libstdc++-v3/ChangeLog

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