libstdc++-v3/ChangeLog

   1 2024-04-09  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         PR libstdc++/114633
   4         * include/bits/chrono_io.h (_Parser::operator()) <'S'>: Use
   5         stream extraction if std::from_chars is not available.
   6
   7 2024-04-08  Jonathan Wakely  <jwakely@redhat.com>
   8
   9         PR libstdc++/114519
  10         * include/bits/unicode.h (_Utf8_view) [!__cpp_char8_t]: Define
  11         using char instead of char8_t.
  12         * testsuite/ext/unicode/view.cc: Use u8""sv literals to create
  13         string views, instead of std::u8string_view.
  14
  15 2024-04-08  Jonathan Wakely  <jwakely@redhat.com>
  16
  17         * testsuite/20_util/integer_comparisons/equal_neg.cc: Use
  18         no-opts selector for errors that depend on -fchar8_t.
  19         * testsuite/20_util/integer_comparisons/greater_equal_neg.cc:
  20         Likewise.
  21         * testsuite/20_util/integer_comparisons/greater_neg.cc:
  22         Likewise.
  23         * testsuite/20_util/integer_comparisons/in_range_neg.cc:
  24         Likewise.
  25         * testsuite/20_util/integer_comparisons/less_equal_neg.cc:
  26         Likewise.
  27         * testsuite/20_util/integer_comparisons/less_neg.cc: Likewise.
  28         * testsuite/20_util/integer_comparisons/not_equal_neg.cc:
  29         Likewise.
  30         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc: Skip
  31         if -fno-char8_t is used.
  32         * testsuite/21_strings/headers/cuchar/functions_std_cxx20.cc:
  33         Likewise.
  34         * testsuite/27_io/basic_ostream/inserters_character/char/deleted.cc:
  35         Likewise.
  36         * testsuite/27_io/basic_ostream/inserters_character/wchar_t/deleted.cc:
  37         Likewise.
  38         * testsuite/27_io/filesystem/path/factory/u8path-depr.cc: Use
  39         char for u8 literal if char8_t is not available.
  40         * testsuite/27_io/headers/iosfwd/synopsis.cc: Check
  41         __cpp_char8_t.
  42         * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
  43         * testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc:
  44         Remove check for _GLIBCXX_USE_CHAR8_T.
  45
  46 2024-04-08  Jonathan Wakely  <jwakely@redhat.com>
  47
  48         * testsuite/20_util/from_chars/1_neg.cc: Add char8_t cases,
  49         using a struct of that name if -fno-char8_t is active.
  50         * testsuite/20_util/from_chars/1_c++20_neg.cc: Removed.
  51
  52 2024-04-03  Jonathan Wakely  <jwakely@redhat.com>
  53
  54         PR libstdc++/104606
  55         * include/std/optional (operator<=>(const optional<T>&, const U&)):
  56         Reverse order of three_way_comparable_with template arguments.
  57         * testsuite/20_util/optional/relops/104606.cc: New test.
  58
  59 2024-04-02  Jonathan Wakely  <jwakely@redhat.com>
  60
  61         PR libstdc++/114519
  62         * include/bits/unicode.h (_Utf8_view): Guard with check for
  63         char8_t being enabled.
  64         (__literal_encoding_is_unicode): Guard use of char8_t with check
  65         for it being enabled.
  66         * testsuite/std/format/functions/114519.cc: New test.
  67
  68 2024-04-02  Patrick Palka  <ppalka@redhat.com>
  69
  70         * include/std/ranges (ranges::__detail::_Empty): Rename to ...
  71         (ranges::__detail::_Absent): ... this.  Turn into a template
  72         parameterized by the absent type _Tp and discriminator _Disc.
  73         (ranges::__detail::__maybe_present_t): Add an optional
  74         discriminator parameter.
  75         (slide_view::_M_cached_begin): Pass a discriminator argument to
  76         __maybe_present_t.
  77         (slide_view::_M_cached_end): Likewise.
  78         * testsuite/std/ranges/adaptors/sizeof.cc: Verify the size of
  79         slide_view<V> is 3 instead 4 pointers.
  80
  81 2024-04-02  Jakub Jelinek  <jakub@redhat.com>
  82
  83         * acinclude.m4: Fix duplicated words; file file -> file can.
  84         * configure.host: Fix duplicated words; the the -> the.
  85
  86 2024-03-29  Arsen Arsenović  <arsen@aarsen.me>
  87
  88         * testsuite/24_iterators/range_generators/01.cc: Drop GCC
  89         Runtime Library Exception.
  90         * testsuite/24_iterators/range_generators/02.cc: Drop GCC
  91         Runtime Library Exception.
  92         * testsuite/24_iterators/range_generators/copy.cc: Drop GCC
  93         Runtime Library Exception.
  94         * testsuite/24_iterators/range_generators/except.cc: Drop GCC
  95         Runtime Library Exception.
  96         * testsuite/24_iterators/range_generators/subrange.cc: Drop GCC
  97         Runtime Library Exception.
  98         * testsuite/24_iterators/range_generators/synopsis.cc: Drop GCC
  99         Runtime Library Exception.
 100         * testsuite/24_iterators/range_generators/iter_deref_return.cc:
 101         Drop GCC Runtime Library Exception from the "You should have
 102         received a copy" paragraph.
 103
 104 2024-03-27  Matthias Kretz  <m.kretz@gsi.de>
 105
 106         * include/experimental/bits/simd_x86.h (_S_masked_unary):
 107         Cast inputs < 16 bytes to 16 byte vectors before calling the
 108         right subtraction builtin. Before returning, truncate to the
 109         return vector type.
 110
 111 2024-03-27  Matthias Kretz  <m.kretz@gsi.de>
 112
 113         * include/experimental/bits/simd_x86.h (_S_masked_unary): Call
 114         the 4- and 8-byte variants of __builtin_ia32_subp[ds] without
 115         rounding direction argument.
 116
 117 2024-03-27  Srinivas Yadav Singanaboina  <vasu.srinivasvasu.14@gmail.com>
 118
 119         * include/Makefile.am: Add simd_sve.h.
 120         * include/Makefile.in: Add simd_sve.h.
 121         * include/experimental/bits/simd.h: Add new SveAbi.
 122         * include/experimental/bits/simd_builtin.h: Use
 123         __no_sve_deduce_t to support existing Neon Abi.
 124         * include/experimental/bits/simd_converter.h: Convert
 125         sequentially when sve is available.
 126         * include/experimental/bits/simd_detail.h: Define sve
 127         specific macro.
 128         * include/experimental/bits/simd_math.h: Fallback frexp
 129         to execute sequntially when sve is available, to handle
 130         fixed_size_simd return type that always uses sve.
 131         * include/experimental/simd: Include bits/simd_sve.h.
 132         * testsuite/experimental/simd/tests/bits/main.h: Enable
 133         testing for sve128, sve256, sve512.
 134         * include/experimental/bits/simd_sve.h: New file.
 135
 136 2024-03-26  Arsen Arsenović  <arsen@aarsen.me>
 137
 138         * include/std/generator (generator::_Iterator::operator*): Fix
 139         return type.
 140         * testsuite/24_iterators/range_generators/iter_deref_return.cc:
 141         New test.
 142
 143 2024-03-26  Arsen Arsenović  <arsen@aarsen.me>
 144
 145         * include/std/generator: Fix _V badname.
 146
 147 2024-03-26  Jonathan Wakely  <jwakely@redhat.com>
 148
 149         * testsuite/19_diagnostics/stacktrace/current.cc: Check for
 150         __cpp_lib_stacktrace instead of check for stacktrace ET.
 151         * testsuite/19_diagnostics/stacktrace/entry.cc: Likewise.
 152         * testsuite/19_diagnostics/stacktrace/hash.cc: Likewise.
 153         * testsuite/19_diagnostics/stacktrace/output.cc: Likewise.
 154         * testsuite/19_diagnostics/stacktrace/stacktrace.cc: Likewise.
 155         * testsuite/19_diagnostics/stacktrace/synopsis.cc: Likewise.
 156         * testsuite/19_diagnostics/stacktrace/version.cc: Likewise.
 157         * testsuite/23_containers/vector/debug/assign4_backtrace_neg.cc:
 158         Likewise.
 159         * testsuite/lib/libstdc++.exp (check_effective_target_stacktrace):
 160         Remove.
 161
 162 2024-03-26  Jonathan Wakely  <jwakely@redhat.com>
 163
 164         * testsuite/lib/dg-options.exp (dg-require-cpp-feature-test):
 165         New proc.
 166         * testsuite/lib/libstdc++.exp (check_v3_target_cpp_feature_test):
 167         New proc.
 168         * testsuite/std/text_encoding/cons.cc: Use new directive to skip
 169         the test if the __cpp_lib_text_encoding feature test macro is
 170         not defined.
 171         * testsuite/std/text_encoding/requirements.cc: Likewise.
 172
 173 2024-03-25  Jonathan Wakely  <jwakely@redhat.com>
 174
 175         * testsuite/std/text_encoding/requirements.cc: #undef the
 176         correct macro.
 177
 178 2024-03-23  Jonathan Wakely  <jwakely@redhat.com>
 179
 180         * include/std/format (formatter): Disable specializations that
 181         would allow sequences of narrow characters to be formatted as
 182         wchar_t without conversion, as per LWG 3944.
 183         * testsuite/std/format/formatter/lwg3944.cc: New test.
 184
 185 2024-03-23  Jonathan Wakely  <jwakely@redhat.com>
 186
 187         * include/bits/utility.h (__is_in_place_index_v): New variable
 188         template.
 189         * include/std/variant (__not_in_place_tag): Define in terms of
 190         variable templates not a class template.
 191
 192 2024-03-23  Jonathan Wakely  <jwakely@redhat.com>
 193
 194         PR libstdc++/114400
 195         * include/std/string_view (operator==): Use std::type_identity_t
 196         in C++20 instead of our own __type_identity_t.
 197
 198 2024-03-22  Jonathan Wakely  <jwakely@redhat.com>
 199
 200         PR libstdc++/114401
 201         * include/bits/hashtable.h (_Hashtable::_M_reinsert_node): Call
 202         release() on node handle instead of just zeroing its pointer.
 203         (_Hashtable::_M_reinsert_node_multi): Likewise.
 204         (_Hashtable::_M_merge_unique): Likewise.
 205         (_Hashtable::_M_merge_multi): Likewise.
 206         * include/bits/node_handle.h (_Node_handle_common::release()):
 207         New member function.
 208         (_Node_handle_common::_Optional_alloc::_M_empty): Remove
 209         unnecessary union member.
 210         (_Node_handle_common): Declare _Hashtable as a friend.
 211         * include/bits/stl_tree.h (_Rb_tree::_M_reinsert_node_unique):
 212         Call release() on node handle instead of just zeroing its
 213         pointer.
 214         (_Rb_tree::_M_reinsert_node_equal): Likewise.
 215         (_Rb_tree::_M_reinsert_node_hint_unique): Likewise.
 216         (_Rb_tree::_M_reinsert_node_hint_equal): Likewise.
 217         * testsuite/23_containers/multiset/modifiers/114401.cc: New test.
 218         * testsuite/23_containers/set/modifiers/114401.cc: New test.
 219         * testsuite/23_containers/unordered_multiset/modifiers/114401.cc: New test.
 220         * testsuite/23_containers/unordered_set/modifiers/114401.cc: New test.
 221
 222 2024-03-22  Jonathan Wakely  <jwakely@redhat.com>
 223
 224         PR libstdc++/113841
 225         * include/bits/allocator.h (allocator<cv T>): Add default
 226         constructor to partial specializations for cv-qualified types.
 227         * include/bits/stl_vector.h (_Vector_impl::_Vector_impl()):
 228         Constrain so that it's only present if the allocator is default
 229         constructible.
 230         * include/bits/stl_bvector.h (_Bvector_impl::_Bvector_impl()):
 231         Likewise.
 232         * testsuite/23_containers/vector/cons/113841.cc: New test.
 233
 234 2024-03-22  Jonathan Wakely  <jwakely@redhat.com>
 235
 236         * include/bits/stl_construct.h (destroy_at, construct_at): Guard
 237         with feature test macros instead of just __cplusplus.
 238
 239 2024-03-22  Jonathan Wakely  <jwakely@redhat.com>
 240
 241         * include/bits/version.def (generator, tuple_like): Move earlier
 242         in the file.
 243         * include/bits/version.h: Regenerate.
 244
 245 2024-03-22  Jonathan Wakely  <jwakely@redhat.com>
 246
 247         PR libstdc++/114394
 248         * include/std/functional (bind): Use __invoke_result_t instead
 249         of result_of::type.
 250         * include/std/type_traits (__invoke_result_t): New alias
 251         template.
 252         * testsuite/20_util/bind/ref_neg.cc: Adjust prune pattern.
 253
 254 2024-03-20  François Dumont  <fdumont@gcc.gnu.org>
 255
 256         * include/bits/version.def (null_iterators): Remove extra_cond.
 257         * include/bits/version.h: Regenerate.
 258
 259 2024-03-19  Jonathan Wakely  <jwakely@redhat.com>
 260
 261         PR libstdc++/114359
 262         * include/bits/random.tcc (binomial_distribution::param_type):
 263         Ensure arithmetic is done as type double.
 264         * testsuite/26_numerics/random/binomial_distribution/114359.cc: New test.
 265
 266 2024-03-19  Jonathan Wakely  <jwakely@redhat.com>
 267
 268         PR libstdc++/101228
 269         * include/pstl/parallel_backend_tbb.h (TBB_SUPPRESS_DEPRECATED_MESSAGES):
 270         Define before including <tbb/task.h> then undef afterwards.
 271
 272 2024-03-19  Jonathan Wakely  <jwakely@redhat.com>
 273
 274         * include/Makefile.am [MAINTAINER_MODE]: Add target to
 275         automatically update <bits/version.h>.
 276         * include/Makefile.in: Regenerate.
 277
 278 2024-03-19  Jonathan Wakely  <jwakely@redhat.com>
 279
 280         * doc/xml/manual/build_hacking.xml: Document generated files.
 281         Update list of convenience libraries and sub-directories under
 282         the src directory.
 283         * doc/html/*: Regenerate.
 284
 285 2024-03-19  Jonathan Wakely  <jwakely@redhat.com>
 286
 287         * include/bits/text_encoding-data.h: Regenerate.
 288         * include/bits/unicode-data.h: Regenerate.
 289         * scripts/gen_text_encoding_data.py: Fix header of generated
 290         file to name the correct script.
 291
 292 2024-03-19  Jonathan Wakely  <jwakely@redhat.com>
 293
 294         * testsuite/util/pstl/test_utils.h: Fix typos in comments.
 295
 296 2024-03-19  Jonathan Wakely  <jwakely@redhat.com>
 297
 298         PR libstdc++/114367
 299         * include/bits/stl_bvector.h (_M_allocate): Use allocator's
 300         construct function to begin lifetime of words.
 301
 302 2024-03-19  Iain Sandoe  <iain@sandoe.co.uk>
 303
 304         * testsuite/lib/dg-options.exp (atomic_link_flags): Emit a -B
 305         option for the path to the uninstalled libatomic.
 306
 307 2024-03-19  Iain Sandoe  <iain@sandoe.co.uk>
 308
 309         * testsuite/lib/libstdc++.exp (v3_target_compile): Instead of
 310         /dev/null, use a temporary file for test executables on Darwin.
 311
 312 2024-03-18  François Dumont  <fdumont@gcc.gnu.org>
 313
 314         * include/debug/safe_iterator.tcc (_Safe_iterator<>::_M_can_advance):
 315         Accept 0 offset advance on value-initialized iterator.
 316         * testsuite/23_containers/vector/debug/n3644.cc: New test case.
 317
 318 2024-03-18  François Dumont  <fdumont@gcc.gnu.org>
 319
 320         * include/debug/safe_local_iterator.tcc
 321         (_Safe_local_iterator::_M_valid_range): Add _M_value_initialized and
 322         _M_singular checks.
 323         * testsuite/23_containers/unordered_set/debug/114316.cc: New test case.
 324
 325 2024-03-17  François Dumont  <fdumont@gcc.gnu.org>
 326
 327         PR libstdc++/114316
 328         * include/debug/safe_iterator.tcc (_Safe_iterator<>::_M_valid_range):
 329         First check if both iterators are value-initialized before checking if
 330         singular.
 331         * testsuite/23_containers/set/debug/114316.cc: New test case.
 332         * testsuite/23_containers/vector/debug/114316.cc: New test case.
 333
 334 2024-03-14  Jonathan Wakely  <jwakely@redhat.com>
 335
 336         PR libstdc++/114325
 337         * include/std/format (_Scanner::_M_scan): Pass correct length to
 338         __to_chars_10_impl.
 339         * testsuite/std/format/functions/format.cc: Check negative
 340         integers with empty format-spec.
 341
 342 2024-03-14  Jonathan Wakely  <jwakely@redhat.com>
 343
 344         * include/bits/stl_algo.h (find_end, all_of, none_of, any_of)
 345         (find_if_not, is_partitioned, partition_point, remove)
 346         (remove_if, unique, lower_bound, upper_bound, equal_range)
 347         (binary_search, includes, is_sorted, is_sorted_until, minmax)
 348         (minmax_element, is_permutation, clamp, find_if, find_first_of)
 349         (adjacent_find, count, count_if, search, search_n, min_element)
 350         (max_element): Add nodiscard attribute.
 351         * include/bits/stl_algobase.h (min, max, lower_bound, equal)
 352         (lexicographical_compare, lexicographical_compare_three_way)
 353         (mismatch): Likewise.
 354         * include/bits/stl_heap.h (is_heap, is_heap_until): Likewise.
 355         * testsuite/25_algorithms/equal/debug/1_neg.cc: Add dg-warning.
 356         * testsuite/25_algorithms/equal/debug/2_neg.cc: Likewise.
 357         * testsuite/25_algorithms/equal/debug/3_neg.cc: Likewise.
 358         * testsuite/25_algorithms/find_first_of/concept_check_1.cc:
 359         Likewise.
 360         * testsuite/25_algorithms/is_permutation/2.cc: Likewise.
 361         * testsuite/25_algorithms/lexicographical_compare/71545.cc:
 362         Likewise.
 363         * testsuite/25_algorithms/lower_bound/33613.cc: Likewise.
 364         * testsuite/25_algorithms/lower_bound/debug/irreflexive.cc:
 365         Likewise.
 366         * testsuite/25_algorithms/lower_bound/debug/partitioned_neg.cc:
 367         Likewise.
 368         * testsuite/25_algorithms/lower_bound/debug/partitioned_pred_neg.cc:
 369         Likewise.
 370         * testsuite/25_algorithms/minmax/3.cc: Likewise.
 371         * testsuite/25_algorithms/search/78346.cc: Likewise.
 372         * testsuite/25_algorithms/search_n/58358.cc: Likewise.
 373         * testsuite/25_algorithms/unique/1.cc: Likewise.
 374         * testsuite/25_algorithms/unique/11480.cc: Likewise.
 375         * testsuite/25_algorithms/upper_bound/33613.cc: Likewise.
 376         * testsuite/25_algorithms/upper_bound/debug/partitioned_neg.cc:
 377         Likewise.
 378         * testsuite/25_algorithms/upper_bound/debug/partitioned_pred_neg.cc:
 379         Likewise.
 380         * testsuite/ext/concept_checks.cc: Likewise.
 381         * testsuite/ext/is_heap/47709.cc: Likewise.
 382         * testsuite/ext/is_sorted/cxx0x.cc: Likewise.
 383
 384 2024-03-14  xndcn  <xndchn@gmail.com>
 385
 386         * include/bits/atomic_base.h (__atomic_float::__atomic_float(Fp)):
 387         Clear padding.
 388         * testsuite/29_atomics/atomic_float/compare_exchange_padding.cc:
 389         New test.
 390
 391 2024-03-14  Jonathan Wakely  <jwakely@redhat.com>
 392
 393         PR libstdc++/66146
 394         * doc/xml/manual/status_cxx2011.xml: Remove mention of Linux in
 395         note about std::call_once.
 396         * doc/xml/manual/status_cxx2014.xml: Likewise.
 397         * doc/xml/manual/status_cxx2017.xml: Likewise.
 398         * doc/html/manual/status.html: Regenerate.
 399
 400 2024-03-14  Jonathan Wakely  <jwakely@redhat.com>
 401
 402         * doc/xml/manual/status_cxx2023.xml: Update C++23 status table.
 403         * doc/html/manual/status.html: Regenerate.
 404         * include/bits/version.def: Fix typo in comment.
 405
 406 2024-03-13  Jonathan Wakely  <jwakely@redhat.com>
 407
 408         * testsuite/libstdc++-prettyprinters/cxx11.cc: Move custom_cat
 409         to namespace scope.
 410
 411 2024-03-13  Jonathan Wakely  <jwakely@redhat.com>
 412
 413         * doc/xml/manual/debug.xml: Improve docs on debug builds and
 414         using ASan. Mention _GLIBCXX_ASSERTIONS. Reorder sections to put
 415         the most relevant ones first.
 416         * doc/xml/manual/using.xml: Add comma.
 417         * doc/html/*: Regenerate.
 418
 419 2024-03-13  Jonathan Wakely  <jwakely@redhat.com>
 420
 421         * doc/xml/manual/debug.xml: Document that concept checking might
 422         be removed in future.
 423         * doc/xml/manual/extensions.xml: Likewise.
 424
 425 2024-03-09  Jonathan Wakely  <jwakely@redhat.com>
 426
 427         PR libstdc++/114240
 428         * include/bits/chrono_io.h (_Parser::operator()): Assume
 429         hours(0) for a time_point, so that a time is not required
 430         to be present.
 431         * testsuite/std/time/parse/114240.cc: New test.
 432
 433 2024-03-09  Jonathan Wakely  <jwakely@redhat.com>
 434
 435         PR libstdc++/114279
 436         * include/bits/chrono_io.h (_Parser::_M_is_leap_second): New
 437         data member.
 438         (_Parser::_M_reserved): Reserve padding bits for future use.
 439         (_Parser::operator()): Set _M_is_leap_second if %S reads 60s.
 440         (from_stream): Only allow _M_is_leap_second for utc_time and
 441         local_time. Adjust arithmetic for utc_time so that leap seconds
 442         are preserved. Use time_point_cast to convert to a possibly
 443         lower-precision result type.
 444         * testsuite/std/time/parse.cc: Move to ...
 445         * testsuite/std/time/parse/parse.cc: ... here.
 446         * testsuite/std/time/parse/114279.cc: New test.
 447
 448 2024-03-07  Jonathan Wakely  <jwakely@redhat.com>
 449
 450         * include/bits/chrono_io.h (_Parser::operator()): Use
 451         std::from_chars to parse fractional seconds.
 452
 453 2024-03-07  Jonathan Wakely  <jwakely@redhat.com>
 454
 455         PR libstdc++/114244
 456         * include/bits/chrono_io.h (_Parser::operator()): Remove
 457         redundant uses of duration_cast. Use chrono::round to convert
 458         long double value to durations with integer representations.
 459         Check represenation type when deciding whether to skip parsing
 460         fractional seconds.
 461         * testsuite/20_util/duration/114244.cc: New test.
 462         * testsuite/20_util/duration/io.cc: Check that a floating-point
 463         duration with ratio<1> precision can be parsed.
 464
 465 2024-03-07  Jonathan Wakely  <jwakely@redhat.com>
 466
 467         PR libstdc++/114103
 468         * include/bits/version.def (atomic_lock_free_type_aliases): Add
 469         extra_cond to check for at least one always-lock-free type.
 470         * include/bits/version.h: Regenerate.
 471         * include/std/atomic (atomic_signed_lock_free)
 472         (atomic_unsigned_lock_free): Only use always-lock-free types.
 473         * src/c++20/tzdb.cc (time_zone::_Impl::RulesCounter): Don't use
 474         atomic counter if lock-free aliases aren't available.
 475         * testsuite/29_atomics/atomic/lock_free_aliases.cc: XFAIL for
 476         targets without lock-free word-size compare_exchange.
 477
 478 2024-03-07  Jonathan Wakely  <jwakely@redhat.com>
 479
 480         * include/std/chrono (__get_leap_second_info): Update expiry
 481         time for hardcoded list of leap seconds.
 482         * testsuite/std/time/tzdb/leap_seconds.cc: Update comment.
 483
 484 2024-03-07  Jonathan Wakely  <jwakely@redhat.com>
 485
 486         * testsuite/23_containers/deque/allocator/default_init.cc: Use
 487         std::memset instead of __builtin_memset.
 488         * testsuite/23_containers/forward_list/allocator/default_init.cc:
 489         Likewise.
 490         * testsuite/23_containers/list/allocator/default_init.cc:
 491         Likewise.
 492         * testsuite/23_containers/map/allocator/default_init.cc:
 493         Likewise.
 494         * testsuite/23_containers/set/allocator/default_init.cc:
 495         Likewise.
 496         * testsuite/23_containers/unordered_map/allocator/default_init.cc:
 497         Likewise.
 498         * testsuite/23_containers/unordered_set/allocator/default_init.cc:
 499         Likewise.
 500         * testsuite/23_containers/vector/allocator/default_init.cc:
 501         Likewise.
 502         * testsuite/23_containers/vector/bool/allocator/default_init.cc:
 503         Likewise.
 504         * testsuite/29_atomics/atomic/compare_exchange_padding.cc:
 505         Likewise.
 506         * testsuite/util/atomic/wait_notify_util.h: Likewise.
 507
 508 2024-03-07  Jonathan Wakely  <jwakely@redhat.com>
 509
 510         * include/std/format (_Arg_store::_S_make_elt): Add two
 511         static_assert checks to give more user-friendly error messages.
 512         * testsuite/lib/prune.exp (libstdc++-dg-prune): Prune another
 513         form of "in requirements with" note.
 514         * testsuite/std/format/arguments/args_neg.cc: Check for
 515         user-friendly diagnostics for non-formattable types.
 516         * testsuite/std/format/string_neg.cc: Likewise.
 517
 518 2024-03-04  Jonathan Wakely  <jwakely@redhat.com>
 519
 520         PR libstdc++/114147
 521         * include/std/tuple (tuple::tuple(allocator_arg_t, const Alloc&)):
 522         Add missing overload of allocator-extended default constructor.
 523         (tuple<T1,T2>::tuple(allocator_arg_t, const Alloc&)): Likewise.
 524         * testsuite/20_util/tuple/cons/114147.cc: New test.
 525
 526 2024-02-29  Jonathan Wakely  <jwakely@redhat.com>
 527
 528         * include/std/format (basic_format_arg::handle::__maybe_const_t):
 529         Fix condition to check if const type is formattable.
 530         (basic_format_arg::handle::handle(T&)): Remove redundant
 531         static_assert.
 532         * testsuite/std/format/formatter/basic.cc: New test.
 533
 534 2024-02-29  Jonathan Wakely  <jwakely@redhat.com>
 535
 536         PR libstdc++/113960
 537         * include/bits/stl_algobase.h (__is_byte_iter): Replace with ...
 538         (__memcmp_ordered_with): New concept.
 539         (lexicographical_compare_three_way): Use __memcmp_ordered_with
 540         instead of __is_byte_iter. Use correct length for memcmp.
 541         * testsuite/25_algorithms/lexicographical_compare_three_way/113960.cc:
 542         New test.
 543
 544 2024-02-28  Jonathan Wakely  <jwakely@redhat.com>
 545
 546         PR libstdc++/114152
 547         * include/experimental/scope (scope_exit scope_fail): Make
 548         destructor unconditionally noexcept.
 549         (scope_sucess): Fix noexcept-specifier.
 550         * testsuite/experimental/scopeguard/114152.cc: New test.
 551
 552 2024-02-28  Jonathan Wakely  <jwakely@redhat.com>
 553
 554         * doc/xml/manual/appendix_contributing.xml: Change URLs to use
 555         https.
 556         * doc/html/manual/*: Regenerate.
 557
 558 2024-02-28  Jonathan Wakely  <jwakely@redhat.com>
 559
 560         * doc/xml/manual/appendix_contributing.xml: Replace outdated
 561         info on ChangeLog entries.
 562         * doc/html/manual/appendix_contributing.html: Regenerate.
 563
 564 2024-02-28  Jonathan Wakely  <jwakely@redhat.com>
 565
 566         * include/bits/stl_bvector.h (vector<bool, A>::at): Add
 567         nodiscard.
 568         * include/bits/stl_vector.h (vector<T, A>::at): Likewise.
 569         (operator==, operator<=>, operator<, operator!=, operator>)
 570         (operator<=, operator>=): Likewise.
 571         * include/debug/vector (operator==, operator<=>, operator<)
 572         (operator!=, operator>, operator<=, operator>=): Likewise.
 573         * testsuite/23_containers/vector/nodiscard.cc: New test.
 574
 575 2024-02-28  Jonathan Wakely  <jwakely@redhat.com>
 576
 577         * include/bits/atomic_base.h (operator|, operator&): Add
 578         noexcept.
 579         * include/bits/fs_fwd.h (operator&, operator|, operator^)
 580         (operator~): Add nodiscard to overloads for copy_options, perms,
 581         perm_options, and directory_options.
 582         * include/bits/ios_base.h (operator&, operator|, operator^)
 583         (operator~): Add nodiscard and noexcept to overloads for
 584         _Ios_Fmtflags, _Ios_Openmode, and _Ios_Iostate.
 585         (operator|=, operator&=, operator^=): Add constexpr for C++14.
 586         * include/bits/regex_constants.h (operator&, operator|, operator^)
 587         (operator~): Add nodiscard and noexcept to overloads for
 588         syntax_option_type and match_flag_type.
 589         (operator|=, operator&=, operator^=): Add noexcept.
 590         * include/std/charconv (operator&, operator|, operator^)
 591         (operator~): Add nodiscard to overloads for chars_format.
 592         * include/std/future (operator&, operator|, operator^)
 593         (operator~): Add nodiscard for overloads for launch.
 594         (operator&=, operator|=, operator^=): Add constexpr for C++14.
 595         * include/experimental/bits/fs_fwd.h  (operator&, operator|)
 596         (operator^, operator~): Add nodiscard to overloads for
 597         copy_options, perms, and directory_options.
 598         * testsuite/27_io/ios_base/types/fmtflags/bitmask_operators.cc:
 599         Add dg-warning for nodiscard warnings.
 600         * testsuite/27_io/ios_base/types/iostate/bitmask_operators.cc:
 601         Likewise.
 602         * testsuite/27_io/ios_base/types/openmode/bitmask_operators.cc:
 603         Likewise.
 604         * testsuite/27_io/filesystem/operations/bitmask_types.cc:
 605         New test.
 606
 607 2024-02-28  Jonathan Wakely  <jwakely@redhat.com>
 608
 609         * testsuite/27_io/basic_ostream/print/1.cc: Check error
 610         handling.
 611         * testsuite/27_io/print/1.cc: Likewise.
 612
 613 2024-02-28  Jonathan Wakely  <jwakely@redhat.com>
 614
 615         * include/std/ostream (vprint_unicode) [__CYGWIN__]: Use POSIX
 616         code path for Cygwin instead of Windows.
 617         * include/std/print (vprint_unicode) [__CYGWIN__]: Likewise.
 618         * testsuite/27_io/basic_ostream/print/1.cc: Only add -lstdc++exp
 619         for *-*-mingw* targets.
 620         * testsuite/27_io/print/1.cc: Likewise.
 621
 622 2024-02-28  Jonathan Wakely  <jwakely@redhat.com>
 623
 624         * include/bits/alloc_traits.h: Include <bits/stl_iterator.h> for
 625         __make_move_if_noexcept_iterator.
 626
 627 2024-02-28  Jonathan Wakely  <jwakely@redhat.com>
 628
 629         * include/std/stacktrace: Add nodiscard attribute to all
 630         functions without side effects.
 631
 632 2024-02-20  François Dumont  <fdumont@gcc.gnu.org>
 633
 634         * include/bits/stl_algobase.h (std::__niter_wrap): Add a call to
 635         std::__niter_base on res iterator.
 636
 637 2024-02-19  Iain Sandoe  <iain@sandoe.co.uk>
 638             Jonathan Wakely  <jwakely@redhat.com>
 639
 640         PR target/112397
 641         * configure: Regenerate.
 642         * configure.ac: Detect if we are building for Darwin.
 643         * libsupc++/Makefile.am: If we are building for Darwin, then
 644         suppress hot/cold partitioning for the array allocators.
 645         * libsupc++/Makefile.in: Regenerated.
 646
 647 2024-02-17  François Dumont  <fdumont@gcc.gnu.org>
 648
 649         * include/bits/stl_algobase.h (std::__niter_base): Redefine the overload
 650         definitions for __gnu_debug::_Safe_iterator.
 651         * include/debug/safe_iterator.tcc (std::__niter_base): Adapt declarations.
 652
 653 2024-02-16  Jonathan Wakely  <jwakely@redhat.com>
 654
 655         PR libstdc++/87744
 656         PR libstdc++/113961
 657         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
 658         line number.
 659
 660 2024-02-16  Jonathan Wakely  <jwakely@redhat.com>
 661
 662         PR libstdc++/87744
 663         PR libstdc++/113931
 664         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
 665         line number.
 666
 667 2024-02-16  Jonathan Wakely  <jwakely@redhat.com>
 668
 669         * doc/xml/manual/debug_mode.xml: Update docs for backtraces.
 670         * doc/html/manual/debug_mode_using.html: Regenerate.
 671
 672 2024-02-16  Jonathan Wakely  <jwakely@redhat.com>
 673
 674         * doc/xml/manual/test.xml: Fix spelling of <envar> elements.
 675         * doc/html/manual/test.html: Regenerate.
 676
 677 2024-02-15  Jonathan Wakely  <jwakely@redhat.com>
 678
 679         PR libstdc++/113806
 680         * include/std/bitset (bitset::operator>>=): Remove redundant
 681         call to _M_do_sanitize.
 682
 683 2024-02-15  Jonathan Wakely  <jwakely@redhat.com>
 684
 685         PR libstdc++/113807
 686         * include/std/bitset (bitset::set()): Use memset instead of a
 687         loop over the individual words.
 688
 689 2024-02-15  Jonathan Wakely  <jwakely@redhat.com>
 690
 691         PR libstdc++/113811
 692         * include/bits/stl_algo.h (__rotate): Use unsigned values for
 693         division.
 694
 695 2024-02-15  Jonathan Wakely  <jwakely@redhat.com>
 696
 697         PR libstdc++/99117
 698         * include/std/valarray (valarray::operator=(const _Expr&)):
 699         Use loop to copy instead of __valarray_copy with _Array.
 700         * testsuite/26_numerics/valarray/99117.cc: New test.
 701
 702 2024-02-15  Jonathan Wakely  <jwakely@redhat.com>
 703
 704         * src/c++20/tzdata.zi: Import new file from 2024a release.
 705         * src/c++20/tzdb.cc (tzdb_list::_Node::_S_read_leap_seconds)
 706         Update expiry date for leap seconds list.
 707
 708 2024-02-15  Jonathan Wakely  <jwakely@redhat.com>
 709
 710         PR libstdc++/87744
 711         * include/bits/random.h [!__SIZEOF_INT128__] (_Select_uint_least_t):
 712         Define specialization for 64-bit generators with
 713         non-power-of-two modulus and large constants.
 714         (__mod): Use if constexpr unconditionally.
 715         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
 716         line number.
 717         * testsuite/26_numerics/random/linear_congruential_engine/87744.cc:
 718         New test.
 719
 720 2024-02-14  Gerald Pfeifer  <gerald@pfeifer.com>
 721
 722         * doc/xml/manual/status_cxx2023.xml: Fix C++ item p2442 to be
 723         version 1.
 724         * doc/html/manual/status.html: Regenerate.
 725
 726 2024-02-12  Paul Keir  <paul.keir@uws.ac.uk>
 727
 728         PR libstdc++/113294
 729         * include/bits/basic_string.h (basic_string::operator=): Use
 730         _M_use_local_data() instead of _M_local_buf on the moved-from
 731         string.
 732         * testsuite/21_strings/basic_string/modifiers/constexpr.cc
 733         (test_move): New test.
 734
 735 2024-02-09  Ken Matsui  <kmatsui@gcc.gnu.org>
 736
 737         * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_IS_SAME):
 738         Removed.
 739         * include/std/type_traits (is_same): Use
 740         _GLIBCXX_USE_BUILTIN_TRAIT instead of
 741         _GLIBCXX_HAVE_BUILTIN_IS_SAME.
 742         (is_same_v): Likewise.
 743
 744 2024-02-08  Jonathan Wakely  <jwakely@redhat.com>
 745
 746         * include/bits/shared_ptr_atomic.h: Fix typo in comment.
 747
 748 2024-02-08  Jonathan Wakely  <jwakely@redhat.com>
 749
 750         PR libstdc++/100147
 751         * include/bits/gslice.h (operator=): Add comment about lack of
 752         self-assignment check.
 753
 754 2024-02-08  Jonathan Wakely  <jwakely@redhat.com>
 755
 756         * include/tr2/type_traits (bases, direct_bases): Use
 757         __has_builtin to check if required built-ins are supported.
 758
 759 2024-02-07  Patrick Palka  <ppalka@redhat.com>
 760
 761         PR testsuite/113710
 762         PR c++/113814
 763         * include/bits/stl_pair.h (tuple_element): Add forward
 764         declaration of the partial specialization for tuple.
 765
 766 2024-02-06  Torbjörn SVENSSON  <torbjorn.svensson@foss.st.com>
 767
 768         * testsuite/lib/libstdc++.exp: Use "nul" for Windows, "/dev/null"
 769         for other environments.
 770
 771 2024-02-04  Jonathan Wakely  <jwakely@redhat.com>
 772
 773         * include/std/format (__format::_Spec::_M_reserved): Define new
 774         bit-field members to reserve padding bits for future extensions.
 775
 776 2024-02-04  Jonathan Wakely  <jwakely@redhat.com>
 777
 778         * src/experimental/Makefile.am: Use libstdc++fsconvenience.a
 779         instead of libstdc++fs.a.
 780         * src/experimental/Makefile.in: Regenerate.
 781         * src/filesystem/Makefile.am: Build libstdc++fsconvenience.a as
 782         well.
 783         * src/filesystem/Makefile.in: Regenerate.
 784
 785 2024-02-04  Jonathan Wakely  <jwakely@redhat.com>
 786
 787         * include/bits/text_encoding-data.h: Regenerate.
 788         * include/bits/unicode-data.h: Regenerate.
 789         * scripts/gen_text_encoding_data.py: Add copyright and license
 790         text to the output.
 791
 792 2024-02-02  Jonathan Wakely  <jwakely@redhat.com>
 793
 794         PR libstdc++/113335
 795         * include/bits/std_function.h (__function_guide_helper): Add
 796         partial specialization for explicit object member functions, as
 797         per LWG 3617.
 798         * testsuite/20_util/function/cons/deduction_c++23.cc: Check
 799         explicit object member functions.
 800         * testsuite/30_threads/packaged_task/cons/deduction_c++23.cc:
 801         Likewise.
 802
 803 2024-02-02  Jonathan Wakely  <jwakely@redhat.com>
 804
 805         * testsuite/17_intro/names.cc [_AIX]: Undefine "u".
 806
 807 2024-02-02  Jonathan Wakely  <jwakely@redhat.com>
 808
 809         * include/experimental/internet (network_v6::network): Define.
 810         (network_v6::hosts): Finish implementing.
 811         (network_v6::to_string): Do not concatenate std::string to
 812         arbitrary std::basic_string specialization.
 813         * testsuite/experimental/net/internet/network/v6/cons.cc: New
 814         test.
 815
 816 2024-02-02  Jonathan Wakely  <jwakely@redhat.com>
 817
 818         PR libstdc++/90276
 819         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: Fix
 820         comparison function to use less-than instead of equality.
 821
 822 2024-02-02  Jonathan Wakely  <jwakely@redhat.com>
 823
 824         PR libstdc++/90276
 825         * testsuite/util/pstl/test_utils.h (reverse_invoker): Do not use
 826         perfect forwarding for iterator arguments.
 827
 828 2024-02-02  Jonathan Wakely  <jwakely@redhat.com>
 829
 830         * include/std/string_view (basic_string_view(R&&)): Remove
 831         constraint that traits_type must be the same, as per LWG 3857.
 832         * testsuite/21_strings/basic_string_view/cons/char/range_c++20.cc:
 833         Explicit conversion between different specializations should be
 834         allowed.
 835         * testsuite/21_strings/basic_string_view/cons/wchar_t/range_c++20.cc:
 836         Likewise.
 837
 838 2024-02-02  Jonathan Wakely  <jwakely@redhat.com>
 839
 840         * include/std/syncstream (basic_osyncstream::operator=): Remove
 841         noexcept, as per LWG 3867.
 842
 843 2024-02-02  Jonathan Wakely  <jwakely@redhat.com>
 844
 845         * include/std/generator (promise_type::yield_value): Remove
 846         noexcept from fourth overload, as per LWG 3894.
 847
 848 2024-02-01  Patrick Palka  <ppalka@redhat.com>
 849
 850         PR libstdc++/113309
 851         PR libstdc++/109203
 852         * include/bits/ranges_util.h (__detail::__pair_like): Don't
 853         define in C++23 mode.
 854         (__detail::__pair_like_convertible_from): Adjust as per P2165R4.
 855         (__detail::__is_subrange<subrange>): Moved from <ranges>.
 856         (__detail::__is_tuple_like_v<subrange>): Likewise.
 857         * include/bits/stl_iterator.h: Include <bits/utility.h> for
 858         C++23.
 859         (__different_from): Move to <concepts>.
 860         (__iter_key_t): Adjust for C++23 as per P2165R4.
 861         (__iter_val_t): Likewise.
 862         * include/bits/stl_pair.h (pair, array): Forward declare.
 863         (get): Forward declare all overloads relevant to P2165R4
 864         tuple-like constructors.
 865         (__is_tuple_v): Define for C++23.
 866         (__is_tuple_like_v): Define for C++23.
 867         (__tuple_like): Define for C++23 as per P2165R4.
 868         (__pair_like): Define for C++23 as per P2165R4.
 869         (__eligibile_tuple_like): Define for C++23.
 870         (__eligibile_pair_like): Define for C++23.
 871         (pair::_S_constructible_from_pair_like): Define for C++23.
 872         (pair::_S_convertible_from_pair_like): Define for C++23.
 873         (pair::_S_dangles_from_pair_like): Define for C++23.
 874         (pair::pair): Define overloads taking a tuple-like type for
 875         C++23 as per P2165R4.
 876         (pair::_S_assignable_from_tuple_like): Define for C++23.
 877         (pair::_S_const_assignable_from_tuple_like): Define for C++23.
 878         (pair::operator=): Define overloads taking a tuple-like type for
 879         C++23 as per P2165R4.
 880         * include/bits/utility.h (ranges::__detail::__is_subrange):
 881         Moved from <ranges>.
 882         * include/bits/version.def (tuple_like): Define for C++23.
 883         * include/bits/version.h: Regenerate.
 884         * include/std/concepts (__different_from): Moved from
 885         <bits/stl_iterator.h>.
 886         (ranges::__swap::__adl_swap): Clarify which __detail namespace.
 887         * include/std/map (__cpp_lib_tuple_like): Define C++23.
 888         * include/std/ranges (__detail::__is_subrange): Moved to
 889         <bits/utility.h>.
 890         (__detail::__is_subrange<subrange>): Moved to <bits/ranges_util.h>
 891         (__detail::__has_tuple_element): Adjust for C++23 as per P2165R4.
 892         (__detail::__tuple_or_pair): Remove as per P2165R4.  Replace all
 893         uses with plain tuple as per P2165R4.
 894         * include/std/tuple (__cpp_lib_tuple_like): Define for C++23.
 895         (__tuple_like_tag_t): Define for C++23.
 896         (__tuple_cmp): Forward declare for C++23.
 897         (_Tuple_impl::_Tuple_impl): Define overloads taking
 898         __tuple_like_tag_t and a tuple-like type for C++23.
 899         (_Tuple_impl::_M_assign): Likewise.
 900         (tuple::__constructible_from_tuple_like): Define for C++23.
 901         (tuple::__convertible_from_tuple_like): Define for C++23.
 902         (tuple::__dangles_from_tuple_like): Define for C++23.
 903         (tuple::tuple): Define overloads taking a tuple-like type for
 904         C++23 as per P2165R4.
 905         (tuple::__assignable_from_tuple_like): Define for C++23.
 906         (tuple::__const_assignable_from_tuple_like): Define for C++23.
 907         (tuple::operator=): Define overloads taking a tuple-like type
 908         for C++23 as per P2165R4.
 909         (tuple::__tuple_like_common_comparison_category): Define for C++23.
 910         (tuple::operator<=>): Define overload taking a tuple-like type
 911         for C++23 as per P2165R4.
 912         (array, get): Forward declarations moved to <bits/stl_pair.h>.
 913         (tuple_cat): Constrain with __tuple_like for C++23 as per P2165R4.
 914         (apply): Likewise.
 915         (make_from_tuple): Likewise.
 916         (__tuple_like_common_reference): Define for C++23.
 917         (basic_common_reference): Adjust as per P2165R4.
 918         (__tuple_like_common_type): Define for C++23.
 919         (common_type): Adjust as per P2165R4.
 920         * include/std/unordered_map (__cpp_lib_tuple_like): Define for
 921         C++23.
 922         * include/std/utility (__cpp_lib_tuple_like): Define for C++23.
 923         * testsuite/std/ranges/zip/1.cc (test01): Adjust to handle pair
 924         and 2-tuple interchangeably.
 925         (test05): New test.
 926         * testsuite/20_util/pair/p2165r4.cc: New test.
 927         * testsuite/20_util/tuple/p2165r4.cc: New test.
 928
 929 2024-02-01  Patrick Palka  <ppalka@redhat.com>
 930
 931         * include/bits/stl_pair.h (pair::_S_const_assignable): Define,
 932         factored out from ...
 933         (pair::operator=): ... the constraints of the const overloads.
 934
 935 2024-02-01  Jonathan Wakely  <jwakely@redhat.com>
 936
 937         * include/bits/version.tpl: Do not use def-file-line for each
 938         macro being defined.
 939         * include/bits/version.h: Regenerate.
 940
 941 2024-02-01  Jonathan Wakely  <jwakely@redhat.com>
 942
 943         * testsuite/25_algorithms/copy/debug/constexpr_neg.cc: Adjust
 944         dg-error pattern.
 945         * testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc:
 946         Likewise.
 947         * testsuite/25_algorithms/equal/debug/constexpr_neg.cc:
 948         Likewise.
 949         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc:
 950         Likewise.
 951         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc:
 952         Likewise.
 953         * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc:
 954         Likewise.
 955         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc:
 956         Likewise.
 957         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc:
 958         Likewise.
 959         * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc:
 960         Likewise.
 961
 962 2024-02-01  Jonathan Wakely  <jwakely@redhat.com>
 963
 964         * include/experimental/internet (network_v4::to_string()):
 965         Remove lambda and use of resize_and_overwrite.
 966
 967 2024-01-31  Jonathan Wakely  <jwakely@redhat.com>
 968
 969         * acinclude.m4 (GLIBCXX_CHECK_TEXT_ENCODING): Use <xlocale.h> if
 970         needed for newlocale.
 971         * configure: Regenerate.
 972         * src/c++26/text_encoding.cc: Use <xlocale.h>.
 973
 974 2024-01-31  Jonathan Wakely  <jwakely@redhat.com>
 975             Ewan Higgs  <ewan.higgs@gmail.com>
 976
 977         * include/bits/text_encoding-data.h: Regenerate.
 978         * scripts/gen_text_encoding_data.py: Add extra_aliases dict
 979         containing "ASCII".
 980         * testsuite/std/text_encoding/cons.cc: Check "ascii" is known.
 981
 982 2024-01-31  Jonathan Wakely  <jwakely@redhat.com>
 983
 984         * doc/xml/manual/using.xml: Update tables of supported headers.
 985         * doc/html/*: Regenerate.
 986
 987 2024-01-31  Jonathan Wakely  <jwakely@redhat.com>
 988
 989         * include/std/bitset (_Base_bitset::_M_do_to_ullong): Avoid
 990         -Wshift-count-overflow warning.
 991
 992 2024-01-30  Jonathan Wakely  <jwakely@redhat.com>
 993
 994         * testsuite/std/time/clock/gps/io.cc: Fix expected result in
 995         assertion and call test_format() from main.
 996
 997 2024-01-29  François Dumont  <fdumont@gcc.gnu.org>
 998
 999         * doc/xml/manual/debug_mode.xml: Link against libstdc++exp.a to use
1000         _GLIBCXX_DEBUG_BACKTRACE macro.
1001
1002 2024-01-24  Huanghui Nie  <nnnjkk@gmail.com>
1003             Théo Papadopoulo   <papadopoulo@gmail.com>
1004
1005         * include/bits/hashtable.h (_Hahstable<>::_M_remove_bucket_begin): Remove
1006         _M_before_begin check and cleanup implementation.
1007
1008 2024-01-22  Jonathan Wakely  <jwakely@redhat.com>
1009
1010         * testsuite/std/time/clock/file/io.cc: Fix expected result in
1011         assertion and call test_format() from main.
1012
1013 2024-01-21  Jonathan Wakely  <jwakely@redhat.com>
1014
1015         PR libstdc++/113500
1016         * include/bits/chrono_io.h (__formatter_chrono::_M_S): Fix
1017         printing of subseconds with floating-point rep.
1018         (__formatter_chrono::_M_format_to_ostream): Do not write
1019         time_point specializations directly to the ostream.
1020         (formatter<chrono::sys_time<D>, C>::parse): Do not allow an
1021         empty chrono-spec if the type fails to meet the constraints for
1022         writing to an ostream with operator<<.
1023         * testsuite/std/time/clock/file/io.cc: Check formatting
1024         non-integral times with empty chrono-specs.
1025         * testsuite/std/time/clock/gps/io.cc: Likewise.
1026         * testsuite/std/time/clock/utc/io.cc: Likewise.
1027         * testsuite/std/time/hh_mm_ss/io.cc: Likewise.
1028
1029 2024-01-21  Jonathan Wakely  <jwakely@redhat.com>
1030
1031         * include/bits/chrono.h (__file_clock::from_sys)
1032         (__file_clock::to_sys, __file_clock::_S_from_sys)
1033         (__file_clock::_S_to_sys): Use common_type for return type.
1034         * testsuite/std/time/clock/file/members.cc: Check round trip
1035         conversion for time with lower precision that seconds.
1036
1037 2024-01-21  Jonathan Wakely  <jwakely@redhat.com>
1038
1039         PR libstdc++/113512
1040         * include/std/format (__formatter_fp::format): Fix logic for
1041         alternate forms.
1042         * testsuite/std/format/functions/format.cc: Check buggy cases of
1043         alternate forms with g presentation type.
1044
1045 2024-01-20  Marek Polacek  <polacek@redhat.com>
1046
1047         PR c++/111410
1048         * include/std/ranges: Add #pragma to disable -Wdangling-reference with
1049         std::ranges::views::__adaptor::operator|.
1050
1051 2024-01-19  Jonathan Wakely  <jwakely@redhat.com>
1052
1053         * include/std/format (_Spec::_M_parse_fill_and_align): Do not
1054         use CTAD for _Utf32_view.
1055
1056 2024-01-19  Jonathan Wakely  <jwakely@redhat.com>
1057
1058         PR libstdc++/108822
1059         * include/std/tuple (__glibcxx_no_dangling_refs) [C++17]: Fix
1060         wrong fold-operator.
1061         * testsuite/20_util/tuple/dangling_ref.cc: Check tuples with one
1062         element and three elements. Check allocator-extended
1063         constructors.
1064
1065 2024-01-19  Patrick Palka  <ppalka@redhat.com>
1066
1067         * include/precompiled/stdc++.h [_GLIBCXX_HOSTED]: Include
1068         <print> and <text_encoding> for C++23 and C++26 respectively.
1069
1070 2024-01-18  Patrick Palka  <ppalka@redhat.com>
1071
1072         * include/bits/stl_pair.h [__cplusplus > 202002L]:
1073         Guard P2321R2 changes with __glibcxx_ranges_zip instead.
1074
1075 2024-01-18  Patrick Palka  <ppalka@redhat.com>
1076
1077         * include/std/tuple [__cplusplus > 202002L]: Guard P2321R2
1078         changes with __cpp_lib_ranges_zip instead.
1079
1080 2024-01-18  Patrick Palka  <ppalka@redhat.com>
1081
1082         PR libstdc++/109536
1083         * include/debug/safe_base.h (_Safe_sequence_base::_M_swap):
1084         Remove _GLIBCXX20_CONSTEXPR from non-inline member function.
1085         * include/debug/safe_iterator.h
1086         (_GLIBCXX20_CONSTEXPR_NON_LITERAL_SCOPE_BEGIN): Define.
1087         (_GLIBCXX20_CONSTEXPR_NON_LITERAL_SCOPE_END): Define.
1088         (_Safe_iterator::operator=): Use them around the code path that
1089         defines a variable of type __gnu_cxx::__scoped_lock.
1090         (_Safe_iterator::operator++): Likewise.
1091         (_Safe_iterator::operator--): Likewise.
1092         (_Safe_iterator::operator+=): Likewise.
1093         (_Safe_iterator::operator-=): Likewise.
1094         * testsuite/23_containers/vector/element_access/constexpr.cc
1095         (test_iterators): Test more iterator operations.
1096         * testsuite/23_containers/vector/bool/element_access/constexpr.cc
1097         (test_iterators): Likewise.
1098         * testsuite/std/ranges/adaptors/all.cc (test08) [_GLIBCXX_DEBUG]:
1099         Remove.
1100
1101 2024-01-18  Jonathan Wakely  <jwakely@redhat.com>
1102
1103         * include/bits/unicode.h (__charset_alias_match): Initialize
1104         __var_a and __var_b.
1105
1106 2024-01-18  Jonathan Wakely  <jwakely@redhat.com>
1107
1108         PR libstdc++/113450
1109         * testsuite/std/format/functions/format.cc: Use signed char
1110         instead of int8_t.
1111
1112 2024-01-17  Jonathan Wakely  <jwakely@redhat.com>
1113
1114         PR libstdc++/113318
1115         * acinclude.m4 (GLIBCXX_CONFIGURE): Add c++26 directory.
1116         (GLIBCXX_CHECK_TEXT_ENCODING): Define.
1117         * config.h.in: Regenerate.
1118         * configure: Regenerate.
1119         * configure.ac: Use GLIBCXX_CHECK_TEXT_ENCODING.
1120         * include/Makefile.am: Add new headers.
1121         * include/Makefile.in: Regenerate.
1122         * include/bits/locale_classes.h (locale::encoding): Declare new
1123         member function.
1124         * include/bits/unicode.h (__charset_alias_match): New function.
1125         * include/bits/text_encoding-data.h: New file.
1126         * include/bits/version.def (text_encoding): Define.
1127         * include/bits/version.h: Regenerate.
1128         * include/std/text_encoding: New file.
1129         * src/Makefile.am: Add new subdirectory.
1130         * src/Makefile.in: Regenerate.
1131         * src/c++26/Makefile.am: New file.
1132         * src/c++26/Makefile.in: New file.
1133         * src/c++26/text_encoding.cc: New file.
1134         * src/experimental/Makefile.am: Include c++26 convenience
1135         library.
1136         * src/experimental/Makefile.in: Regenerate.
1137         * python/libstdcxx/v6/printers.py (StdTextEncodingPrinter): New
1138         printer.
1139         * scripts/gen_text_encoding_data.py: New file.
1140         * testsuite/22_locale/locale/encoding.cc: New test.
1141         * testsuite/ext/unicode/charset_alias_match.cc: New test.
1142         * testsuite/std/text_encoding/cons.cc: New test.
1143         * testsuite/std/text_encoding/members.cc: New test.
1144         * testsuite/std/text_encoding/requirements.cc: New test.
1145
1146 2024-01-17  Jonathan Wakely  <jwakely@redhat.com>
1147
1148         * include/bits/unicode.h (_Grapheme_cluster_view): Require view.
1149         Do not use CTAD for _Utf32_view.
1150         (__format_width, __truncate): Do not use CTAD.
1151         (enable_borrowed_range<_Utf_view<T, R>>): Define specialization.
1152         (enable_borrowed_range<_Grapheme_cluster_view<R>>): Likewise.
1153
1154 2024-01-17  Patrick Palka  <ppalka@redhat.com>
1155
1156         * include/std/ranges (views::_CartesianProduct::operator()):
1157         Adjust identity case as per P2540R1.
1158         * testsuite/std/ranges/cartesian_product/1.cc (test01):
1159         Adjust expected result of the identity case.
1160
1161 2024-01-15  Patrick Palka  <ppalka@redhat.com>
1162
1163         * include/std/variant (__detail::__variant::_Variadic_union):
1164         Add bool __trivially_destructible template parameter.
1165         (__detail::__variant::_Variadic_union::~_Variadic_union):
1166         Use __trivially_destructible in constraints instead.
1167         (__detail::__variant::_Variant_storage): Pass
1168         __trivially_destructible value to _Variadic_union.
1169
1170 2024-01-15  Patrick Palka  <ppalka@redhat.com>
1171
1172         * include/bits/stl_iterator.h (const_iterator): Define conversion
1173         operators as per P2836R1.
1174         * include/bits/version.def (ranges_as_const): Update value.
1175         * include/bits/version.h: Regenerate.
1176         * testsuite/24_iterators/const_iterator/1.cc (test04): New test.
1177         * testsuite/std/ranges/adaptors/as_const/1.cc: Adjust expected
1178         value of __cpp_lib_ranges_as_const.
1179         * testsuite/std/ranges/version_c++23.cc: Likewise.
1180
1181 2024-01-15  Jonathan Wakely  <jwakely@redhat.com>
1182
1183         PR libstdc++/108822
1184         * include/std/tuple (__assignable, __is_nothrow_assignable):
1185         Move pre-C++20 definitions adjacent to their use.
1186
1187 2024-01-15  Jonathan Wakely  <jwakely@redhat.com>
1188
1189         PR testsuite/113366
1190         * include/std/format (basic_format_arg): Use __formattable
1191         variable template instead of __format::__formattable_with
1192         concept.
1193
1194 2024-01-15  Jonathan Wakely  <jwakely@redhat.com>
1195
1196         * src/c++20/tzdata.zi: Import new file from 2023d release.
1197         * src/c++20/tzdb.cc (tzdb_list::_Node::_S_read_leap_seconds)
1198         Update expiry date for leap seconds list.
1199
1200 2024-01-13  Jonathan Wakely  <jwakely@redhat.com>
1201
1202         PR libstdc++/108822
1203         * include/std/tuple (tuple): Add checks for dangling references.
1204         Reimplement constraints and constant expressions using C++20
1205         features.
1206         * include/std/type_traits [C++20]
1207         (__is_implicitly_default_constructible_v): Define.
1208         (__is_implicitly_default_constructible): Use variable template.
1209         * testsuite/20_util/tuple/dangling_ref.cc: New test.
1210
1211 2024-01-13  Patrick Palka  <ppalka@redhat.com>
1212
1213         PR libstdc++/108827
1214         PR libstdc++/111327
1215         * include/bits/version.def (bind_back): Define.
1216         * include/bits/version.h: Regenerate.
1217         * include/std/functional (_Bind_back): Define for C++23.
1218         (bind_back): Likewise.
1219         * testsuite/20_util/function_objects/bind_back/1.cc: New test
1220         (adapted from corresponding bind_front test).
1221         * testsuite/20_util/function_objects/bind_back/111327.cc: Likewise.
1222
1223 2024-01-13  Patrick Palka  <ppalka@redhat.com>
1224
1225         * include/std/functional (_Bind_front): Remove =default special
1226         member function declarations.
1227         (_Bind_front::operator()): Implement using C++23 deducing this
1228         when available.
1229         * testsuite/20_util/function_objects/bind_front/111327.cc:
1230         Adjust testcase to expect better errors in C++23 mode.
1231
1232 2024-01-13  Patrick Palka  <ppalka@redhat.com>
1233
1234         * include/std/ranges (views::__adaptor::operator|): Perform
1235         perfect forwarding of arguments.
1236         (views::__adaptor::_RangeAdaptor::operator()): Pass dummy
1237         first argument to _Partial.
1238         (views::__adaptor::_Partial::_Partial): Likewise.  Add dummy
1239         first parameter.
1240         (views::__adaptor::_Pipe::_Pipe): Perform perfect forwarding
1241         of arguments.
1242         (to): Pass dummy first argument to _Partial.
1243
1244 2024-01-13  Jonathan Wakely  <jwakely@redhat.com>
1245
1246         PR libstdc++/107466
1247         * include/bits/random.tcc (subtract_with_carry_engine::seed):
1248         Implement proposed resolution of LWG 4014.
1249         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
1250         line number.
1251         * testsuite/26_numerics/random/subtract_with_carry_engine/cons/lwg3809.cc:
1252         Check for expected result of 64-bit engine with seed that
1253         doesn't fit in 32-bits.
1254
1255 2024-01-12  Jonathan Wakely  <jwakely@redhat.com>
1256
1257         PR libstdc++/113320
1258         * include/std/format (__format::_Runtime_format_string): Add
1259         constructor and disable copy operations.
1260         (basic_format_string(_Runtime_format_string)): Add noexcept and
1261         take parameter by value not rvalue reference.
1262         (runtime_format): Add noexcept.
1263         * testsuite/std/format/runtime_format.cc: Check noexcept. Check
1264         that construction is only possible from prvalues, not xvalues.
1265
1266 2024-01-12  Jonathan Wakely  <jwakely@redhat.com>
1267
1268         PR libstdc++/105505
1269         * include/bits/stl_pair.h (pair::pair(U1&&, U2&&)) [C++23]: Add
1270         default template arguments, as per P1951R1.
1271         * testsuite/20_util/pair/cons/default_tmpl_args.cc: New test.
1272
1273 2024-01-12  Jonathan Wakely  <jwakely@redhat.com>
1274
1275         * include/std/format (__format::_Arg_store): Fix PR number in
1276         comment. Simplify preprocessor code.
1277
1278 2024-01-11  Jonathan Wakely  <jwakely@redhat.com>
1279
1280         * doc/xml/manual/evolution.xml: Fix spelling.
1281         * doc/html/manual/api.html: Regenerate.
1282
1283 2024-01-11  Jonathan Wakely  <jwakely@redhat.com>
1284
1285         * doc/xml/manual/evolution.xml: Document addition of
1286         libstdc++exp.a.
1287         * doc/html/*: Regenerate.
1288
1289 2024-01-11  Marcus Haehnel  <marcus.haehnel@kernkonzept.com>
1290
1291         * libsupc++/eh_unex_handler.cc: Adjust definition type to
1292         declaration.
1293
1294 2024-01-11  Michael Levine  <mlevine55@bloomberg.net>
1295
1296         * include/std/ranges (__glibcxx_want_ranges_iota): Remove
1297         duplicate definition.
1298
1299 2024-01-11  François Dumont  <fdumont@gcc.gnu.org>
1300
1301         PR libstdc++/112477
1302         * src/c++11/debug.cc
1303         (_Safe_iterator_base::_M_attach): Reset _M_version to 0 if attaching to null
1304         sequence.
1305         (_Safe_iterator_base::_M_attach_single): Likewise.
1306         (_Safe_local_iterator_base::_M_attach): Likewise.
1307         (_Safe_local_iterator_base::_M_attach_single): Likewise.
1308         * testsuite/23_containers/map/debug/112477.cc: New test case.
1309
1310 2024-01-11  Patrick Palka  <ppalka@redhat.com>
1311
1312         * include/bits/move.h (__like_t): Define in C++23 mode.
1313         * include/std/ranges (views::__adaptor::Partial::operator()):
1314         Implement using C++23 deducing this when available.
1315         (views::__adaptor::_Pipe::operator()): Likewise.
1316         * testsuite/std/ranges/adaptors/100577.cc: Adjust testcase to
1317         accept new "no match for call" errors issued in C++23 mode.
1318         * testsuite/std/ranges/adaptors/lazy_split_neg.cc: Likewise.
1319
1320 2024-01-11  Jonathan Wakely  <jwakely@redhat.com>
1321
1322         * python/libstdcxx/v6/printers.py (StdIntegralConstantPrinter):
1323         Add printer for std::integral_constant.
1324         * testsuite/libstdc++-prettyprinters/cxx11.cc: Test it.
1325
1326 2024-01-11  Jonathan Wakely  <jwakely@redhat.com>
1327
1328         PR libstdc++/113258
1329         * libsupc++/new_opa.cc: Prefer to use posix_memalign if
1330         available.
1331
1332 2024-01-11  Ken Matsui  <kmatsui@gcc.gnu.org>
1333
1334         * src/filesystem/ops-common.h (stat_type): Use using.
1335
1336 2024-01-11  Ken Matsui  <kmatsui@gcc.gnu.org>
1337
1338         PR libstdc++/113250
1339         * src/c++17/fs_ops.cc (fs::equivalent): Use || instead of &&.
1340         * src/filesystem/ops.cc (fs::equivalent): Likewise.
1341         * testsuite/27_io/filesystem/operations/equivalent.cc: Handle
1342         error codes.
1343         * testsuite/experimental/filesystem/operations/equivalent.cc:
1344         Likewise.
1345
1346 2024-01-11  Ken Matsui  <kmatsui@gcc.gnu.org>
1347
1348         * include/std/type_traits (is_compound): Do not use __not_.
1349         (is_compound_v): Use is_fundamental_v instead.
1350
1351 2024-01-11  Patrick Palka  <ppalka@redhat.com>
1352
1353         * include/bits/utility.h (_Nth_type): Use
1354         _GLIBCXX_USE_BUILTIN_TRAIT instead of __has_builtin.
1355
1356 2024-01-09  Jonathan Wakely  <jwakely@redhat.com>
1357
1358         * include/bits/unicode-data.h: Regenerate.
1359         * include/bits/unicode.h (_Utf_iterator::operator++()): Fix off
1360         by one error.
1361         (__incb_property): Add missing check for values before the
1362         first edge.
1363         (__is_extended_pictographic): Invert return values to fix
1364         copy&pasted logic.
1365         (_Grapheme_cluster_view::_Iterator): Remove second iterator
1366         member and find end of cluster lazily.
1367         * testsuite/ext/unicode/grapheme_view.cc: New test.
1368         * testsuite/ext/unicode/properties.cc: New test.
1369         * testsuite/ext/unicode/view.cc: New test.
1370
1371 2024-01-09  Andreas Schwab  <schwab@linux-m68k.org>
1372
1373         * scripts/extract_symvers.in: Require final colon to only match
1374         .dsynsym in the header of the dynamic symtab.
1375
1376 2024-01-09  Jonathan Wakely  <jwakely@redhat.com>
1377
1378         * include/bits/chrono_io.h (__formatter_chrono::_M_F): Simplify
1379         handling of string returned from std::format.
1380         (__formatter_chrono::_M_R_T): Likewise.
1381
1382 2024-01-08  Jonathan Wakely  <jwakely@redhat.com>
1383
1384         * include/bits/unicode.h (__null_sentinel): Remove.
1385         * testsuite/17_intro/names.cc: Add __null_sentinel.
1386
1387 2024-01-08  Jonathan Wakely  <jwakely@redhat.com>
1388
1389         * include/std/format (__format::_Runtime_format_string): Define
1390         new class template.
1391         (basic_format_string): Add non-consteval constructor for runtime
1392         format strings.
1393         (runtime_format): Define new function for C++26.
1394         * testsuite/std/format/runtime_format.cc: New test.
1395
1396 2024-01-08  Jonathan Wakely  <jwakely@redhat.com>
1397
1398         * include/bits/chrono_io.h (__formatter_chrono): Always use
1399         lvalue arguments to make_format_args.
1400         * include/std/format (make_format_args): Change parameter pack
1401         from forwarding references to lvalue references. Remove use of
1402         remove_reference_t which is now unnecessary.
1403         (format_to, formatted_size): Remove incorrect forwarding of
1404         arguments.
1405         * include/std/ostream (print): Remove forwarding of arguments.
1406         * include/std/print (print): Likewise.
1407         * testsuite/20_util/duration/io.cc: Use lvalues as arguments to
1408         make_format_args.
1409         * testsuite/std/format/arguments/args.cc: Likewise.
1410         * testsuite/std/format/arguments/lwg3810.cc: Likewise.
1411         * testsuite/std/format/functions/format.cc: Likewise.
1412         * testsuite/std/format/functions/vformat_to.cc: Likewise.
1413         * testsuite/std/format/string.cc: Likewise.
1414         * testsuite/std/time/day/io.cc: Likewise.
1415         * testsuite/std/time/month/io.cc: Likewise.
1416         * testsuite/std/time/weekday/io.cc: Likewise.
1417         * testsuite/std/time/year/io.cc: Likewise.
1418         * testsuite/std/time/year_month_day/io.cc: Likewise.
1419         * testsuite/std/format/arguments/args_neg.cc: New test.
1420
1421 2024-01-08  Jonathan Wakely  <jwakely@redhat.com>
1422
1423         * include/Makefile.am: Add new headers.
1424         * include/Makefile.in: Regenerate.
1425         * include/bits/unicode.h: New file.
1426         * include/bits/unicode-data.h: New file.
1427         * include/std/format: Include <bits/unicode.h>.
1428         (__literal_encoding_is_utf8): Move to <bits/unicode.h>.
1429         (_Spec::_M_fill): Change type to char32_t.
1430         (_Spec::_M_parse_fill_and_align): Read a Unicode scalar value
1431         instead of a single character.
1432         (__write_padded): Change __fill_char parameter to char32_t and
1433         encode it into the output.
1434         (__formatter_str::format): Use new __unicode::__field_width and
1435         __unicode::__truncate functions.
1436         * include/std/ostream: Adjust namespace qualification for
1437         __literal_encoding_is_utf8.
1438         * include/std/print: Likewise.
1439         * src/c++23/print.cc: Add [[unlikely]] attribute to error path.
1440         * testsuite/ext/unicode/view.cc: New test.
1441         * testsuite/std/format/functions/format.cc: Add missing examples
1442         from the standard demonstrating alignment with non-ASCII
1443         characters. Add examples checking correct handling of extended
1444         grapheme clusters.
1445
1446 2024-01-08  Jonathan Wakely  <jwakely@redhat.com>
1447
1448         * include/bits/version.def (format_uchar): Define.
1449         * include/bits/version.h: Regenerate.
1450         * include/std/format (formatter<C, C>::format): Check for
1451         _Pres_c and call _M_format_character directly. Cast C to its
1452         unsigned equivalent for formatting as an integer.
1453         (formatter<char, wchar_t>::format): Likewise.
1454         (basic_format_arg(T&)): Store char arguments as unsigned char
1455         for formatting to a wide string.
1456         * testsuite/std/format/functions/format.cc: Adjust test. Check
1457         formatting of
1458
1459 2024-01-07  Jonathan Wakely  <jwakely@redhat.com>
1460
1461         PR libstdc++/112997
1462         * libsupc++/unwind-cxx.h (__cxa_call_terminate): Change first
1463         parameter to void*.
1464
1465 2024-01-07  Jonathan Wakely  <jwakely@redhat.com>
1466
1467         * testsuite/20_util/variant/87619.cc: Remove dg-timeout-factor.
1468
1469 2024-01-07  Jonathan Wakely  <jwakely@redhat.com>
1470
1471         * include/std/type_traits (is_trivially_destructible_v): Use
1472         built-in directly when concepts are supported.
1473         * testsuite/20_util/is_trivially_destructible/value_v.cc: New
1474         test.
1475
1476 2024-01-06  Gwenole Beauchesne  <gb.devel@gmail.com>
1477
1478         * testsuite/tr1/8_c_compatibility/cinttypes/functions.cc: Use
1479         nonnull arguments to strtoimax() and wcstoimax() functions.
1480
1481 2024-01-05  Jonathan Wakely  <jwakely@redhat.com>
1482
1483         * src/c++17/fs_path.cc (path::_List::reserve): Limit maximum
1484         size and check for overflows in arithmetic.
1485         (path::operator/=(const path&)): Remove redundant exponential
1486         growth calculation.
1487
1488 2024-01-05  Martin Küttler  <martin.kuettler@kernkonzept.com>
1489
1490         * src/c++17/fs_path.cc (path::_List::reserve): Avoid
1491         floating-point arithmetic.
1492
1493 2024-01-05  Jonathan Wakely  <jwakely@redhat.com>
1494
1495         PR libstdc++/113241
1496         * include/std/type_traits (is_convertible_v): Guard use of
1497         built-in with preprocessor check.
1498
1499 2024-01-05  Jonathan Wakely  <jwakely@redhat.com>
1500
1501         PR libstdc++/113200
1502         * include/bits/char_traits.h (__gnu_cxx::char_traits::move): Use
1503         __builtin_constant_p to check for unrelated pointers that cannot
1504         be compared during constant evaluation.
1505         * testsuite/21_strings/char_traits/requirements/113200.cc: New
1506         test.
1507
1508 2024-01-05  Cassio Neri  <cassio.neri@gmail.com>
1509
1510         * include/std/chrono: Fix + and - for months and weekdays.
1511         * testsuite/std/time/month/1.cc: Add constexpr tests against overflow.
1512         * testsuite/std/time/month/2.cc: New test for extreme values.
1513         * testsuite/std/time/weekday/1.cc: Add constexpr tests against overflow.
1514         * testsuite/std/time/weekday/2.cc: New test for extreme values.
1515
1516 2024-01-05  Jonathan Wakely  <jwakely@redhat.com>
1517
1518         PR libstdc++/113099
1519         * include/bits/locale_classes.tcc (__try_use_facet): Use
1520         if-constexpr for C++11 and up.
1521
1522 2024-01-05  Ken Matsui  <kmatsui@gcc.gnu.org>
1523
1524         * include/std/type_traits: Use _GLIBCXX_USE_BUILTIN_TRAIT.
1525
1526 2024-01-04  Arsen Arsenović  <arsen@aarsen.me>
1527
1528         * include/std/generator (_Subyield_state::_M_jump_in): Fix typo
1529         reported by Will Hawkins <hawkinsw@obs.cr>.
1530
1531 2024-01-04  Arsen Arsenović  <arsen@aarsen.me>
1532
1533         * include/std/generator (_Stateless_alloc): Rename typename _A
1534         to _All.
1535
1536 2024-01-03  Patrick Palka  <ppalka@redhat.com>
1537
1538         PR testsuite/113175
1539         * testsuite/std/ranges/iota/max_size_type.cc (test02): Reduce
1540         'limit' to 100 from 1000 and adjust 'log2_limit' accordingly.
1541         (test03): Likewise.
1542
1543 \f
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