic::_Atomic_count::lock): Use new macros.
 407
 408 2022-09-15  Patrick Palka  <ppalka@redhat.com>
 409
 410         * include/bits/ranges_algo.h (__adjacent_find_fn, adjacent_find):
 411         Move to ...
 412         * include/bits/ranges_util.h: ... here.
 413         * include/std/ranges (chunk_by_view): Define.
 414         (chunk_by_view::_Iterator): Define.
 415         (__detail::__can_chunk_by_view): Define.
 416         (_ChunkBy, chunk_by): Define.
 417         * testsuite/std/ranges/adaptors/chunk_by/1.cc: New test.
 418
 419 2022-09-15  François Dumont  <fdumont@gcc.gnu.org>
 420
 421         * testsuite/20_util/is_complete_or_unbounded/memoization_neg.cc:
 422         Adapt dg-prune-output to _GLIBCXX_INLINE_VERSION mode.
 423
 424 2022-09-15  François Dumont  <fdumont@gcc.gnu.org>
 425
 426         * config/abi/pre/gnu-versioned-namespace.ver: Remove obsolete std::__detail::__8
 427         symbols.
 428
 429 2022-09-14  Jonathan Wakely  <jwakely@redhat.com>
 430
 431         * include/bits/shared_ptr_atomic.h (_GLIBCXX_TSAN_MUTEX_DESTROY)
 432         (_GLIBCXX_TSAN_MUTEX_PRE_LOCK, _GLIBCXX_TSAN_MUTEX_POST_LOCK)
 433         (_GLIBCXX_TSAN_MUTEX_PRE_UNLOCK, _GLIBCXX_TSAN_MUTEX_POST_UNLOCK)
 434         (_GLIBCXX_TSAN_MUTEX_PRE_SIGNAL, _GLIBCXX_TSAN_MUTEX_POST_SIGNAL):
 435         Define macros for TSan annotation functions.
 436         (_Sp_atomic::_Atomic_count): Add annotations.
 437
 438 2022-09-14  Jonathan Wakely  <jwakely@redhat.com>
 439
 440         * include/bits/stl_tempbuf.h: Include <new>.
 441
 442 2022-09-14  Jonathan Wakely  <jwakely@redhat.com>
 443
 444         * testsuite/17_intro/names.cc: Explain why poison pragma can't
 445         be used.
 446
 447 2022-09-14  Jonathan Wakely  <jwakely@redhat.com>
 448
 449         * include/std/future
 450         (_State_baseV2::__setter(exception_ptr&, promise&)): Add
 451         assertion for LWG 2276 precondition.
 452         * testsuite/30_threads/promise/members/set_exception_neg.cc:
 453         New test.
 454
 455 2022-09-14  Jonathan Wakely  <jwakely@redhat.com>
 456
 457         * doc/xml/manual/intro.xml: Document LWG 1203.
 458         * doc/html/*: Regenerate.
 459
 460 2022-09-14  Philipp Fent  <fent@in.tum.de>
 461
 462         * python/libstdcxx/v6/printers.py (access_streambuf_ptrs):
 463         New helper function.
 464         (StdStringBufPrinter, StdStringStreamPrinter): New printers.
 465         (build_libstdcxx_dictionary): Register stringstream printers.
 466         * testsuite/libstdc++-prettyprinters/debug.cc: Check string
 467         streams.
 468         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
 469         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
 470
 471 2022-09-13  Patrick Palka  <ppalka@redhat.com>
 472
 473         * include/std/ranges (__detail::__slide_caches_nothing): Define.
 474         (__detail::__slide_caches_last): Define.
 475         (__detail::__slide_caches_first): Define.
 476         (slide_view): Define.
 477         (enable_borrowed_range<slide_view>): Define.
 478         (slide_view::_Iterator): Define.
 479         (slide_view::_Sentinel): Define.
 480         (views::__detail::__can_slide_view): Define.
 481         (views::_Slide, views::slide): Define.
 482         * testsuite/std/ranges/adaptors/slide/1.cc: New test.
 483
 484 2022-09-13  Patrick Palka  <ppalka@redhat.com>
 485
 486         * include/std/ranges (__detail::__div_ceil): Define.
 487         (chunk_view): Define.
 488         (chunk_view::_OuterIter): Define.
 489         (chunk_view::_OuterIter::value_type): Define.
 490         (chunk_view::_InnerIter): Define.
 491         (chunk_view<_Vp>): Define partial specialization for forward
 492         ranges.
 493         (enable_borrowed_range<chunk_view>): Define.
 494         (chunk_view<_Vp>::_Iterator): Define.
 495         (views::__detail::__can_chunk_view): Define.
 496         (views::_Chunk, views::chunk): Define.
 497         * testsuite/std/ranges/adaptors/chunk/1.cc: New test.
 498
 499 2022-09-13  Patrick Palka  <ppalka@redhat.com>
 500
 501         * include/std/ranges (join_view::_Iterator::_M_satisfy):
 502         Adjust resetting _M_inner as per LWG 3569.
 503         (join_view::_Iterator::_M_inner): Wrap in std::optional
 504         as per LWG 3569.
 505         (join_view::_Iterator::_Iterator): Relax constraints as
 506         per LWG 3569.
 507         (join_view::_Iterator::operator*): Adjust as per LWG 3569.
 508         (join_view::_Iterator::operator->): Likewise.
 509         (join_view::_Iterator::operator++): Likewise.
 510         (join_view::_Iterator::operator--): Likewise.
 511         (join_view::_Iterator::iter_move): Likewise.
 512         (join_view::_Iterator::iter_swap): Likewise.
 513         * testsuite/std/ranges/adaptors/join.cc (test14): New test.
 514
 515 2022-09-13  Patrick Palka  <ppalka@redhat.com>
 516
 517         * include/debug/safe_iterator.h (_GLIBCXX_DEBUG_VERIFY_OPERANDS):
 518         Add parentheses to avoid -Wparentheses warning.
 519
 520 2022-09-12  Patrick Palka  <ppalka@redhat.com>
 521
 522         PR libstdc++/106320
 523         * testsuite/std/ranges/adaptors/join.cc (test13): New test.
 524
 525 2022-09-12  Jonathan Wakely  <jwakely@redhat.com>
 526
 527         * testsuite/19_diagnostics/error_code/cons/lwg3629.cc: Fix
 528         comments.
 529         * testsuite/19_diagnostics/error_condition/cons/lwg3629.cc:
 530         Likewise.
 531
 532 2022-09-12  Jakub Jelinek  <jakub@redhat.com>
 533
 534         PR tree-optimization/105329
 535         * acinclude.m4 (libtool_VERSION): Change to 6:31:0.
 536         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Don't export
 537         std::basic_string methods with name length of 15.
 538         (GLIBCXX_3.4.31): Export std::basic_string::_M_replace_cold.
 539         * testsuite/util/testsuite_abi.cc (check_version): Handle
 540         GLIBCXX_3.4.31.
 541         * include/bits/basic_string.h (std::basic_string::_M_replace_cold):
 542         Declare.
 543         * include/bits/basic_string.tcc (std::basic_string::_M_replace_cold):
 544         Define and export even for C++20.
 545         (std::basic_string::_M_replace): Use __builtin_expect, outline
 546         the overlapping case to _M_replace_cold.
 547         * configure: Regenerated.
 548
 549 2022-09-09  Jonathan Wakely  <jwakely@redhat.com>
 550
 551         * include/bits/atomic_base.h (__atomic_impl::__compare_exchange):
 552         Rename __weak to __is_weak.
 553         * testsuite/17_intro/names.cc: Add __weak and __strong.
 554
 555 2022-09-09  Patrick Palka  <ppalka@redhat.com>
 556
 557         PR libstdc++/106803
 558         * include/std/ranges (views::_ZipTransform::operator()): Correct
 559         return type in the empty case.
 560         (views::_AdjacentTransform::operator()): Likewise.
 561
 562 2022-09-09  Patrick Palka  <ppalka@redhat.com>
 563
 564         PR libstdc++/106798
 565         * include/std/ranges (adjacent_view::_Iterator::_Iterator): Fix
 566         typo.
 567         * testsuite/std/ranges/adaptors/adjacent/1.cc (test04): New test.
 568
 569 2022-09-09  Patrick Palka  <ppalka@redhat.com>
 570
 571         PR libstdc++/106766
 572         * include/std/ranges (zip_view::_Iterator::operator-): Use
 573         __to_unsigned_like instead of make_unsigned_t.
 574         (zip_view::_Sentinel::operator-): Likewise.
 575         * testsuite/std/ranges/zip/1.cc (test04): New test.
 576
 577 2022-09-08  François Dumont  <fdumont@gcc.gnu.org>
 578
 579         * testsuite/util/testsuite_performance.h (__gnu_test::MallocInfo): New.
 580         (__gnu_test::malloc_info): New, replace mallinfo on current platform
 581         supporting it and use mallinfo2 when glibc >= 2.33.
 582
 583 2022-09-08  Jonathan Wakely  <jwakely@redhat.com>
 584
 585         PR c++/106838
 586         * testsuite/20_util/is_complete_or_unbounded/memoization_neg.cc:
 587         Prune additional errors from front-end.
 588         * testsuite/20_util/is_move_constructible/incomplete_neg.cc:
 589         Likewise.
 590         * testsuite/20_util/is_nothrow_swappable/incomplete_neg.cc:
 591         Likewise.
 592         * testsuite/20_util/is_nothrow_swappable_with/incomplete_neg.cc:
 593         Likewise.
 594         * testsuite/20_util/is_swappable_with/incomplete_neg.cc:
 595         Likewise.
 596
 597 2022-09-08  Jonathan Wakely  <jwakely@redhat.com>
 598
 599         * include/c_global/cstddef (byte): Add always_inline attribute
 600         to all operator overloads.
 601         (to_integer): Add always_inline attribute.
 602
 603 2022-09-08  Thomas Rodgers  <trodgers@redhat.com>
 604             Jakub Jelinek  <jakub@redhat.com>
 605             Jonathan Wakely  <jwakely@redhat.com>
 606
 607         * include/bits/atomic_base.h (__atomic_impl::__maybe_has_padding):
 608         New function.
 609         (__atomic_impl::clear_padding): Likewise.
 610         (__atomic_impl::__compare_exchange): Likewise.
 611         (__atomic_impl::compare_exchange_weak): Delegate to
 612         __compare_exchange.
 613         (__atomic_impl::compare_exchange_strong): Likewise.
 614         * include/std/atomic (atomic<T>::atomic(T)): Clear padding when
 615         possible in a constexpr function.
 616         (atomic::store): Clear padding.
 617         (atomic::exchange): Likewise.
 618         (atomic::compare_exchange_weak): Use __compare_exchange.
 619         (atomic::compare_exchange_strong): Likewise.
 620         * testsuite/29_atomics/atomic/compare_exchange_padding.cc: New
 621         test.
 622         * testsuite/29_atomics/atomic_ref/compare_exchange_padding.cc:
 623         New test.
 624
 625 2022-09-08  Jonathan Wakely  <jwakely@redhat.com>
 626
 627         * include/std/system_error (__adl_only::make_error_code): Add
 628         deleted function.
 629         (__adl_only::make_error_condition): Likewise.
 630         (error_code::error_code(ErrorCodeEnum)): Add using-declaration
 631         for deleted function.
 632         (error_condition::error_condition(ErrorConditionEnum)):
 633         Likewise.
 634         * testsuite/19_diagnostics/error_code/cons/lwg3629.cc: New test.
 635         * testsuite/19_diagnostics/error_condition/cons/lwg3629.cc: New test.
 636
 637 2022-09-07  Jonathan Wakely  <jwakely@redhat.com>
 638
 639         * include/std/barrier: Add missing runtime exception.
 640
 641 2022-09-07  Patrick Palka  <ppalka@redhat.com>
 642
 643         * include/std/type_traits (is_reference): Make the primary
 644         template derive from false_type.  Define two partial
 645         specializations that derive from true_type.
 646
 647 2022-09-07  Patrick Palka  <ppalka@redhat.com>
 648
 649         * include/std/type_traits (__is_void_helper): Remove.
 650         (is_void): Make the primary template derive from false_type,
 651         and define four explicit specializations that derive from
 652         true_type.
 653         (__is_null_pointer_helper, is_null_pointer): Likewise.
 654
 655 2022-09-07  Jason Merrill  <jason@redhat.com>
 656
 657         * libsupc++/dyncast.cc (__dynamic_cast): Avoid virtual function
 658         call in simple success case.
 659
 660 2022-09-06  Philipp Fent  <fent@in.tum.de>
 661
 662         * testsuite/libstdc++-prettyprinters/48362.cc: Fix expected
 663         tuple indices.
 664         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
 665
 666 2022-09-05  Jonathan Wakely  <jwakely@redhat.com>
 667
 668         * include/std/type_traits (__success_type, __failure_type): Move
 669         definitions later in the file.
 670
 671 2022-09-05  Jonathan Wakely  <jwakely@redhat.com>
 672
 673         * include/std/type_traits (is_trivial_v, is_trivially_copyable_v)
 674         (is_standard_layout_v, is_pod_v, is_literal_type_v): Use
 675         built-in instead of class template.
 676         (is_same_v): Add partial specialization for true case.
 677
 678 2022-09-02  Patrick Palka  <ppalka@redhat.com>
 679
 680         * include/std/tuple (tuple::_UseOtherCtor): Use ::type when
 681         deriving from __and_, __or_ or __not_.
 682         * include/std/type_traits (negation): Likewise.
 683         (is_unsigned): Likewise.
 684         (__is_implicitly_default_constructible): Likewise.
 685         (is_trivially_destructible): Likewise.
 686         (__is_nt_invocable_impl): Likewise.
 687
 688 2022-09-02  Jonathan Wakely  <jwakely@redhat.com>
 689
 690         * include/std/type_traits (is_constructible_v)
 691         (is_default_constructible_v, is_copy_constructible_v)
 692         (is_move_constructible_v): Define using __is_constructible.
 693         (is_assignable_v, is_copy_assignable_v, is_move_assignable_v):
 694         Define using __is_assignable.
 695         (is_trivially_constructible_v)
 696         (is_trivially_default_constructible_v)
 697         (is_trivially_copy_constructible_v)
 698         (is_trivially_move_constructible_v): Define using
 699         __is_trivially_constructible.
 700         (is_trivially_assignable_v, is_trivially_copy_assignable_v)
 701         (is_trivially_move_assignable_v): Define using
 702         __is_trivially_assignable.
 703         (is_nothrow_constructible_v)
 704         (is_nothrow_default_constructible_v)
 705         (is_nothrow_copy_constructible_v)
 706         (is_nothrow_move_constructible_v): Define using
 707         __is_nothrow_constructible.
 708         (is_nothrow_assignable_v, is_nothrow_copy_assignable_v)
 709         (is_nothrow_move_assignable_v): Define using
 710         __is_nothrow_assignable.
 711
 712 2022-09-02  Patrick Palka  <ppalka@redhat.com>
 713
 714         * include/std/type_traits (__or_, __and_, __not_): Redefine as a
 715         class template instead of as an alias template.
 716         * testsuite/20_util/logical_traits/requirements/short_circuit.cc:
 717         Add more tests for conjunction and disjunction.  Add corresponding
 718         tests for __and_ and __or_.
 719
 720 2022-09-01  Jonathan Wakely  <jwakely@redhat.com>
 721
 722         * include/std/ranges (adjacent_transform_view::_Iterator): Add
 723         typename keyword before dependent qualified-id.
 724
 725 2022-09-01  Jonathan Wakely  <jwakely@redhat.com>
 726
 727         * include/std/type_traits (__is_referenceable): Remove.
 728         (__add_lvalue_reference_helper, __add_rvalue_reference_helper):
 729         Use __void_t instead of __is_referenceable.
 730         (__add_pointer_helper): Likewise.
 731         (add_pointer): Add partial specializations for reference types.
 732
 733 2022-09-01  Jonathan Wakely  <jwakely@redhat.com>
 734
 735         * include/std/type_traits (__is_constructible_impl): Replace
 736         class template with alias template.
 737         (is_default_constructible, is_nothrow_constructible)
 738         (is_nothrow_constructible): Simplify base-specifier.
 739         (__is_copy_constructible_impl, __is_move_constructible_impl)
 740         (__is_nothrow_copy_constructible_impl)
 741         (__is_nothrow_move_constructible_impl): Remove class templates.
 742         (is_copy_constructible, is_move_constructible)
 743         (is_nothrow_constructible, is_nothrow_default_constructible)
 744         (is_nothrow_copy_constructible, is_nothrow_move_constructible):
 745         Adjust base-specifiers to use __is_constructible_impl.
 746         (__is_copy_assignable_impl, __is_move_assignable_impl)
 747         (__is_nt_copy_assignable_impl, __is_nt_move_assignable_impl):
 748         Remove class templates.
 749         (__is_assignable_impl): New alias template.
 750         (is_assignable, is_copy_assignable, is_move_assignable):
 751         Adjust base-specifiers to use new alias template.
 752         (is_nothrow_copy_assignable, is_nothrow_move_assignable):
 753         Adjust base-specifiers to use existing alias template.
 754         (__is_trivially_constructible_impl): New alias template.
 755         (is_trivially_constructible, is_trivially_default_constructible)
 756         (is_trivially_copy_constructible)
 757         (is_trivially_move_constructible): Adjust base-specifiers to use
 758         new alias template.
 759         (__is_trivially_assignable_impl): New alias template.
 760         (is_trivially_assignable, is_trivially_copy_assignable)
 761         (is_trivially_move_assignable): Adjust base-specifier to use
 762         new alias template.
 763         (__add_lval_ref_t, __add_rval_ref_t): New alias templates.
 764         (add_lvalue_reference, add_rvalue_reference): Use new alias
 765         templates.
 766
 767 2022-09-01  Jonathan Wakely  <jwakely@redhat.com>
 768
 769         * include/std/type_traits (__decay_selector): Add partial
 770         specializations for array types. Only check for function types
 771         when not dealing with an array.
 772         (decay): Add partial specializations for reference types.
 773
 774 2022-09-01  Jonathan Wakely  <jwakely@redhat.com>
 775
 776         * include/std/type_traits (is_lvalue_reference_v)
 777         (is_rvalue_reference_v, is_reference_v, is_const_v)
 778         (is_volatile_v): Define using partial specializations instead
 779         of instantiating class templates.
 780
 781 2022-09-01  Jonathan Wakely  <jwakely@redhat.com>
 782
 783         * include/std/type_traits (is_enum_v, is_class_v, is_union_v)
 784         (is_empty_v, is_polymoprhic_v, is_abstract_v, is_final_v)
 785         (is_base_of_v, is_aggregate_v): Use built-in directly instead of
 786         instantiating class template.
 787
 788 2022-09-01  Jonathan Wakely  <jwakely@redhat.com>
 789
 790         * include/std/type_traits (is_scoped_enum): Remove workaround.
 791
 792 2022-09-01  Patrick Palka  <ppalka@redhat.com>
 793
 794         * include/std/ranges (__detail::__unarize): Define.
 795         (adjacent_view::_Iterator): Befriend adjacent_transform_view.
 796         (adjacent_transform_view): Define.
 797         (adjacent_transform_view::_Iterator): Define.
 798         (adjacent_transform_view::_Sentinel): Define.
 799         (views::__detail::__can_adjacent_transform_view): Define.
 800         (views::_AdjacentTransform): Define.
 801         (views::adjacent_transform): Define.
 802         (views::pairwise_transform): Define.
 803         * testsuite/std/ranges/adaptors/adjacent_transform/1.cc: New test.
 804
 805 2022-09-01  Jonathan Wakely  <jwakely@redhat.com>
 806
 807         * include/std/type_traits (__is_array_known_bounds): Add partial
 808         specialization instead of using std::extent.
 809         (__is_array_unknown_bounds): Likewise.
 810         (extent): Add partial specializations to stop recursion after
 811         the result is found.
 812         (is_array_v): Add partial specializations instead of
 813         instantiating the class template.
 814         (rank_v, extent_v): Likewise.
 815         (is_bounded_array_v, is_unbounded_array_v): Likewise.
 816         (is_bounded_array, is_unbounded_array): Define in terms of the
 817         variable templates.
 818
 819 2022-08-31  Patrick Palka  <ppalka@redhat.com>
 820
 821         * include/bits/ranges_base.h (__advance_fn::operator()): Add
 822         parentheses in assert condition to avoid -Wparentheses warning.
 823         * include/std/ranges: (take_view::take_view): Uglify 'base'.
 824         (take_while_view::take_while_view): Likewise.
 825         (elements_view::elements_view): Likewise.
 826         (views::_Zip::operator()): Adjust position of [[nodiscard]] for
 827         compatibility with -fconcepts-ts.
 828         (zip_transform_view::_Sentinel): Uglify 'OtherConst'.
 829         (views::_ZipTransform::operator()): Adjust position of
 830         [[nodiscard]] for compatibilty with -fconcepts-ts.
 831
 832 2022-08-31  Martin Liska  <mliska@suse.cz>
 833
 834         * configure: Regenerate.
 835         * crossconfig.m4: Remove deprecated ports.
 836
 837 2022-08-31  François Dumont  <fdumont@gcc.gnu.org>
 838
 839         * include/debug/debug.h: Use nullptr rather than '0' in checks in post-C++11.
 840         * include/debug/string: Likewise.
 841         * testsuite/21_strings/basic_string/operations/ends_with/char.cc: Use __gnu_test::string.
 842         * testsuite/21_strings/basic_string/operations/ends_with/nonnull.cc: Likewise.
 843         * testsuite/21_strings/basic_string/operations/ends_with/wchar_t.cc: Likewise.
 844         * testsuite/21_strings/basic_string/operations/starts_with/wchar_t.cc: Likewise.
 845         * testsuite/21_strings/basic_string/operations/starts_with/nonnull.cc: Likewise.
 846         * testsuite/21_strings/basic_string/operations/starts_with/char.cc: Likewise..
 847
 848 2022-08-31  Patrick Palka  <ppalka@redhat.com>
 849
 850         * include/std/ranges (adjacent_view): Define.
 851         (enable_borrowed_range<adjacent_view>): Define.
 852         (__detail::__repeated_tuple): Define.
 853         (adjacent_view::_Iterator): Define.
 854         (adjacent_view::_Sentinel): Define.
 855         (views::__detail::__can_adjacent_view): Define.
 856         (views::_Adjacent): Define.
 857         (views::adjacent): Define.
 858         (views::pairwise): Define.
 859         * testsuite/std/ranges/adaptors/adjacent/1.cc: New test.
 860
 861 2022-08-31  François Dumont  <fdumont@gcc.gnu.org>
 862
 863         * include/debug/formatter.h
 864         [_GLIBCXX_HAVE_STACKTRACE](__glibcxx_backtrace_state): Declare.
 865         [_GLIBCXX_HAVE_STACKTRACE](__glibcxx_backtrace_create_state): Declare.
 866         [_GLIBCXX_HAVE_STACKTRACE](__glibcxx_backtrace_full_callback): Define.
 867         [_GLIBCXX_HAVE_STACKTRACE](__glibcxx_backtrace_error_callback): Define.
 868         [_GLIBCXX_HAVE_STACKTRACE](__glibcxx_backtrace_full_func): Define.
 869         [_GLIBCXX_HAVE_STACKTRACE](__glibcxx_backtrace_full): Declare.
 870         [_GLIBCXX_HAVE_STACKTRACE](_Error_formatter::_M_backtrace_state): New.
 871         [_GLIBCXX_HAVE_STACKTRACE](_Error_formatter::_M_backtrace_full): New.
 872         * src/c++11/debug.cc [_GLIBCXX_HAVE_STACKTRACE](print_backtrace): New.
 873         (_Error_formatter::_M_error()): Adapt.
 874         * src/libbacktrace/Makefile.am: Add backtrace.c.
 875         * src/libbacktrace/Makefile.in: Regenerate.
 876         * src/libbacktrace/backtrace-rename.h (backtrace_full): New.
 877         * testsuite/23_containers/vector/debug/assign4_backtrace_neg.cc: New test.
 878         * doc/xml/manual/debug_mode.xml: Document _GLIBCXX_DEBUG_BACKTRACE.
 879         * doc/xml/manual/using.xml: Likewise.
 880
 881 2022-08-31  Patrick Palka  <ppalka@redhat.com>
 882
 883         * testsuite/20_util/logical_traits/requirements/short_circuit.cc: New test.
 884
 885 2022-08-31  Jonathan Wakely  <jwakely@redhat.com>
 886
 887         * include/bits/refwrap.h (reference_wrapper::operator()): Add
 888         noexcept-specifier and use __invoke_result instead of result_of.
 889         * testsuite/20_util/reference_wrapper/invoke-noexcept.cc: New test.
 890
 891 2022-08-31  Jonathan Wakely  <jwakely@redhat.com>
 892
 893         * testsuite/20_util/reference_wrapper/invoke-2.cc: Improve
 894         comments.
 895         * testsuite/20_util/reference_wrapper/invoke-3.cc: Likewise.
 896         * testsuite/20_util/reference_wrapper/invoke.cc: Likewise.
 897
 898 2022-08-31  Jonathan Wakely  <jwakely@redhat.com>
 899
 900         * include/bits/basic_string.h (basic_string): Add nodiscard
 901         attribute to all relevant functions.
 902         * include/std/string_view (basic_string_view): Likewise.
 903         * testsuite/21_strings/basic_string/capacity/1.cc: Cast unused
 904         results to void.
 905         * testsuite/21_strings/basic_string/capacity/char/1.cc:
 906         Likewise.
 907         * testsuite/21_strings/basic_string/capacity/wchar_t/1.cc:
 908         Likewise.
 909         * testsuite/21_strings/basic_string/cons/char/self_move.cc:
 910         Likewise.
 911         * testsuite/21_strings/basic_string/element_access/char/1.cc:
 912         Likewise.
 913         * testsuite/21_strings/basic_string/element_access/char/21674.cc:
 914         Likewise.
 915         * testsuite/21_strings/basic_string/element_access/wchar_t/1.cc:
 916         Likewise.
 917         * testsuite/21_strings/basic_string/element_access/wchar_t/21674.cc:
 918         Likewise.
 919         * testsuite/21_strings/basic_string/lwg2758.cc: Likewise.
 920         * testsuite/21_strings/basic_string/lwg2946.cc: Likewise.
 921         * testsuite/21_strings/basic_string/operations/contains/nonnull.cc:
 922         Add -Wno-unused-result to options.
 923         * testsuite/21_strings/basic_string/operations/ends_with/nonnull.cc:
 924         Likewise.
 925         * testsuite/21_strings/basic_string/operations/starts_with/nonnull.cc:
 926         Likewise.
 927         * testsuite/21_strings/basic_string/operators/char/1.cc: Cast
 928         unused results to void.
 929         * testsuite/21_strings/basic_string/operators/wchar_t/1.cc:
 930         Likewise.
 931         * testsuite/21_strings/basic_string_view/capacity/1.cc:
 932         Likewise.
 933         * testsuite/21_strings/basic_string_view/element_access/char/1.cc:
 934         Likewise.
 935         * testsuite/21_strings/basic_string_view/element_access/char/2.cc:
 936         Likewise.
 937         * testsuite/21_strings/basic_string_view/element_access/wchar_t/1.cc:
 938         Likewise.
 939         * testsuite/21_strings/basic_string_view/element_access/wchar_t/2.cc:
 940         Likewise.
 941         * testsuite/21_strings/basic_string_view/operations/contains/nonnull.cc:
 942         Likewise.
 943         Add -Wno-unused-result to options.
 944         * testsuite/21_strings/basic_string_view/operations/ends_with/nonnull.cc:
 945         Likewise.
 946         * testsuite/21_strings/basic_string_view/operations/starts_with/nonnull.cc:
 947         Likewise.
 948         * testsuite/27_io/basic_stringbuf/sputbackc/char/1.cc: Cast
 949         unused results to void.
 950         * testsuite/27_io/basic_stringbuf/sputbackc/wchar_t/1.cc:
 951         Likewise.
 952         * testsuite/27_io/basic_stringbuf/sungetc/char/1.cc: Likewise.
 953         * testsuite/27_io/basic_stringbuf/sungetc/wchar_t/1.cc:
 954         Likewise.
 955
 956 2022-08-27  Patrick Palka  <ppalka@redhat.com>
 957
 958         * testsuite/20_util/logical_traits/requirements/base_classes.cc: New test.
 959
 960 2022-08-26  Patrick Palka  <ppalka@redhat.com>
 961
 962         * include/std/ranges (zip_view::_Iterator::operator<): Remove
 963         as per LWG 3692.
 964         (zip_view::_Iterator::operator>): Likewise.
 965         (zip_view::_Iterator::operator<=): Likewise.
 966         (zip_view::_Iterator::operator>=): Likewise.
 967         (zip_view::_Iterator::operator<=>): Remove three_way_comparable
 968         constraint as per LWG 3692.
 969         (zip_transform_view::_Iterator): Ditto as per LWG 3702.
 970
 971 2022-08-26  Patrick Palka  <ppalka@redhat.com>
 972
 973         * include/std/ranges (zip_view::_Iterator): Befriend
 974         zip_transform_view.
 975         (__detail::__range_iter_cat): Define.
 976         (zip_transform_view): Define.
 977         (zip_transform_view::_Iterator): Define.
 978         (zip_transform_view::_Sentinel): Define.
 979         (views::__detail::__can_zip_transform_view): Define.
 980         (views::_ZipTransform): Define.
 981         (views::zip_transform): Define.
 982         * testsuite/std/ranges/zip_transform/1.cc: New test.
 983
 984 2022-08-26  Patrick Palka  <ppalka@redhat.com>
 985
 986         * include/std/type_traits (enable_if, __enable_if_t): Define them
 987         earlier.
 988         (__detail::__first_t): Define.
 989         (__detail::__or_fn, __detail::__and_fn): Declare.
 990         (__or_, __and_): Redefine as alias templates in terms of __or_fn
 991         and __and_fn.
 992         (__not_): Redefine as an alias template.
 993         (__detail::__disjunction_impl, __detail::__conjunction_impl):
 994         Define.
 995         (conjuction, disjunction): Redefine in terms of __disjunction_impl
 996         and __conjunction_impl.
 997
 998 2022-08-26  Jonathan Wakely  <jwakely@redhat.com>
 999
1000         * include/std/system_error (error_code::_Check): New alias
1001         template for constructor SFINAE constraint.
1002         (error_code::error_code(ErrorCodeEnum)): Use it.
1003         (error_code::operator=(ErrorCodeEnum)): Remove.
1004         (error_condition::_Check): New alias template for constraint.
1005         (error_condition::error_condition(ErrorConditionEnum)): Use it.
1006         (error_condition::operator=(ErrorConditionEnum)): Remove.
1007         * testsuite/19_diagnostics/error_code/cons/1.cc: Check
1008         constructor taking user-defined error enum.
1009         * testsuite/19_diagnostics/error_condition/cons/1.cc: Likewise.
1010
1011 2022-08-26  Jonathan Wakely  <jwakely@redhat.com>
1012
1013         * include/bits/basic_string.h (starts_with, ends_with, contains):
1014         Add nonnull attribute.
1015         * include/bits/cow_string.h (starts_with, ends_with, contains):
1016         Likewise.
1017         * include/std/string_view (starts_with, ends_with, contains):
1018         Likewise.
1019         * testsuite/21_strings/basic_string/operations/contains/nonnull.cc
1020         * testsuite/21_strings/basic_string/operations/ends_with/nonnull.cc
1021         * testsuite/21_strings/basic_string/operations/starts_with/nonnull.cc
1022         * testsuite/21_strings/basic_string_view/operations/contains/nonnull.cc
1023         * testsuite/21_strings/basic_string_view/operations/ends_with/nonnull.cc
1024         * testsuite/21_strings/basic_string_view/operations/starts_with/nonnull.cc
1025
1026 2022-08-25  Patrick Palka  <ppalka@redhat.com>
1027
1028         * include/std/ranges (lazy_split_view::_OuterIter::_M_current):
1029         Remove redundant comment.
1030         (lazy_split_view::_M_current): Likewise.
1031         (common_view::common_view): Remove commented out view-converting
1032         constructor as per LWG3405.
1033         (elements_view::_Iterator::_Iterator): Uglify 'current' and 'i'.
1034
1035 2022-08-24  Patrick Palka  <ppalka@redhat.com>
1036
1037         * include/bits/ranges_algo.h (__min_fn, min): Move to ...
1038         * include/bits/ranges_util.h: ... here, in order to avoid
1039         including all of ranges_algo.h from <ranges>.
1040         * include/std/ranges (__detail::__zip_is_common): Define for
1041         C++23 as per P2321R2.
1042         (__detail::__tuple_or_pair): Likewise.
1043         (__detail::__tuple_or_pair_t): Likewise.
1044         (__detail::__tuple_transform): Likewise.
1045         (__detail::__tuple_for_each): Likewise.
1046         (zip_view): Likewise.
1047         (enable_borrowed_range<zip_view>): Likewise.
1048         (__detail::__all_random_access): Likewise.
1049         (__detail::__all_bidirectional): Likewise.
1050         (__detail::__all_forward): Likewise.
1051         (__detail::__zip_view_iter_cat): Likewise.
1052         (zip_view::_Iterator): Likewise.
1053         (zip_view::_Sentinel): Likewise.
1054         * testsuite/std/ranges/zip/1.cc: New test.
1055
1056 2022-08-24  Jonathan Wakely  <jwakely@redhat.com>
1057
1058         Revert:
1059         2022-08-24  Will Hawkins  <whh8b@obs.cr>
1060
1061         * include/bits/basic_string.h (operator+(const string&, const char*)):
1062         Remove naive implementation.
1063         * include/bits/basic_string.tcc (operator+(const string&, const char*)):
1064         Add single-allocation implementation.
1065
1066 2022-08-24  Patrick Palka  <ppalka@redhat.com>
1067
1068         * include/bits/stl_pair.h (pair::swap const): Add non-standard
1069         is_swappable_v constraints.
1070         * include/std/tuple (tuple::swap const): Likewise.
1071         * testsuite/20_util/tuple/cons/noexcept_specs.cc: Correct some
1072         asserts in C++23 mode.
1073
1074 2022-08-24  Jonathan Wakely  <jwakely@redhat.com>
1075
1076         * include/bits/stl_algo.h (__stable_sort): Cast size to
1077         iterator's difference type.
1078         * testsuite/25_algorithms/stable_sort/4.cc: New test.
1079
1080 2022-08-24  Will Hawkins  <whh8b@obs.cr>
1081
1082         * include/bits/basic_string.h (operator+(const string&, const char*)):
1083         Remove naive implementation.
1084         * include/bits/basic_string.tcc (operator+(const string&, const char*)):
1085         Add single-allocation implementation.
1086
1087 2022-08-24  Jonathan Wakely  <jwakely@redhat.com>
1088
1089         * testsuite/20_util/duration_cast/rounding.cc: Check abs with
1090         non-reduced duration.
1091
1092 2022-08-23  Patrick Palka  <ppalka@redhat.com>
1093
1094         * include/bits/stl_bvector.h (_Bit_reference::operator=): Define
1095         const overload for C++23 as per P2321R2.
1096         * include/bits/stl_pair.h (pair::swap): Likewise.
1097         (pair::pair): Define additional converting constructors for
1098         C++23 as per P2321R2.
1099         (pair::operator=): Define const overloads for C++23 as per
1100         P2321R2.
1101         (swap): Define overload taking const pair& for C++23 as per
1102         P2321R2.
1103         (basic_common_reference): Define partial specialization for
1104         pair for C++23 as per P2321R2.
1105         (common_type): Likewise.
1106         * include/bits/uses_allocator_args.h
1107         (uses_allocator_construction_args): Define additional pair
1108         overloads for C++23 as per P2321R2.
1109         * include/std/tuple (_Tuple_impl::_Tuple_impl): Define
1110         additional converting constructors for C++23 as per P2321R2.
1111         (_Tuple_impl::_M_assign): Define const overloads for C++23
1112         as per P2321R2.
1113         (_Tuple_impl::_M_swap): Likewise.
1114         (tuple::__constructible): Define as a convenient renaming of
1115         _TCC<true>::__constructible.
1116         (tuple::__convertible): As above but for _TCC<true>::__convertible.
1117         (tuple::tuple): Define additional converting constructors for
1118         C++23 as per P2321R2.
1119         (tuple::operator=): Define const overloads for C++23 as per
1120         P2321R2.
1121         (tuple::swap): Likewise.
1122         (basic_common_reference): Define partial specialization for
1123         tuple for C++23 as per P2321R2.
1124         (common_type): Likewise.
1125         * testsuite/20_util/pair/p2321r2.cc: New test.
1126         * testsuite/20_util/tuple/p2321r2.cc: New test.
1127         * testsuite/23_containers/vector/bool/element_access/1.cc: New test.
1128
1129 2022-08-23  Patrick Palka  <ppalka@redhat.com>
1130
1131         * include/std/tuple (_TupleConstraints::__convertible): Define.
1132         (_TupleConstraints::__constructible): Define.
1133         (_TupleConstraints::__is_explicitly_constructible): Redefine this
1134         in terms of __convertible and __constructible.
1135         (_TupleConstraints::__is_implicitly_constructible): Likewise.
1136
1137 2022-08-23  Jonathan Wakely  <jwakely@redhat.com>
1138
1139         PR libstdc++/106589
1140         * include/std/variant (__do_visit): Handle is_void<R> for zero
1141         argument case.
1142         * testsuite/20_util/variant/visit_r.cc: Check std::visit<void>(v).
1143
1144 2022-08-22  Jonathan Wakely  <jwakely@redhat.com>
1145
1146         PR libstdc++/105678
1147         * doc/xml/manual/using.xml: Document -lstdc++_libbacktrace
1148         requirement for using std::stacktrace. Also adjust -frtti and
1149         -fexceptions to document non-default (i.e. negative) forms.
1150         * doc/html/*: Regenerate.
1151
1152 2022-08-22  Jonathan Wakely  <jwakely@redhat.com>
1153
1154         PR libstdc++/106695
1155         * include/bits/std_thread.h (thread::_State_impl): Forward
1156         individual arguments to _Invoker constructor.
1157         (thread::_Invoker): Add constructor. Delete copies.
1158         * include/std/future (__future_base::_Deferred_state): Forward
1159         individual arguments to _Invoker constructor.
1160         (__future_base::_Async_state_impl): Likewise.
1161         * testsuite/30_threads/async/106695.cc: New test.
1162         * testsuite/30_threads/thread/106695.cc: New test.
1163
1164 2022-08-22  Jonathan Wakely  <jwakely@redhat.com>
1165
1166         PR libstdc++/106607
1167         * include/bits/regex_compiler.tcc (_Compiler::_M_cur_int_value):
1168         Use built-ins to check for integer overflow in back-reference
1169         number.
1170         * testsuite/28_regex/basic_regex/106607.cc: New test.
1171
1172 2022-08-17  Keef Aragon  <keef.aragon@konscious.net>
1173
1174         * libsupc++/eh_alloc.cc (pool::free): Inverse comparison.
1175
1176 2022-08-08  François Dumont  <fdumont@gcc.gnu.org>
1177
1178         * include/debug/formatter.h (__singular_value_init): New _Iterator_state enum entry.
1179         (_Parameter<>(const _Safe_iterator<>&, const char*, _Is_iterator)): Check if iterator
1180         parameter is value-initialized.
1181         (_Parameter<>(const _Safe_local_iterator<>&, const char*, _Is_iterator)): Likewise.
1182         * include/debug/safe_iterator.h (_Safe_iterator<>::_M_value_initialized()): New. Adapt
1183         checks.
1184         * include/debug/safe_local_iterator.h (_Safe_local_iterator<>::_M_value_initialized()): New.
1185         Adapt checks.
1186         * src/c++11/debug.cc (_Safe_iterator_base::_M_reset): Do not reset _M_version.
1187         (print_field(PrintContext&, const _Parameter&, const char*)): Adapt state_names.
1188         * testsuite/23_containers/deque/debug/iterator1_neg.cc: New test.
1189         * testsuite/23_containers/deque/debug/iterator2_neg.cc: New test.
1190         * testsuite/23_containers/forward_list/debug/iterator1_neg.cc: New test.
1191         * testsuite/23_containers/forward_list/debug/iterator2_neg.cc: New test.
1192         * testsuite/23_containers/forward_list/debug/iterator3_neg.cc: New test.
1193
1194 2022-08-05  Jonathan Wakely  <jwakely@redhat.com>
1195
1196         * include/experimental/scope (__cpp_lib_experimental_scope):
1197         Define.
1198         * testsuite/experimental/scopeguard/uniqueres.cc: Check macro.
1199
1200 2022-08-05  Jonathan Wakely  <jwakely@redhat.com>
1201
1202         * include/Makefile.am: Add new header.
1203         * include/Makefile.in: Regenerate.
1204         * include/experimental/scope: New file.
1205         * testsuite/experimental/scopeguard/uniqueres.cc: New test.
1206         * testsuite/experimental/scopeguard/exit.cc: New test.
1207
1208 2022-08-04  Jonathan Wakely  <jwakely@redhat.com>
1209
1210         * include/std/string_view (basic_string_view(Range&&)): Add
1211         explicit as per P2499R0.
1212         * testsuite/21_strings/basic_string_view/cons/char/range_c++20.cc:
1213         Adjust implicit conversions. Check implicit conversions fail.
1214         * testsuite/21_strings/basic_string_view/cons/wchar_t/range_c++20.cc:
1215         Likewise.
1216
1217 2022-08-04  Jonathan Wakely  <jwakely@redhat.com>
1218
1219         * include/bits/fs_dir.h (directory_iterator): Add comparison
1220         with std::default_sentinel_t. Remove redundant operator!= for
1221         C++20.
1222         * (recursive_directory_iterator): Likewise.
1223         * include/bits/iterator_concepts.h [!__cpp_lib_concepts]
1224         (default_sentinel_t, default_sentinel): Define even if concepts
1225         are not supported.
1226         * include/bits/regex.h (regex_iterator): Add comparison with
1227         std::default_sentinel_t. Remove redundant operator!= for C++20.
1228         (regex_token_iterator): Likewise.
1229         (regex_token_iterator::_M_end_of_seq()): Add noexcept.
1230         * testsuite/27_io/filesystem/iterators/lwg3719.cc: New test.
1231         * testsuite/28_regex/iterators/regex_iterator/lwg3719.cc:
1232         New test.
1233         * testsuite/28_regex/iterators/regex_token_iterator/lwg3719.cc:
1234         New test.
1235
1236 2022-08-04  Jonathan Wakely  <jwakely@redhat.com>
1237
1238         * include/std/expected (unexpected::_M_val): Rename to _M_unex.
1239         (bad_expected_access::_M_val): Likewise.
1240
1241 2022-08-04  Jonathan Wakely  <jwakely@redhat.com>
1242
1243         * include/bits/ios_base.h (__cpp_lib_ios_noreplace): Update
1244         value to 202207L.
1245         * include/std/version (__cpp_lib_ios_noreplace): Likewise.
1246         * testsuite/27_io/basic_ofstream/open/char/noreplace.cc: Check
1247         for new value.
1248         * testsuite/27_io/basic_ofstream/open/wchar_t/noreplace.cc:
1249         Likewise.
1250
1251 2022-08-04  Jonathan Wakely  <jwakely@redhat.com>
1252
1253         PR libstdc++/106183
1254         * include/bits/atomic_wait.h (__waiter_pool_base::_M_notify):
1255         Move increment of _M_ver here.
1256         [!_GLIBCXX_HAVE_PLATFORM_WAIT]: Lock mutex around increment.
1257         Use relaxed memory order and always notify all waiters.
1258         (__waiter_base::_M_do_wait) [!_GLIBCXX_HAVE_PLATFORM_WAIT]:
1259         Check value again after locking mutex.
1260         (__waiter_base::_M_notify): Remove increment of _M_ver.
1261
1262 2022-08-04  Ulrich Drepper  <drepper@gmail.com>
1263
1264         * python/libstdcxx/v6/printers.py (class StdTuplePrinter): Use
1265         zero-based indeces just like std:get takes.
1266
1267 2022-07-29  Jonathan Wakely  <jwakely@redhat.com>
1268
1269         PR libstdc++/104443
1270         * include/bits/stl_iterator.h (common_iterator::operator->):
1271         Change return type to just auto.
1272
1273 2022-07-26  Thomas Rodgers  <trodgers@redhat.com>
1274
1275         * include/bits/atomic_wait.h (__atomic_spin): Merge spin loops.
1276
1277 2022-07-20  Jonathan Wakely  <jwakely@redhat.com>
1278
1279         PR libstdc++/100823
1280         * include/bits/stl_iterator.h (common_iterator): Define
1281         destructor, copy constructor and move constructor as trivial
1282         when the underlying types allow.
1283         * testsuite/24_iterators/common_iterator/100823.cc: Check
1284         triviality of special members.
1285
1286 2022-07-20  Jonathan Wakely  <jwakely@redhat.com>
1287
1288         PR libstdc++/100823
1289         * include/bits/stl_iterator.h (common_iterator): Define move
1290         constructor and move assignment operator.
1291         (common_iterator::_M_assign): New function implementing
1292         assignment.
1293         (common_iterator::operator=): Use _M_assign.
1294         (common_iterator::_S_valueless): New constant.
1295         * testsuite/24_iterators/common_iterator/100823.cc: New test.
1296
1297 2022-07-20  Jonathan Wakely  <jwakely@redhat.com>
1298
1299         * include/bits/stl_iterator.h (common_iterator): Fix incorrect
1300         uses of is_nothrow_assignable_v. Fix inconsistent constraints on
1301         friend declaration. Do not move argument in copy constructor.
1302         * testsuite/24_iterators/common_iterator/1.cc: Check for
1303         noexcept constructibnle/assignable.
1304
1305 2022-07-19  François Dumont  <fdumont@gcc.gnu.org>
1306
1307         * include/debug/debug.h [_GLIBCXX_DEBUG](__glibcxx_requires_string): Define
1308         using _GLIBCXX_DEBUG_PEDASSERT.
1309         [_GLIBCXX_DEBUG](__glibcxx_requires_string_len): Likewise.
1310         * include/debug/macros.h
1311         (__glibcxx_check_string, __glibcxx_check_string_len): Move...
1312         * include/debug/string
1313         (__glibcxx_check_string, __glibcxx_check_string_len): ...here. And define depending
1314         on _GLIBCXX_DEBUG_PEDANTIC no matter if _GLIBCXX_DEBUG is defined.
1315         Add using of std::string find, rfind, find_first_of, find_last_of, find_first_not_of
1316         and find_last_not_of. Remove debug implementations having no debug assertion.
1317         * testsuite/util/testsuite_string.h: New file. Provides __gnu_test::string and
1318         __gnu_test::wtring which definition depends on _GLIBCXX_DEBUG.
1319         * testsuite/21_strings/basic_string/debug/find1_neg.cc: New test case.
1320         * testsuite/21_strings/basic_string/debug/find2_neg.cc: New test case.
1321         * testsuite/21_strings/basic_string/operations/find/char/1.cc:
1322         Include <testsuite_string.h> and use __gnu_test::string.
1323         * testsuite/21_strings/basic_string/operations/find/char/2.cc: Likewise.
1324         * testsuite/21_strings/basic_string/operations/find/char/3.cc: Likewise.
1325         * testsuite/21_strings/basic_string/operations/find/char/4.cc: Likewise.
1326         * testsuite/21_strings/basic_string/operations/find/char/5.cc: Likewise.
1327         * testsuite/21_strings/basic_string/operations/find/char/6.cc: Likewise.
1328         * testsuite/21_strings/basic_string/operations/find/wchar_t/1.cc:
1329         Include <testsuite_string.h> and use __gnu_test::wstring.
1330         * testsuite/21_strings/basic_string/operations/find/wchar_t/2.cc: Likewise.
1331         * testsuite/21_strings/basic_string/operations/find/wchar_t/3.cc: Likewise.
1332         * testsuite/21_strings/basic_string/operations/find/wchar_t/4.cc: Likewise.
1333         * testsuite/21_strings/basic_string/operations/find/wchar_t/5.cc: Likewise.
1334         * testsuite/21_strings/basic_string/operations/find/wchar_t/6.cc: Likewise.
1335
1336 2022-07-19  Jonathan Wakely  <jwakely@redhat.com>
1337
1338         * include/std/type_traits (__cpp_lib_reference_from_temporary)
1339         (reference_constructs_from_temporary)
1340         (reference_converts_from_temporary): Only define when the
1341         built-ins are available.
1342
1343 2022-07-19  Marco Falke  <falke.marco@gmail.com>
1344
1345         * include/std/charconv (__from_chars_alnum_to_val): Replace
1346         implicit conversion from int to unsigned char with explicit
1347         cast.
1348
1349 2022-07-19  Sebastian Huber  <sebastian.huber@embedded-brains.de>
1350
1351         * configure: Regnerate.
1352         * configure.ac (newlib, *-rtems*): Remove HAVE_POLL.
1353
1354 2022-07-18  François Dumont  <fdumont@gcc.gnu.org>
1355
1356         * include/bits/stl_algo.h
1357         (__merge_adaptive): Adapt to merge only when buffer is large enough..
1358         (__merge_adaptive_resize): New, adapt merge when buffer is too small.
1359         (__inplace_merge): Adapt, use latter.
1360         (__stable_sort_adaptive): Adapt to sort only when buffer is large enough.
1361         (__stable_sort_adaptive_resize): New, adapt sort when buffer is too small.
1362         (__stable_sort): Adapt, use latter.
1363
1364 2022-07-15  Marek Polacek  <polacek@redhat.com>
1365
1366         PR c++/104477
1367         * include/std/type_traits (reference_constructs_from_temporary,
1368         reference_converts_from_temporary): New class templates.
1369         (reference_constructs_from_temporary_v,
1370         reference_converts_from_temporary_v): New variable templates.
1371         (__cpp_lib_reference_from_temporary): Define for C++23.
1372         * include/std/version (__cpp_lib_reference_from_temporary): Define for
1373         C++23.
1374         * testsuite/20_util/variable_templates_for_traits.cc: Test
1375         reference_constructs_from_temporary_v and
1376         reference_converts_from_temporary_v.
1377         * testsuite/20_util/reference_from_temporary/value.cc: New test.
1378         * testsuite/20_util/reference_from_temporary/value2.cc: New test.
1379         * testsuite/20_util/reference_from_temporary/version.cc: New test.
1380
1381 2022-07-12  Jonathan Wakely  <jwakely@redhat.com>
1382
1383         PR libstdc++/106248
1384         * include/std/istream [C++17] (operator>>(istream&, char*)):
1385         Set eofbit if we stopped extracting at EOF.
1386         * testsuite/27_io/basic_istream/extractors_character/char/pr106248.cc:
1387         New test.
1388         * testsuite/27_io/basic_istream/extractors_character/wchar_t/pr106248.cc:
1389         New test.
1390
1391 2022-07-12  Jonathan Wakely  <jwakely@redhat.com>
1392
1393         * include/bits/stl_iterator.h (__iter_to_alloc_t): Replace
1394         add_const_t with const-qualifier.
1395         * include/bits/utility.h (tuple_element<N, cv T>): Likewise for
1396         all cv-qualifiers.
1397         * include/std/type_traits (add_const, add_volatile): Replace
1398         typedef-declaration with using-declaration.
1399         (add_cv): Replace add_const and add_volatile with cv-qualifiers.
1400         * include/std/variant (variant_alternative<N, cv T>): Replace
1401         add_const_t, add_volatile_t and add_cv_t etc. with cv-qualifiers.
1402
1403 2022-07-09  François Dumont  <fdumont@gcc.gnu.org>
1404
1405         * include/std/string: Remove obsolete comment about char_traits.h including
1406         stl_algobase.h.
1407
1408 2022-07-07  Jonathan Wakely  <jwakely@redhat.com>
1409
1410         PR c++/89074
1411         * include/bits/char_traits.h (__gnu_cxx::char_traits::move):
1412         Remove workaround for front-end bug.
1413
1414 2022-07-05  Alexandre Oliva  <oliva@adacore.com>
1415
1416         * testsuite/util/testsuite_fs.h (nonexistent_path): Explain
1417         why we need the typecast.
1418
1419 2022-07-05  Alexandre Oliva  <oliva@adacore.com>
1420
1421         * testsuite/util/testsuite_fs.h (nonexistent_path): Convert
1422         the getpid result to an integral type.
1423
1424 2022-07-01  Jonathan Wakely  <jwakely@redhat.com>
1425
1426         PR libstdc++/106162
1427         * include/Makefile.am (largefile-config.h): Add
1428         stamp-${host_alias} prerequisite.
1429         * include/Makefile.in: Regenerate.
1430
1431 2022-07-01  Jonathan Wakely  <jwakely@redhat.com>
1432
1433         * include/bits/fs_ops.h: Add nodiscard to all pure functions.
1434         * include/experimental/bits/fs_ops.h: Likewise.
1435         * testsuite/27_io/filesystem/operations/all.cc: Do not discard
1436         results of absolute and canonical.
1437         * testsuite/27_io/filesystem/operations/absolute.cc: Cast
1438         discarded result to void.
1439         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
1440         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
1441         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
1442         * testsuite/27_io/filesystem/operations/read_symlink.cc:
1443         Likewise.
1444         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
1445         * testsuite/27_io/filesystem/operations/symlink_status.cc:
1446         Likewise.
1447         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
1448         Likewise.
1449         * testsuite/experimental/filesystem/operations/canonical.cc:
1450         Likewise.
1451         * testsuite/experimental/filesystem/operations/exists.cc:
1452         Likewise.
1453         * testsuite/experimental/filesystem/operations/is_empty.cc:
1454         Likewise.
1455         * testsuite/experimental/filesystem/operations/read_symlink.cc:
1456         Likewise.
1457         * testsuite/experimental/filesystem/operations/temp_directory_path.cc:
1458         Likewise.
1459
1460 2022-07-01  Sebastian Huber  <sebastian.huber@embedded-brains.de>
1461
1462         * configure: Regnerate.
1463         * configure.ac (newlib, *-rtems*): Enable TLS support for all RTEMS
1464         targets except bfin, lm32, mips, moxie, or1k, and v850.
1465         For all RTEMS targets, define HAVE_ALIGNED_ALLOC, HAVE_AT_QUICK_EXIT,
1466         HAVE_LINK, HAVE_POLL, HAVE_QUICK_EXIT, HAVE_READLINK, HAVE_SETENV,
1467         HAVE_SLEEP, HAVE_SOCKATMARK, HAVE_STRERROR_L, HAVE_SYMLINK,
1468         HAVE_TRUNCATE, and HAVE_USLEEP.
1469         * crossconfig.m4 (*-rtems*): Remove.
1470
1471 2022-06-30  Jonathan Wakely  <jwakely@redhat.com>
1472
1473         * include/bits/utility.h: Fix comment typos.
1474
1475 2022-06-30  Jonathan Wakely  <jwakely@redhat.com>
1476
1477         * src/c++17/fs_ops.cc (fs::temp_directory_path()): Include path
1478         in exception.
1479         (fs::temp_directory_path(error_code&)): Rearrange to more
1480         closely match the structure of the first overload.
1481         * src/filesystem/ops.cc (fs::temp_directory_path): Likewise.
1482         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
1483         Check that exception contains the path.
1484         * testsuite/experimental/filesystem/operations/temp_directory_path.cc:
1485         Likewise.
1486
1487 2022-06-30  Jonathan Wakely  <jwakely@redhat.com>
1488
1489         PR libstdc++/88881
1490         * src/filesystem/ops.cc (has_trailing_slash): New helper
1491         function.
1492         (fs::status): Strip trailing slashes.
1493         (fs::symlink_status): Likewise.
1494         * testsuite/experimental/filesystem/operations/temp_directory_path.cc:
1495         Clean the environment before each test and use TMP instead of
1496         TMPDIR so the test passes on Windows.
1497
1498 2022-06-28  Jonathan Wakely  <jwakely@redhat.com>
1499
1500         * src/filesystem/dir-common.h (_Dir_base::_At_path):
1501         Use char_type consistently for paths.
1502
1503 2022-06-28  Jonathan Wakely  <jwakely@redhat.com>
1504
1505         * src/c++17/fs_dir.cc (_Dir::dir_and_pathname):: Replace with
1506         current() returning _At_path.
1507         (_Dir::_Dir, _Dir::open_subdir, _Dir::do_unlink): Adjust.
1508         * src/filesystem/dir-common.h (_Dir_base::_At_path): New class.
1509         (_Dir_base::_Dir_Base, _Dir_base::openat): Use _At_path.
1510         * src/filesystem/dir.cc (_Dir::dir_and_pathname): Replace with
1511         current() returning _At_path.
1512         (_Dir::_Dir, _Dir::open_subdir): Adjust.
1513
1514 2022-06-28  Jonathan Wakely  <jwakely@redhat.com>
1515
1516         * src/c++17/fs_dir.cc (_Dir::_Dir) [!_GLIBCXX_HAVE_OPENAT]:
1517         Always store pathname if we don't have openat or unlinkat,
1518         because the full path is needed to open sub-directories and
1519         remove entries.
1520
1521 2022-06-28  Jonathan Wakely  <jwakely@redhat.com>
1522
1523         * testsuite/20_util/from_chars/4.cc: Only use log2 if C99 math
1524         functions are available.
1525
1526 2022-06-27  Alexandre Oliva  <oliva@adacore.com>
1527
1528         * testsuite/20_util/to_chars/long_double.cc: Use cmath
1529         long double overloads for nexttoward and ldexp.
1530
1531 2022-06-27  Alexandre Oliva  <oliva@adacore.com>
1532
1533         * testsuite/experimental/simd/standard_abi_usable.cc: Require
1534         cmath support.
1535         * testsuite/experimental/simd/standard_abi_usable_2.cc:
1536         Likewise.
1537
1538 2022-06-27  Alexandre Oliva  <oliva@adacore.com>
1539
1540         * testsuite/26_numerics/complex/proj.cc: Skip test in the
1541         circumstances in which the implementation of proj is known to
1542         be broken.
1543
1544 2022-06-27  Alexandre Oliva  <oliva@adacore.com>
1545
1546         * src/c++17/fs_dir.cc (dir_and_pathname): Use dirfd if
1547         _GLIBCXX_HAVE_OPENAT.
1548
1549 2022-06-27  Alexandre Oliva  <oliva@adacore.com>
1550
1551         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc
1552         (test06): Don't create symlinks when NO_SYMLINKS is defined.
1553
1554 2022-06-27  Alexandre Oliva  <oliva@adacore.com>
1555
1556         * testsuite/lib/dg-options.exp (add_options_for_net_ts):
1557         Add -Wl,--gc-sections for RTEMS targets.
1558         * testsuite/experimental/net/timer/waitable/dest.cc: Link-time
1559         xfail on RTEMS.
1560         * testsuite/experimental/net/timer/waitable/ops.cc: Likewise.
1561         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
1562         Execution-time xfail on RTEMS.
1563         * testsuite/experimental/net/internet/resolver/ops/reverse.cc:
1564         Likewise.
1565
1566 2022-06-27  Jonathan Wakely  <jwakely@redhat.com>
1567
1568         * testsuite/ext/mt_allocator/22309_thread.cc: Include <string>.
1569
1570 2022-06-27  Joel Brobecker  <brobecker@adacore.com>
1571             Jonathan Wakely  <jwakely@redhat.com>
1572
1573         * testsuite/util/testsuite_fs.h (__gnu_test::nonexistent_path):
1574         Always include a counter in the filename returned.
1575
1576 2022-06-27  Jonathan Wakely  <jwakely@redhat.com>
1577
1578         * include/bits/move_only_function.h (_Never_valueless_alt):
1579         Define partial specialization for std::move_only_function.
1580
1581 2022-06-27  Jonathan Wakely  <jwakely@redhat.com>
1582
1583         * include/std/variant (_Build_FUN::_S_fun): Define fallback case
1584         as deleted.
1585         (__accepted_index, _Extra_visit_slot_needed): Replace class
1586         templates with variable templates.
1587
1588 2022-06-27  Jonathan Wakely  <jwakely@redhat.com>
1589
1590         * include/bits/fs_path.h (__is_path_iter_src): Replace class
1591         template with variable template.
1592
1593 2022-06-27  Jonathan Wakely  <jwakely@redhat.com>
1594
1595         * include/bits/chrono.h (is_clock_v): Define to false.
1596         (is_clock_v<T>): Define partial specialization for true cases.
1597         (is_clock): Define in terms of is_clock_v.
1598
1599 2022-06-24  Xi Ruoyao  <xry111@xry111.site>
1600
1601         * scripts/extract_symvers.in: Use grep -E instead of egrep.
1602         * scripts/run_doxygen: Likewise.
1603
1604 2022-06-24  Alexandre Oliva  <oliva@adacore.com>
1605
1606         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for
1607         openat.
1608         * configure, config.h.in: Rebuilt.
1609         * src/filesystem/dir-common.h (openat): Use ::openat if
1610         _GLIBCXX_HAVE_OPENAT.
1611         * src/filesystem/dir.cc (dir_and_pathname): Use dirfd if
1612         _GLIBCXX_HAVE_OPENAT.
1613
1614 2022-06-24  Alexandre Oliva  <oliva@adacore.com>
1615
1616         * testsuite/27_io/filesystem/operations/rename.cc: xfail on
1617         rtems.
1618         * testsuite/experimental/filesystem/operations/rename.cc:
1619         Likewise.
1620
1621 2022-06-24  Alexandre Oliva  <oliva@adacore.com>
1622
1623         * testsuite/util/testsuite_fs.h (NO_LAST_WRITE_TIME): Define
1624         when appropriate.
1625         * testsuite/lib/libstdc++.exp
1626         (check_v3_target_fs_last_write_time): New.
1627         * testsuite/lib/dg-options.exp (dg-require-target-fs-lwt):
1628         New.
1629         * testsuite/27_io/filesystem/operations/last_write_time.cc:
1630         Skip the test if the features are unavailable.
1631         * testsuite/experimental/filesystem/operations/last_write_time.cc:
1632         Likewise.
1633
1634 2022-06-24  Alexandre Oliva  <oliva@adacore.com>
1635
1636         * testsuite/util/testsuite_fs.h (NO_SPACE): Define if
1637         appropriate.
1638         * testsuite/lib/libstdc++.exp (check_v3_target_fs_space): New.
1639         * testsuite/lib/dg-options.exp (dg-require-target-fs-space):
1640         New.
1641         * testsuite/27_io/filesystem/operations/space.cc: Require
1642         target-fs-space.
1643         * testsuite/experimental/filesystem/operations/space.cc:
1644         Likewise.
1645
1646 2022-06-24  Alexandre Oliva  <oliva@adacore.com>
1647
1648         * testsuite/util/testsuite_fs.h (NO_SYMLINKS): Define on
1649         mingw and when create_symlink is a dummy.
1650         * testsuite/27_io/filesystem/operations/symlink_status.cc:
1651         Drop mingw xfail.
1652         (test01, test02): Don't create symlinks when NO_SYMLINKS is
1653         defined.
1654         * testsuite/27_io/filesystem/operations/canonical.cc (test03):
1655         Likewise.
1656         * testsuite/27_io/filesystem/operations/copy.cc (test02):
1657         Likewise.
1658         * testsuite/27_io/filesystem/operations/create_directories.cc
1659         (test04): Likewise.
1660         * testsuite/27_io/filesystem/operations/create_directory.cc
1661         (test01): Likewise.
1662         * testsuite/27_io/filesystem/operations/permissions.cc
1663         (test03, test04): Likewise.
1664         * testsuite/27_io/filesystem/operations/remove.cc (test01):
1665         Likewise.
1666         * testsuite/27_io/filesystem/operations/remove_all.cc (test01):
1667         Likewise.
1668         * testsuite/27_io/filesystem/operations/rename.cc
1669         (test_symlinks): Likewise.
1670         * testsuite/27_io/filesystem/operations/weakly_canonical.cc
1671         (test01): Likewise.
1672         * testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc
1673         (test06): Likewise.
1674         * testsuite/experimental/filesystem/operations/copy.cc
1675         (test01): Likewise.
1676         * testsuite/experimental/filesystem/operations/create_directories.cc
1677         (test04): Likewise.
1678         * testsuite/experimental/filesystem/operations/create_directory.cc
1679         (test01): Likewise.
1680         * testsuite/experimental/filesystem/operations/permissions.cc
1681         (test03, test04): Likewise.
1682         * testsuite/experimental/filesystem/operations/remove.cc
1683         (test01): Likewise.
1684         * testsuite/experimental/filesystem/operations/remove_all.cc
1685         (test01): Likewise.
1686         * testsuite/experimental/filesystem/operations/rename.cc
1687         (test01): Likewise.
1688         * testsuite/lib/libstdc++.exp
1689         (v3_check_preprocessor_condition): Add optional inc parameter.
1690         Add it to the test program after include bits/c++config.h.
1691         (check_v3_target_fs_symlinks): New.
1692         * testsuite/lib/dg-options.exp
1693         (dg-require-target-fs-symlinks): New.
1694         * testsuite/27_io/filesystem/operations/read_symlink.cc:
1695         Replace mingw xfail with require target-fs-symlinks.
1696         * testsuite/experimental/filesystem/operations/read_symlink.cc:
1697         Likewise.
1698
1699 2022-06-24  Alexandre Oliva  <oliva@adacore.com>
1700
1701         * testsuite/27_io/filesystem/operations/copy.cc (test02):
1702         Select TO after creating FROM.
1703         (test03, test04): Likewise.
1704         * testsuite/experimental/filesystem/operations/copy.cc
1705         (test02, test03, test04): Likewise.
1706
1707 2022-06-24  Alexandre Oliva  <oliva@adacore.com>
1708
1709         * testsuite/30_threads/thread/native_handle/cancel.cc: Add an
1710         explicit cancellation point in case sleep_for lacks one.
1711
1712 2022-06-24  Alexandre Oliva  <oliva@adacore.com>
1713
1714         * testsuite/lib/dg-options.exp (add_options_for_net_ts): Add
1715         -lbsd for RTEMS targets.
1716
1717 2022-06-23  Jonathan Wakely  <jwakely@redhat.com>
1718
1719         * testsuite/27_io/filesystem/iterators/error_reporting.cc: Use
1720         rmdir to remove directories.
1721         * testsuite/experimental/filesystem/iterators/error_reporting.cc:
1722         Likewise.
1723
1724 2022-06-23  Jonathan Wakely  <jwakely@redhat.com>
1725
1726         * testsuite/26_numerics/random/random_device/entropy.cc: Use
1727         numeric_limits<unsigned>::digits.
1728
1729 2022-06-22  Alexandre Oliva  <oliva@adacore.com>
1730
1731         * libsupc++/eh_globals.cc [!_GLIBCXX_HAVE_TLS]
1732         (__eh_globals_init::~__eh_globals_init): Clear _S_init first.
1733
1734 2022-06-22  Alexandre Oliva  <oliva@adacore.com>
1735
1736         * testsuite/30_threads/this_thread/60421.cc (test02): Call
1737         sched_yield.
1738
1739 2022-06-22  Alexandre Oliva  <oliva@adacore.com>
1740
1741         * testsuite/20_util/to_chars/long_double.cc: Require cmath.
1742
1743 2022-06-22  Alexandre Oliva  <oliva@adacore.com>
1744
1745         * testsuite/23_containers/bitset/cons/dr1325-2.cc: Work around
1746         global struct bitset.
1747         * testsuite/23_containers/bitset/ext/15361.cc: Likewise.
1748         * testsuite/23_containers/bitset/input/1.cc: Likewise.
1749         * testsuite/23_containers/bitset/to_string/1.cc: Likewise.
1750         * testsuite/23_containers/bitset/to_string/dr396.cc: Likewise.
1751
1752 2022-06-17  Jonathan Wakely  <jwakely@redhat.com>
1753
1754         * testsuite/21_strings/basic_string/cons/char/105995.cc: Add
1755         missing #include.
1756
1757 2022-06-16  Jonathan Wakely  <jwakely@redhat.com>
1758
1759         PR libstdc++/105995
1760         * include/bits/basic_string.h (_M_use_local_data): Initialize
1761         the entire SSO buffer.
1762         * testsuite/21_strings/basic_string/cons/char/105995.cc: New test.
1763
1764 2022-06-16  Jonathan Wakely  <jwakely@redhat.com>
1765
1766         PR libstdc++/101482
1767         * include/ext/vstring.h (operator==): Always check lengths
1768         before comparing.
1769
1770 2022-06-15  François Dumont  <fdumont@gcc.gnu.org>
1771
1772         PR libstdc++/105717
1773         * include/bits/hashtable_policy.h (_ConvertToValueType): New.
1774         * include/bits/hashtable.h (_Hashtable<>::_M_insert_unique_aux): New.
1775         (_Hashtable<>::_M_insert(_Arg&&, const _NodeGenerator&, true_type)): Use latters.
1776         (_Hashtable<>::_M_insert(_Arg&&, const _NodeGenerator&, false_type)): Likewise.
1777         (_Hashtable(_InputIterator, _InputIterator, size_type, const _Hash&, const _Equal&,
1778         const allocator_type&, true_type)): Use this.insert range.
1779         (_Hashtable(_InputIterator, _InputIterator, size_type, const _Hash&, const _Equal&,
1780         const allocator_type&, false_type)): Use _M_insert.
1781         * testsuite/23_containers/unordered_map/cons/56112.cc: Check how many times conversion
1782         is done.
1783         * testsuite/23_containers/unordered_map/insert/105717.cc: New test.
1784         * testsuite/23_containers/unordered_set/insert/105717.cc: New test.
1785
1786 2022-06-14  Jonathan Wakely  <jwakely@redhat.com>
1787
1788         PR libstdc++/62187
1789         * include/bits/basic_string.h (operator==): Always compare
1790         lengths before checking string contents.
1791         [!__cpp_lib_three_way_comparison] (operator==, operator!=):
1792         Reorder arguments.
1793
1794 2022-06-14  Jonathan Wakely  <jwakely@redhat.com>
1795
1796         PR libstdc++/59048
1797         * include/bits/basic_string.h (compare): Define inline.
1798         * include/bits/basic_string.tcc (compare): Remove out-of-line
1799         definitions.
1800         * include/bits/cow_string.h (compare): Define inline.
1801         * testsuite/21_strings/basic_string/operations/compare/char/3.cc:
1802         New test.
1803
1804 2022-06-14  Jonathan Wakely  <jwakely@redhat.com>
1805
1806         * include/bits/new_allocator.h: Fix indentation.
1807         * include/ext/malloc_allocator.h: Likewise.
1808
1809 2022-06-14  Jonathan Wakely  <jwakely@redhat.com>
1810
1811         PR libstdc++/105957
1812         * include/bits/allocator.h (allocator::allocate): Check for
1813         overflow in constexpr allocation.
1814         * testsuite/20_util/allocator/105975.cc: New test.
1815
1816 2022-06-13  Mark Mentovai  <mark@mentovai.com>
1817
1818         * include/experimental/bits/fs_path.h (__detail::__null_terminated):
1819         Rename to __nul_terminated to avoid colliding with a macro in
1820         Apple's SDK.
1821
1822 2022-06-13  Jonathan Wakely  <jwakely@redhat.com>
1823
1824         * include/std/atomic (__atomic_val_t): Use __type_identity_t
1825         instead of atomic<T>::value_type, as per LWG 3220.
1826         * testsuite/29_atomics/atomic/lwg3220.cc: New test.
1827
1828 2022-06-10  Jonathan Wakely  <jwakely@redhat.com>
1829
1830         PR libstdc++/105844
1831         * include/experimental/numeric (experimental::gcd): Simplify
1832         assertions. Use __abs_r instead of __absu.
1833         (experimental::lcm): Likewise. Remove use of __detail::__lcm so
1834         overflow can be detected.
1835         * include/std/numeric (__detail::__absu): Rename to __abs_r and
1836         change to allow signed result type, so overflow can be detected.
1837         (__detail::__lcm): Remove.
1838         (gcd): Simplify assertions. Use __abs_r instead of __absu.
1839         (lcm): Likewise. Remove use of __detail::__lcm so overflow can
1840         be detected.
1841         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error lines.
1842         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
1843         * testsuite/26_numerics/gcd/105844.cc: New test.
1844         * testsuite/26_numerics/lcm/105844.cc: New test.
1845
1846 2022-06-10  Jonathan Wakely  <jwakely@redhat.com>
1847
1848         PR libstdc++/105880
1849         * libsupc++/eh_globals.cc (eh_globals): Ensure constant init and
1850         prevent destruction during termination.
1851         (__eh_globals_init::_M_init): Replace with static member _S_init.
1852         (__cxxabiv1::__cxa_get_globals_fast): Update.
1853         (__cxxabiv1::__cxa_get_globals): Likewise.
1854
1855 2022-06-10  Jonathan Wakely  <jwakely@redhat.com>
1856
1857         * include/bits/basic_string.h (__hash_str_base): New class
1858         template.
1859         (hash<basic_string<C, char_traits<C>, A>>): Define partial
1860         specialization for each of the standard character types.
1861         (hash<string>, hash<wstring>, hash<u8string>, hash<u16string>)
1862         (hash<u32string>): Remove explicit specializations.
1863         * include/std/string (__hash_string_base): Remove class
1864         template.
1865         (hash<pmr::string>, hash<pmr::wstring>, hash<pmr::u8string>)
1866         (hash<pmr::u16string>, hash<pmr::u32string>): Remove explicit
1867         specializations.
1868         * testsuite/21_strings/basic_string/hash/hash.cc: Test with
1869         custom allocators.
1870         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc:
1871         Likewise.
1872
1873 2022-05-27  Jonathan Wakely  <jwakely@redhat.com>
1874
1875         PR libstdc++/105671
1876         * include/std/sstream (basic_stringbuf::_M_high_mark): Add
1877         always_inline attribute.
1878
1879 2022-05-26  Jonathan Wakely  <jwakely@redhat.com>
1880
1881         PR libstdc++/105681
1882         * include/ext/pb_ds/detail/resize_policy/hash_prime_size_policy_imp.hpp:
1883         Limit ga_sizes array to values that fit in size_t.
1884         * include/ext/random [__SIZE_WIDTH < 32] (sfmt86243)
1885         (sfmt86243_64, sfmt132049, sfmt132049_64, sfmt216091)
1886         (sfmt216091_64): Do not declare.
1887
1888 2022-05-26  Jonathan Wakely  <jwakely@redhat.com>
1889
1890         * python/libstdcxx/v6/printers.py (StdErrorCodePrinter): Make
1891         lookup for ios_errc and future_errc check versioned namespace.
1892         (StdAtomicPrinter): Strip versioned namespace from typename.
1893
1894 2022-05-26  Jonathan Wakely  <jwakely@redhat.com>
1895
1896         * src/c++11/Makefile.am: Add new source file.
1897         * src/c++11/Makefile.in: Regenerate.
1898         * src/c++11/cxx11-ios_failure.cc (iostream_category):
1899         Move to ...
1900         * src/c++11/ios_errcat.cc: New file.
1901         * testsuite/27_io/ios_base/failure/error_code.cc: Check that
1902         std::iostream_category() is defined and used for std::io_errc.
1903
1904 2022-05-26  Jonathan Wakely  <jwakely@redhat.com>
1905
1906         * include/bits/stl_iterator.h (counted_iterator::operator++(int)):
1907         Add 'constexpr' as per LWG 3643.
1908         * testsuite/24_iterators/counted_iterator/lwg3643.cc: New test.
1909
1910 2022-05-26  Jonathan Wakely  <jwakely@redhat.com>
1911
1912         * include/bits/functional_hash.h (__is_fast_hash): Add doxygen
1913         comment.
1914         * include/bits/hashtable.h: Do not include <bits/stl_function.h>
1915         here.
1916         * include/bits/hashtable_policy.h: Include <bits/stl_pair.h> and
1917         <bits/functional_hash.h>.
1918         * include/bits/unordered_map.h: Include required headers.
1919         * include/bits/unordered_set.h: Likewise.
1920         * include/std/unordered_map: Do not include headers for indirect
1921         dependencies.
1922         * include/std/unordered_set: Likewise.
1923
1924 2022-05-26  Jonathan Wakely  <jwakely@redhat.com>
1925
1926         * include/bits/ranges_algobase.h: Do not include
1927         <bits/stl_iterator_base_types.h>.
1928         * include/std/string: Likewise.
1929         * include/std/variant: Likewise.
1930
1931 2022-05-26  Nathan Sidwell  <nathan@acm.org>
1932
1933         * include/bits/hashtable.h: Include required headers.
1934         * include/bits/hashtable_policy.h: Likewise.
1935         * include/bits/stl_heap.h: Likewise.
1936         * include/bits/stl_iterator_base_funcs.h: Likewise.
1937
1938 2022-05-26  François Dumont  <fdumont@gcc.gnu.org>
1939
1940         * python/libstdcxx/v6/printers.py (StdSpanPrinter.__init__):
1941         Strip typename from version namespace.
1942
1943 2022-05-26  Jonathan Wakely  <jwakely@redhat.com>
1944
1945         * python/libstdcxx/v6/printers.py (SharedPointerPrinter): Strip
1946         versioned namespace from the template argument too.
1947
1948 2022-05-26  Jonathan Wakely  <jwakely@redhat.com>
1949
1950         * testsuite/21_strings/basic_string/modifiers/pop_back/char/1.cc:
1951         Moved to...
1952         * testsuite/21_strings/basic_string/modifiers/pop_back/char.cc:
1953         ...here.
1954         * testsuite/21_strings/basic_string/modifiers/pop_back/wchar_t/1.cc:
1955         Moved to...
1956         * testsuite/21_strings/basic_string/modifiers/pop_back/wchar_t.cc:
1957         ...here.
1958         * testsuite/21_strings/basic_string/modifiers/swap/wchar_t/constexpr.cc:
1959         Moved to...
1960         * testsuite/21_strings/basic_string/modifiers/swap/constexpr-wchar_t.cc:
1961         ...here.
1962         * testsuite/21_strings/basic_string/modifiers/swap/char/constexpr.cc:
1963         Moved to...
1964         * testsuite/21_strings/basic_string/modifiers/swap/constexpr.cc:
1965         ...here.
1966         * testsuite/21_strings/basic_string/operations/contains/char/1.cc:
1967         Moved to...
1968         * testsuite/21_strings/basic_string/operations/contains/char.cc:
1969         ...here.
1970         * testsuite/21_strings/basic_string/operations/contains/wchar_t/1.cc:
1971         Moved to...
1972         * testsuite/21_strings/basic_string/operations/contains/wchar_t.cc:
1973         ...here.
1974         * testsuite/21_strings/basic_string/operations/data/char/1.cc:
1975         Moved to...
1976         * testsuite/21_strings/basic_string/operations/data/char.cc:
1977         ...here.
1978         * testsuite/21_strings/basic_string/operations/data/wchar_t/1.cc:
1979         Moved to...
1980         * testsuite/21_strings/basic_string/operations/data/wchar_t.cc:
1981         ...here.
1982         * testsuite/21_strings/basic_string/operations/ends_with/char/1.cc:
1983         Moved to...
1984         * testsuite/21_strings/basic_string/operations/ends_with/char.cc:
1985         ...here.
1986         * testsuite/21_strings/basic_string/operations/ends_with/wchar_t/1.cc:
1987         Moved to...
1988         * testsuite/21_strings/basic_string/operations/ends_with/wchar_t.cc:
1989         ...here.
1990         * testsuite/21_strings/basic_string/operations/starts_with/char/1.cc:
1991         Moved to...
1992         * testsuite/21_strings/basic_string/operations/starts_with/char.cc:
1993         ...here.
1994         * testsuite/21_strings/basic_string/operations/starts_with/wchar_t/1.cc:
1995         Moved to...
1996         * testsuite/21_strings/basic_string/operations/starts_with/wchar_t.cc:
1997         ...here.
1998         * testsuite/21_strings/basic_string/operations/substr/char/1.cc:
1999         Moved to...
2000         * testsuite/21_strings/basic_string/operations/substr/char.cc:
2001         ...here.
2002         * testsuite/21_strings/basic_string/operations/substr/wchar_t/1.cc:
2003         Moved to...
2004         * testsuite/21_strings/basic_string/operations/substr/wchar_t.cc:
2005         ...here.
2006         * testsuite/21_strings/basic_string/range_access/char/1.cc:
2007         Moved to...
2008         * testsuite/21_strings/basic_string/range_access/char.cc:
2009         ...here.
2010         * testsuite/21_strings/basic_string/range_access/wchar_t/1.cc:
2011         Moved to...
2012         * testsuite/21_strings/basic_string/range_access/wchar_t.cc:
2013         ...here.
2014         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/char/1.cc:
2015         Moved to...
2016         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/char.cc:
2017         ...here.
2018         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/wchar_t/1.cc:
2019         Moved to...
2020         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/wchar_t.cc:
2021         ...here.
2022         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/char/1.cc:
2023         Moved to...
2024         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/char.cc:
2025         ...here.
2026         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/wchar_t/1.cc:
2027         Moved to...
2028         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/wchar_t.cc:
2029         ...here.
2030         * testsuite/21_strings/basic_string_view/modifiers/swap/char/1.cc:
2031         Moved to...
2032         * testsuite/21_strings/basic_string_view/modifiers/swap/char.cc:
2033         ...here.
2034         * testsuite/21_strings/basic_string_view/modifiers/swap/wchar_t/1.cc:
2035         Moved to...
2036         * testsuite/21_strings/basic_string_view/modifiers/swap/wchar_t.cc:
2037         ...here.
2038         * testsuite/21_strings/basic_string_view/operations/contains/char/1.cc:
2039         Moved to...
2040         * testsuite/21_strings/basic_string_view/operations/contains/char.cc:
2041         ...here.
2042         * testsuite/21_strings/basic_string_view/operations/contains/wchar_t/1.cc:
2043         Moved to...
2044         * testsuite/21_strings/basic_string_view/operations/contains/wchar_t.cc:
2045         ...here.
2046         * testsuite/21_strings/basic_string_view/operations/data/char/1.cc:
2047         Moved to...
2048         * testsuite/21_strings/basic_string_view/operations/data/char.cc:
2049         ...here.
2050         * testsuite/21_strings/basic_string_view/operations/data/wchar_t/1.cc:
2051         Moved to...
2052         * testsuite/21_strings/basic_string_view/operations/data/wchar_t.cc:
2053         ...here.
2054         * testsuite/21_strings/basic_string_view/operations/ends_with/char/1.cc:
2055         Moved to...
2056         * testsuite/21_strings/basic_string_view/operations/ends_with/char.cc:
2057         ...here.
2058         * testsuite/21_strings/basic_string_view/operations/ends_with/wchar_t/1.cc:
2059         Moved to...
2060         * testsuite/21_strings/basic_string_view/operations/ends_with/wchar_t.cc:
2061         ...here.
2062         * testsuite/21_strings/basic_string_view/operations/starts_with/char/1.cc:
2063         Moved to...
2064         * testsuite/21_strings/basic_string_view/operations/starts_with/char.cc:
2065         ...here.
2066         * testsuite/21_strings/basic_string_view/operations/starts_with/wchar_t/1.cc:
2067         Moved to...
2068         * testsuite/21_strings/basic_string_view/operations/starts_with/wchar_t.cc:
2069         ...here.
2070         * testsuite/21_strings/basic_string_view/operations/substr/char/1.cc:
2071         Moved to...
2072         * testsuite/21_strings/basic_string_view/operations/substr/char.cc:
2073         ...here.
2074         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/1.cc:
2075         Moved to...
2076         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t.cc:
2077         ...here.
2078         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
2079         Moved to...
2080         * testsuite/21_strings/basic_string_view/range_access/char.cc:
2081         ...here.
2082         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
2083         Moved to...
2084         * testsuite/21_strings/basic_string_view/range_access/wchar_t.cc:
2085         ...here.
2086         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char/1.cc:
2087         Moved to...
2088         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char.cc:
2089         ...here.
2090         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char16_t/1.cc:
2091         Moved to...
2092         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char16_t.cc:
2093         ...here.
2094         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char32_t/1.cc:
2095         Moved to...
2096         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char32_t.cc:
2097         ...here.
2098         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char8_t/1.cc:
2099         Moved to...
2100         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char8_t.cc:
2101         ...here.
2102         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/1.cc:
2103         Moved to...
2104         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/int.cc:
2105         ...here.
2106         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/wchar_t/1.cc:
2107         Moved to...
2108         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/wchar_t.cc:
2109         ...here.
2110         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char/1.cc:
2111         Moved to...
2112         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char.cc:
2113         ...here.
2114         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char16_t/1.cc:
2115         Moved to...
2116         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char16_t.cc:
2117         ...here.
2118         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char32_t/1.cc:
2119         Moved to...
2120         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char32_t.cc:
2121         ...here.
2122         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char8_t/1.cc:
2123         Moved to...
2124         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char8_t.cc:
2125         ...here.
2126         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/1.cc:
2127         Moved to...
2128         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/int.cc:
2129         ...here.
2130         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/wchar_t/1.cc:
2131         Moved to...
2132         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/wchar_t.cc:
2133         ...here.
2134         * testsuite/21_strings/char_traits/requirements/explicit_instantiation/char/1.cc:
2135         Moved to...
2136         * testsuite/21_strings/char_traits/requirements/explicit_instantiation/char.cc:
2137         ...here.
2138         * testsuite/21_strings/char_traits/requirements/explicit_instantiation/char16_t/1.cc:
2139         Moved to...
2140         * testsuite/21_strings/char_traits/requirements/explicit_instantiation/char16_t.cc:
2141         ...here.
2142         * testsuite/21_strings/char_traits/requirements/explicit_instantiation/char32_t/1.cc:
2143         Moved to...
2144         * testsuite/21_strings/char_traits/requirements/explicit_instantiation/char32_t.cc:
2145         ...here.
2146         * testsuite/21_strings/char_traits/requirements/explicit_instantiation/char8_t/1.cc:
2147         Moved to...
2148         * testsuite/21_strings/char_traits/requirements/explicit_instantiation/char8_t.cc:
2149         ...here.
2150         * testsuite/21_strings/char_traits/requirements/explicit_instantiation/short/1.cc:
2151         Moved to...
2152         * testsuite/21_strings/char_traits/requirements/explicit_instantiation/short.cc:
2153         ...here.
2154         * testsuite/21_strings/char_traits/requirements/explicit_instantiation/wchar_t/1.cc:
2155         Moved to...
2156         * testsuite/21_strings/char_traits/requirements/explicit_instantiation/wchar_t.cc:
2157         ...here.
2158
2159 2022-05-26  Jonathan Wakely  <jwakely@redhat.com>
2160
2161         * testsuite/20_util/duration/requirements/explicit_instantiation/explicit_instantiation.cc:
2162         Moved to...
2163         * testsuite/20_util/duration/requirements/explicit_instantiation.cc: ...here.
2164         * testsuite/20_util/time_point/requirements/explicit_instantiation/explicit_instantiation.cc:
2165         Moved to...
2166         * testsuite/20_util/time_point/requirements/explicit_instantiation.cc: ...here.
2167         * testsuite/20_util/unique_ptr/requirements/explicit_instantiation/explicit_instantiation.cc:
2168         Moved to...
2169         * testsuite/20_util/unique_ptr/requirements/explicit_instantiation.cc: ...here.
2170
2171 2022-05-25  Jason Merrill  <jason@redhat.com>
2172
2173         * testsuite/20_util/function_objects/constexpr_searcher.cc: Add
2174         constexpr.
2175
2176 2022-05-20  Jonathan Wakely  <jwakely@redhat.com>
2177
2178         * testsuite/26_numerics/random/bernoulli_distribution/operators/values.cc:
2179         Run fewer iterations for simulator targets.
2180         * testsuite/26_numerics/random/binomial_distribution/operators/values.cc:
2181         Likewise.
2182         * testsuite/26_numerics/random/discrete_distribution/operators/values.cc:
2183         Likewise.
2184         * testsuite/26_numerics/random/geometric_distribution/operators/values.cc:
2185         Likewise.
2186         * testsuite/26_numerics/random/negative_binomial_distribution/operators/values.cc:
2187         Likewise.
2188         * testsuite/26_numerics/random/poisson_distribution/operators/values.cc:
2189         Likewise.
2190         * testsuite/26_numerics/random/uniform_int_distribution/operators/values.cc:
2191         Likewise.
2192
2193 2022-05-19  Jonathan Wakely  <jwakely@redhat.com>
2194
2195         * include/bits/char_traits.h: Only include <cstdint> when
2196         necessary.
2197         * include/std/stacktrace: Use __UINTPTR_TYPE__ instead of
2198         uintptr_t.
2199         * src/c++11/cow-stdexcept.cc: Include <stdint.h>.
2200         * src/c++17/floating_to_chars.cc: Likewise.
2201         * testsuite/20_util/assume_aligned/1.cc: Include <cstdint>.
2202         * testsuite/20_util/assume_aligned/3.cc: Likewise.
2203         * testsuite/20_util/shared_ptr/creation/array.cc: Likewise.
2204
2205 2022-05-19  Jonathan Wakely  <jwakely@redhat.com>
2206
2207         * include/bits/basic_string.h: Do not include <ext/atomicity.h>
2208         here.
2209         * include/bits/cow_string.h: Include it here.
2210
2211 2022-05-19  Jonathan Wakely  <jwakely@redhat.com>
2212
2213         * include/Makefile.am: Add new header.
2214         * include/Makefile.in: Regenerate.
2215         * include/bits/memory_resource.h: New file.
2216         * include/std/deque: Include <bits/memory_resource.h>.
2217         * include/std/forward_list: Likewise.
2218         * include/std/list: Likewise.
2219         * include/std/map: Likewise.
2220         * include/std/memory_resource (pmr::memory_resource): Move to
2221         new <bits/memory_resource.h> header.
2222         (pmr::polymorphic_allocator): Likewise.
2223         * include/std/regex: Likewise.
2224         * include/std/set: Likewise.
2225         * include/std/stacktrace: Likewise.
2226         * include/std/string: Likewise.
2227         * include/std/unordered_map: Likewise.
2228         * include/std/unordered_set: Likewise.
2229         * include/std/vector: Likewise.
2230         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc:
2231         Remove <memory_resource> header and check construction.
2232         * testsuite/23_containers/deque/types/pmr_typedefs.cc: Likewise.
2233         * testsuite/23_containers/forward_list/pmr_typedefs.cc:
2234         Likewise.
2235         * testsuite/23_containers/list/pmr_typedefs.cc: Likewise.
2236         * testsuite/23_containers/map/pmr_typedefs.cc: Likewise.
2237         * testsuite/23_containers/multimap/pmr_typedefs.cc: Likewise.
2238         * testsuite/23_containers/multiset/pmr_typedefs.cc: Likewise.
2239         * testsuite/23_containers/set/pmr_typedefs.cc: Likewise.
2240         * testsuite/23_containers/unordered_map/pmr_typedefs.cc:
2241         Likewise.
2242         * testsuite/23_containers/unordered_multimap/pmr_typedefs.cc:
2243         Likewise.
2244         * testsuite/23_containers/unordered_multiset/pmr_typedefs.cc:
2245         Likewise.
2246         * testsuite/23_containers/unordered_set/pmr_typedefs.cc:
2247         Likewise.
2248         * testsuite/23_containers/vector/pmr_typedefs.cc: Likewise.
2249         * testsuite/28_regex/match_results/pmr_typedefs.cc: Likewise.
2250
2251 2022-05-19  Jonathan Wakely  <jwakely@redhat.com>
2252
2253         * include/std/memory_resource (polymorphic_allocator): Add
2254         non-template equality operator, as proposed for LWG 3683.
2255         * testsuite/20_util/polymorphic_allocator/lwg3683.cc: New test.
2256
2257 2022-05-17  Jonathan Wakely  <jwakely@redhat.com>
2258
2259         * src/c++17/memory_resource.cc (set_default_resource): Use
2260         memory_order_acq_rel.
2261         (get_default_resource): Use memory_order_acquire.
2262
2263 2022-05-17  Jonathan Wakely  <jwakely@redhat.com>
2264
2265         * include/std/memory_resource (new_delete_resource): Add
2266         nodiscard, returns_nonnull and const attributes.
2267         (null_memory_resource): Likewise.
2268         (set_default_resource, get_default_resource): Add returns_nonnull
2269         attribute.
2270         (memory_resource::is_equal): Add nodiscard attribute.
2271         (operator==, operator!=): Likewise.
2272
2273 2022-05-17  Jonathan Wakely  <jwakely@redhat.com>
2274
2275         * include/bits/ios_base.h (io_category): Add const and nodiscard
2276         attributes.
2277         (make_error_code, make_error_condition): Add nodiscard.
2278         * include/std/future (future_category): Add const and nodiscard.
2279         (make_error_code, make_error_condition): Add nodiscard.
2280         * include/std/system_error (generic_category system_category):
2281         Add nodiscard. Replace _GLIBCXX_CONST with C++11 attribute.
2282         (error_code::value, error_code::category, error_code::operator bool)
2283         (error_condition::value, error_condition::category)
2284         (error_condition::operator bool, make_error_code)
2285         (make_error_condition, operator==, operator!=, operator<=>): Add
2286         nodiscard.
2287
2288 2022-05-17  Jonathan Wakely  <jwakely@redhat.com>
2289
2290         * testsuite/20_util/expected/synopsis.cc: Skip for versioned
2291         namespace.
2292         * testsuite/27_io/headers/iosfwd/synopsis.cc: Likewise.
2293
2294 2022-05-17  Jonathan Wakely  <jwakely@redhat.com>
2295
2296         * src/Makefile.am [ENABLE_SYMVERS_GNU_NAMESPACE] (cxx11_sources):
2297         Do not build the compatibility*-c++0x.cc objects.
2298         * src/Makefile.in: Regenerate.
2299         * src/c++11/compatibility-c++0x.cc [_GLIBCXX_INLINE_VERSION]:
2300         Refuse to build for the versioned namespace.
2301         * src/c++11/compatibility-chrono.cc: Likewise.
2302         * src/c++11/compatibility-condvar.cc: Likewise.
2303         * src/c++11/compatibility-thread-c++0x.cc: Likewise.
2304         * src/c++11/chrono.cc (system_clock, steady_clock):
2305         Use macros to define in inline namespace _V2, matching the
2306         declarations in <system_error>.
2307         * src/c++11/system_error.cc (system_category, generic_category):
2308         Likewise.
2309
2310 2022-05-16  Jonathan Wakely  <jwakely@redhat.com>
2311
2312         * doc/xml/manual/prerequisites.xml: Fix attributes for external
2313         hyperlink.
2314         * doc/html/manual/setup.html: Regenerate.
2315
2316 2022-05-16  Jonathan Wakely  <jwakely@redhat.com>
2317
2318         * doc/xml/manual/status_cxx2023.xml: Update with gcc-12 support.
2319         * doc/html/*: Regenerate.
2320
2321 2022-05-16  Jonathan Wakely  <jwakely@redhat.com>
2322
2323         * doc/xml/manual/intro.xml: Include new chapter.
2324         * doc/xml/manual/status_cxx2020.xml: Tweak release numbers.
2325         * doc/xml/manual/status_cxx2023.xml: New file.
2326         * doc/html/*: Regenerate.
2327
2328 2022-05-16  Jonathan Wakely  <jwakely@redhat.com>
2329
2330         * doc/html/manual/status.html: Regenerate.
2331         * doc/xml/manual/status_cxx2020.xml: Fix supported version for
2332         C++20 bit operations.
2333
2334 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2335
2336         * include/bits/std_thread.h (thread::_State, thread::_State_ptr):
2337         Declare as private unless _GLIBCXX_THREAD_IMPL is defined.
2338         * src/c++11/thread.cc (_GLIBCXX_THREAD_IMPL): Define.
2339
2340 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2341
2342         * include/std/future (launch): Make operators noexcept.
2343
2344 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2345
2346         * doc/doxygen/user.cfg.in (PREDEFINED): Replace __exception_ptr
2347         with "__unspecified__".
2348         * libsupc++/exception_ptr.h: Improve doxygen docs.
2349         (__exception_ptr::swap): Also declare in namespace std.
2350
2351 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2352
2353         * libsupc++/nested_exception.h (throw_with_nested) [C++17]: Use
2354         if-constexpr instead of tag dispatching.
2355         (rethrow_if_nested) [C++17]: Likewise.
2356         (rethrow_if_nested) [!__cpp_rtti]: Do not use dynamic_cast if it
2357         would require RTTI.
2358         * testsuite/18_support/nested_exception/rethrow_if_nested-term.cc:
2359         New test.
2360
2361 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2362
2363         * doc/doxygen/user.cfg.in (PREDEFINED): Define
2364         _GTHREAD_USE_MUTEX_TIMEDLOCK macro.
2365         * include/bits/std_mutex.h (mutex, lock_guard): Use @since and
2366         @headerfile.
2367         * include/bits/unique_lock.h (unique_lock): Likewise.
2368         * include/std/mutex (recursive_mutex, timed_mutex)
2369         (recursive_timed_mutex, scoped_lock): Likewise.
2370
2371 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2372
2373         * doc/doxygen/user.cfg.in (PREDEFINED): Define
2374         _GLIBCXX23_CONSTEXPR macro.
2375         * include/backward/auto_ptr.h (auto_ptr): Use @deprecated.
2376         * include/bits/unique_ptr.h (default_delete): Use @since and
2377         @headerfile.
2378         * include/std/scoped_allocator: Remove @ingroup from @file
2379         block.
2380
2381 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2382
2383         * include/bits/std_thread.h (thread, thread::id): Improve
2384         doxygen docs.
2385         * include/std/future: Likewise.
2386         * include/std/thread (jthread): Likewise.
2387
2388 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2389
2390         * include/bits/ostream_insert.h: Mark helper functions as
2391         undocumented by Doxygen.
2392         * include/bits/stl_algo.h: Use markdown for formatting and mark
2393         helper functions as undocumented.
2394         * include/bits/stl_numeric.h:  Likewise.
2395         * include/bits/stl_pair.h (pair): Add @headerfile.
2396
2397 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2398
2399         * doc/doxygen/user.cfg.in (PREDEFINED): Define __allocator_base
2400         so that Doxygen shows the right base-class for std::allocator.
2401         * include/bits/alloc_traits.h: Improve doxygen docs.
2402         * include/bits/allocator.h: Likewise.
2403         * include/bits/new_allocator.h: Likewise.
2404         * include/ext/new_allocator.h: Likewise.
2405
2406 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2407
2408         * doc/doxygen/user.cfg.in (PREDEFINED): Define macro
2409         _GLIBCXX_DOXYGEN_ONLY to expand its argument.
2410         * include/bits/c++config (_GLIBCXX_DOXYGEN_ONLY): Define.
2411         * include/bits/regex.h: Improve doxygen docs.
2412         * include/bits/regex_constants.h: Likewise.
2413         * include/bits/regex_error.h: Likewise.
2414
2415 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2416
2417         * include/std/atomic: Suppress doxygen docs for
2418         implementation details.
2419         * include/bits/atomic_base.h: Likewise.
2420         * include/bits/shared_ptr_atomic.h: Use markdown. Fix grouping
2421         so that std::atomic is not added to the pointer abstractions
2422         group.
2423
2424 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2425
2426         * include/std/system_error: Improve doxygen comments.
2427
2428 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2429
2430         * include/bits/ptr_traits.h: Add some doxygen comments.
2431
2432 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2433
2434         * doc/doxygen/user.cfg.in (PREDEFINED): Expand new macros to
2435         nothing.
2436         * include/bits/c++config (_GLIBCXX_BEGIN_INLINE_ABI_NAMESPACE)
2437         (_GLIBCXX_END_INLINE_ABI_NAMESPACE): Define new macros.
2438         * include/bits/algorithmfwd.h (_V2::__rotate): Use new macros
2439         for the namespace.
2440         * include/bits/chrono.h (chrono::_V2::system_clock): Likewise.
2441         * include/bits/stl_algo.h (_V2::__rotate): Likewise.
2442         * include/std/condition_variable (_V2::condition_variable_any):
2443         Likewise.
2444         * include/std/system_error (_V2::error_category): Likewise.
2445
2446 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2447
2448         * include/bits/mofunc_impl.h: Fix doxygen command.
2449
2450 2022-05-13  Jonathan Wakely  <jwakely@redhat.com>
2451
2452         * doc/doxygen/user.cfg.in (GROUP_NESTED_COMPOUNDS): Set to NO.
2453         (CLASS_DIAGRAMS): Remove obsolete option.
2454
2455 2022-05-12  Jonathan Wakely  <jwakely@redhat.com>
2456
2457         * config/locale/dragonfly/numeric_members.cc: Remove whitespace.
2458         * config/locale/gnu/numeric_members.cc: Likewise.
2459         * include/bits/locale_facets_nonio.h: Likewise.
2460         * libsupc++/typeinfo: Likewise.
2461
2462 2022-05-10  Jonathan Wakely  <jwakely@redhat.com>
2463
2464         PR libstdc++/105284
2465         * include/std/iosfwd: Add declarations for <spanstream> class
2466         templates and typedefs.
2467         * include/std/spanstream (basic_spanbuf, basic_ispanstream)
2468         (basic_ospanstream, basic_spanstream): Remove default template
2469         arguments.
2470         * testsuite/27_io/headers/iosfwd/synopsis.cc: Add <spanstream>
2471         declarations.
2472         * testsuite/27_io/headers/iosfwd/types.cc: Check <spanstream>
2473         default arguments.
2474
2475 2022-05-10  Jonathan Wakely  <jwakely@redhat.com>
2476
2477         PR libstdc++/105284
2478         * include/std/iosfwd: Add declarations for <synstream> class
2479         templates and typedefs.
2480         * include/std/syncstream (basic_syncbuf, basic_osyncstream):
2481         Remove default template arguments.
2482         * testsuite/27_io/headers/iosfwd/synopsis.cc: New test.
2483         * testsuite/27_io/headers/iosfwd/types.cc: New test.
2484
2485 2022-05-06  Jonathan Wakely  <jwakely@redhat.com>
2486
2487         * include/bits/random.tcc (operator==): Only check
2488         normal_distribution::_M_saved_available once.
2489         * testsuite/26_numerics/random/normal_distribution/operators/equal.cc:
2490         Check equality after state changes.
2491         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2492         lineno.
2493
2494 2022-05-06  Jonathan Wakely  <jwakely@redhat.com>
2495
2496         PR libstdc++/105502
2497         * include/bits/random.tcc
2498         (operator>>(basic_istream<C,T>&, normal_distribution<R>&)):
2499         Update state when __state_avail is false.
2500         * testsuite/26_numerics/random/normal_distribution/operators/serialize.cc:
2501         Check that deserialized object equals serialized one.
2502
2503 2022-05-06  Alexandre Oliva  <oliva@adacore.com>
2504
2505         * include/experimental/bits/simd.h [__ALTIVEC__]: Require VSX
2506         for double, long long, and 64-bit long intrinsic types.
2507         [__ALTIVEC__] (__intrinsic_type): Mention 128-bit in
2508         preexisting long double diagnostic, adjust no-VSX double
2509         diagnostic to cover 64-bit long double as well.
2510
2511 2022-05-06  Jonathan Wakely  <jwakely@redhat.com>
2512
2513         PR libstdc++/104731
2514         * testsuite/27_io/filesystem/iterators/error_reporting.cc:
2515         Use a trailing char array as storage for dirent::d_name.
2516
2517 2022-05-06  Jonathan Wakely  <jwakely@redhat.com>
2518
2519         * include/std/stacktrace: Do not include <cxxabi.h>.
2520         (__cxa_demangle): Declare.
2521
2522 2022-05-06  Jonathan Wakely  <jwakely@redhat.com>
2523
2524         PR libstdc++/99871
2525         * include/bits/specfun.h: Use visibility attribute on namespace,
2526         instead of pragma push/pop.
2527         * libsupc++/compare: Likewise.
2528         * libsupc++/exception: Likewise.
2529         * libsupc++/exception.h: Likewise.
2530         * libsupc++/exception_ptr.h: Likewise.
2531         * libsupc++/initializer_list: Likewise.
2532         * libsupc++/nested_exception.h: Likewise.
2533
2534 2022-05-06  Jonathan Wakely  <jwakely@redhat.com>
2535
2536         * doc/xml/manual/test.xml: Remove requirement for copyright and
2537         GPL notice in tests.
2538         * doc/html/manual/test.html: Regenerate.
2539
2540 2022-05-05  Jonathan Wakely  <jwakely@redhat.com>
2541
2542         * include/experimental/memory_resource [!__cpp_rtti]
2543         (__resource_adaptor_imp::do_is_equal): Do not use dynamic_cast
2544         when RTTI is disabled.
2545         * testsuite/17_intro/freestanding.cc: Require RTTI.
2546         * testsuite/18_support/exception/38732.cc: Likewise.
2547         * testsuite/18_support/exception_ptr/rethrow_exception.cc:
2548         Likewise.
2549         * testsuite/18_support/nested_exception/68139.cc: Likewise.
2550         * testsuite/18_support/nested_exception/rethrow_if_nested.cc:
2551         Likewise.
2552         * testsuite/18_support/type_info/103240.cc: Likewise.
2553         * testsuite/18_support/type_info/fundamental.cc: Likewise.
2554         * testsuite/18_support/type_info/hash_code.cc: Likewise.
2555         * testsuite/20_util/any/assign/emplace.cc: Likewise.
2556         * testsuite/20_util/any/cons/in_place.cc: Likewise.
2557         * testsuite/20_util/any/misc/any_cast.cc: Likewise.
2558         * testsuite/20_util/any/observers/type.cc: Likewise.
2559         * testsuite/20_util/function/1.cc: Likewise.
2560         * testsuite/20_util/function/2.cc: Likewise.
2561         * testsuite/20_util/function/3.cc: Likewise.
2562         * testsuite/20_util/function/4.cc: Likewise.
2563         * testsuite/20_util/function/5.cc: Likewise.
2564         * testsuite/20_util/function/6.cc: Likewise.
2565         * testsuite/20_util/function/7.cc: Likewise.
2566         * testsuite/20_util/function/8.cc: Likewise.
2567         * testsuite/20_util/polymorphic_allocator/resource.cc: Likewise.
2568         * testsuite/20_util/shared_ptr/casts/1.cc: Likewise.
2569         * testsuite/20_util/shared_ptr/casts/rval.cc: Likewise.
2570         * testsuite/20_util/shared_ptr/cons/unique_ptr_deleter_ref_2.cc:
2571         Likewise.
2572         * testsuite/20_util/shared_ptr/misc/get_deleter.cc: Likewise.
2573         * testsuite/20_util/typeindex/comparison_operators.cc: Likewise.
2574         * testsuite/20_util/typeindex/comparison_operators_c++20.cc:
2575         Likewise.
2576         * testsuite/20_util/typeindex/hash.cc: Likewise.
2577         * testsuite/20_util/typeindex/hash_code.cc: Likewise.
2578         * testsuite/20_util/typeindex/name.cc: Likewise.
2579         * testsuite/22_locale/ctype/is/string/89728_neg.cc: Likewise.
2580         * testsuite/22_locale/global_templates/standard_facet_hierarchies.cc:
2581         Likewise.
2582         * testsuite/22_locale/global_templates/user_facet_hierarchies.cc:
2583         Likewise.
2584         * testsuite/22_locale/locale/13630.cc: Check type without using
2585         RTTI.
2586         * testsuite/23_containers/array/requirements/non_default_constructible.cc:
2587         Require RTTI.
2588         * testsuite/27_io/basic_ostream/emit/1.cc: Likewise.
2589         * testsuite/27_io/fpos/14320-1.cc: Check type without using RTTI.
2590         * testsuite/27_io/fpos/mbstate_t/12065.cc: Require RTTI.
2591         * testsuite/27_io/ios_base/failure/dual_abi.cc: Likewise.
2592         * testsuite/experimental/any/misc/any_cast.cc: Likewise.
2593         * testsuite/experimental/any/observers/type.cc: Likewise.
2594         * testsuite/experimental/memory_resource/resource_adaptor.cc:
2595         Likewise.
2596         * testsuite/lib/libstdc++.exp (check_effective_target_rtti):
2597         Define new proc.
2598         * testsuite/tr1/3_function_objects/function/1.cc: Likewise.
2599         * testsuite/tr1/3_function_objects/function/2.cc: Likewise.
2600         * testsuite/tr1/3_function_objects/function/3.cc: Likewise.
2601         * testsuite/tr1/3_function_objects/function/4.cc: Likewise.
2602         * testsuite/tr1/3_function_objects/function/5.cc: Likewise.
2603         * testsuite/tr1/3_function_objects/function/6.cc: Likewise.
2604         * testsuite/tr1/3_function_objects/function/7.cc: Likewise.
2605         * testsuite/tr1/3_function_objects/function/8.cc: Likewise.
2606         * testsuite/tr2/bases/value.cc: Likewise.
2607         * testsuite/tr2/direct_bases/value.cc: Likewise.
2608         * testsuite/util/exception/safety.h [!__cpp_rtti]: Don't print
2609         types without RTTI.
2610
2611 2022-05-04  Jonathan Wakely  <jwakely@redhat.com>
2612
2613         PR libstdc++/104719
2614         * include/std/array (array::size(), array::max_size())
2615         (array::empty(), array::data()): Add  always_inline attribute.
2616
2617 2022-05-04  Jonathan Wakely  <jwakely@redhat.com>
2618
2619         PR libstdc++/104719
2620         * include/std/array (__array_traits::_S_ref): Remove.
2621         (__array_traits::_S_ptr): Remove.
2622         (__array_traits<T, 0>::_Type): Define operator[] and operator T*
2623         to provide an array-like API.
2624         (array::_AT_Type): Remove public typeef.
2625         (array::operator[], array::at, array::front, array::back): Use
2626         index operator to access _M_elems instead of _S_ref.
2627         (array::data): Use implicit conversion from _M_elems to pointer.
2628         (swap(array&, array&)): Use __enable_if_t helper.
2629         (get<I>): Use index operator to access _M_elems.
2630         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
2631         Adjust dg-error line numbers.
2632
2633 2022-05-03  Alexandre Oliva  <oliva@adacore.com>
2634
2635         PR c++/105324
2636         * testsuite/20_util/from_chars/pr105324.cc: Guard test body
2637         with conditional for floating-point overloads of from_char.
2638
2639 2022-05-02  Patrick Palka  <ppalka@redhat.com>
2640
2641         PR libstdc++/103911
2642         * src/c++17/floating_from_chars.cc (find_end_of_float): Accept
2643         two delimeters for the exponent part in the form of a possibly
2644         NULL string of length two.  Don't use std::tolower.
2645         (pattern): Adjust calls to find_end_of_float accordingly.
2646
2647 2022-05-02  Patrick Palka  <ppalka@redhat.com>
2648
2649         PR libstdc++/105441
2650         * src/c++17/floating_from_chars.cc (__floating_from_chars_hex):
2651         Also accept 'P' as the start of the exponent.
2652         * testsuite/20_util/from_chars/7.cc: Add corresponding testcase.
2653
2654 2022-04-29  Jonathan Wakely  <jwakely@redhat.com>
2655
2656         PR libstdc++/105417
2657         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt:
2658         Regenerate.
2659         * src/c++11/compatibility-ldbl-alt128.cc [_GLIBCXX_USE_DUAL_ABI]:
2660         Define __gnu_ieee128::num_get<C>::_M_extract_int[abi:cxx11]<I>
2661         symbols as aliases for corresponding symbols without abi-tag.
2662
2663 2022-04-29  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
2664
2665         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
2666         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
2667         Likewise.
2668         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
2669         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
2670         Likewise.
2671
2672 2022-04-28  Jonathan Wakely  <jwakely@redhat.com>
2673
2674         PR libstdc++/99290
2675         * src/c++17/fs_ops.cc (fs::copy): Pass error_code to
2676         directory_iterator constructor, and check on each iteration.
2677         * src/filesystem/ops.cc (fs::copy): Likewise.
2678         * testsuite/27_io/filesystem/operations/copy.cc: Check for
2679         errors during recursion.
2680         * testsuite/experimental/filesystem/operations/copy.cc:
2681         Likewise.
2682
2683 2022-04-28  François Dumont  <fdumont@gcc.gnu.org>
2684
2685         * config/abi/pre/gnu-versioned-namespace.ver: Remove
2686         std::random_device::* pattern.
2687
2688 2022-04-27  Jakub Jelinek  <jakub@redhat.com>
2689
2690         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
2691         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
2692         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
2693         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
2694         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
2695         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
2696         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
2697         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
2698
2699 2022-04-27  Jonathan Wakely  <jwakely@redhat.com>
2700
2701         * python/libstdcxx/v6/printers.py (SharedPointerPrinter): Add
2702         support for atomic<shared_ptr<T>> and atomic<weak_ptr<T>>.
2703         (StdAtomicPrinter): New printer.
2704         (build_libstdcxx_dictionary): Register new printer.
2705         * testsuite/libstdc++-prettyprinters/cxx11.cc: Test std::atomic.
2706         * testsuite/libstdc++-prettyprinters/cxx20.cc: Test atomic smart
2707         pointers.
2708
2709 2022-04-26  Jonathan Wakely  <jwakely@redhat.com>
2710
2711         * include/bits/shared_ptr_atomic.h (atomic<shared_ptr>): Add
2712         constructor for constant initialization from nullptr_t.
2713         * testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc:
2714         Check for new constructor.
2715
2716 2022-04-26  Jonathan Wakely  <jwakely@redhat.com>
2717
2718         * include/bits/fs_path.h (hash<filesystem::path>): Define.
2719         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc:
2720         Check std::hash specialization.
2721
2722 2022-04-25  Jonathan Wakely  <jwakely@redhat.com>
2723
2724         * include/bits/ptr_traits.h (__cpp_lib_constexpr_memory): Define
2725         conditionally.
2726         * include/bits/unique_ptr.h (__cpp_lib_constexpr_memory):
2727         Define for C++23.
2728         (default_delete, default_delete<T[]>, __uniq_ptr_impl)
2729         (unique_ptr, unique_ptr<T[], D>): Add constexpr to all member
2730         functions.
2731         * include/std/version (__cpp_lib_constexpr_memory): Define new
2732         value for C++23.
2733         * testsuite/20_util/unique_ptr/assign/constexpr.cc: New test.
2734         * testsuite/20_util/unique_ptr/comparison/constexpr.cc: New test.
2735         * testsuite/20_util/unique_ptr/cons/constexpr_c++20.cc: New test.
2736         * testsuite/20_util/unique_ptr/creation/constexpr.cc: New test.
2737         * testsuite/20_util/unique_ptr/modifiers/constexpr.cc: New test.
2738         * testsuite/20_util/unique_ptr/specialized_algorithms/constexpr.cc:
2739         New test.
2740
2741 2022-04-25  Jonathan Wakely  <jwakely@redhat.com>
2742
2743         PR libstdc++/105375
2744         * include/std/future (packaged_task): Add deduction guides.
2745         * testsuite/30_threads/packaged_task/cons/deduction.cc: New test.
2746
2747 2022-04-25  Philipp Fent  <fent@in.tum.de>
2748
2749         * python/libstdcxx/v6/printers.py (StdSpanPrinter._iterator):
2750         Rename as iterator.
2751         (StdInitializerListPrinter): Define new printer.
2752         (build_libstdcxx_dictionary): Register new printer.
2753         * testsuite/libstdc++-prettyprinters/cxx11.cc: Check printer for
2754         initializer_list.
2755
2756 2022-04-22  Thomas W Rodgers  <trodgers@redhat.com>
2757
2758         PR libstdc++/102994
2759         * include/bits/atomic_base.h (atomic_flag::notify_one,
2760         notify_all): Remove const qualification.
2761         (__atomic_base::notify_one, notify_all): Likewise.
2762         * include/std/atomic (atomic<bool>::notify_one, notify_all):
2763         Likewise.
2764         (atomic::notify_one, notify_all): Likewise.
2765         (atomic<T*>::notify_one, notify_all): Likewise.
2766         (atomic_notify_one, atomic_notify_all): Likewise.
2767         * testsuite/29_atomics/atomic/wait_notify/102994.cc: Adjust test
2768         to account for change in notify_one/notify_all signature.
2769
2770 2022-04-21  Patrick Palka  <ppalka@redhat.com>
2771
2772         * include/std/charconv (__from_chars_alnum_to_val_table):
2773         Simplify initialization of __lower/__upper_letters.
2774         (__from_chars_alnum_to_val): Default the template parameter to
2775         false.
2776         * src/c++17/floating_from_chars.cc (starts_with_ci): Don't
2777         assume the uppercase and lowercase letters are contiguous.
2778         (__floating_from_chars_hex): Likewise.
2779
2780 2022-04-21  Patrick Palka  <ppalka@redhat.com>
2781
2782         PR c++/105297
2783         PR c++/105322
2784         * include/std/charconv (__from_chars_alnum_to_val): Make
2785         initializer for __table dependent in an artificial way.
2786
2787 2022-04-21  Jonathan Wakely  <jwakely@redhat.com>
2788
2789         PR libstdc++/105324
2790         * src/c++17/floating_from_chars.cc (buffer_resource::do_allocate):
2791         Remove assertion.
2792         * testsuite/20_util/from_chars/pr105324.cc: New test.
2793
2794 2022-04-20  Jonathan Wakely  <jwakely@redhat.com>
2795
2796         * testsuite/21_strings/basic_string_view/operations/copy/char/constexpr.cc:
2797         Check correct feature test macro.
2798
2799 2022-04-20  Jonathan Wakely  <jwakely@redhat.com>
2800
2801         PR libstdc++/93602
2802         * doc/xml/manual/prerequisites.xml: Document libiconv
2803         workarounds.
2804         * doc/html/manual/setup.html: Regenerate.
2805         * src/Makefile.am (CXXLINK): Add $(LTLIBICONV).
2806         * src/Makefile.in: Regenerate.
2807
2808 2022-04-19  Patrick Palka  <ppalka@redhat.com>
2809
2810         * src/c++17/floating_to_chars.cc (_GLIBCXX_ASSERTIONS): Don't
2811         define.
2812         (__floating_to_chars_shortest): Add __builtin_unreachable calls to
2813         squelch false-positive -Wmaybe-uninitialized and -Wreturn-type
2814         warnings.
2815         (__floating_to_chars_precision): Likewise.
2816
2817 2022-04-19  Philipp Fent  <fent@in.tum.de>
2818
2819         * python/libstdcxx/v6/printers.py (StdSpanPrinter): Define.
2820         * testsuite/libstdc++-prettyprinters/cxx20.cc: Test it.
2821
2822 2022-04-19  Jonathan Wakely  <jwakely@redhat.com>
2823
2824         * acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): Fix shell operators.
2825         * configure: Regenerate.
2826
2827 2022-04-18  Patrick Palka  <ppalka@redhat.com>
2828
2829         * include/std/charconv (__from_chars_pow2_base): Manually
2830         unroll the first iteration of the main loop and simplify
2831         accordingly.
2832
2833 2022-04-15  Patrick Palka  <ppalka@redhat.com>
2834
2835         PR libstdc++/104858
2836         * include/bits/ranges_algo.h (__minmax_fn): Avoid dereferencing
2837         __first twice at the start.
2838         * testsuite/25_algorithms/minmax/constrained.cc (test06): New test.
2839
2840 2022-04-15  Patrick Palka  <ppalka@redhat.com>
2841
2842         * include/std/charconv (__from_chars_alnum_to_val_table): Define.
2843         (__from_chars_alnum_to_val): Define.
2844         (__from_chars_binary): Rename to ...
2845         (__from_chars_pow2_base): ... this.  Generalize to handle any
2846         power-of-two base using __from_chars_alnum_to_val.
2847         (__from_chars_digit): Optimize digit recognition to a single
2848         test instead of two tests.  Use [[__unlikely___]] attribute.
2849         (__from_chars_alpha_to_num): Remove.
2850         (__from_chars_alnum): Use __from_chars_alnum_to_val.  Use a
2851         nested loop for the overflow case.  Maintain a lower bound
2852         on the number of available bits in the result and use it to
2853         omit the overflow check.
2854         (from_chars): Adjust appropriately.
2855         * src/c++17/floating_from_chars.cc (ascii_to_hexit): Remove.
2856         (__floating_from_chars_hex): Use __from_chars_alnum_to_val
2857         to recognize a hex digit instead.
2858
2859 2022-04-14  Palmer Dabbelt  <palmer@rivosinc.com>
2860
2861         * acinclude.m4 (GLIBCXX_ENABLE_LOCK_POLICY): Force auto to mutex
2862         for RISC-V.
2863         * configure: Regenerate.
2864
2865 2022-04-14  Jonathan Wakely  <jwakely@redhat.com>
2866
2867         * doc/xml/manual/intro.xml: Fix comment.
2868
2869 2022-04-14  Jonathan Wakely  <jwakely@redhat.com>
2870
2871         * include/precompiled/stdc++.h: Include <stacktrace> and
2872         <stdatomic.h> for C++23.
2873
2874 2022-04-14  Jonathan Wakely  <jwakely@redhat.com>
2875
2876         PR libstdc++/105269
2877         * include/bits/stl_vector.h (__cpp_lib_constexpr_vector):
2878         Define.
2879         * include/c_compatibility/stdatomic.h (__cpp_lib_stdatomic_h):
2880         Define.
2881         * include/std/optional (__cpp_lib_optional): Define new value
2882         for C++23.
2883         (__cpp_lib_monadic_optional): Remove.
2884         * include/std/version (__cpp_lib_constexpr_vector): Define.
2885         (__cpp_lib_stdatomic_h): Define.
2886         (__cpp_lib_optional): Define new value for C++23.
2887         (__cpp_lib_monadic_optional): Remove.
2888         * testsuite/20_util/optional/monadic/and_then.cc: Adjust.
2889         * testsuite/20_util/optional/requirements.cc: Adjust for C++23.
2890         * testsuite/20_util/optional/version.cc: Likewise.
2891         * testsuite/23_containers/vector/cons/constexpr.cc: Check
2892         feature test macro.
2893         * testsuite/29_atomics/headers/stdatomic.h/c_compat.cc:
2894         Likewise.
2895         * testsuite/20_util/optional/monadic/version.cc: Removed.
2896         * testsuite/23_containers/vector/requirements/version.cc: New test.
2897         * testsuite/29_atomics/headers/stdatomic.h/version.cc: New test.
2898
2899 2022-04-12  Jonathan Wakely  <jwakely@redhat.com>
2900
2901         * acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): Check for mmap.
2902         * config.h.in: Regenerate.
2903         * configure: Regenerate.
2904
2905 2022-04-12  Jonathan Wakely  <jwakely@redhat.com>
2906
2907         * include/std/stacktrace (basic_stacktrace::current): Reallocate
2908         a smaller container if the unused capacity is larger than the
2909         used size.
2910
2911 2022-04-12  Jonathan Wakely  <jwakely@redhat.com>
2912
2913         * include/std/stacktrace (basic_stacktrace): Use _Impl::_M_clone
2914         or _Impl::_M_assign to initialize elements in allocated storage.
2915         (basic_stacktrace::_M_clear()): Use _Impl::_M_resize instead of
2916         _Impl::_M_destroy.
2917         (basic_stacktrace::_Impl::_M_destroy()): Replace with ...
2918         (basic_stacktrace::_Impl::_M_resize(size_type, allocator&)): New
2919         function.
2920         (basic_stacktrace::_Impl::_M_push_back): Use _M_xclone. Construct
2921         new element using allocator.
2922         (basic_stacktrace::_Impl::_M_clone): New function.
2923         (basic_stacktrace::_Impl::_M_xclone): New function.
2924         (basic_stacktrace::_Impl::_M_assign): New function.
2925
2926 2022-04-12  Jonathan Wakely  <jwakely@redhat.com>
2927
2928         * include/std/stacktrace (basic_stacktrace::_Impl::_M_allocate):
2929         Use nothrow new instead of try block for std::allocator.
2930         (basic_stacktrace::_Impl::_M_deallocate): Use delete for
2931         std::allocator.
2932
2933 2022-04-12  Jonathan Wakely  <jwakely@redhat.com>
2934
2935         * include/std/stacktrace (basic_stacktrace::current): Replace
2936         calls to _M_reserve and _S_curr_cb with call to _M_prepare.
2937         Check return value of backtrace_simple when max depth given.
2938         (basic_stacktrace::_M_reserve): Remove.
2939         (basic_stacktrace::_S_curr_cb): Remove.
2940         (basic_stacktrace::_M_prepare(size_type)): New function to
2941         reserve initial capacity and return callback.
2942         (basic_stacktrace::_Impl::_M_allocate): Remove check for 0 < n
2943         and remove redundant zeroing of _M_frames and _M_capacity.
2944         (basic_stacktrace::_Impl::_M_push_back): Add [[unlikely]]
2945         attribute. Assign _Impl instead of swapping.
2946         * testsuite/19_diagnostics/stacktrace/current.cc: New test.
2947
2948 2022-04-11  Jonathan Wakely  <jwakely@redhat.com>
2949
2950         * include/std/stacktrace (basic_stacktrace::_Impl::_M_allocate):
2951         Change [[unlikely]] attribute to [[likely]].
2952
2953 2022-04-11  Jonathan Wakely  <jwakely@redhat.com>
2954
2955         PR libstdc++/105031
2956         * include/std/stacktrace (basic_stacktrace::basic_stacktrace):
2957         Fix allocator usage in constructors.
2958         (basic_stacktrace::operator=(const basic_stacktrace&)): Do not
2959         try to reallocate using const allocator.
2960         (basic_stacktrace::operator=(basic_stacktrace&&)): Fix
2961         if-constexpr with non-constant condition. Do not allocate new
2962         storage if allocator propagates. Do not set _M_size if
2963         allocation fails.
2964         (basic_stacktrace::swap(basic_stacktrace&)): Fix typo. Add
2965         assertion that non-propagating allocators are equal.
2966         * testsuite/19_diagnostics/stacktrace/stacktrace.cc: New test.
2967
2968 2022-04-11  Jonathan Wakely  <jwakely@redhat.com>
2969
2970         * include/std/stacktrace (basic_stacktrace::current): Duplicate
2971         implementation into each overload. Add noinline attribute and
2972         skip current frame.
2973         (basic_stacktrace::max_size()): Call _Impl::_S_max_size.
2974         (basic_stacktrace::_S_curr_cb()): New function defining lambda.
2975         (basic_stacktrace::_Impl::_S_max_size): New function defining
2976         maximum size in terms of allocator and size_type.
2977         (basic_stacktrace::_Impl::_M_allocate): Check against
2978         max_size().
2979         * testsuite/19_diagnostics/stacktrace/entry.cc: Call function
2980         for non-constexpr checks. Check line number is correct.
2981
2982 2022-04-11  Jonathan Wakely  <jwakely@redhat.com>
2983
2984         * testsuite/20_util/stacktrace/entry.cc: Moved to...
2985         * testsuite/19_diagnostics/stacktrace/entry.cc: ...here.
2986         * testsuite/20_util/stacktrace/synopsis.cc: Moved to...
2987         * testsuite/19_diagnostics/stacktrace/synopsis.cc: ...here.
2988         * testsuite/20_util/stacktrace/version.cc: Moved to...
2989         * testsuite/19_diagnostics/stacktrace/version.cc: ...here.
2990
2991 2022-04-11  Jonathan Wakely  <jwakely@redhat.com>
2992
2993         * include/experimental/bits/fs_path.h (path): Define special
2994         members after path::_Cmpt is complete.
2995
2996 2022-04-08  Jonathan Wakely  <jwakely@redhat.com>
2997
2998         PR libstdc++/105153
2999         * include/std/expected
3000         (expected<void,E>::expected(expected<U,G>&&)): Fix constraints.
3001         * testsuite/20_util/expected/cons.cc: Check constructor.
3002
3003 2022-04-08  Jonathan Wakely  <jwakely@redhat.com>
3004
3005         PR libstdc++/105154
3006         * include/std/expected (expected<void, E>::swap): Set
3007         _M_has_value to false for objects that previously had a value.
3008         * testsuite/20_util/expected/swap.cc: Fix test to check void
3009         specialization.
3010
3011 2022-04-08  Jonathan Wakely  <jwakely@redhat.com>
3012
3013         PR libstdc++/105146
3014         * include/std/expected (bad_expected_access): Move constructor
3015         parameter.
3016         * testsuite/20_util/expected/bad.cc: New test.
3017
3018 2022-04-07  Hans-Peter Nilsson  <hp@axis.com>
3019
3020         * testsuite/20_util/expected/requirements.cc: Correct minimal-size
3021         test.
3022
3023 2022-04-02  Jakub Jelinek  <jakub@redhat.com>
3024
3025         PR libstdc++/105128
3026         * include/std/source_location (std::source_location::__impl): Move
3027         definition before using __builtin_ret_type.
3028
3029 2022-04-01  Jonathan Wakely  <jwakely@redhat.com>
3030
3031         * include/std/utility (unreachable): Define for C++23.
3032         * include/std/version (__cpp_lib_unreachable): Define.
3033         * src/c++11/debug.cc (__glibcxx_assert_fail): Check for valid
3034         arguments. Handle only the function being given.
3035         * testsuite/20_util/unreachable/1.cc: New test.
3036         * testsuite/20_util/unreachable/version.cc: New test.
3037
3038 2022-04-01  Jonathan Wakely  <jwakely@redhat.com>
3039
3040         * include/experimental/bits/fs_fwd.h (copy_file): Remove
3041         incorrect noexcept from declaration.
3042         * include/experimental/bits/fs_path.h (path::begin, path::end):
3043         Add noexcept to declarations, to match definitions.
3044
3045 2022-04-01  Timm Bäder  <tbaeder@redhat.com>
3046
3047         * include/bits/fs_ops.h: Fix filename in Doxygen comment.
3048         * include/experimental/bits/fs_ops.h: Likewise.
3049
3050 2022-03-31  Jonathan Wakely  <jwakely@redhat.com>
3051
3052         * libsupc++/new_opa.cc (aligned_alloc): Add comment.
3053
3054 2022-03-29  Jonathan Wakely  <jwakely@redhat.com>
3055
3056         * testsuite/18_support/exception/38732.cc: Disable for C++23.
3057         * testsuite/18_support/headers/exception/synopsis.cc: Likewise.
3058         * testsuite/18_support/unexpected_handler.cc: Likewise.
3059
3060 2022-03-29  Jonathan Wakely  <jwakely@redhat.com>
3061
3062         * libsupc++/compare (_Strong_order) [!__cpp_using_enum]: Add
3063         static data members for _Fp_fmt enumerators.
3064
3065 2022-03-29  Jonathan Wakely  <jwakely@redhat.com>
3066
3067         * include/std/version (__cpp_lib_variant): Fix conditions to
3068         match <variant>.
3069         (__cpp_lib_expected): Fix condition to match <expected>.
3070
3071 2022-03-28  Jonathan Wakely  <jwakely@redhat.com>
3072
3073         * testsuite/20_util/optional/monadic/and_then.cc: Fix typo.
3074         * testsuite/20_util/optional/monadic/transform.cc: Likewise.
3075         * testsuite/22_locale/codecvt/always_noconv/char/1.cc: Likewise.
3076         * testsuite/22_locale/codecvt/encoding/char/1.cc: Likewise.
3077         * testsuite/22_locale/codecvt/in/char/1.cc: Likewise.
3078         * testsuite/22_locale/codecvt/max_length/char/1.cc: Likewise.
3079         * testsuite/22_locale/codecvt/out/char/1.cc: Likewise.
3080         * testsuite/22_locale/codecvt/unshift/char/1.cc: Likewise.
3081
3082 2022-03-27  Jonathan Wakely  <jwakely@redhat.com>
3083
3084         * doc/doxygen/user.cfg.in: Add new header.
3085         * include/Makefile.am: Likewise.
3086         * include/Makefile.in: Regenerate.
3087         * include/precompiled/stdc++.h: Add new header.
3088         * include/std/version (__cpp_lib_expected): Define.
3089         * libsupc++/exception [__cplusplus > 202002] (unexpected)
3090         (unexpected_handler, set_unexpected): Do not declare for C++23.
3091         * include/std/expected: New file.
3092         * testsuite/20_util/expected/assign.cc: New test.
3093         * testsuite/20_util/expected/cons.cc: New test.
3094         * testsuite/20_util/expected/illformed_neg.cc: New test.
3095         * testsuite/20_util/expected/observers.cc: New test.
3096         * testsuite/20_util/expected/requirements.cc: New test.
3097         * testsuite/20_util/expected/swap.cc: New test.
3098         * testsuite/20_util/expected/synopsis.cc: New test.
3099         * testsuite/20_util/expected/unexpected.cc: New test.
3100         * testsuite/20_util/expected/version.cc: New test.
3101
3102 2022-03-25  Jonathan Wakely  <jwakely@redhat.com>
3103
3104         * include/std/bit (bit_cast, byteswap, endian): Add doxygen
3105         comments.
3106
3107 2022-03-23  Jonathan Wakely  <jwakely@redhat.com>
3108
3109         PR libstdc++/105027
3110         * include/std/bit (bit_cast): Add constraints.
3111         * testsuite/26_numerics/bit/bit.cast/105027.cc: New test.
3112
3113 2022-03-23  Jonathan Wakely  <jwakely@redhat.com>
3114
3115         * include/std/version [!_GLIBCXX_HOSTED]
3116         (__cpp_lib_hardware_interference_size): Define for freestanding.
3117         (__cpp_lib_bit_cast): Likewise.
3118         (__cpp_lib_is_layout_compatible): Likewise.
3119         (__cpp_lib_is_pointer_interconvertible): Likewise.
3120         (__cpp_lib_adaptor_iterator_pair_constructor): Do not define for
3121         freestanding.
3122         (__cpp_lib_invoke_r): Likewise.
3123         (__cpp_lib_ios_noreplace): Likewise.
3124         (__cpp_lib_monadic_optional): Likewise.
3125         (__cpp_lib_move_only_function): Likewise.
3126         (__cpp_lib_spanstream): Likewise.
3127         (__cpp_lib_stacktrace): Likewise.
3128         (__cpp_lib_string_contains): Likewise.
3129         (__cpp_lib_string_resize_and_overwrite): Likewise.
3130         (__cpp_lib_to_underlying): Likewise.
3131
3132 2022-03-23  Jonathan Wakely  <jwakely@redhat.com>
3133
3134         PR libstdc++/105021
3135         * include/bits/atomic_base.h [!_GLIBCXX_HOSTED]: Do not include
3136         <bits/atomic_wait.h> for freestanding.
3137
3138 2022-03-22  Hans-Peter Nilsson  <hp@axis.com>
3139
3140         * testsuite/20_util/from_chars/6.cc (test01) [FE_DOWNWARD]:
3141         Conditionalize call to fesetround.
3142
3143 2022-03-21  Jakub Jelinek  <jakub@redhat.com>
3144
3145         PR libstdc++/104990
3146         * include/bits/locale_facets_nonio.tcc (get): Don't check if do_get
3147         isn't overloaded if __clang__ is defined.
3148
3149 2022-03-18  Jonathan Wakely  <jwakely@redhat.com>
3150
3151         PR libstdc++/104242
3152         * include/std/any (any(T&&)): Revert change to constraints.
3153         * testsuite/20_util/any/cons/104242.cc: New test.
3154
3155 2022-03-18  Jonathan Wakely  <jwakely@redhat.com>
3156
3157         PR libstdc++/92546
3158         * include/pstl/glue_algorithm_defs.h: Replace <functional> with
3159         <bits/stl_pair.h>.
3160         * include/pstl/utils.h: Replace <iterator> with <type_traits>.
3161         (__pstl::__internal::__except_handler): Use std::__terminate
3162         instead of std::terminate.
3163         * src/c++17/fs_path.cc: Include <array>.
3164         * testsuite/25_algorithms/adjacent_find/constexpr.cc: Include
3165         <functional>.
3166         * testsuite/25_algorithms/binary_search/constexpr.cc: Likewise.
3167         * testsuite/25_algorithms/clamp/constrained.cc: Likewise.
3168         * testsuite/25_algorithms/equal/constrained.cc: Likewise.
3169         * testsuite/25_algorithms/for_each/constrained.cc: Likewise.
3170         * testsuite/25_algorithms/includes/constrained.cc: Likewise.
3171         * testsuite/25_algorithms/is_heap/constexpr.cc: Likewise.
3172         * testsuite/25_algorithms/is_heap_until/constexpr.cc: Likewise.
3173         * testsuite/25_algorithms/is_permutation/constrained.cc: Include
3174         <iterator>.
3175         * testsuite/25_algorithms/is_sorted/constexpr.cc: Include
3176         <functional>.
3177         * testsuite/25_algorithms/is_sorted_until/constexpr.cc:
3178         Likewise.
3179         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc:
3180         Likewise.
3181         * testsuite/25_algorithms/lexicographical_compare/constrained.cc:
3182         Likewise.
3183         * testsuite/25_algorithms/lexicographical_compare_three_way/1.cc:
3184         Include <array>.
3185         * testsuite/25_algorithms/lower_bound/constexpr.cc: Include
3186         <functional>.
3187         * testsuite/25_algorithms/max/constrained.cc: Likewise.
3188         * testsuite/25_algorithms/max_element/constrained.cc: Likewise.
3189         * testsuite/25_algorithms/min/constrained.cc: Likewise.
3190         * testsuite/25_algorithms/min_element/constrained.cc: Likewise.
3191         * testsuite/25_algorithms/minmax_element/constrained.cc:
3192         Likewise.
3193         * testsuite/25_algorithms/mismatch/constexpr.cc: Likewise.
3194         * testsuite/25_algorithms/move/93872.cc: Likewise.
3195         * testsuite/25_algorithms/move_backward/93872.cc: Include
3196         <iterator>.
3197         * testsuite/25_algorithms/nth_element/constexpr.cc: Include
3198         <functional>.
3199         * testsuite/25_algorithms/partial_sort/constexpr.cc: Likewise.
3200         * testsuite/25_algorithms/partial_sort_copy/constexpr.cc:
3201         Likewise.
3202         * testsuite/25_algorithms/search/constexpr.cc: Likewise.
3203         * testsuite/25_algorithms/search_n/constrained.cc: Likewise.
3204         * testsuite/25_algorithms/set_difference/constexpr.cc: Likewise.
3205         * testsuite/25_algorithms/set_difference/constrained.cc:
3206         Likewise.
3207         * testsuite/25_algorithms/set_intersection/constexpr.cc:
3208         Likewise.
3209         * testsuite/25_algorithms/set_intersection/constrained.cc:
3210         Likewise.
3211         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc:
3212         Likewise.
3213         * testsuite/25_algorithms/set_union/constexpr.cc: Likewise.
3214         * testsuite/25_algorithms/set_union/constrained.cc: Likewise.
3215         * testsuite/25_algorithms/sort/constexpr.cc: Likewise.
3216         * testsuite/25_algorithms/sort_heap/constexpr.cc: Likewise.
3217         * testsuite/25_algorithms/transform/constrained.cc: Likewise.
3218         * testsuite/25_algorithms/unique/constexpr.cc: Likewise.
3219         * testsuite/25_algorithms/unique/constrained.cc: Likewise.
3220         * testsuite/25_algorithms/unique_copy/constexpr.cc: Likewise.
3221         * testsuite/25_algorithms/upper_bound/constexpr.cc: Likewise.
3222         * testsuite/std/ranges/adaptors/elements.cc: Include <vector>.
3223         * testsuite/std/ranges/adaptors/lazy_split.cc: Likewise.
3224         * testsuite/std/ranges/adaptors/split.cc: Likewise.
3225
3226 2022-03-17  Jonathan Wakely  <jwakely@redhat.com>
3227
3228         PR libstdc++/92546
3229         * include/bits/fs_path.h (path::make_preferred): Use
3230         handwritten loop instead of std::replace.
3231
3232 2022-03-17  Jonathan Wakely  <jwakely@redhat.com>
3233
3234         PR middle-end/104966
3235         * include/bits/locale_facets_nonio.tcc
3236         (__moneypunct_cache::_M_cache): Replace try-catch with RAII and
3237         make all string copies before any stores to *this.
3238
3239 2022-03-17  Jonathan Wakely  <jwakely@redhat.com>
3240
3241         * testsuite/util/testsuite_character.h: Fix comment.
3242
3243 2022-03-16  Jonathan Wakely  <jwakely@redhat.com>
3244
3245         PR libstdc++/103407
3246         * config/abi/pre/gnu.ver: Make version for std::from_chars
3247         depend on HAVE_USELOCALE macro.
3248         * testsuite/util/testsuite_abi.cc (compare_symbols): Treat
3249         std::from_chars for floating-point types as undesignated if
3250         not found in the baseline symbols file.
3251
3252 2022-03-16  Jonathan Wakely  <jwakely@redhat.com>
3253
3254         * include/std/charconv (__cpp_lib_to_chars): Only define when
3255         both from_chars and to_chars are supported for floating-point
3256         types.
3257         (from_chars, to_chars): Adjust preprocessor conditions guarding
3258         declarations.
3259         * include/std/version (__cpp_lib_to_chars): Adjust condition to
3260         match <charconv> definition.
3261         * src/c++17/floating_from_chars.cc (from_chars_strtod): New
3262         function template.
3263         (from_chars): Simplify preprocessor checks and use
3264         from_chars_strtod when appropriate.
3265
3266 2022-03-14  Jonathan Wakely  <jwakely@redhat.com>
3267
3268         PR libstdc++/104875
3269         * src/c++11/codecvt.cc (read_utf8_code_point): Use char32_t to
3270         hold octets that will be left-shifted.
3271
3272 2022-03-10  Jonathan Wakely  <jwakely@redhat.com>
3273
3274         PR libstdc++/104870
3275         * src/c++17/floating_from_chars.cc: Check __SIZE_WIDTH__ >= 32
3276         before using fast_float.
3277
3278 2022-03-10  Detlef Vollmann  <dv@vollmann.ch>
3279
3280         PR libstdc++/104866
3281         * include/bits/this_thread_sleep.h: Fix order of #endif and
3282         closing brace of namespace.
3283
3284 2022-03-10  Jonathan Wakely  <jwakely@redhat.com>
3285
3286         * libsupc++/compare (_Strong_order::_S_fp_cmp) [__vax__]:
3287         Handle NaN.
3288
3289 2022-03-10  Jonathan Wakely  <jwakely@redhat.com>
3290
3291         * libsupc++/compare (_Strong_ordering::_S_fp_cmp) [__vax__]: Use
3292         <=> comparison.
3293
3294 2022-03-09  Patrick Palka  <ppalka@redhat.com>
3295
3296         PR libstdc++/104859
3297         * src/c++17/floating_to_chars.cc (__floating_to_chars_hex):
3298         Be explicit when narrowing the shifted effective_mantissa,
3299         since it may have an integer-class type.
3300
3301 2022-03-08  Jonathan Wakely  <jwakely@redhat.com>
3302
3303         * include/bits/uses_allocator_args.h: Remove incorrect copyright
3304         notice.
3305
3306 2022-03-07  Jonathan Wakely  <jwakely@redhat.com>
3307
3308         PR libstdc++/104807
3309         * include/bits/c++config (__terminate, __glibcxx_assert_fail):
3310         Replace _GLIBCXX_VISIBILITY on function with visibility pragma.
3311         (__is_constant_evaluated): Add visibility pragma.
3312
3313 2022-03-07  Rasmus Villemoes  <rasmus.villemoes@prevas.dk>
3314
3315         * config/locale/vxworks/ctype_members.cc: Remove <iostream>
3316           include.
3317
3318 2022-03-05  Jonathan Wakely  <jwakely@redhat.com>
3319
3320         * include/bits/c++config (__glibcxx_assert_fail): Add visibility
3321         attribute.
3322         (__terminate): Likewise.
3323
3324 2022-03-04  Jonathan Wakely  <jwakely@redhat.com>
3325
3326         * libsupc++/compare (strong_order::_S_fp_cmp): Move typedef
3327         inside #if condition.
3328
3329 2022-03-03  Jonathan Wakely  <jwakely@redhat.com>
3330
3331         PR libstdc++/104748
3332         * testsuite/std/ranges/adaptors/all.cc: Use non-debug vector for
3333         constexpr test.
3334
3335 2022-03-03  Jonathan Wakely  <jwakely@redhat.com>
3336
3337         * testsuite/17_intro/names.cc (func): Undef on AIX.
3338
3339 2022-03-03  Jonathan Wakely  <jwakely@redhat.com>
3340
3341         PR libstdc++/96526
3342         * libsupc++/compare (strong_order): Add missing support for
3343         floating-point types.
3344         * testsuite/18_support/comparisons/algorithms/strong_order_floats.cc:
3345         New test.
3346
3347 2022-03-01  Jonathan Wakely  <jwakely@redhat.com>
3348
3349         PR middle-end/103984
3350         * include/bits/regex_compiler.h (_BracketMatcher::_M_char): Use
3351         default member initializer.
3352
3353 2022-02-24  Jonathan Wakely  <jwakely@redhat.com>
3354
3355         PR libstdc++/104602
3356         * include/std/source_location (source_location::current): Use
3357         deduced type of __builtin_source_location().
3358
3359 2022-02-22  Patrick Palka  <ppalka@redhat.com>
3360
3361         * include/bits/ranges_base.h (__detail::__is_initializer_list):
3362         Define.
3363         (viewable_range): Adjust as per P2415R2.
3364         * include/bits/ranges_cmp.h (__cpp_lib_ranges): Adjust value.
3365         * include/std/ranges (owning_view): Define as per P2415R2.
3366         (enable_borrowed_range<owning_view>): Likewise.
3367         (views::__detail::__can_subrange): Replace with ...
3368         (views::__detail::__can_owning_view): ... this.
3369         (views::_All::_S_noexcept): Sync with operator().
3370         (views::_All::operator()): Use owning_view instead of subrange
3371         as per P2415R2.
3372         * include/std/version (__cpp_lib_ranges): Adjust value.
3373         * testsuite/std/ranges/adaptors/all.cc (test06): Adjust now that
3374         views::all uses owning_view instead of subrange.
3375         (test08): New test.
3376         * testsuite/std/ranges/adaptors/lazy_split.cc (test09): Adjust
3377         now that rvalue non-view non-borrowed ranges are viewable.
3378         * testsuite/std/ranges/adaptors/split.cc (test06): Likewise.
3379
3380 2022-02-17  Jonathan Wakely  <jwakely@redhat.com>
3381
3382         PR libstdc++/104559
3383         * doc/xml/manual/evolution.xml: Document deprecation.
3384         * doc/html/manual/api.html: Regenerate.
3385         * include/bits/stl_bvector.h (insert(const_iterator, const bool&)):
3386         Remove default argument.
3387         (insert(const_iterator)): New overload with deprecated attribute.
3388         * testsuite/23_containers/vector/bool/modifiers/insert/104559.cc:
3389         New test.
3390
3391 2022-02-17  Jonathan Wakely  <jwakely@redhat.com>
3392
3393         * python/libstdcxx/v6/printers.py (StdErrorCodePrinter): Replace
3394         code that call cat->name() on std::error_category objects.
3395         Identify known categories by symbol name and use a hardcoded
3396         name. Print error code values as enumerators where appopriate.
3397         * testsuite/libstdc++-prettyprinters/cxx11.cc: Adjust expected
3398         name of custom category. Check io_errc and future_errc errors.
3399
3400 2022-02-15  Jonathan Wakely  <jwakely@redhat.com>
3401
3402         PR libstdc++/104542
3403         * include/bits/uses_allocator_args.h (make_obj_using_allocator)
3404         (uninitialized_construct_using_allocator): Add constexpr.
3405         * testsuite/20_util/uses_allocator/make_obj.cc: Check constexpr.
3406         * testsuite/20_util/uses_allocator/uninitialized_construct.cc: New test.
3407
3408 2022-02-14  Jonathan Wakely  <jwakely@redhat.com>
3409
3410         PR libstdc++/100912
3411         * config/locale/gnu/c_locale.h (__convert_from_v): Use inline
3412         namespace for IEEE128 long double mode.
3413         * config/os/gnu-linux/ldbl-ieee128-extra.ver: Add new symbol
3414         version and export __gnu_cxx_ieee128::__convert_from_v.
3415         * include/bits/locale_facets_nonio.tcc (money_put::__do_put):
3416         Make __ibm128 overload use snprintf directly
3417         * testsuite/util/testsuite_abi.cc: Add new symbol version.
3418         Remove stable IEEE128/LDBL versions.
3419
3420 2022-02-14  Jonathan Wakely  <jwakely@redhat.com>
3421
3422         PR libstdc++/103891
3423         * include/bits/c++config (_GLIBCXX_HAVE_COND_TRIVIAL_SPECIAL_MEMBERS):
3424         Remove.
3425         * include/std/variant: Check feature test macros instead.
3426         * include/std/version: Likewise.
3427
3428 2022-02-14  Jonathan Wakely  <jwakely@redhat.com>
3429
3430         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
3431         Fix typo.
3432
3433 2022-02-14  Jonathan Wakely  <jwakely@redhat.com>
3434
3435         * src/c++17/floating_to_chars.cc (FLOAT128_TO_CHARS): Depend on
3436         LONG_DOUBLE_ALT128_COMPAT instead of USE_FLOAT128.
3437
3438 2022-02-11  Jonathan Wakely  <jwakely@redhat.com>
3439
3440         * testsuite/20_util/temporary_buffer.cc: Fix dg-warning target
3441         selector.
3442
3443 2022-02-11  Jonathan Wakely  <jwakely@redhat.com>
3444
3445         * testsuite/20_util/monotonic_buffer_resource/allocate.cc:
3446         Ignore -Walloc-larger-than warning.
3447         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
3448         Likewise.
3449         * testsuite/29_atomics/atomic/cons/user_pod.cc: Compile with -O1
3450         to avoid linker error for __atomic_is_lock_free.
3451
3452 2022-02-10  Thomas Rodgers  <rodgert@appliantology.com>
3453
3454         * include/bits/atomic_wait.h (__waiter_base::_S_do_spin,
3455         __waiter_base::_S_do_spin_v): Change memory order from relaxed
3456         to acquire.
3457
3458 2022-02-10  Jonathan Wakely  <jwakely@redhat.com>
3459
3460         * include/c_compatibility/stdatomic.h (atomic_fetch_xor): Add
3461         using-declaration.
3462         (atomic_fetch_xor_explicit): Likewise.
3463         * testsuite/29_atomics/headers/stdatomic.h/c_compat.cc: Check
3464         arithmetic and logical operations for atomic_int.
3465
3466 2022-02-10  Jonathan Wakely  <jwakely@redhat.com>
3467
3468         * src/filesystem/dir-common.h (_GLIBCXX_HAVE_DIRFD): Undefine
3469         when <dirent.h> is not available.
3470         (_GLIBCXX_HAVE_UNLINKAT):  Likewise.
3471
3472 2022-02-09  Thomas Rodgers  <rodgert@appliantology.com>
3473
3474         PR libstdc++/104442
3475         * include/bits/atomic_wait.h (__waiter::_M_do_wait_v): Move spin
3476          loop inside do loop so that threads failing the wait, reload
3477          _M_ver.
3478
3479 2022-02-08  Jonathan Wakely  <jwakely@redhat.com>
3480
3481         * src/c++17/fs_dir.cc (_Dir(DIR*, const path&)): Change first
3482         parameter to _Dir_base&&.
3483         * src/filesystem/dir-common.h (_Dir_base(DIR*)): Remove.
3484         * src/filesystem/dir.cc (_Dir(DIR*, const path&)): Change first
3485         parameter to _Dir_base&&.
3486
3487 2022-02-08  Jonathan Wakely  <jwakely@redhat.com>
3488
3489         * acinclude.m4 (GLIBCXX_ENABLE_LOCK_POLICY): Add comment about
3490         checking for CAS on correct word size.
3491
3492 2022-02-08  Jonathan Wakely  <jwakely@redhat.com>
3493
3494         * testsuite/experimental/filesystem/operations/create_directories.cc:
3495         Adjust expected results for Windows.
3496
3497 2022-02-08  Jonathan Wakely  <jwakely@redhat.com>
3498
3499         PR libstdc++/104161
3500         * src/c++17/fs_dir.cc (fs::recursive_directory_iterator::__erase):
3501         [i_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Refresh entry._M_type member,
3502         instead of checking for errno values indicating a directory.
3503         * src/c++17/fs_ops.cc (fs::remove_all(const path&)): Use similar
3504         logic to non-throwing overload.
3505         (fs::remove_all(const path&, error_code&)): Add comments.
3506         * src/filesystem/ops-common.h: Likewise.
3507
3508 2022-02-04  Jonathan Wakely  <jwakely@redhat.com>
3509
3510         * src/filesystem/dir-common.h (_Dir_base::openat): Change return
3511         type to use portable posix::DIR alias.
3512
3513 2022-02-04  Jonathan Wakely  <jwakely@redhat.com>
3514
3515         * include/c_compatibility/stdatomic.h [__clang__]: Use
3516         #include_next <stdatomic.h>.
3517
3518 2022-02-04  Jonathan Wakely  <jwakely@redhat.com>
3519
3520         * include/experimental/bits/fs_ops.h (fs::copy_file): Remove
3521         noexcept.
3522         (fs::create_directories): Likewise.
3523         (fs::remove_all): Likewise.
3524         * src/filesystem/ops.cc (fs::copy_file): Remove noexcept.
3525         (fs::create_directories): Likewise.
3526         (fs::remove_all): Likewise.
3527
3528 2022-02-04  Jonathan Wakely  <jwakely@redhat.com>
3529
3530         PR libstdc++/104161
3531         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for dirfd
3532         and unlinkat.
3533         * config.h.in: Regenerate.
3534         * configure: Regenerate.
3535         * include/bits/fs_dir.h (recursive_directory_iterator): Declare
3536         remove_all overloads as friends.
3537         (recursive_directory_iterator::__erase): Declare new member
3538         function.
3539         * include/bits/fs_fwd.h (remove, remove_all): Declare.
3540         * src/c++17/fs_dir.cc (_Dir): Add filename_only parameter to
3541         constructor. Pass file descriptor argument to base constructor.
3542         (_Dir::dir_and_pathname, _Dir::open_subdir, _Dir::do_unlink)
3543         (_Dir::unlink, _Dir::rmdir): Define new member functions.
3544         (directory_iterator): Pass filename_only argument to _Dir
3545         constructor.
3546         (recursive_directory_iterator::_Dir_stack): Adjust constructor
3547         parameters to take a _Dir rvalue instead of creating one.
3548         (_Dir_stack::orig): Add data member for storing original path.
3549         (_Dir_stack::report_error): Define new member function.
3550         (__directory_iterator_nofollow): Move here from dir-common.h and
3551         fix value to be a power of two.
3552         (__directory_iterator_filename_only): Define new constant.
3553         (recursive_directory_iterator): Construct _Dir object and move
3554         into _M_dirs stack. Pass skip_permission_denied argument to first
3555         advance call.
3556         (recursive_directory_iterator::increment): Use _Dir::open_subdir.
3557         (recursive_directory_iterator::__erase): Define new member
3558         function.
3559         * src/c++17/fs_ops.cc (ErrorReporter, do_remove_all): Remove.
3560         (fs::remove_all): Use new recursive_directory_iterator::__erase
3561         member function.
3562         * src/filesystem/dir-common.h (_Dir_base): Add int parameter to
3563         constructor and use openat to implement nofollow semantics.
3564         (_Dir_base::fdcwd, _Dir_base::set_close_on_exec, _Dir_base::openat):
3565         Define new member functions.
3566         (__directory_iterator_nofollow): Move to fs_dir.cc.
3567         * src/filesystem/dir.cc (_Dir): Pass file descriptor argument to
3568         base constructor.
3569         (_Dir::dir_and_pathname, _Dir::open_subdir): Define new member
3570         functions.
3571         (recursive_directory_iterator::_Dir_stack): Adjust constructor
3572         parameters to take a _Dir rvalue instead of creating one.
3573         (recursive_directory_iterator): Check for new nofollow option.
3574         Construct _Dir object and move into _M_dirs stack. Pass
3575         skip_permission_denied argument to first advance call.
3576         (recursive_directory_iterator::increment): Use _Dir::open_subdir.
3577         * src/filesystem/ops.cc (fs::remove_all): Use C++17 remove_all.
3578
3579 2022-02-04  Jonathan Wakely  <jwakely@redhat.com>
3580
3581         * include/bits/allocator.h: Qualify std::allocator_traits in
3582         deprecated warnings.
3583         * libsupc++/exception (uncaught_exception): Add suggestion to
3584         deprecated warning.
3585
3586 2022-02-02  Jonathan Wakely  <jwakely@redhat.com>
3587
3588         * src/c++17/fs_dir.cc (fs::recursive_directory_iterator::pop):
3589         Add [[maybe_unused]] attribute.
3590         * src/filesystem/dir.cc (fs::recursive_directory_iterator::pop):
3591         Likewise.
3592
3593 2022-02-02  Jonathan Wakely  <jwakely@redhat.com>
3594
3595         * testsuite/23_containers/multiset/operators/cmp_c++20.cc: Use
3596         custom comparison function for multiset.
3597         * testsuite/23_containers/set/operators/cmp_c++20.cc: Use custom
3598         comparison function for set.
3599
3600 2022-02-02  Jonathan Wakely  <jwakely@redhat.com>
3601
3602         * include/bits/boost_concept_check.h (_OutputIteratorConcept):
3603         Change member function to data member of function pointer type.
3604
3605 2022-02-02  Martin Sebor  <msebor@redhat.com>
3606
3607         PR libstdc++/101831
3608         * include/std/array (begin): Declare const member function attribute
3609         const.
3610         (end, rbegin, rend, size, max_size, empty, data): Same.
3611         * testsuite/23_containers/array/capacity/empty.cc: Add test cases.
3612         * testsuite/23_containers/array/capacity/max_size.cc: Same.
3613         * testsuite/23_containers/array/capacity/size.cc: Same.
3614         * testsuite/23_containers/array/iterators/begin_end.cc: New test.
3615
3616 2022-02-02  Jonathan Wakely  <jwakely@redhat.com>
3617
3618         * testsuite/27_io/filesystem/iterators/error_reporting.cc: Use
3619         autoconf macro to check whether d_type is present.
3620         * testsuite/experimental/filesystem/iterators/error_reporting.cc:
3621         Likewise.
3622
3623 2022-02-01  Jonathan Wakely  <jwakely@redhat.com>
3624
3625         * testsuite/27_io/filesystem/iterators/97731.cc: New test.
3626         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
3627         Check follow_directory_symlink option.
3628         * testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc:
3629         Likewise.
3630
3631 2022-02-01  Jonathan Wakely  <jwakely@redhat.com>
3632
3633         * src/c++17/fs_dir.cc (recursive_directory_iterator::increment):
3634         Reset state to past-the-end iterator on error.
3635         (fs::recursive_directory_iterator::pop(error_code&)): Likewise.
3636         (fs::recursive_directory_iterator::pop()): Check _M_dirs before
3637         it might get reset.
3638         * src/filesystem/dir.cc (recursive_directory_iterator): Likewise,
3639         for the TS implementation.
3640         * testsuite/27_io/filesystem/iterators/error_reporting.cc: New test.
3641         * testsuite/experimental/filesystem/iterators/error_reporting.cc: New test.
3642
3643 2022-02-01  Jonathan Wakely  <jwakely@redhat.com>
3644
3645         * include/bits/fs_fwd.h (filesystem::perms): Fix comment.
3646
3647 2022-02-01  Jonathan Wakely  <jwakely@redhat.com>
3648
3649         PR libstdc++/104301
3650         * acinclude.m4 (GLIBCXX_ENABLE_CSTDIO): Print different messages
3651         for stdio_pure and stdio_posix options.
3652         * configure: Regenerate.
3653
3654 2022-02-01  Thomas Rodgers  <rodgert@appliantology.com>
3655
3656         * include/bits/atomic_wait.h: Change memory order from
3657         Acquire/Release with relaxed loads to SeqCst+Release for
3658         accesses to the waiter's count.
3659
3660 2022-01-31  Martin Liska  <mliska@suse.cz>
3661
3662         * acinclude.m4: Detect *_ld_is_mold and use it.
3663         * configure: Regenerate.
3664
3665 2022-01-30  Hans-Peter Nilsson  <hp@axis.com>
3666
3667         * testsuite/27_io/basic_istream/get/char/lwg3464.cc: Don't run on
3668         simulator targets.
3669         * testsuite/27_io/basic_istream/get/wchar_t/lwg3464.cc: Likewise.
3670
3671 2022-01-27  Jonathan Wakely  <jwakely@redhat.com>
3672
3673         PR libstdc++/100516
3674         * include/bits/deque.tcc (_M_range_initialize<ForwardIterator>):
3675         Add __builtin_unreachable to loop.
3676         * testsuite/23_containers/deque/100516.cc: New test.
3677
3678 2022-01-27  Jonathan Wakely  <jwakely@redhat.com>
3679
3680         * include/bits/ranges_base.h (ranges::advance): Avoid signed
3681         overflow. Do nothing if already equal to desired result.
3682         * testsuite/24_iterators/range_operations/advance_overflow.cc:
3683         New test.
3684
3685 2022-01-27  Martin Liska  <mliska@suse.cz>
3686
3687         PR libstdc++/104259
3688         * acinclude.m4: Fix typo.
3689         * configure: Regenerate.
3690
3691 2022-01-25  Jonathan Wakely  <jwakely@redhat.com>
3692
3693         PR libstdc++/104019
3694         * include/bits/istream.tcc (basic_istream::sentry): Add braces
3695         around try-block.
3696         * include/bits/shared_ptr_base.h (_Sp_counted_array_base::_M_init):
3697         Add pragmas to disable bogus warnings from PR 61596.
3698
3699 2022-01-25  Jonathan Wakely  <jwakely@redhat.com>
3700
3701         PR libstdc++/104217
3702         * src/c++17/fs_ops.cc (_GNU_SOURCE): Define.
3703         * src/filesystem/dir.cc (_GNU_SOURCE): Define.
3704         * src/filesystem/ops.cc (_GNU_SOURCE): Define.
3705
3706 2022-01-25  Jonathan Wakely  <jwakely@redhat.com>
3707
3708         PR libstdc++/104161
3709         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for
3710         fdopendir.
3711         * config.h.in: Regenerate.
3712         * configure: Regenerate.
3713         * src/c++17/fs_dir.cc (_Dir): Add nofollow flag to constructor
3714         and pass it to base class constructor.
3715         (directory_iterator): Pass nofollow flag to _Dir constructor.
3716         (fs::recursive_directory_iterator::increment): Likewise.
3717         * src/c++17/fs_ops.cc (do_remove_all): Use nofollow option for
3718         directory_iterator constructor. Move error check outside loop.
3719         * src/filesystem/dir-common.h (_Dir_base): Add nofollow flag to
3720         constructor and when it's set use ::open with O_NOFOLLOW and
3721         O_DIRECTORY.
3722         * src/filesystem/dir.cc (_Dir): Add nofollow flag to constructor
3723         and pass it to base class constructor.
3724         (directory_iterator): Pass nofollow flag to _Dir constructor.
3725         (fs::recursive_directory_iterator::increment): Likewise.
3726         * src/filesystem/ops.cc (remove_all): Use nofollow option for
3727         directory_iterator constructor. Move error check outside loop.
3728
3729 2022-01-23  Jonathan Wakely  <jwakely@redhat.com>
3730
3731         PR libstdc++/104032
3732         * include/std/spanstream (basic_spanbuf(basic_spanbuf&&)): Use
3733         mem-initializer for _M_buf.
3734         (basic_spanbuf::Operator=(basic_spanbuf&&)): Fix ill-formed
3735         member access.
3736         * testsuite/27_io/spanstream/2.cc: New test.
3737
3738 2022-01-23  Jonathan Wakely  <jwakely@redhat.com>
3739
3740         * src/c++17/floating_from_chars.cc (USE_STRTOD_FOR_FROM_CHARS):
3741         Define macro for case where std::from_chars is implemented in
3742         terms of strtod, strtof or strtold.
3743         (buffer_resource, valid_fmt, find_end_of_float, pattern)
3744         (from_chars_impl, make_result, reserve_string): Do not define
3745         unless USE_STRTOD_FOR_FROM_CHARS is defined.
3746         (from_chars): Define when at least one of USE_LIB_FAST_FLOAT and
3747         USE_STRTOD_FOR_FROM_CHARS is defined, instead of
3748         _GLIBCXX_HAVE_USELOCALE. Use fast_float for long double when it
3749         is binary64.
3750
3751 2022-01-23  Jonathan Wakely  <jwakely@redhat.com>
3752
3753         PR libstdc++/104174
3754         * include/bits/hashtable_policy.h (_Map_base): Add partial
3755         specialization for maps with const key types.
3756         * testsuite/23_containers/unordered_map/104174.cc: New test.
3757
3758 2022-01-23  Jonathan Wakely  <jwakely@redhat.com>
3759
3760         PR libstdc++/104019
3761         * include/bits/shared_ptr_base.h (_Sp_counted_base<>::_M_release):
3762         Set members to zero without type punning.
3763
3764 2022-01-21  Jonathan Wakely  <jwakely@redhat.com>
3765
3766         * testsuite/20_util/shared_ptr/cons/array.cc: Fix comment.
3767
3768 2022-01-21  Jonathan Wakely  <jwakely@redhat.com>
3769
3770         PR libstdc++/87193
3771         PR libstdc++/104019
3772         * include/bits/alloc_traits.h (__cpp_lib_allocator_traits_is_always_equal):
3773         Define as type long.
3774         * include/bits/allocator.h (__cpp_lib_incomplete_container_elements):
3775         Likewise.
3776         * include/bits/basic_string.h (__cpp_lib_string_udls): Likewise.
3777         * include/bits/chrono.h (__cpp_lib_chrono): Likewise.
3778         (__cpp_lib_chrono_udls): Likewise.
3779         * include/bits/move.h (__cpp_lib_addressof_constexpr): Likewise.
3780         * include/bits/node_handle.h (__cpp_lib_node_extract): Likewise.
3781         * include/bits/range_access.h (__cpp_lib_nonmember_container_access):
3782         Likewise.
3783         * include/bits/shared_ptr.h (__cpp_lib_enable_shared_from_this):
3784         Likewise.
3785         * include/bits/stl_algo.h (__cpp_lib_clamp): Likewise.
3786         (__cpp_lib_sample): Likewise.
3787         * include/bits/stl_algobase.h (__cpp_lib_robust_nonmodifying_seq_ops):
3788         Likewise.
3789         * include/bits/stl_function.h (__cpp_lib_transparent_operators):
3790         Likewise.
3791         * include/bits/stl_iterator.h (__cpp_lib_make_reverse_iterator):
3792         Likewise.
3793         * include/bits/stl_map.h (__cpp_lib_map_try_emplace):
3794         Likewise.
3795         * include/bits/stl_tree.h (__cpp_lib_generic_associative_lookup):
3796         Likewise.
3797         * include/bits/unique_ptr.h (__cpp_lib_make_unique):
3798         Likewise.
3799         * include/bits/unordered_map.h (__cpp_lib_unordered_map_try_emplace):
3800         Likewise.
3801         * include/c_global/cmath (__cpp_lib_hypot): Likewise.
3802         * include/c_global/cstddef (__cpp_lib_byte): Likewise.
3803         * include/std/atomic (__cpp_lib_atomic_is_always_lock_free):
3804         Likewise.
3805         * include/std/complex (__cpp_lib_complex_udls): Likewise.
3806         * include/std/filesystem (__cpp_lib_filesystem): Likewise.
3807         * include/std/functional (__cpp_lib_not_fn): Likewise.
3808         (__cpp_lib_boyer_moore_searcher): Likewise.
3809         * include/std/iomanip (__cpp_lib_quoted_string_io): Likewise.
3810         * include/std/mutex (__cpp_lib_scoped_lock): Likewise.
3811         * include/std/numeric (__cpp_lib_gcd_lcm): Likewise.
3812         (__cpp_lib_gcd, __cpp_lib_lcm): Likewise.
3813         * include/std/tuple (__cpp_lib_apply): Likewise.
3814         (__cpp_lib_make_from_tuple): Likewise.
3815         * include/std/type_traits (__cpp_lib_integral_constant_callable)
3816         (__cpp_lib_bool_constant, __cpp_lib_logical_traits)
3817         (__cpp_lib_is_null_pointer, __cpp_lib_transformation_trait_aliases)
3818         (__cpp_lib_result_of_sfinae, __cpp_lib_void_t)
3819         (__cpp_lib_is_swappable, __cpp_lib_is_invocable)
3820         (__cpp_lib_has_unique_object_representations)
3821         (__cpp_lib_is_aggregate): Likewise.
3822         * include/std/version: Likewise.
3823         * libsupc++/new (__cpp_lib_launder): Likewise.
3824
3825 2022-01-21  Jonathan Wakely  <jwakely@redhat.com>
3826
3827         * include/std/version (__cpp_lib_shared_ptr_arrays): Fix
3828         condition for C++17 definition.
3829
3830 2022-01-21  Jonathan Wakely  <jwakely@redhat.com>
3831
3832         * include/bits/shared_ptr_atomic.h (_Sp_atomic::_Atomic_count):
3833         Add constexpr.
3834         (_Sp_atomic::_M_ptr): Add default member-initializer.
3835         * testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc:
3836         Check constant initialization.
3837         * testsuite/20_util/weak_ptr/atomic_weak_ptr.cc: Likewise.
3838
3839 2022-01-20  Jonathan Wakely  <jwakely@redhat.com>
3840
3841         * src/c++11/cxx11-ios_failure.cc (__constinit): Define as
3842         equivalent attribute for Clang.
3843         * src/c++11/future.cc (__constinit): Likewise.
3844         * src/c++11/system_error.cc (__constinit): Likewise.
3845         * src/c++17/memory_resource.cc (__constinit): Likewise.
3846
3847 2022-01-20  Jonathan Wakely  <jwakely@redhat.com>
3848
3849         * scripts/testsuite_flags.in: Only add src/filesystem/.libs and
3850         src/libbacktrace/.libs to LDFLAGS if those directories exist.
3851
3852 2022-01-19  Jonathan Wakely  <jwakely@redhat.com>
3853
3854         * configure.ac (GLIBCXX_ENABLE_DEBUG_FLAGS): Remove -gdwarf-4
3855         from default flags.
3856         * configure: Regenerate.
3857
3858 2022-01-19  Jonathan Wakely  <jwakely@redhat.com>
3859
3860         PR libstdc++/104123
3861         * testsuite/29_atomics/headers/stdatomic.h/c_compat.cc: Include
3862         <stddef.h>.
3863
3864 2022-01-19  Jonathan Wakely  <jwakely@redhat.com>
3865
3866         * scripts/testsuite_flags.in: Add src/libbacktrace/.libs to
3867         linker search paths.
3868         * src/Makefile.am: Fix src/debug/libbacktrace build.
3869         * src/Makefile.in: Regenerate.
3870         * src/libbacktrace/Makefile.am: Use per-library CPPFLAGS
3871         variable. Use symlinks for the source files.
3872         * src/libbacktrace/Makefile.in: Regenerate.
3873
3874 2022-01-19  Matthias Kretz  <m.kretz@gsi.de>
3875
3876         * include/experimental/bits/simd.h (__floating_point_flags): Do
3877         not rely on math_errhandling to expand to a constant expression.
3878
3879 2022-01-19  Jonathan Wakely  <jwakely@redhat.com>
3880
3881         * doc/xml/manual/evolution.xml: Document deprecations.
3882         * doc/xml/manual/status_cxx2017.xml: Update status.
3883         * doc/html/*: Regenerate.
3884
3885 2022-01-19  Jonathan Wakely  <jwakely@redhat.com>
3886
3887         * include/bits/stl_tempbuf.h (get_temporary_buffer): Change
3888         _GLIBCXX14_DEPRECATED to _GLIBCXX17_DEPRECATED.
3889
3890 2022-01-19  Jonathan Wakely  <jwakely@redhat.com>
3891
3892         * include/bits/stl_pair.h (_PCC::_DeprConsPair): Remove unused
3893         function.
3894
3895 2022-01-19  Jonathan Wakely  <jwakely@redhat.com>
3896
3897         PR libstdc++/104101
3898         * include/bits/shared_ptr_atomic.h (_Sp_atomic::_Atomic_count::lock):
3899         Only use __thread_relax if __cpp_lib_atomic_wait is defined.
3900
3901 2022-01-18  Jonathan Wakely  <jwakely@redhat.com>
3902
3903         PR libstdc++/104099
3904         * include/bits/basic_string.h (basic_string(nullptr_t)): Only
3905         define for C++23.
3906         (operator=(nullptr_t)): Likewise.
3907         * include/bits/cow_string.h: Likewise.
3908         * include/std/string_view (basic_string_view(nullptr_t)):
3909         Likewise.
3910         * testsuite/21_strings/basic_string/cons/char/nullptr.cc: Adjust
3911         expected error. Add examples that become ill-formed in C++23.
3912         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
3913         Adjust expected errors.
3914         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
3915         Likewise.
3916
3917 2022-01-18  Jonathan Wakely  <jwakely@redhat.com>
3918
3919         PR libstdc++/104098
3920         * include/bits/stl_iterator.h (reverse_iterator): Check
3921         __cpp_lib_concepts instead of __cplusplus.
3922
3923 2022-01-18  Jonathan Wakely  <jwakely@redhat.com>
3924
3925         PR libstdc++/101124
3926         * include/bits/stl_pair.h (pair): Adjust constraints on
3927         deprecated constructors accepting literal zero as null pointer
3928         constant. Improve wording of deprecated attribute.
3929         * testsuite/20_util/pair/cons/99957.cc: Check that deprecated
3930         constructors do not cause ambiguities for copyable types.
3931
3932 2022-01-18  Jonathan Wakely  <jwakely@redhat.com>
3933
3934         * include/bits/stl_function.h (ptr_fun): Fix suggestion for
3935         non-deprecated alternative.
3936
3937 2022-01-18  Tom Honermann  <tom@honermann.net>
3938
3939         * acinclude.m4: Define config macros if uchar.h provides
3940         c8rtomb() and mbrtoc8().
3941         * config.h.in: Regenerate.
3942         * configure: Regenerate.
3943         * include/c_compatibility/uchar.h (c8rtomb, mbrtoc8): Define.
3944         * include/c_global/cuchar (c8rtomb, mbrtoc8): Likewise.
3945         * include/c_std/cuchar (c8rtomb, mbrtoc8): Likewise.
3946         * testsuite/21_strings/headers/cuchar/functions_std_cxx20.cc:
3947         New test.
3948         * testsuite/21_strings/headers/cuchar/functions_std_fchar8_t.cc:
3949         New test.
3950
3951 2022-01-18  Jonathan Wakely  <jwakely@redhat.com>
3952
3953         * include/Makefile.am: Install new header.
3954         * include/Makefile.in: Regenerate.
3955         * include/c_compatibility/stdatomic.h: New file.
3956         * testsuite/29_atomics/headers/stdatomic.h/c_compat.cc: New test.
3957
3958 2022-01-18  Jonathan Wakely  <jwakely@redhat.com>
3959
3960         PR libstdc++/104080
3961         * src/c++17/fast_float/LOCAL_PATCHES: Update.
3962         * src/c++17/fast_float/fast_float.h (FASTFLOAT_IS_BIG_ENDIAN):
3963         Define in terms of __BYTE_ORDER__.
3964
3965 2022-01-18  Jonathan Wakely  <jwakely@redhat.com>
3966
3967         PR libstdc++/104080
3968         * src/c++17/fast_float/LOCAL_PATCHES: UPDATE.
3969         * src/c++17/fast_float/fast_float.h (round): Use explicit
3970         template argument list for std::min.
3971
3972 2022-01-18  Jonathan Wakely  <jwakely@redhat.com>
3973
3974         * doc/xml/manual/status_cxx2017.xml: Update C++17 status.
3975         * doc/xml/manual/status_cxx2020.xml: Use 12.1 instead of 12 for
3976         upcoming release.
3977         * doc/html/manual/status.html: Regenerate.
3978
3979 2022-01-18  Jonathan Wakely  <jwakely@redhat.com>
3980
3981         * acinclude.m4 (GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING): Improve
3982         comments.
3983         * configure: Regenerate.
3984
3985 2022-01-17  Patrick Palka  <ppalka@redhat.com>
3986
3987         * src/c++17/floating_from_chars.cc: (USE_LIB_FAST_FLOAT):
3988         Conditionally define, and use it to conditionally include
3989         fast_float.
3990         (from_chars): Use fast_float for float and double when
3991         USE_LIB_FAST_FLOAT.
3992
3993 2022-01-17  Patrick Palka  <ppalka@redhat.com>
3994
3995         * src/c++17/fast_float/LOCAL_PATCHES: Update.
3996         * src/c++17/fast_float/fast_float.h (from_chars_advanced): In
3997         case of over/underflow, return errc::result_out_of_range and don't
3998         modify 'value'.
3999
4000 2022-01-17  Patrick Palka  <ppalka@redhat.com>
4001
4002         * src/c++17/fast_float/LOCAL_PATCHES: Update.
4003         * src/c++17/fast_float/fast_float.h: Apply local modifications.
4004
4005 2022-01-17  Patrick Palka  <ppalka@redhat.com>
4006
4007         * src/c++17/fast_float/LOCAL_PATCHES: New file.
4008         * src/c++17/fast_float/MERGE: New file.
4009         * src/c++17/fast_float/README.md: New file, copied from the
4010         fast_float repository.
4011         * src/c++17/fast_float/fast_float.h: New file, an amalgamation
4012         of the fast_float library.
4013
4014 2022-01-17  Patrick Palka  <ppalka@redhat.com>
4015
4016         * src/c++17/floating_from_chars.cc: Include <bit>.
4017         (ascii_to_hexit, starts_with_ci): Conditionally define.
4018         (__floating_from_chars_hex):  Conditionally define.
4019         (from_chars): Use __floating_from_chars_hex for
4020         chars_format::hex parsing of binary32/64 float/double.
4021         (testsuite/20_util/from_chars/7.cc): New test.
4022         * testsuite/20_util/from_chars/7.cc: New file.
4023
4024 2022-01-17  Jonathan Wakely  <jwakely@redhat.com>
4025
4026         * acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): New macro.
4027         * configure.ac: Use GLIBCXX_ENABLE_BACKTRACE.
4028         * include/Makefile.am: Add new header.
4029         * include/Makefile.in: Regenerate.
4030         * include/std/stacktrace: New header.
4031         * include/std/version (__cpp_lib_stacktrace): Define.
4032         * Makefile.in: Regenerate.
4033         * config.h.in: Regenerate.
4034         * configure: Regenerate.
4035         * doc/Makefile.in: Regenerate.
4036         * libsupc++/Makefile.in: Regenerate.
4037         * po/Makefile.in: Regenerate.
4038         * python/Makefile.in: Regenerate.
4039         * src/Makefile.am: Regenerate.
4040         * src/Makefile.in: Regenerate.
4041         * src/c++11/Makefile.in: Regenerate.
4042         * src/c++17/Makefile.in: Regenerate.
4043         * src/c++20/Makefile.in: Regenerate.
4044         * src/c++98/Makefile.in: Regenerate.
4045         * src/filesystem/Makefile.in: Regenerate.
4046         * testsuite/Makefile.in: Regenerate.
4047         * src/libbacktrace/Makefile.am: New file.
4048         * src/libbacktrace/Makefile.in: New file.
4049         * src/libbacktrace/backtrace-rename.h: New file.
4050         * src/libbacktrace/backtrace-supported.h.in: New file.
4051         * src/libbacktrace/config.h.in: New file.
4052         * testsuite/lib/libstdc++.exp (check_effective_target_stacktrace):
4053         New proc.
4054         * testsuite/20_util/stacktrace/entry.cc: New test.
4055         * testsuite/20_util/stacktrace/synopsis.cc: New test.
4056         * testsuite/20_util/stacktrace/version.cc: New test.
4057
4058 2022-01-17  Jonathan Wakely  <jwakely@redhat.com>
4059
4060         * doc/xml/manual/status_cxx2020.xml: Use final C++20 option
4061         names.
4062         * doc/html/manual/status.html: Regenerate.
4063
4064 2022-01-17  Jonathan Wakely  <jwakely@redhat.com>
4065
4066         PR libstdc++/103650
4067         * include/Makefile.am: Rename LT_OBJDIR and STDC_HEADERS.
4068         * include/Makefile.in: Regenerate.
4069         * testsuite/17_intro/headers/c++1998/103650.cc: New test.
4070
4071 2022-01-17  Matthias Kretz  <m.kretz@gsi.de>
4072
4073         * include/experimental/bits/simd.h (__floating_point_flags): Do
4074         not rely on the presence of the math_errhandling macro.
4075
4076 2022-01-17  Jonathan Wakely  <jwakely@redhat.com>
4077
4078         * include/bits/shared_ptr_atomic.h (_Sp_atomic): Add typename
4079         to qualified-id for dependent type.
4080
4081 2022-01-17  Jonathan Wakely  <jwakely@redhat.com>
4082
4083         * doc/xml/manual/status_cxx2020.xml: Update.
4084         * doc/html/manual/status.html: Regenerate.
4085
4086 2022-01-17  Jonathan Wakely  <jwakely@redhat.com>
4087             Thomas Rodgers  <trodgers@redhat.com>
4088
4089         * include/bits/shared_ptr_atomic.h (__cpp_lib_atomic_shared_ptr):
4090         New macro.
4091         (_Sp_atomic): New class template.
4092         (atomic<shared_ptr<T>>, atomic<weak_ptr<T>>): New partial
4093         specializations.
4094         * include/bits/shared_ptr_base.h (__shared_count, __weak_count)
4095         (__shared_ptr, __weak_ptr): Declare _Sp_atomic as a friend.
4096         * include/std/version (__cpp_lib_atomic_shared_ptr): New macro.
4097         * testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc: New
4098         test.
4099         * testsuite/20_util/weak_ptr/atomic_weak_ptr.cc: New test.
4100
4101 2022-01-15  Matthias Kretz  <m.kretz@gsi.de>
4102
4103         * include/experimental/bits/simd.h: Move feature detection bools
4104         and add __have_avx512bitalg, __have_avx512vbmi2,
4105         __have_avx512vbmi, __have_avx512ifma, __have_avx512cd,
4106         __have_avx512vnni, __have_avx512vpopcntdq.
4107         (__detail::__machine_flags): New function which returns a unique
4108         uint64 depending on relevant -m and -f flags.
4109         (__detail::__odr_helper): New type alias for either an anonymous
4110         type or a type specialized with the __machine_flags number.
4111         (_SimdIntOperators): Change template parameters from _Impl to
4112         _Tp, _Abi because _Impl now has an __odr_helper parameter which
4113         may be _OdrEnforcer from the anonymous namespace, which makes
4114         for a bad base class.
4115         (many): Either add __odr_helper template parameter or mark as
4116         always_inline.
4117         * include/experimental/bits/simd_detail.h: Add defines for
4118         AVX512BITALG, AVX512VBMI2, AVX512VBMI, AVX512IFMA, AVX512CD,
4119         AVX512VNNI, AVX512VPOPCNTDQ, and AVX512VP2INTERSECT.
4120         * include/experimental/bits/simd_builtin.h: Add __odr_helper
4121         template parameter or mark as always_inline.
4122         * include/experimental/bits/simd_fixed_size.h: Ditto.
4123         * include/experimental/bits/simd_math.h: Ditto.
4124         * include/experimental/bits/simd_scalar.h: Ditto.
4125         * include/experimental/bits/simd_neon.h: Add __odr_helper
4126         template parameter.
4127         * include/experimental/bits/simd_ppc.h: Ditto.
4128         * include/experimental/bits/simd_x86.h: Ditto.
4129
4130 2022-01-14  Uroš Bizjak  <ubizjak@gmail.com>
4131
4132         * testsuite/22_locale/numpunct/members/char/3.cc:
4133         Require pt_PT locale instead of nl_NL.
4134         (test02): Use pt_PT locale instead of nl_NL.
4135
4136 2022-01-14  Jonathan Wakely  <jwakely@redhat.com>
4137
4138         PR libstdc++/91260
4139         PR libstdc++/91383
4140         PR libstdc++/95065
4141         * include/backward/binders.h (bind1st, bind2nd): Add deprecated
4142         attribute.
4143         * include/bits/refwrap.h (_Maybe_unary_or_binary_function):
4144         Disable deprecated warnings for base classes.
4145         (_Reference_wrapper_base): Likewise.
4146         * include/bits/shared_ptr_base.h (_Sp_owner_less): Likewise.
4147         * include/bits/stl_bvector.h (_Bit_iterator_base): Likewise.
4148         * include/bits/stl_function.h (unary_function, binary_function):
4149         Add deprecated attribute.
4150         (unary_negate, not1, binary_negate, not2, ptr_fun)
4151         (pointer_to_unary_function, pointer_to_binary_function)
4152         (mem_fun_t, const_mem_fun_t, mem_fun_ref_t, const_mem_fun_ref_t)
4153         (mem_fun1_t, const_mem_fun1_t, mem_fun_ref1_t)
4154         (const_mem_fun1_ref_t, mem_fun, mem_fun_ref): Add deprecated
4155         attributes.
4156         * include/bits/stl_iterator.h: Disable deprecated warnings for
4157         std::iterator base classes.
4158         * include/bits/stl_iterator_base_types.h (iterator): Add
4159         deprecated attribute.
4160         * include/bits/stl_map.h (map::value_compare): Disable
4161         deprecated warnings for base class.
4162         * include/bits/stl_multimap.h (multimap::value_compare):
4163         Likewise.
4164         * include/bits/stl_raw_storage_iter.h (raw_storage_iterator):
4165         Add deprecated attribute.
4166         * include/bits/stl_tempbuf.h (get_temporary_buffer): Likewise.
4167         * include/bits/stream_iterator.h: Disable deprecated warnings.
4168         * include/bits/streambuf_iterator.h: Likewise.
4169         * include/ext/bitmap_allocator.h: Remove unary_function base
4170         classes.
4171         * include/ext/functional: Disable deprecated warnings.
4172         * include/ext/rope: Likewise.
4173         * include/ext/throw_allocator.h: Likewise.
4174         * include/std/type_traits (result_of): Add deprecated attribute.
4175         * include/tr1/functional: Disable deprecated warnings.
4176         * include/tr1/functional_hash.h: Likewise.
4177         * testsuite/20_util/function_objects/binders/1.cc: Add
4178         -Wno-disable-deprecations.
4179         * testsuite/20_util/function_objects/binders/3113.cc: Likewise.
4180         * testsuite/20_util/function_objects/constexpr.cc: Add
4181         dg-warning.
4182         * testsuite/20_util/raw_storage_iterator/base.cc: Likewise.
4183         * testsuite/20_util/raw_storage_iterator/dr2127.cc: Likewise.
4184         * testsuite/20_util/raw_storage_iterator/requirements/base_classes.cc:
4185         Likewise.
4186         * testsuite/20_util/raw_storage_iterator/requirements/explicit_instantiation/1.cc:
4187         Likewise.
4188         * testsuite/20_util/raw_storage_iterator/requirements/typedefs.cc:
4189         Likewise.
4190         * testsuite/20_util/reference_wrapper/24803.cc:
4191         Likewise.
4192         * testsuite/20_util/reference_wrapper/typedefs.cc: Enable for
4193         C++20 and check for absence of nested types.
4194         * testsuite/20_util/shared_ptr/comparison/less.cc: Remove
4195         std::binary_function base class.
4196         * testsuite/20_util/temporary_buffer.cc: Add dg-warning.
4197         * testsuite/21_strings/basic_string/cons/char/69092.cc: Remove
4198         std::iterator base class.
4199         * testsuite/24_iterators/back_insert_iterator/requirements/base_classes.cc:
4200         Likewise.
4201         * testsuite/24_iterators/front_insert_iterator/requirements/base_classes.cc:
4202         Likewise.
4203         * testsuite/24_iterators/insert_iterator/requirements/base_classes.cc:
4204         Likewise.
4205         * testsuite/24_iterators/istream_iterator/requirements/base_classes.cc:
4206         Likewise.
4207         * testsuite/24_iterators/istreambuf_iterator/92285.cc:
4208         Likewise.
4209         * testsuite/24_iterators/istreambuf_iterator/requirements/base_classes.cc:
4210         Likewise.
4211         * testsuite/24_iterators/ostream_iterator/requirements/base_classes.cc:
4212         Likewise.
4213         * testsuite/24_iterators/ostreambuf_iterator/requirements/base_classes.cc:
4214         Likewise.
4215         * testsuite/24_iterators/reverse_iterator/requirements/base_classes.cc:
4216         Likewise.
4217         * testsuite/25_algorithms/copy/34595.cc:
4218         Likewise.
4219         * testsuite/25_algorithms/minmax/3.cc: Remove std::binary_function
4220         base class.
4221         * testsuite/25_algorithms/all_of/requirements/explicit_instantiation/2.cc:
4222         Disable deprecated warnings.
4223         * testsuite/25_algorithms/all_of/requirements/explicit_instantiation/pod.cc:
4224         Likewise.
4225         * testsuite/25_algorithms/any_of/requirements/explicit_instantiation/2.cc:
4226         Likewise.
4227         * testsuite/25_algorithms/any_of/requirements/explicit_instantiation/pod.cc:
4228         Likewise.
4229         * testsuite/25_algorithms/copy_if/requirements/explicit_instantiation/2.cc:
4230         Likewise.
4231         * testsuite/25_algorithms/copy_if/requirements/explicit_instantiation/pod.cc:
4232         Likewise.
4233         * testsuite/25_algorithms/count_if/requirements/explicit_instantiation/2.cc:
4234         Likewise.
4235         * testsuite/25_algorithms/count_if/requirements/explicit_instantiation/pod.cc:
4236         Likewise.
4237         * testsuite/25_algorithms/find_end/requirements/explicit_instantiation/2.cc:
4238         Likewise.
4239         * testsuite/25_algorithms/find_end/requirements/explicit_instantiation/pod.cc:
4240         Likewise.
4241         * testsuite/25_algorithms/find_first_of/requirements/explicit_instantiation/2.cc:
4242         Likewise.
4243         * testsuite/25_algorithms/find_first_of/requirements/explicit_instantiation/pod.cc:
4244         Likewise.
4245         * testsuite/25_algorithms/find_if/requirements/explicit_instantiation/2.cc:
4246         Likewise.
4247         * testsuite/25_algorithms/find_if/requirements/explicit_instantiation/pod.cc:
4248         Likewise.
4249         * testsuite/25_algorithms/find_if_not/requirements/explicit_instantiation/2.cc:
4250         Likewise.
4251         * testsuite/25_algorithms/find_if_not/requirements/explicit_instantiation/pod.cc:
4252         Likewise.
4253         * testsuite/25_algorithms/for_each/requirements/explicit_instantiation/2.cc:
4254         Likewise.
4255         * testsuite/25_algorithms/for_each/requirements/explicit_instantiation/pod.cc:
4256         Likewise.
4257         * testsuite/25_algorithms/is_partitioned/requirements/explicit_instantiation/2.cc:
4258         Likewise.
4259         * testsuite/25_algorithms/is_partitioned/requirements/explicit_instantiation/pod.cc:
4260         Likewise.
4261         * testsuite/25_algorithms/is_permutation/requirements/explicit_instantiation/2.cc:
4262         Likewise.
4263         * testsuite/25_algorithms/is_permutation/requirements/explicit_instantiation/pod.cc:
4264         Likewise.
4265         * testsuite/25_algorithms/none_of/requirements/explicit_instantiation/2.cc:
4266         Likewise.
4267         * testsuite/25_algorithms/none_of/requirements/explicit_instantiation/pod.cc:
4268         Likewise.
4269         * testsuite/25_algorithms/partition/requirements/explicit_instantiation/2.cc:
4270         Likewise.
4271         * testsuite/25_algorithms/partition/requirements/explicit_instantiation/pod.cc:
4272         Likewise.
4273         * testsuite/25_algorithms/partition_copy/requirements/explicit_instantiation/2.cc:
4274         Likewise.
4275         * testsuite/25_algorithms/partition_copy/requirements/explicit_instantiation/pod.cc:
4276         Likewise.
4277         * testsuite/25_algorithms/partition_point/requirements/explicit_instantiation/2.cc:
4278         Likewise.
4279         * testsuite/25_algorithms/partition_point/requirements/explicit_instantiation/pod.cc:
4280         Likewise.
4281         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc:
4282         Likewise.
4283         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc:
4284         Likewise.
4285         * testsuite/25_algorithms/remove_copy_if/requirements/explicit_instantiation/2.cc:
4286         Likewise.
4287         * testsuite/25_algorithms/remove_copy_if/requirements/explicit_instantiation/pod.cc:
4288         Likewise.
4289         * testsuite/25_algorithms/remove_if/requirements/explicit_instantiation/2.cc:
4290         Likewise.
4291         * testsuite/25_algorithms/remove_if/requirements/explicit_instantiation/pod.cc:
4292         Likewise.
4293         * testsuite/25_algorithms/replace_copy_if/requirements/explicit_instantiation/2.cc:
4294         Likewise.
4295         * testsuite/25_algorithms/replace_copy_if/requirements/explicit_instantiation/pod.cc:
4296         Likewise.
4297         * testsuite/25_algorithms/replace_if/requirements/explicit_instantiation/2.cc:
4298         Likewise.
4299         * testsuite/25_algorithms/replace_if/requirements/explicit_instantiation/pod.cc:
4300         Likewise.
4301         * testsuite/25_algorithms/search/requirements/explicit_instantiation/2.cc:
4302         Likewise.
4303         * testsuite/25_algorithms/search/requirements/explicit_instantiation/pod.cc:
4304         Likewise.
4305         * testsuite/25_algorithms/search_n/requirements/explicit_instantiation/2.cc:
4306         Likewise.
4307         * testsuite/25_algorithms/search_n/requirements/explicit_instantiation/pod.cc:
4308         Likewise.
4309         * testsuite/25_algorithms/stable_partition/requirements/explicit_instantiation/2.cc:
4310         Likewise.
4311         * testsuite/25_algorithms/stable_partition/requirements/explicit_instantiation/pod.cc:
4312         Likewise.
4313         * testsuite/25_algorithms/transform/requirements/explicit_instantiation/2.cc:
4314         Likewise.
4315         * testsuite/25_algorithms/transform/requirements/explicit_instantiation/pod.cc:
4316         Likewise.
4317         * testsuite/27_io/basic_filebuf/underflow/wchar_t/9178.cc: Add
4318         dg-warning.
4319         * testsuite/ext/pb_ds/example/priority_queue_erase_if.cc:
4320         Likewise.
4321         * testsuite/ext/pb_ds/example/priority_queue_split_join.cc:
4322         Likewise.
4323         * testsuite/tr1/3_function_objects/reference_wrapper/typedefs.cc:
4324         Disable deprecated warnings.
4325         * testsuite/tr1/6_containers/hash/requirements/base_classes.cc:
4326         Likewise.
4327         * testsuite/util/regression/trait/erase_if_fn.hpp: Remove
4328         std::unary_function base classes.
4329         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper):
4330         Remove std::iterator base classes.
4331
4332 2022-01-14  Jonathan Wakely  <jwakely@redhat.com>
4333
4334         * include/bits/shared_ptr.h (__cpp_lib_shared_ptr_weak_type):
4335         Correct type of macro value.
4336         (shared_ptr): Add additional friend declarations.
4337         (make_shared, allocate_shared): Constrain existing overloads and
4338         remove static_assert.
4339         * include/bits/shared_ptr_base.h (__cpp_lib_smart_ptr_for_overwrite):
4340         New macro.
4341         (_Sp_counted_ptr_inplace<T, Alloc, Lp>): New partial
4342         specialization for use with make_shared_for_overwrite.
4343         (__cpp_lib_shared_ptr_arrays): Update value for C++20.
4344         (_Sp_counted_array_base): New class template.
4345         (_Sp_counted_array): New class template.
4346         (__shared_count(_Tp*&, const _Sp_counted_array_base&, _Init)):
4347         New constructor for allocating shared arrays.
4348         (__shared_ptr(const _Sp_counted_array_base&, _Init)): Likewise.
4349         * include/std/version (__cpp_lib_shared_ptr_weak_type): Correct
4350         type.
4351         (__cpp_lib_shared_ptr_arrays): Update value for C++20.
4352         (__cpp_lib_smart_ptr_for_overwrite): New macro.
4353         * testsuite/20_util/shared_ptr/creation/99006.cc: Adjust
4354         expected errors.
4355         * testsuite/20_util/shared_ptr/creation/array.cc: New test.
4356         * testsuite/20_util/shared_ptr/creation/overwrite.cc: New test.
4357         * testsuite/20_util/shared_ptr/creation/version.cc: New test.
4358         * testsuite/20_util/unique_ptr/creation/for_overwrite.cc: Check
4359         feature test macro. Test non-trivial default-initialization.
4360
4361 2022-01-14  Jonathan Wakely  <jwakely@redhat.com>
4362
4363         * include/bits/stl_construct.h (_Construct, _Construct_novalue):
4364         Also cast away cv-qualifiers when converting pointer to void.
4365         * testsuite/20_util/allocator/void.cc: Test construct function
4366         with cv-qualified types.
4367
4368 2022-01-14  Jonathan Wakely  <jwakely@redhat.com>
4369
4370         PR libstdc++/103992
4371         * include/bits/stl_iterator.h (common_iterator): Use
4372         std::construct_at instead of placement new.
4373         * testsuite/24_iterators/common_iterator/1.cc: Check copy
4374         construction is usable in constant expressions.
4375
4376 2022-01-14  Jonathan Wakely  <jwakely@redhat.com>
4377
4378         * doc/xml/manual/status_cxx2011.xml: Document new tokens
4379         accepted by std::random_device constructor.
4380         * doc/html/manual/status.html: Regenerate.
4381
4382 2022-01-12  Patrick Palka  <ppalka@redhat.com>
4383
4384         * testsuite/20_util/to_chars/103955.cc: Add explicit dg-do
4385         directive.
4386
4387 2022-01-12  Patrick Palka  <ppalka@redhat.com>
4388
4389         PR libstdc++/103955
4390         * src/c++17/floating_to_chars.cc (__floating_to_chars_hex):
4391         Track the excess precision separately from the effective
4392         precision.  Avoid overflow in bounds check by splitting it into
4393         two checks.
4394         (__floating_to_chars_precision): Avoid overflow in bounds checks
4395         similarly.
4396         * testsuite/20_util/to_chars/103955.cc: New test.
4397
4398 2022-01-11  Jonathan Wakely  <jwakely@redhat.com>
4399
4400         PR libstdc++/103726
4401         * include/Makefile.am: Install <source_location> for
4402         freestanding.
4403         * include/Makefile.in: Regenerate.
4404         * include/std/version (__cpp_lib_source_location): Define for
4405         freestanding.
4406
4407 2022-01-11  Jonathan Wakely  <jwakely@redhat.com>
4408
4409         * include/std/ranges (ranges::lazy_split_view::_InnerIter::end()):
4410         Add neoxcept (LWG 3593).
4411
4412 2022-01-11  Jonathan Wakely  <jwakely@redhat.com>
4413
4414         * include/std/ranges (ranges::__detail::__box): Add constexpr to
4415         assignment operators (LWG 3572).
4416         * testsuite/std/ranges/adaptors/filter.cc: Check assignment of a
4417         view that uses copyable-box.
4418
4419 2022-01-11  Jonathan Wakely  <jwakely@redhat.com>
4420
4421         PR libstdc++/103726
4422         * include/Makefile.am: Install <coroutine> for freestanding.
4423         * include/Makefile.in: Regenerate.
4424         * include/std/coroutine: Adjust headers and preprocessor
4425         conditions.
4426         (__coroutine_traits_impl): Use concepts when available.
4427         [_GLIBCXX_HOSTED] (hash<coroutine_handle>): Define.
4428
4429 2022-01-11  Jonathan Wakely  <jwakely@redhat.com>
4430
4431         * include/std/ostream (operator<<(basic_ostream&, charT)):
4432         Use unformatted input if no padding is needed.
4433         (operator<<(basic_ostream<char>&, char)): Likewise.
4434
4435 2022-01-11  Jonathan Wakely  <jwakely@redhat.com>
4436
4437         PR libstdc++/103891
4438         * include/bits/c++config (_GLIBCXX_HAVE_COND_TRIVIAL_SPECIAL_MEMBERS):
4439         Define.
4440         * include/std/variant (__cpp_lib_variant): Only define C++20
4441         value when the compiler is known to support conditionally
4442         trivial destructors.
4443         * include/std/version (__cpp_lib_variant): Likewise.
4444
4445 2022-01-11  Jonathan Wakely  <jwakely@redhat.com>
4446
4447         * include/bits/stl_iterator.h (common_iterator): Add constexpr
4448         to all member functions (LWG 3574).
4449         * testsuite/24_iterators/common_iterator/1.cc: Evaluate some
4450         tests as constant expressions.
4451         * testsuite/24_iterators/common_iterator/2.cc: Likewise.
4452
4453 2022-01-10  Jakub Jelinek  <jakub@redhat.com>
4454
4455         PR libstdc++/77760
4456         * include/bits/locale_facets_nonio.h (__time_get_state): New struct.
4457         (time_get::_M_extract_via_format): Declare new method with
4458         __time_get_state& as an extra argument.
4459         * include/bits/locale_facets_nonio.tcc (_M_extract_via_format): Add
4460         __state argument, set various fields in it while parsing.  Handle %j,
4461         %U, %w and %W, fix up handling of %y, %Y and %C, don't adjust tm_hour
4462         for %p immediately.  Add a wrapper around the method without the
4463         __state argument for backwards compatibility.
4464         (_M_extract_num): Remove all __len == 4 special cases.
4465         (time_get::do_get_time, time_get::do_get_date, time_get::do_get): Zero
4466         initialize __state, pass it to _M_extract_via_format and finalize it
4467         at the end.
4468         (do_get_year): For 1-2 digit parsed years, map 0-68 to 2000-2068,
4469         69-99 to 1969-1999.  For 3-4 digit parsed years use that as year.
4470         (get): If do_get isn't overloaded from the locale_facets_nonio.tcc
4471         version, don't call do_get but call _M_extract_via_format instead to
4472         pass around state.
4473         * config/abi/pre/gnu.ver (GLIBCXX_3.4.30): Export _M_extract_via_format
4474         with extra __time_get_state and __time_get_state::_M_finalize_state.
4475         * src/c++98/locale_facets.cc (is_leap, day_of_the_week,
4476         day_of_the_year): New functions in anon namespace.
4477         (mon_yday): New var in anon namespace.
4478         (__time_get_state::_M_finalize_state): Define.
4479         * testsuite/22_locale/time_get/get/char/4.cc: New test.
4480         * testsuite/22_locale/time_get/get/wchar_t/4.cc: New test.
4481         * testsuite/22_locale/time_get/get_year/char/1.cc (test01): Parse 197
4482         as year 197AD instead of error.
4483         * testsuite/22_locale/time_get/get_year/char/5.cc (test01): Parse 1 as
4484         year 2001 instead of error.
4485         * testsuite/22_locale/time_get/get_year/char/6.cc: New test.
4486         * testsuite/22_locale/time_get/get_year/wchar_t/1.cc (test01): Parse
4487         197 as year 197AD instead of error.
4488         * testsuite/22_locale/time_get/get_year/wchar_t/5.cc (test01): Parse
4489         1 as year 2001 instead of error.
4490         * testsuite/22_locale/time_get/get_year/wchar_t/6.cc: New test.
4491
4492 2022-01-10  Jonathan Wakely  <jwakely@redhat.com>
4493
4494         PR libstdc++/103866
4495         * acinclude.m4 (GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS): Do
4496         nothing for freestanding builds.
4497         (GLIBCXX_ENABLE_HOSTED): Define FREESTANDING_FLAGS.
4498         * configure.ac: Do not use AC_LIBTOOL_DLOPEN when configured
4499         with --without-headers.  Do not use GCC_HEADER_STDINT for
4500         freestanding builds.
4501         * libsupc++/Makefile.am (HOSTED_CXXFLAGS): Use -ffreestanding
4502         for freestanding builds.
4503         * configure: Regenerate.
4504         * Makefile.in: Regenerate.
4505         * doc/Makefile.in: Regenerate.
4506         * include/Makefile.in: Regenerate.
4507         * libsupc++/Makefile.in: Regenerate.
4508         * po/Makefile.in: Regenerate.
4509         * python/Makefile.in: Regenerate.
4510         * src/Makefile.in: Regenerate.
4511         * src/c++11/Makefile.in: Regenerate.
4512         * src/c++17/Makefile.in: Regenerate.
4513         * src/c++20/Makefile.in: Regenerate.
4514         * src/c++98/Makefile.in: Regenerate.
4515         * src/filesystem/Makefile.in: Regenerate.
4516         * testsuite/Makefile.in: Regenerate.
4517
4518 2022-01-10  Jonathan Wakely  <jwakely@redhat.com>
4519
4520         * testsuite/28_regex/algorithms/regex_replace/char/103664.cc:
4521         Add dg-timeout-factor directive.
4522         * testsuite/28_regex/basic_regex/84110.cc: Likewise.
4523         * testsuite/28_regex/basic_regex/ctors/char/other.cc: Likewise.
4524         * testsuite/28_regex/match_results/102667.cc: Likewise.
4525
4526 2022-01-10  Jonathan Wakely  <jwakely@redhat.com>
4527
4528         * doc/xml/manual/using.xml: Update documentation around default
4529         -std option.
4530         * doc/html/*: Regenerate.
4531
4532 2022-01-10  Jonathan Wakely  <jwakely@redhat.com>
4533
4534         PR libstdc++/100017
4535         * src/c++17/Makefile.am (AM_CXXFLAGS): Add -nostdinc++.
4536         * src/c++17/Makefile.in: Regenerate.
4537
4538 2022-01-09  Sandra Loosemore  <sandra@codesourcery.com>
4539
4540         * testsuite/18_support/type_info/constexpr.cc: Add explicit
4541         -fdelete-null-pointer-checks option.
4542
4543 2022-01-06  Pavel I. Kryukov  <pavel.kryukov@phystech.edu>
4544             Jonathan Wakely  <jwakely@redhat.com>
4545
4546         PR libstdc++/103853
4547         * include/bits/forward_list.tcc (forward_list::merge): Check for
4548         self-merge.
4549         * testsuite/23_containers/forward_list/operations/merge.cc: New test.
4550
4551 2022-01-06  Jonathan Wakely  <jwakely@redhat.com>
4552
4553         * include/bits/regex.h (basic_regex, match_results): Qualify
4554         name in friend declaration, to work around Clang bug.
4555
4556 2022-01-06  Jonathan Wakely  <jwakely@redhat.com>
4557
4558         * testsuite/ext/rope/pthread7-rope.cc: Add dg-timeout-factor.
4559
4560 2022-01-06  Jonathan Wakely  <jwakely@redhat.com>
4561
4562         PR libstdc++/103911
4563         * include/std/charconv (__from_chars_alpha_to_num): Return
4564         char instead of unsigned char. Change invalid return value to
4565         127 instead of using numeric trait.
4566         (__from_chars_alnum): Fix comment. Do not use std::isdigit.
4567         Change type of variable to char.
4568
4569 2022-01-05  François Dumont  <fdumont@gcc.gnu.org>
4570
4571         PR libstdc++/68303
4572         * include/bits/hashtable_policy.h
4573         (_Hashtable_hash_traits<_Hash>): New.
4574         (_Hash_code_base<>::_M_hash_code(const _Hash_node_value<>&)): New.
4575         (_Hashtable_base<>::_M_key_equals): New.
4576         (_Hashtable_base<>::_M_equals): Use latter.
4577         (_Hashtable_base<>::_M_key_equals_tr): New.
4578         (_Hashtable_base<>::_M_equals_tr): Use latter.
4579         * include/bits/hashtable.h
4580         (_Hashtable<>::__small_size_threshold()): New, use _Hashtable_hash_traits.
4581         (_Hashtable<>::find): Loop through elements to look for key if size is lower
4582         than __small_size_threshold().
4583         (_Hashtable<>::_M_emplace(true_type, _Args&&...)): Likewise.
4584         (_Hashtable<>::_M_insert_unique(_Kt&&, _Args&&, const _NodeGenerator&)): Likewise.
4585         (_Hashtable<>::_M_compute_hash_code(const_iterator, const key_type&)): New.
4586         (_Hashtable<>::_M_emplace(const_iterator, false_type, _Args&&...)): Use latter.
4587         (_Hashtable<>::_M_find_before_node(const key_type&)): New.
4588         (_Hashtable<>::_M_erase(true_type, const key_type&)): Use latter.
4589         (_Hashtable<>::_M_erase(false_type, const key_type&)): Likewise.
4590         * src/c++11/hashtable_c++0x.cc: Include <bits/functional_hash.h>.
4591         * testsuite/util/testsuite_performance.h
4592         (report_performance): Use 9 width to display memory.
4593         * testsuite/performance/23_containers/insert_erase/unordered_small_size.cc:
4594         New performance test case.
4595
4596 2022-01-05  Jonathan Wakely  <jwakely@redhat.com>
4597
4598         PR libstdc++/103919
4599         * include/bits/basic_string.h (basic_string(const T&, size_t, size_t)):
4600         Relax constraints on string_view parameter.
4601         * include/bits/cow_string.h (basic_string(const T&, size_t, size_t)):
4602         Likewise.
4603         * testsuite/21_strings/basic_string/cons/char/103919.cc: New test.
4604
4605 2022-01-05  Jonathan Wakely  <jwakely@redhat.com>
4606
4607         * config/abi/pre/gnu.ver (GLIBCXX_3.4.30): Export new symbol for
4608         ARM EABI.
4609         * include/bits/c++config (_GLIBCXX23_CONSTEXPR): Define.
4610         * include/std/version (__cpp_lib_constexpr_typeinfo): Define.
4611         * libsupc++/tinfo.cc: Add #error to ensure non-inline definition
4612         is emitted.
4613         (type_info::__equal): Define alias symbol.
4614         * libsupc++/typeinfo (type_info::before): Combine different
4615         implementations into one.
4616         (type_info::operator==): Likewise. Use address equality for
4617         constant evaluation. Call __equal for targets that require the
4618         definition to be non-inline.
4619         * testsuite/18_support/type_info/constexpr.cc: New test.
4620
4621 2022-01-05  Jonathan Wakely  <jwakely@redhat.com>
4622
4623         * src/c++11/cxx11-ios_failure.cc (io_error_category): Define
4624         class and virtual functions as 'final'.
4625         (io_category_instance): Use constinit union to make the object
4626         immortal.
4627         * src/c++11/future.cc (future_error_category): Define class and
4628         virtual functions as 'final'.
4629         (future_category_instance): Use constinit union.
4630
4631 2022-01-05  Jonathan Wakely  <jwakely@redhat.com>
4632
4633         * python/libstdcxx/v6/printers.py (StdErrorCodePrinter): Strip
4634         versioned namespace from the type name that is printed.
4635
4636 2022-01-05  Jonathan Wakely  <jwakely@redhat.com>
4637
4638         * python/libstdcxx/v6/printers.py (StdRegexStatePrinter): New
4639         printer for std::regex NFA states.
4640
4641 2022-01-05  Jonathan Wakely  <jwakely@redhat.com>
4642
4643         * testsuite/23_containers/forward_list/operations/1.cc: Fill in
4644         placeholders in comments.
4645         * testsuite/23_containers/forward_list/operations/2.cc:
4646         Likewise.
4647         * testsuite/23_containers/forward_list/operations/3.cc:
4648         Likewise.
4649         * testsuite/23_containers/forward_list/operations/4.cc:
4650         Likewise.
4651         * testsuite/23_containers/forward_list/operations/5.cc:
4652         Likewise.
4653         * testsuite/23_containers/forward_list/operations/6.cc:
4654         Likewise.
4655         * testsuite/23_containers/forward_list/operations/7.cc:
4656         Likewise.
4657
4658 2022-01-05  Jonathan Wakely  <jwakely@redhat.com>
4659
4660         PR libstdc++/103848
4661         * include/bits/stl_deque.h (operator-): Do not use 0 as null
4662         pointer constant.
4663
4664 2022-01-05  Jonathan Wakely  <jwakely@redhat.com>
4665
4666         * include/bits/alloc_traits.h (allocator_traits<allocator<void>>):
4667         Use std::_Construct for construct.
4668
4669 2022-01-05  Jonathan Wakely  <jwakely@redhat.com>
4670
4671         PR libstdc++/103877
4672         * doc/xml/faq.xml: Add '-x c++' to preprocessor command.
4673         * doc/html/faq.html: Regenerate.
4674
4675 2022-01-05  Jonathan Wakely  <jwakely@redhat.com>
4676
4677         * include/bits/regex.h (__regex_algo_impl): Change __policy and
4678         __match_mode template parameters to be function parameters.
4679         (regex_match, regex_search): Pass policy and match mode as
4680         function arguments.
4681         * include/bits/regex.tcc (__regex_algo_impl): Change template
4682         parameters to function parameters.
4683         * include/bits/regex_compiler.h (_RegexTranslatorBase): Use
4684         'if constexpr' for conditions using template parameters.
4685         (_RegexTranslator): Likewise.
4686         * include/bits/regex_executor.tcc (_Executor::_M_handle_accept):
4687         Likewise.
4688         * testsuite/util/testsuite_regex.h (regex_match_debug)
4689         (regex_search_debug): Move template arguments to function
4690         arguments.
4691
4692 2022-01-05  Jonathan Wakely  <jwakely@redhat.com>
4693
4694         * testsuite/util/testsuite_regex.h (regex_match_debug): Compare
4695         results even if the match failed.
4696
4697 2022-01-05  Jonathan Wakely  <jwakely@redhat.com>
4698
4699         * include/bits/regex_compiler.tcc: Adjust all calls to
4700         __throw_regex_error.
4701         * include/bits/regex_error.h (__throw_regex_error): Add noreturn
4702         attribute.
4703         * include/bits/regex_scanner.tcc: Likewise.
4704         * src/c++11/regex.cc (desc): New helper function.
4705         (regex_error::regex_error(error_type)): Use desc to get a string
4706         corresponding to the error code.
4707
4708 \f
4709 Copyright (C) 2022 Free Software Foundation, Inc.
4710
4711 Copying and distribution of this file, with or without modification,
4712 are permitted in any medium without royalty provided the copyright
4713 notice and this notice are preserved.