libstdc++-v3/ChangeLog

   1 2019-10-09  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         PR libstdc++/91057
   4         * src/c++98/locale.cc (locale::id::_M_id()) [__GTHREADS]: Use atomic
   5         compare-exchange or double-checked lock to ensure only one thread sets
   6         the _M_index variable.
   7         [_GLIBCXX_LONG_DOUBLE_COMPAT]: Call find_ldbl_sync_facet to detect
   8         facets that share another facet's ID.
   9         [_GLIBCXX_LONG_DOUBLE_COMPAT] (find_ldbl_sync_facet): New function.
  10
  11         PR libstdc++/78552
  12         * src/c++98/locale_init.cc (locale::classic()): Do not construct a new
  13         locale object for every call.
  14         (locale::_S_initialize_once()): Construct C locale here.
  15
  16 2019-10-08  Jonathan Wakely  <jwakely@redhat.com>
  17
  18         * doc/Makefile.am (doc-html-docbook-regenerate): New target.
  19         (${docbook_outdir}/html): Do not create unused 'html/ext' directory.
  20         * doc/Makefile.in: Regenerate.
  21         * doc/xml/manual/documentation_hacking.xml: Document new target.
  22         * doc/html/*: Regenerate.
  23
  24         * doc/xml/manual/allocator.xml: Use archived copy of CUJ article.
  25         * doc/html/*: Regenerate.
  26
  27 2019-10-06  François Dumont  <fdumont@gcc.gnu.org>
  28
  29         * include/bits/stl_algo.h
  30         (__copy_n_a(_IIte, _Size, _OIte)): New.
  31         (__copy_n_a(istreambuf_iterator<>, _Size, _CharT*)): New declaration.
  32         (__copy_n(_IIte, _Size, _OIte, input_iterator_tag)): Adapt to use
  33         latter.
  34         * include/bits/streambuf_iterator.h (istreambuf_iterator<>): Declare
  35         std::__copy_n_a friend.
  36         (__copy_n_a(istreambuf_iterator<>, _Size, _CharT*)): New.
  37         * testsuite/25_algorithms/copy_n/istreambuf_iterator/1.cc: New.
  38         * testsuite/25_algorithms/copy_n/istreambuf_iterator/1_neg.cc: New.
  39         * testsuite/25_algorithms/copy_n/istreambuf_iterator/2_neg.cc: New.
  40
  41         * include/bits/stl_iterator_base_types.h (__iterator_category_t): Define
  42         for C++11.
  43         (_RequireInputIte): Likewise and use __enable_if_t.
  44         * include/std/numeric
  45         (__is_random_access_iter): Use __iterator_category_t.
  46
  47         * include/bits/stl_algo.h (copy_n): Add __glibcxx_requires_can_increment
  48         debug checks.
  49         * testsuite/25_algorithms/copy_n/debug/1_neg.cc: New.
  50         * testsuite/25_algorithms/copy_n/debug/2_neg.cc: New.
  51
  52 2019-10-04  François Dumont  <fdumont@gcc.gnu.org>
  53
  54         * include/debug/forward_list
  55         (_Sequence_traits<__debug::forward_list<>>::_S_size): Returns __dp_sign
  56         distance when not empty.
  57         * include/debug/list (_Sequence_traits<__debug::list<>>::_S_size):
  58         Likewise.
  59         * include/debug/helper_functions.h (__dp_sign_max_size): New
  60         _Distance_precision enum entry.
  61         (__valid_range_aux(_IIte, _IIte, _Distance_traits<>::__type,
  62         __false_type)): Adapt.
  63         * include/debug/safe_iterator.tcc
  64         (_Safe_iterator<>::_M_get_distance_to(const _Safe_iterator&)): Review
  65         distance computation.
  66
  67 2019-10-04  Jonathan Wakely  <jwakely@redhat.com>
  68
  69         PR libstdc++/81091
  70         PR libstdc++/91947
  71         * configure.ac: Use AC_SYS_LARGEFILE to enable 64-bit file APIs.
  72         * config.h.in: Regenerate:
  73         * configure: Regenerate:
  74         * include/Makefile.am (${host_builddir}/largefile-config.h): New
  75         target to generate config header for filesystem library.
  76         (${host_builddir}/c++config.h): Rename macros for large file support.
  77         * include/Makefile.in: Regenerate.
  78         * src/c++17/fs_dir.cc: Include new config header.
  79         * src/c++17/fs_ops.cc: Likewise.
  80         (filesystem::file_size): Use uintmax_t for size.
  81         * src/filesystem/dir.cc: Include new config header.
  82         * src/filesystem/ops.cc: Likewise.
  83         (experimental::filesystem::file_size): Use uintmax_t for size.
  84
  85         * testsuite/util/testsuite_abi.h: Use std::unordered_map instead of
  86         std::tr1::unordered_map.
  87         * testsuite/util/testsuite_allocator.h: Likewise.
  88
  89         * include/tr1/hashtable.h: Add header for __gnu_cxx::__alloc_traits.
  90
  91         * include/tr1/hashtable.h (tr1::_Hashtable::_M_allocate_node): Use
  92         __gnu_cxx::__alloc_traits for allocator construct function.
  93         (tr1::_Hashtable::_M_deallocate_node): Likewise for destroy function.
  94
  95         * include/precompiled/stdc++.h: Include <span> for C++20.
  96         * testsuite/17_intro/names.cc: Do not define 'e' for C++20.
  97
  98 2019-10-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
  99
 100         * include/parallel/multiway_merge.h (_RAIter3): Replace _C by _Cp.
 101
 102 2019-10-02  Jonathan Wakely  <jwakely@redhat.com>
 103
 104         * config/abi/pre/gnu.ver: Tighten up greedy wildcards.
 105
 106         * doc/xml/manual/parallel_mode.xml: Add caveat about support for
 107         recent standards.
 108         * doc/html/*: Regenerate.
 109
 110 2019-10-01  Jonathan Wakely  <jwakely@redhat.com>
 111
 112         * include/experimental/algorithm (experimental::sample): Qualify call
 113         to __sample correctly.
 114         * include/parallel/algo.h (sample, for_each_n): Add using-declarations
 115         for algorithms that don't have parallel implementations.
 116
 117         * include/parallel/algobase.h (equal, lexicographical_compare): Add
 118         _GLIBCXX20_CONSTEXPR and dispatch to sequential algorithm when being
 119         constant evaluated.
 120         * include/parallel/algorithmfwd.h (equal, lexicographical_compare):
 121         Add _GLIBCXX20_CONSTEXPR.
 122
 123         * testsuite/17_intro/using_namespace_std_tr1_neg.cc: Skip test for
 124         parallel mode.
 125         * testsuite/20_util/hash/84998.cc: Likewise.
 126         * testsuite/23_containers/deque/types/pmr_typedefs_debug.cc: Likewise.
 127         * testsuite/23_containers/forward_list/pmr_typedefs_debug.cc: Likewise.
 128         * testsuite/23_containers/list/pmr_typedefs_debug.cc: Likewise.
 129         * testsuite/23_containers/map/pmr_typedefs_debug.cc: Likewise.
 130         * testsuite/23_containers/multimap/pmr_typedefs_debug.cc: Likewise.
 131         * testsuite/23_containers/multiset/pmr_typedefs_debug.cc: Likewise.
 132         * testsuite/23_containers/set/pmr_typedefs_debug.cc: Likewise.
 133         * testsuite/23_containers/unordered_map/pmr_typedefs_debug.cc:
 134         Likewise.
 135         * testsuite/23_containers/unordered_multimap/pmr_typedefs_debug.cc:
 136         Likewise.
 137         * testsuite/23_containers/unordered_multiset/pmr_typedefs_debug.cc:
 138         Likewise.
 139         * testsuite/23_containers/unordered_set/pmr_typedefs_debug.cc:
 140         Likewise.
 141         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
 142         Likewise.
 143         * testsuite/23_containers/vector/types/pmr_typedefs_debug.cc: Likewise.
 144         * testsuite/25_algorithms/binary_search/partitioned.cc: Likewise.
 145         * testsuite/25_algorithms/copy/86658.cc: Likewise.
 146         * testsuite/25_algorithms/equal_range/partitioned.cc: Likewise.
 147         * testsuite/25_algorithms/lexicographical_compare/71545.cc: Likewise.
 148         * testsuite/25_algorithms/lower_bound/partitioned.cc: Likewise.
 149         * testsuite/25_algorithms/upper_bound/partitioned.cc: Likewise.
 150
 151         * include/parallel/algo.h: Replace non-reserved names.
 152         * include/parallel/multiway_merge.h: Likewise.
 153         * include/parallel/multiway_mergesort.h: Likewise.
 154         * include/parallel/numericfwd.h: Likewise.
 155         * testsuite/17_intro/names.cc: Add RAI to test macros.
 156
 157 2019-09-30  François Dumont  <fdumont@gcc.gnu.org>
 158
 159         * include/debug/array: Add C++20 constexpr to comparison operators.
 160         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc: Adapt
 161         dg-error line numbers.
 162         * testsuite/23_containers/array/tuple_interface/
 163         tuple_element_debug_neg.cc: Likewise.
 164
 165 2019-09-30  Andreas Tobler  <andreast@gcc.gnu.org>
 166
 167         * include/experimental/internet: Include netinet/in.h if we have
 168         _GLIBCXX_HAVE_NETINET_IN_H defined.
 169
 170         * testsuite/ext/special_functions/airy_ai/check_nan.cc: Ignore the
 171         FreeBSD warning about lower advertised precision of tgammal.
 172         * testsuite/ext/special_functions/airy_bi/check_nan.cc: Likewise.
 173         * testsuite/special_functions/07_cyl_bessel_i/check_nan.cc: Likewise.
 174         * testsuite/special_functions/08_cyl_bessel_j/check_nan.cc: Likewise.
 175         * testsuite/special_functions/09_cyl_bessel_k/check_nan.cc: Likewise.
 176         * testsuite/special_functions/10_cyl_neumann/check_nan.cc: Likewise.
 177         * testsuite/special_functions/19_sph_bessel/check_nan.cc: Likewise.
 178         * testsuite/special_functions/21_sph_neumann/check_nan.cc: Likewise.
 179         * testsuite/tr1/5_numerical_facilities/special_functions/
 180         08_cyl_bessel_i/check_nan.cc: Likewise.
 181         * testsuite/tr1/5_numerical_facilities/special_functions/
 182         09_cyl_bessel_j/check_nan.cc: Likewise.
 183         * testuite/tr1/5_numerical_facilities/special_functions/
 184         10_cyl_bessel_k/check_nan.cc: Likewise.
 185         * testsuite/tr1/5_numerical_facilities/special_functions/
 186         11_cyl_neumann/check_nan.cc: Likewise.
 187         * testsuite/tr1/5_numerical_facilities/special_functions/
 188         21_sph_bessel/check_nan.cc: Likewise.
 189         * testsuite/tr1/5_numerical_facilities/special_functions/
 190         23_sph_neumann/check_nan.cc: Likewise.
 191
 192 2019-09-30  Jonathan Wakely  <jwakely@redhat.com>
 193
 194         * include/std/span (span(element_type(&)[N]))
 195         (span(array<value_type, N>&), span(const array<value_type, N>&)):
 196         Deduce array element type to allow safe const conversions (LWG 3255).
 197         [!_GLIBCXX_P1394] (span(Container&), span(const Container&)): Use
 198         remove_cv_t on arguments to __is_std_span and __is_std_array.
 199         * testsuite/23_containers/span/lwg3255.cc: New test.
 200
 201         PR libstdc++/77936
 202         * include/parallel/checkers.h (__is_sorted): Remove unused variable.
 203
 204 2019-09-28  François Dumont  <fdumont@gcc.gnu.org>
 205
 206         * include/bits/stl_algo.h (merge): Fix documentation.
 207         * include/debug/functions.h (__check_sorted_aux): Add C++20 constexpr.
 208         (__check_sorted): Likewise and remove nested irreflexive check.
 209         (__check_sorted_set_aux, __check_sorted_set): Add C++20 constexpr.
 210         (__check_partitioned_lower, __check_partitioned_upper): Likewise.
 211         (_Irreflexive_checker::_S_is_valid): Likewise.
 212         (__is_irreflexive, __is_irreflexive_pred): Likewise.
 213         * include/debug/helper_functions.h (__get_distance): Add constexpr.
 214         (__valid_range_aux): Add C++20 constexpr.
 215         (__valid_range(_Iter, _Iter, _Distance_traits<_Iter>::__type&)):
 216         Likewise and add std::is_constant_evaluated check.
 217         (__valid_range_aux(_Iter, _Iter, std::input_iterator_tag)): New.
 218         (__valid_range_aux(_Iter, _Iter, std::random_accss_iterator_tag)): New.
 219         (__valid_range_aux(_Integral, _Integral, std::__true_type)): New,
 220         use latter.
 221         (__valid_range(_Iter, _Iter)): Adapt to use latter, add constexpr and
 222         __builtin_is_contant_evaludated check..
 223         (__can_advance, __base): Add constexpr.
 224         * include/debug/macros.h [_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED]
 225         (_GLIBCXX_DEBUG_VERIFY_COND_AT): New.
 226         (__glibcxx_check_sorted): Use __glibcxx_check_irreflexive.
 227         (__glibcxx_check_sorted_pred): Use __glibcxx_check_irreflexive_pred.
 228         * testsuite/25_algorithms/binary_search/constexpr.cc: Use irreflexive
 229         std::less.
 230         * testsuite/25_algorithms/is_sorted/constexpr.cc: Likewise.
 231         * testsuite/25_algorithms/merge/constexpr.cc: Fix order in camm. Fix
 232         lambda to be irreflexive.
 233
 234 2019-09-27  Maciej W. Rozycki  <macro@wdc.com>
 235
 236         * configure: Regenerate.
 237
 238 2019-09-27  Jonathan Wakely  <jwakely@redhat.com>
 239
 240         PR libstdc++/91910
 241         * src/c++11/debug.cc (_Safe_iterator_base::_M_detach()): Load pointer
 242         atomically and lock the mutex before accessing the sequence.
 243         (_Safe_local_iterator_base::_M_detach()): Likewise.
 244         (_Safe_iterator_base::_M_reset()): Clear _M_sequence atomically.
 245
 246 2019-09-26  Jonathan Wakely  <jwakely@redhat.com>
 247
 248         * include/debug/array (to_array): Define for debug mode.
 249
 250         * include/bits/stl_pair.h (pair): Add _GLIBCXX20_CONSTEXPR to
 251         piecewise construction constructor, assignment operators, and swap.
 252         * include/std/tuple (pair::pair(piecewise_construct_t, tuple, tuple)):
 253         Add _GLIBCXX20_CONSTEXPR.
 254         (pair::pair(tuple, tuple, _Index_tuple, _Index_tuple)): Likewise.
 255         * testsuite/20_util/pair/constexpr_assign.cc: New test.
 256         * testsuite/20_util/pair/constexpr_swap.cc: New test.
 257
 258         * include/experimental/internet (operator==, operator<): Fix loop
 259         condition to avoid reading past the end of the array.
 260
 261         * include/std/array: Remove references to profile mode.
 262         * include/std/bitset: Likewise.
 263         * include/std/deque: Likewise.
 264         * include/std/forward_list: Likewise.
 265         * include/std/list: Likewise.
 266         * include/std/map: Likewise.
 267         * include/std/set: Likewise.
 268         * include/std/unordered_map: Likewise.
 269         * include/std/unordered_set: Likewise.
 270         * include/std/vector: Likewise.
 271         * testsuite/17_intro/headers/c++1998/profile_mode.cc: New test.
 272         * testsuite/17_intro/headers/c++2011/profile_mode.cc: New test.
 273
 274 2019-09-25  Jonathan Wakely  <jwakely@redhat.com>
 275
 276         * include/bits/regex.h
 277         (basic_regex::assign(const C*, size_t, flag_type)): Add default
 278         argument (LWG 3296).
 279         * testsuite/28_regex/basic_regex/assign/char/lwg3296.cc: New test.
 280         * testsuite/28_regex/basic_regex/assign/wchar_t/lwg3296.cc: New test.
 281
 282 2019-09-24  Jonathan Wakely  <jwakely@redhat.com>
 283
 284         * include/std/variant (variant::index()): Remove impossible case.
 285
 286         PR libstdc++/91871
 287         * testsuite/util/testsuite_hooks.h
 288         (conversion::iterator_to_const_iterator()): Do not return an invalid
 289         iterator. Test direct-initialization and direct-list-initialization
 290         as well as implicit conversion.
 291
 292 2019-09-23  Jonathan Wakely  <jwakely@redhat.com>
 293
 294         PR libstdc++/91788 (partial)
 295         * include/std/variant (variant::index()): Improve codegen for cases
 296         where conversion to size_t already works correctly.
 297
 298 2019-09-23  Andreas Schwab  <schwab@suse.de>
 299
 300         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
 301
 302 2019-09-12  Jonathan Wakely  <jwakely@redhat.com>
 303
 304         PR libstdc++/91748
 305         * include/bits/stl_algo.h (for_each_n): Fix random access iterator
 306         case.
 307         * testsuite/25_algorithms/for_each/for_each_n.cc: Test with random
 308         access iterators.
 309
 310 2019-09-11  Jonathan Wakely  <jwakely@redhat.com>
 311
 312         * python/libstdcxx/v6/xmethods.py (SharedPtrUseCountWorker.__call__):
 313         Fix syntax error.
 314
 315         * testsuite/20_util/result_of/sfinae_friendly_1.cc: Add -Wno-volatile
 316         for C++2a and up. Define HAS_52748_FIXED and fix incorrect tests.
 317         * testsuite/tr1/3_function_objects/result_of.cc: Add -Wno-volatile
 318         for C++2a and up.
 319
 320 2019-09-10  Jonathan Wakely  <jwakely@redhat.com>
 321
 322         * include/std/type_traits (__do_common_type_impl): Implement
 323         additional COND-RES(CREF(D1), CRED(D2)) condition for C++20.
 324         (basic_common_reference, common_reference, common_reference_t): Define
 325         for C++20.
 326         * testsuite/20_util/common_reference/requirements/alias_decl.cc: New
 327         test.
 328         * testsuite/20_util/common_reference/requirements/
 329         explicit_instantiation.cc: New test.
 330         * testsuite/20_util/common_reference/requirements/typedefs.cc: New
 331         test.
 332
 333         * include/std/charconv (to_chars): Rename to __to_chars_i. Define
 334         non-template overloads for each signed and unsigned integer type and
 335         char. Define deleted overload for bool (LWG 3266).
 336         * testsuite/20_util/to_chars/1_neg.cc: Remove.
 337         * testsuite/20_util/to_chars/3.cc: New test.
 338         * testsuite/20_util/to_chars/lwg3266.cc: New test.
 339
 340 2019-09-10  Christophe Lyon  <christophe.lyon@st.com>
 341
 342         * acinclude.m4: Handle uclinux*.
 343         * configure: Regenerate.
 344         * configure.host: Handle uclinux*
 345
 346 2019-09-10  Christophe Lyon  <christophe.lyon@st.com>
 347         Mickaël Guêné <mickael.guene@st.com>
 348
 349         * libsupc++/eh_personality.cc (get_ttype_entry): Add FDPIC
 350         support.
 351
 352 2019-09-10  Jonathan Wakely  <jwakely@redhat.com>
 353
 354         PR libstdc++/91711
 355         * testsuite/23_containers/span/get_neg.cc: Avoid ambiguity due to
 356         0ul being a valid null pointer constant.
 357
 358         * include/std/type_traits (__remove_cv_t): New alias template.
 359         (is_void, is_integral, is_floating_point, is_pointer)
 360         (is_member_object_pointer, is_member_function_pointer, is_null_pointer)
 361         (is_member_point), __is_signed_integer, __is_unsigned_integer)
 362         (__make_unsigned_selector, __make_signed_selector, remove_pointer)
 363         (__decay_selector): Use __remove_cv_t.
 364         (remove_cv): Add partial specializations for cv-qualified types.
 365         (__decay_t): New alias template.
 366         (__decay_and_strip, __common_type_impl, __result_of_impl): Use
 367         __decay_t.
 368         (__enable_if_t): Move earlier in the file.
 369         (_Require): Use __enable_if_t.
 370         (swap(T&, T&)): Use _Require.
 371         (swap(T(&)[N])): Use __enable_if_t.
 372
 373 2019-09-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
 374
 375         Implement C++20 p1424 - 'constexpr' feature macro concerns,
 376         Issue 3256 - Feature testing macro for constexpr algorithms,
 377         and Issue 3257 - Missing feature testing macro update from P0858.
 378         * include/std/version (__cpp_lib_constexpr_algorithms): Bump value.
 379         * include/bits/algorithmfwd.h: Ditto.
 380         * include/std/utility: Ditto.
 381         * testsuite/25_algorithms/constexpr_macro.cc: Ditto.
 382         * testsuite/25_algorithms/cpp_lib_constexpr.cc: New check for
 383         __cpp_lib_constexpr macro in <algorith>.
 384         * testsuite/20_util/exchange/constexpr.cc: Add check for
 385         __cpp_lib_constexpr macro in <utility>.
 386         * testsuite/25_algorithms/adjacent_find/constexpr.cc: Remove check for
 387         __cpp_lib_constexpr_algorithms.
 388         * testsuite/25_algorithms/all_of/constexpr.cc: Ditto.
 389         * testsuite/25_algorithms/any_of/constexpr.cc: Ditto.
 390         * testsuite/25_algorithms/binary_search/constexpr.cc: Ditto.
 391         * testsuite/25_algorithms/copy/constexpr.cc: Ditto.
 392         * testsuite/25_algorithms/copy_backward/constexpr.cc: Ditto.
 393         * testsuite/25_algorithms/copy_if/constexpr.cc: Ditto.
 394         * testsuite/25_algorithms/copy_n/constexpr.cc: Ditto.
 395         * testsuite/25_algorithms/count/constexpr.cc: Ditto.
 396         * testsuite/25_algorithms/count_if/constexpr.cc: Ditto.
 397         * testsuite/25_algorithms/equal/constexpr.cc: Ditto.
 398         * testsuite/25_algorithms/equal_range/constexpr.cc: Ditto.
 399         * testsuite/25_algorithms/fill/constexpr.cc: Ditto.
 400         * testsuite/25_algorithms/fill_n/constexpr.cc: Ditto.
 401         * testsuite/25_algorithms/find/constexpr.cc: Ditto.
 402         * testsuite/25_algorithms/find_end/constexpr.cc: Ditto.
 403         * testsuite/25_algorithms/find_first_of/constexpr.cc: Ditto.
 404         * testsuite/25_algorithms/find_if/constexpr.cc: Ditto.
 405         * testsuite/25_algorithms/find_if_not/constexpr.cc: Ditto.
 406         * testsuite/25_algorithms/for_each/constexpr.cc: Ditto.
 407         * testsuite/25_algorithms/generate/constexpr.cc: Ditto.
 408         * testsuite/25_algorithms/generate_n/constexpr.cc: Ditto.
 409         * testsuite/25_algorithms/is_heap/constexpr.cc: Ditto.
 410         * testsuite/25_algorithms/is_heap_until/constexpr.cc: Ditto.
 411         * testsuite/25_algorithms/is_partitioned/constexpr.cc: Ditto.
 412         * testsuite/25_algorithms/is_permutation/constexpr.cc: Ditto.
 413         * testsuite/25_algorithms/is_sorted/constexpr.cc: Ditto.
 414         * testsuite/25_algorithms/is_sorted_until/constexpr.cc: Ditto.
 415         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc: Ditto.
 416         * testsuite/25_algorithms/lower_bound/constexpr.cc: Ditto.
 417         * testsuite/25_algorithms/merge/constexpr.cc: Ditto.
 418         * testsuite/25_algorithms/mismatch/constexpr.cc: Ditto.
 419         * testsuite/25_algorithms/none_of/constexpr.cc: Ditto.
 420         * testsuite/25_algorithms/partition_copy/constexpr.cc: Ditto.
 421         * testsuite/25_algorithms/partition_point/constexpr.cc: Ditto.
 422         * testsuite/25_algorithms/remove/constexpr.cc: Ditto.
 423         * testsuite/25_algorithms/remove_copy/constexpr.cc: Ditto.
 424         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: Ditto.
 425         * testsuite/25_algorithms/remove_if/constexpr.cc: Ditto.
 426         * testsuite/25_algorithms/replace_copy/constexpr.cc: Ditto.
 427         * testsuite/25_algorithms/replace_copy_if/constexpr.cc: Ditto.
 428         * testsuite/25_algorithms/replace_if/constexpr.cc: Ditto.
 429         * testsuite/25_algorithms/reverse_copy/constexpr.cc: Ditto.
 430         * testsuite/25_algorithms/rotate_copy/constexpr.cc: Ditto.
 431         * testsuite/25_algorithms/search/constexpr.cc: Ditto.
 432         * testsuite/25_algorithms/search_n/constexpr.cc: Ditto.
 433         * testsuite/25_algorithms/set_difference/constexpr.cc: Ditto.
 434         * testsuite/25_algorithms/set_intersection/constexpr.cc: Ditto.
 435         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc: Ditto.
 436         * testsuite/25_algorithms/set_union/constexpr.cc: Ditto.
 437         * testsuite/25_algorithms/transform/constexpr.cc: Ditto.
 438         * testsuite/25_algorithms/unique/constexpr.cc: Ditto.
 439         * testsuite/25_algorithms/unique_copy/constexpr.cc: Ditto.
 440         * testsuite/25_algorithms/upper_bound/constexpr.cc: Ditto.
 441
 442 2019-09-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
 443
 444         Update docs for recent <span> and constexpr lib changes.
 445         * doc/xml/manual/status_cxx2020.xml: Update p0202r3, p0858r0, p0879r0,
 446         p1023r0, p1085r2 status.
 447         * doc/html/manual/status.html: Regenerate.
 448
 449 2019-09-09  Antony Polukhin  <antoshkka@gmail.com>
 450
 451         * include/bits/charconv.h (__detail::__to_chars_10_impl): Replace
 452         final offsets with constants.
 453
 454 2019-09-09  Jonathan Wakely  <jwakely@redhat.com>
 455
 456         * include/bits/range_access.h (__adl_to_address): Remove.
 457         * include/std/span (__is_base_derived_safe_convertible_v): Replace
 458         with span::__is_compatible.
 459         (__is_std_array_v): Replace with __is_std_array class template and
 460         partial specializations.
 461         (__is_std_array, __is_std_span): New class templates and partial
 462         specializations.
 463         (span::__is_compatible): New alias template for SFINAE constraints.
 464         (span::span(element_type (&)[N])): Remove redundant constraints. Do
 465         not use __adl_data to obtain a pointer.
 466         (span::span(array<value_type, N>&)): Likewise.
 467         (span::span(const array<value_type, N>&)): Likewise.
 468         [_GLIBCXX_P1394] (span::iter_reference_t, span::iterator_t)
 469         (span::iter_value_t, span::derived_from): New alias templates for
 470         SFINAE constraints, until the equivalents are supported in <concepts>
 471         and <iterator>.
 472         [_GLIBCXX_P1394] (span::__is_compatible_iterator): New alias template
 473         for SFINAE constraints.
 474         [_GLIBCXX_P1394] (span::is_compatible_range): New class template for
 475         SFINAE constraints.
 476         [_GLIBCXX_P1394] (span::span(Range&&)): Improve constraints.
 477         [_GLIBCXX_P1394] (span::span(ContiguousIterator, Sentinel)): Likewise.
 478         Use std::to_address instead of __adl_to_address.
 479         [_GLIBCXX_P1394] (span::span(ContiguousIterator, size_type)): Likewise.
 480         [!_GLIBCXX_P1394] (span::__is_compatible_container): New alias
 481         template for SFINAE constraints.
 482         [!_GLIBCXX_P1394] (span::span(Container&))
 483         (span::span(const Container&)): Improve constraints.
 484         [!_GLIBCXX_P1394] (span::span(pointer, size_type))
 485         (span::span(pointer, pointer)): Remove redundant cast of pointer.
 486         (span(const span<OType, OExtent>&)): New constructor.
 487
 488 2019-09-06  Jonathan Wakely  <jwakely@redhat.com>
 489
 490         * include/bits/range_access.h (ssize): Define for C++20.
 491         * testsuite/24_iterators/range_access_cpp20.cc: New test.
 492         * doc/xml/manual/status_cxx2020.xml: Update P1227R2 status.
 493         * doc/html/*: Regenerate.
 494
 495 2019-09-06  Florian Weimer  <fweimer@redhat.com>
 496
 497         * configure: Regenerate.
 498
 499 2019-09-05  Jonathan Wakely  <jwakely@redhat.com>
 500
 501         * doc/xml/manual/status_cxx2020.xml: Update status for P0122R7 and
 502         P1024R3. Remove entry for P0920R2.
 503         * include/std/span  (__cpp_lib_span): Change value.
 504         (__extent_storage, __extent_storage<dynamic_extent>): Remove default
 505         constructor.
 506         (span): Replace __extent_storage base class with data member.
 507         (span::_S_subspan_extent): New function.
 508         (span::empty()): Add nodiscard attribute.
 509         (span::front, span::back, span::operator[]): Check preconditions.
 510         (span::first, span::last, span::subspan): Add noexcept. Improve
 511         precondition checks (LWG 3103).
 512         (get): Remove redundant condition from static_assert.
 513         (tuple_element<I, span<T, E>>): Fix static_assert message and simplify.
 514         (as_writable_bytes): Add inline specifier.
 515         * include/std/version (__cpp_lib_span): Change value.
 516         * testsuite/23_containers/span/back_neg.cc: Remove stray semi-colon.
 517         * testsuite/23_containers/span/front_neg.cc: Likewise.
 518         * testsuite/23_containers/span/index_op_neg.cc: Likewise.
 519         * testsuite/23_containers/span/last_neg.cc: Improve test.
 520         * testsuite/23_containers/span/subspan_neg.cc: Likewise.
 521         * testsuite/23_containers/span/1.cc: New test.
 522         * testsuite/23_containers/span/2.cc: New test.
 523         * testsuite/23_containers/span/back_assert_neg.cc: New test.
 524         * testsuite/23_containers/span/first_2_assert_neg.cc: New test.
 525         * testsuite/23_containers/span/first_assert_neg.cc: New test.
 526         * testsuite/23_containers/span/first_neg.cc: New test.
 527         * testsuite/23_containers/span/front_assert_neg.cc: New test.
 528         * testsuite/23_containers/span/index_op_assert_neg.cc: New test.
 529         * testsuite/23_containers/span/last_2_assert_neg.cc: New test.
 530         * testsuite/23_containers/span/last_assert_neg.cc: New test.
 531         * testsuite/23_containers/span/subspan_2_assert_neg.cc: New test.
 532         * testsuite/23_containers/span/subspan_3_assert_neg.cc: New test.
 533         * testsuite/23_containers/span/subspan_4_assert_neg.cc: New test.
 534         * testsuite/23_containers/span/subspan_5_assert_neg.cc: New test.
 535         * testsuite/23_containers/span/subspan_6_assert_neg.cc: New test.
 536         * testsuite/23_containers/span/subspan_assert_neg.cc: New test.
 537
 538 2019-09-05  JeanHeyd Meneide  <phdofthehouse@gmail.com>
 539
 540         * include/Makefile.am: Add <span> header.
 541         * include/Makefile.in: Regenerate.
 542         * include/bits/range_access.h (__adl_begin, __adl_end, __adl_cbegin)
 543         (__adl_cend, __adl_rbegin, __adl_rend, __adl_crbegin, __adl_crend)
 544         (__adl_data, __adl_cdata, __adl_size, __adl_empty, __adl_to_address):
 545         New functions for performing argument-dependent lookup of range
 546         customization points.
 547         * include/bits/stl_iterator.h (__normal_iterator): Add
 548         _GLIBCXX20_CONSTEXPR to all functions.
 549         * include/std/span: New header.
 550         * include/std/version (__cpp_lib_span): Define feature test macro.
 551         * testsuite/23_containers/span/contiguous_range_neg.cc: New test.
 552         * testsuite/23_containers/span/everything.cc: New test.
 553         * testsuite/23_containers/span/get_neg.cc: New test.
 554         * testsuite/23_containers/span/last_neg.cc: New test.
 555         * testsuite/23_containers/span/subspan_neg.cc: New test.
 556         * testsuite/23_containers/span/tuple_element_dynamic_neg.cc: New test.
 557         * testsuite/23_containers/span/tuple_element_oob_neg.cc: New test.
 558         * testsuite/23_containers/span/tuple_size_neg.cc: New test.
 559
 560 2019-09-05  Jonathan Wakely  <jwakely@redhat.com>
 561
 562         * doc/xml/manual/allocator.xml: Remove URL for bibliography entry.
 563         * doc/html/*: Regenerate.
 564
 565 2019-09-04  Mike Crowe  <mac@mcrowe.com>
 566
 567         PR libstdc++/41861
 568         * acinclude.m4 (GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT): Check for new
 569         pthread_cond_clockwait function.
 570         * configure.ac: Use GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT.
 571         * configure: Regenerate.
 572         * config.h.in: Regenerate.
 573         * include/std/condition_variable: (condition_variable): Rename
 574         __steady_clock_t typedef and add system_clock. Change __clock_t to be
 575         a typedef for the preferred clock to convert arbitrary other clocks to.
 576         [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT] (wait_until): Add a steady_clock
 577         overload.
 578         (wait_until): Change __clock_t overload to use system_clock.
 579         [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT] (__wait_until_impl): Add
 580         steady_clock overload that calls pthread_cond_clockwait.
 581         (__wait_until_impl): Change __clock_t overload to use system_clock.
 582         (condition_variable_any) [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT]: Use
 583         steady_clock for __clock_t if pthread_cond_clockwait is available.
 584
 585 2019-09-04  Mike Crowe  <mac@mcrowe.com>
 586
 587         * testsuite/30_threads/condition_variable/members/2.cc (test01):
 588         Parameterise so that test can be run against an arbitrary clock.
 589         (main): Test using std::chrono::steady_clock and a user-defined
 590         clock in addition to the previous std::chrono::system_clock.
 591         * testsuite/30_threads/condition_variable_any/members/2.cc: Likewise.
 592
 593 2019-09-03  Ulrich Weigand  <uweigand@de.ibm.com>
 594
 595         * crossconfig.m4: Remove references to spu.
 596         * configure: Regenerate.
 597         * doc/xml/manual/appendix_contributing.xml: Remove references
 598         to __ea as "badword" for spu.
 599         * doc/html/manual/source_code_style.html: Regenerate.
 600         * include/tr1/ell_integral.tcc (__ellint_rd): Do not attempt
 601         to avoid __ea (as "badword" for spu).
 602         (__ellint_rj): Likewise.
 603
 604 2019-09-03  Chung-Lin Tang  <cltang@codesourcery.com>
 605
 606         PR other/79543
 607         * acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Fix GNU ld --version
 608         scanning to conform to the GNU Coding Standards.
 609         * configure: Regenerate.
 610
 611 2019-09-02  Jonathan Wakely  <jwakely@redhat.com>
 612
 613         * src/c++17/memory_resource.cc: Use __constinit keyword.
 614
 615 2019-09-02  Jonathan Wakely  <jwakely@redhat.com>
 616
 617         * doc/xml/manual/abi.xml: Document 9.x library versions.
 618         * doc/html/*: Regenerate.
 619
 620 2019-09-02  Jonathan Wakely  <jwakely@redhat.com>
 621
 622         * include/std/charconv (__detail::__to_chars_2_len): Use std::log2p1.
 623         (__detail::__to_chars_8_len): Remove.
 624         (__detail::__to_chars_8): Inline length calculation here.
 625         (__detail::__from_chars_binary): Use numeric_limits instead of
 626         CHAR_BIT.
 627
 628 2019-09-02  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 629
 630         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
 631         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt: Likewise.
 632         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
 633         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
 634         Likewise.
 635
 636 2019-09-01  François Dumont  <fdumont@gcc.gnu.org>
 637
 638         * testsuite_files/util/testsuite_performance.h
 639         (resource_counter::start): Ignore unused malloc(0) result.
 640
 641 2019-09-01  Gerald Pfeifer  <gerald@pfeifer.com>
 642
 643         * doc/xml/manual/policy_data_structures_biblio.xml (COM: Component
 644         Model Object Technologies): Adjust name and link.
 645
 646 2019-08-30  Antony Polukhin  <antoshkka@gmail.com>
 647
 648         * include/std/charconv (__detail::__to_chars_8)
 649         __detail::__to_chars_16): Replace array of precomputed digits with
 650         arithmetic operations to avoid CPU cache misses. Remove zero
 651         termination from array of digits to allow symbol merge with generic
 652         implementation of __detail::__to_chars. Replace final offsets with
 653         constants. Use __detail::__to_chars_len_2 instead of a generic
 654         __detail::__to_chars_len.
 655         (__detail::__to_chars): Remove zero termination from array of digits.
 656         (__detail::__to_chars_2): Leading digit is always '1'.
 657
 658 2019-08-30  Jonathan Wakely  <jwakely@redhat.com>
 659
 660         * testsuite/23_containers/vector/cons/89164_c++17.cc: Fix errors.
 661
 662 2019-08-30  Uros Bizjak  <ubizjak@gmail.com>
 663
 664         * config/abi/post/alpha-linux-gnu/baseline_symbols.txt: Update.
 665
 666 2019-08-30  Jonathan Wakely  <jwakely@redhat.com>
 667
 668         PR libstdc++/89164
 669         * include/bits/stl_algobase.h (__copy_move): Give descriptive names
 670         to template parameters.
 671         * include/bits/stl_uninitialized.h (uninitialized_copy)
 672         (uninitialized_fill, uninitialized_fill_n): Add static assertions to
 673         diagnose invalid uses.
 674         * testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
 675         Adjust expected error.
 676         * testsuite/20_util/specialized_algorithms/uninitialized_copy/89164.cc:
 677         New test.
 678         * testsuite/20_util/specialized_algorithms/uninitialized_copy_n/
 679         89164.cc: New test.
 680         * testsuite/20_util/specialized_algorithms/uninitialized_fill/89164.cc:
 681         New test.
 682         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/
 683         89164.cc: New test.
 684         * testsuite/23_containers/vector/cons/89164.cc: New test.
 685         * testsuite/23_containers/vector/cons/89164_c++17.cc: New test.
 686
 687 2019-08-29  Jonathan Wakely  <jwakely@redhat.com>
 688
 689         PR libstdc++/91067
 690         * acinclude.m4 (libtool_VERSION): Bump to 6:28:0.
 691         * configure: Regenerate.
 692         * config/abi/pre/gnu.ver (GLIBCXX_3.4.28): Add new version. Export
 693         missing symbols.
 694         * testsuite/27_io/filesystem/iterators/91067.cc: Test move
 695         constructors.
 696         * testsuite/util/testsuite_abi.cc: Add new symbol version.
 697
 698 2019-08-29  Jakub Jelinek  <jakub@redhat.com>
 699
 700         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
 701         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
 702
 703 2019-08-28  Jonathan Wakely  <jwakely@redhat.com>
 704
 705         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
 706         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
 707         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
 708         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
 709         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
 710         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
 711         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
 712
 713 2019-08-23  Joseph Myers  <joseph@codesourcery.com>
 714
 715         * src/filesystem/ops-common.h [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
 716         (std::filesystem::__gnu_posix::lstat): Add return type.
 717
 718 2019-08-20  Jonathan Wakely  <jwakely@redhat.com>
 719
 720         * doc/doxygen/user.cfg.in (INPUT): Remove profile mode headers.
 721
 722         * include/std/numeric (reduce): Fix Doxygen markup.
 723
 724         PR libstdc++/91371
 725         * include/std/type_traits (is_function): Simplify definition. Remove
 726         partial specializations for function types.
 727         (__is_referenceable): Simplify definition.
 728         * testsuite/20_util/bind/91371.cc: New test.
 729         * testsuite/20_util/is_function/91371.cc: New test.
 730         * testsuite/20_util/is_function/value.cc: Check more pointer types.
 731         * testsuite/20_util/is_member_function_pointer/91371.cc: New test.
 732         * testsuite/20_util/is_object/91371.cc: New test.
 733
 734 2019-08-16  Uros Bizjak  <ubizjak@gmail.com>
 735
 736         * config/abi/post/alpha-linux-gnu/baseline_symbols.txt: Update.
 737
 738 2019-08-15  Jonathan Wakely  <jwakely@redhat.com>
 739
 740         PR libstdc++/91456
 741         * include/bits/std_function.h (__check_func_return_type): Remove.
 742         (function::_Callable): Use std::__is_invocable_impl instead of
 743         __check_func_return_type.
 744         * include/std/type_traits (__is_invocable_impl): Add another defaulted
 745         template parameter. Define a separate partial specialization for
 746         INVOKE and INVOKE<void>. For INVOKE<R> replace is_convertible check
 747         with a check that models delayed temporary materialization.
 748         * testsuite/20_util/function/91456.cc: New test.
 749         * testsuite/20_util/is_invocable/91456.cc: New test.
 750
 751 2019-08-14  Jonathan Wakely  <jwakely@redhat.com>
 752
 753         * include/std/type_traits (__is_nullptr_t): Add deprecated attribute.
 754
 755 2019-08-14  Edward Smith-Rowland  <3dw4rd@verizon.net>
 756
 757         Implement C++20 p0879 - Constexpr for swap and swap related functions.
 758         * include/std/version (__cpp_lib_constexpr_swap_algorithms): New macro.
 759         * include/bits/algorithmfwd.h (__cpp_lib_constexpr_swap_algorithms):
 760         New macro.
 761         (iter_swap, make_heap, next_permutation, partial_sort_copy, pop_heap)
 762         (prev_permutation, push_heap, reverse, rotate, sort_heap, swap)
 763         (swap_ranges, nth_element, partial_sort, sort): Add constexpr.
 764         * include/bits/move.h (swap): Add constexpr.
 765         * include/bits/stl_algo.h (__move_median_to_first, __reverse, reverse)
 766         (__gcd, __rotate, rotate, __partition, __heap_select)
 767         (__partial_sort_copy, partial_sort_copy, __unguarded_partition)
 768         (__unguarded_partition_pivot, __partial_sort, __introsort_loop, __sort)
 769         (__introselect, __chunk_insertion_sort, next_permutation)
 770         (prev_permutation, partition, partial_sort, nth_element, sort)
 771         (__iter_swap::iter_swap, iter_swap, swap_ranges): Add constexpr.
 772         * include/bits/stl_algobase.h (__iter_swap::iter_swap, iter_swap)
 773         (swap_ranges): Add constexpr.
 774         * include/bits/stl_heap.h (__push_heap, push_heap, __adjust_heap,
 775         __pop_heap, pop_heap, __make_heap, make_heap, __sort_heap, sort_heap):
 776         Add constexpr.
 777         * include/std/type_traits (swap): Add constexpr.
 778         * testsuite/25_algorithms/headers/algorithm/synopsis.cc: Add constexpr.
 779         * testsuite/25_algorithms/iter_swap/constexpr.cc: New test.
 780         * testsuite/25_algorithms/make_heap/constexpr.cc: New test.
 781         * testsuite/25_algorithms/next_permutation/constexpr.cc: New test.
 782         * testsuite/25_algorithms/nth_element/constexpr.cc: New test.
 783         * testsuite/25_algorithms/partial_sort/constexpr.cc: New test.
 784         * testsuite/25_algorithms/partial_sort_copy/constexpr.cc: New test.
 785         * testsuite/25_algorithms/partition/constexpr.cc: New test.
 786         * testsuite/25_algorithms/pop_heap/constexpr.cc: New test.
 787         * testsuite/25_algorithms/prev_permutation/constexpr.cc: New test.
 788         * testsuite/25_algorithms/push_heap/constexpr.cc: New test.
 789         * testsuite/25_algorithms/reverse/constexpr.cc: New test.
 790         * testsuite/25_algorithms/rotate/constexpr.cc: New test.
 791         * testsuite/25_algorithms/sort/constexpr.cc: New test.
 792         * testsuite/25_algorithms/sort_heap/constexpr.cc: New test.
 793         * testsuite/25_algorithms/swap/constexpr.cc: New test.
 794         * testsuite/25_algorithms/swap_ranges/constexpr.cc: New test.
 795
 796 2019-08-12  Jonathan Wakely  <jwakely@redhat.com>
 797
 798         PR libstdc++/90361
 799         * src/c++17/string-inst.cc: Use _GLIBCXX_USE_CXX11_ABI=1 by default.
 800
 801         * include/std/tuple (__unpack_std_tuple): New variable template and
 802         partial specializations.
 803         (apply, make_from_tuple): Add noexcept-specifier.
 804         * testsuite/20_util/tuple/apply/2.cc: New test.
 805         * testsuite/20_util/tuple/make_from_tuple/2.cc: New test.
 806
 807 2019-08-09  Corentin Gay  <gay@adacore.com>
 808
 809         * testsuite/ext/random/beta_distribution/operators/serialize.cc,
 810         testsuite/ext/random/hypergeometric_distribution/operators/serialize.cc,
 811         testsuite/ext/random/normal_mv_distribution/operators/serialize.cc,
 812         testsuite/ext/random/triangular_distribution/operators/serialize.cc,
 813         testsuite/ext/random/von_mises_distribution/operators/serialize.cc:
 814         Add call to `VERIFY`.
 815
 816 2019-08-09  Alexandre Oliva <oliva@adacore.com>
 817
 818         * include/ext/random
 819         (normal_mv_distribution::param_type::param_type): New private
 820         ctor taking a decomposed varcov matrix, for use by...
 821         (operator>>): ... this, befriended.
 822         * include/ext/random.tcc (operator>>): Use it.
 823         (normal_mv_distribution::param_type::_M_init_lower): Adjust
 824         member function name in exception message.
 825
 826 2019-08-08  Jonathan Wakely  <jwakely@redhat.com>
 827
 828         P0325R4 to_array from LFTS with updates
 829         * include/experimental/array (to_array): Qualify call to __to_array.
 830         * include/std/array (__cpp_lib_to_array, to_array): Define for C++20.
 831         * include/std/version (__cpp_lib_to_array): Likewise.
 832         * testsuite/23_containers/array/creation/1.cc: New test.
 833         * testsuite/23_containers/array/creation/2.cc: New test.
 834         * testsuite/23_containers/array/creation/3_neg.cc: New test.
 835         * testsuite/23_containers/array/tuple_interface/tuple_element_neg.cc:
 836         Use zero for dg-error line number.
 837
 838 2019-08-06  Jonathan Wakely  <jwakely@redhat.com>
 839
 840         P1651R0 bind_front should not unwrap reference_wrapper
 841         * include/std/functional (bind_front): Don't unwrap reference_wrapper.
 842         * include/std/version (__cpp_lib_bind_front): Update value.
 843         * testsuite/20_util/function_objects/bind_front/1.cc: Fix test for
 844         feature test macro.
 845         * testsuite/20_util/function_objects/bind_front/2.cc: New test.
 846
 847         * include/std/numbers [!__STRICT_ANSI__ && _GLIBCXX_USE_FLOAT128]
 848         (e_v, log2e_v, log10e_v, pi_v, inv_pi_v, inv_sqrtpi_v, ln2_v, ln10_v)
 849         (sqrt2_v, sqrt3_v, inv_sqrt3, egamma_v, phi_v): Add explicit
 850         specializations for __float128.
 851         * testsuite/26_numerics/numbers/float128.cc: New test.
 852
 853 2019-08-04  Gerald Pfeifer  <gerald@pfeifer.com>
 854
 855         * doc/xml/manual/documentation_hacking.xml: doxygen.org is now
 856         doxygen.nl.
 857
 858 2019-08-01  Edward Smith-Rowland  <3dw4rd@verizon.net>
 859
 860         Implement C++20 p0202 - Add Constexpr Modifiers to Functions
 861         in <algorithm> and <utility> Headers.
 862         Implement C++20 p1023 - constexpr comparison operators for std::array.
 863         * include/bits/algorithmfwd.h (all_of, any_of, binary_search, copy,
 864         copy_backward, copy_if, copy_n, equal_range, fill, find_end,
 865         find_if_not, includes, is_heap, is_heap_until, is_partitioned,
 866         is_permutation, is_sorted, is_sorted_until, iter_swap, lower_bound,
 867         none_of, partition_copy, partition_point, remove, remove_if,
 868         remove_copy, remove_copy_if, replace_copy, replace_copy_if,
 869         reverse_copy, rotate_copy, uunique, upper_bound, adjacent_find, count,
 870         count_if, equal, find, find_first_of, find_if, for_each, generate,
 871         generate_n, lexicographical_compare, merge, mismatch, replace,
 872         replace_if, search, search_n, set_difference, set_intersection,
 873         set_symmetric_difference, set_union, transform, unique_copy):
 874         Mark constexpr.
 875         * include/bits/cpp_type_traits.h (__miter_base): Mark constexpr.
 876         * include/bits/predefined_ops.h (_Iter_less_val::operator(),
 877         _Val_less_iter::operator(), _Iter_equal_to_iter::operator(),
 878         _Iter_equal_to_val::operator(), _Iter_equals_val::operator()):
 879          Use const ref instead of ref arg;
 880         (_Iter_less_val, __iter_less_val, _Val_less_iter, __val_less_iter,
 881         __iter_equal_to_iter, __iter_equal_to_val, __iter_comp_val,
 882         _Iter_comp_val, _Val_comp_iter, __val_comp_iter, __iter_equals_val,
 883         _Iter_equals_iter, __iter_comp_iter, _Iter_pred, __pred_iter,
 884         _Iter_comp_to_val, __iter_comp_val, _Iter_comp_to_iter,
 885         __iter_comp_iter): Mark constexpr.
 886         * include/bits/stl_algo.h (__find_if, __find_if_not, __find_if_not_n,
 887         __search, __search_n_aux, __search_n, __find_end, find_end, all_of,
 888         none_of, any_of, find_if_not, is_partitioned, partition_point,
 889         __remove_copy_if, remove_copy, remove_copy_if, copy_if, __copy_n,
 890         copy_n, partition_copy, __remove_if, remove, remove_if, __adjacent_find,
 891         __unique, unique, __unique_copy, reverse_copy, rotate_copy,
 892         __unguarded_linear_insert, __insertion_sort, __unguarded_insertion_sort,
 893         __final_insertion_sort, lower_bound, __upper_bound, upper_bound,
 894         __equal_range, equal_range, binary_search, __includes, includes,
 895         __next_permutation, __prev_permutation, __replace_copy_if, replace_copy,
 896         replace_copy_if, __count_if, is_sorted, __is_sorted_until,
 897         is_sorted_until, __is_permutation, is_permutation, for_each, find,
 898         find_if, find_first_of, adjacent_find, count, count_if, search,
 899         search_n, transform, replace, replace_if, generate, generate_n,
 900         unique_copy, __merge, merge, __set_union, set_union, __set_intersection,
 901         set_intersection, __set_difference, set_difference,
 902         __set_symmetric_difference, set_symmetric_difference):  Mark constexpr.
 903         * include/bits/stl_algobase.h (__memmove, __memcmp): New maybe constexpr
 904         wrappers around __builtin_memmove and __builtin_memcmp
 905         respectively;
 906         (__niter_base, __niter_wrap, __copy_m, __copy_move_a, __copy_move_a2,
 907         copy, move, __copy_move_b, __copy_move_backward_a,
 908         __copy_move_backward_a2, copy_backward, move_backward, __fill_a, fill,
 909         __fill_n_a, fill_n, equal, __lc_rai::__newlast1, __lc_rai::__cnd2,
 910         __lexicographical_compare_impl, __lexicographical_compare,
 911         __lexicographical_compare<true>::__lc, __lexicographical_compare_aux,
 912         __lower_bound, lower_bound, equal, __equal4, lexicographical_compare,
 913         __mismatch, mismatch, __is_heap_until, __is_heap, is_heap_until,
 914         is_heap): Mark constexpr.
 915         * include/bits/stl_heap.h (__is_heap_until, __is_heap, is_heap_until,
 916         is_heap): Mark constexpr.
 917         * include/bits/stl_iterator.h (__niter_base, __miter_base): Mark constexpr.
 918         * include/std/array: Make comparison ops constexpr.
 919         * include/std/utility: Make exchange constexpr.
 920         * include/std/version (__cpp_lib_constexpr_algorithms): New macro.
 921         * testsuite/23_containers/array/tuple_interface/get_neg.cc: Adjust.
 922         * testsuite/23_containers/array/tuple_interface/
 923         tuple_element_neg.cc: Adjust.
 924         * testsuite/20_util/exchange/constexpr.cc: New.
 925         * testsuite/23_containers/array/comparison_operators/constexpr.cc: New.
 926         * testsuite/25_algorithms/constexpr_macro.cc: New.
 927         * testsuite/25_algorithms/adjacent_find/constexpr.cc: New.
 928         * testsuite/25_algorithms/all_of/constexpr.cc: New.
 929         * testsuite/25_algorithms/any_of/constexpr.cc: New.
 930         * testsuite/25_algorithms/binary_search/constexpr.cc: New.
 931         * testsuite/25_algorithms/copy/constexpr.cc: New.
 932         * testsuite/25_algorithms/copy_backward/constexpr.cc: New.
 933         * testsuite/25_algorithms/copy_if/constexpr.cc: New.
 934         * testsuite/25_algorithms/copy_n/constexpr.cc: New.
 935         * testsuite/25_algorithms/count/constexpr.cc: New.
 936         * testsuite/25_algorithms/count_if/constexpr.cc: New.
 937         * testsuite/25_algorithms/equal/constexpr.cc: New.
 938         * testsuite/25_algorithms/equal_range/constexpr.cc: New.
 939         * testsuite/25_algorithms/fill/constexpr.cc: New.
 940         * testsuite/25_algorithms/fill_n/constexpr.cc: New.
 941         * testsuite/25_algorithms/find/constexpr.cc: New.
 942         * testsuite/25_algorithms/find_end/constexpr.cc: New.
 943         * testsuite/25_algorithms/find_first_of/constexpr.cc: New.
 944         * testsuite/25_algorithms/find_if/constexpr.cc: New.
 945         * testsuite/25_algorithms/find_if_not/constexpr.cc: New.
 946         * testsuite/25_algorithms/for_each/constexpr.cc: New.
 947         * testsuite/25_algorithms/generate/constexpr.cc: New.
 948         * testsuite/25_algorithms/generate_n/constexpr.cc: New.
 949         * testsuite/25_algorithms/is_heap/constexpr.cc: New.
 950         * testsuite/25_algorithms/is_heap_until/constexpr.cc: New.
 951         * testsuite/25_algorithms/is_partitioned/constexpr.cc: New.
 952         * testsuite/25_algorithms/is_permutation/constexpr.cc: New.
 953         * testsuite/25_algorithms/is_sorted/constexpr.cc: New.
 954         * testsuite/25_algorithms/is_sorted_until/constexpr.cc: New.
 955         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc: New.
 956         * testsuite/25_algorithms/lower_bound/constexpr.cc: New.
 957         * testsuite/25_algorithms/merge/constexpr.cc: New.
 958         * testsuite/25_algorithms/mismatch/constexpr.cc: New.
 959         * testsuite/25_algorithms/none_of/constexpr.cc: New.
 960         * testsuite/25_algorithms/partition_copy/constexpr.cc: New.
 961         * testsuite/25_algorithms/partition_point/constexpr.cc: New.
 962         * testsuite/25_algorithms/remove/constexpr.cc: New.
 963         * testsuite/25_algorithms/remove_copy/constexpr.cc: New.
 964         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: New.
 965         * testsuite/25_algorithms/remove_if/constexpr.cc: New.
 966         * testsuite/25_algorithms/replace_copy/constexpr.cc: New.
 967         * testsuite/25_algorithms/replace_copy_if/constexpr.cc: New.
 968         * testsuite/25_algorithms/replace_if/constexpr.cc: New.
 969         * testsuite/25_algorithms/reverse_copy/constexpr.cc: New.
 970         * testsuite/25_algorithms/rotate_copy/constexpr.cc: New.
 971         * testsuite/25_algorithms/search/constexpr.cc: New.
 972         * testsuite/25_algorithms/search_n/constexpr.cc: New.
 973         * testsuite/25_algorithms/set_difference/constexpr.cc: New.
 974         * testsuite/25_algorithms/set_intersection/constexpr.cc: New.
 975         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc: New.
 976         * testsuite/25_algorithms/set_union/constexpr.cc: New.
 977         * testsuite/25_algorithms/transform/constexpr.cc: New.
 978         * testsuite/25_algorithms/unique/constexpr.cc: New.
 979         * testsuite/25_algorithms/unique_copy/constexpr.cc: New.
 980         * testsuite/25_algorithms/upper_bound/constexpr.cc: New.
 981
 982 2019-07-31  Jonathan Wakely  <jwakely@redhat.com>
 983
 984         * include/std/memory (make_obj_using_allocator): Qualify call to
 985         uses_allocator_construction_args.
 986
 987         P0631R4 Math Constants
 988         * include/Makefile.am: Add new header.
 989         * include/Makefile.in: Regenerate.
 990         * include/precompiled/stdc++.h: Include new header.
 991         * include/std/numbers: New header.
 992         * include/std/version (__cpp_lib_math_constants): Define.
 993         * testsuite/26_numerics/numbers/1.cc: New test.
 994         * testsuite/26_numerics/numbers/2.cc: New test.
 995         * testsuite/26_numerics/numbers/3.cc: New test.
 996         * testsuite/26_numerics/numbers/nonfloat_neg.cc: New test.
 997
 998         * include/std/bit: Add Doxygen comments.
 999
1000         PR libstdc++/91308
1001         * include/bits/unique_ptr.h (unique_ptr::__safe_conversion_up): Remove
1002         constraints on deleter that should only apply to the constructor.
1003         (unique_ptr<T[], D>::__safe_conversion_up): Likewise.
1004         (unique_ptr<T[], D>::unique_ptr(unique_ptr<U, D>&&)): Restore
1005         constraints on deleter here.
1006         * testsuite/20_util/unique_ptr/assign/91308.cc: New test.
1007
1008 2019-07-29  Jonathan Wakely  <jwakely@redhat.com>
1009
1010         PR libstdc++/51333
1011         * libsupc++/cxxabi.h (__gnu_cxx::recursive_init_error): Do not define
1012         constructor inline.
1013         * libsupc++/guard_error.cc (__gnu_cxx::recursive_init_error): Define
1014         constructor.
1015         * testsuite/18_support/51333.cc: New test.
1016
1017 2019-07-28  Gerald Pfeifer  <gerald@pfeifer.com>
1018
1019         * doc/xml/manual/documentation_hacking.xml: Fix broken reference
1020         to the Doxygen manual. Avoid a "here" link on the way.
1021         Fix another broken link to Doxygen docblocks.
1022
1023 2019-07-26  Jonathan Wakely  <jwakely@redhat.com>
1024
1025         * include/std/bit (__cpp_lib_endian): Define.
1026         * include/std/version (__cpp_lib_endian): Define.
1027         * testsuite/26_numerics/endian/2.cc: New.
1028         * testsuite/26_numerics/endian/3.cc: New.
1029         * testsuite/26_numerics/endian/4.cc: New.
1030
1031 2019-07-26  François Dumont  <fdumont@gcc.gnu.org>
1032
1033         * testsuite/util/testsuite_iterators.h
1034         (bidirectional_iterator_wrapper): Fix type comment.
1035         (random_access_iterator_wrapper): Likewise.
1036
1037 2019-07-25  Jonathan Wakely  <jwakely@redhat.com>
1038
1039         * include/std/bit (endian): Move definition here as per P1612R1.
1040         * include/std/type_traits (endian): Remove definition from here.
1041         * testsuite/20_util/endian/1.cc: Rename to ...
1042         * testsuite/26_numerics/endian/1.cc: ... here. Adjust header.
1043
1044 2019-07-25  Martin Liska  <mliska@suse.cz>
1045             Dominik Infuhr  <dominik.infuehr@theobroma-systems.com>
1046
1047         PR c++/23383
1048         * testsuite/ext/bitmap_allocator/check_delete.cc: Add
1049         -fno-allocation-dce.
1050         * testsuite/ext/bitmap_allocator/check_new.cc: Likewise.
1051         * testsuite/ext/new_allocator/check_delete.cc: Likewise.
1052         * testsuite/ext/new_allocator/check_new.cc: Likewise.
1053
1054 2019-07-22  Jonathan Wakely  <jwakely@redhat.com>
1055
1056         * testsuite/26_numerics/bit/bitops.count/*: Rename to ...
1057         * testsuite/26_numerics/bit/bit.count/*: Here.
1058
1059         * include/std/bit (__rotl, __rotr): Change second parameter from
1060         unsigned int to int and handle negative values.
1061         (rotl, rotr): Remove check for __STRICT_ANSI__. Change second
1062         parameter from unsigned int to int. Add nodiscard attribute.
1063         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Rename to ...
1064         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Here. Test negative
1065         shifts.
1066         * testsuite/26_numerics/bit/bitops.rot/rotr.cc: Rename to ...
1067         * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Here. Test negative
1068         shifts.
1069
1070         * include/std/bit (__ceil2): Make unrepresentable results undefined,
1071         as per P1355R2. Add debug assertion. Perform one left shift, not two,
1072         so that out of range values cause undefined behaviour. Ensure that
1073         shift will still be undefined if left operand is promoted.
1074         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Replace checks for
1075         unrepresentable values with checks that they are not core constant
1076         expressions.
1077         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: New test.
1078
1079 2019-07-19  François Dumont  <fdumont@gcc.gnu.org>
1080
1081         * include/bits/stl_tempbuf.h (__detail::__return_temporary_buffer): Fix
1082         sized deallocation size computation.
1083
1084 2019-07-19  Andreas Schwab  <schwab@linux-m68k.org>
1085
1086         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
1087
1088 2019-07-18  François Dumont  <fdumont@gcc.gnu.org>
1089
1090         * include/bits/stl_tempbuf.h (__detail::__return_temporary_buffer): New.
1091         (~_Temporary_buffer()): Use latter.
1092         (_Temporary_buffer(_FIterator, size_type)): Likewise.
1093
1094 2019-07-17  Andreas Schwab  <schwab@suse.de>
1095
1096         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.
1097
1098 2019-07-16  Jason Merrill  <jason@redhat.com>
1099
1100         * include/std/memory (uses_allocator_construction_args): Add parens
1101         around constraint.
1102
1103 2019-07-12  Jonathan Wakely  <jwakely@redhat.com>
1104
1105         * testsuite/29_atomics/atomic_float/1.cc: Fix comment.
1106
1107         * include/experimental/string_view (__detail::__idt): Remove.
1108         (operator==, operator!=, operator<, operator>, operator<=, operator>=):
1109         Use __type_identity_t instead of __detail::__idt;
1110         * include/std/string_view (__detail::__idt): Remove.
1111         (operator==, operator!=, operator<, operator>, operator<=, operator>=):
1112         Use __type_identity_t instead of __detail::__idt;
1113         * include/std/type_traits (__type_identity_t): New alias template.
1114
1115         * doc/xml/manual/status_cxx2020.xml: Update status for atomic_ref
1116         and floating point atomics.
1117
1118 2019-07-11  Jonathan Wakely  <jwakely@redhat.com>
1119
1120         * doc/xml/manual/configure.xml: Improve documentation of
1121         --enable-libstdcxx-time option.
1122
1123         * include/bits/atomic_base.h (__atomic_impl): New namespace for
1124         wrappers around atomic built-ins.
1125         (__atomic_float, __atomic_ref): New class templates for use as base
1126         classes.
1127         * include/std/atomic (atomic<float>, atomic<double>)
1128         (atomic<long double>): New explicit specializations.
1129         (atomic_ref): New class template.
1130         (__cpp_lib_atomic_ref): Define.
1131         * include/std/version (__cpp_lib_atomic_ref): Define.
1132         * testsuite/29_atomics/atomic/60695.cc: Adjust dg-error.
1133         * testsuite/29_atomics/atomic_float/1.cc: New test.
1134         * testsuite/29_atomics/atomic_float/requirements.cc: New test.
1135         * testsuite/29_atomics/atomic_ref/deduction.cc: New test.
1136         * testsuite/29_atomics/atomic_ref/float.cc: New test.
1137         * testsuite/29_atomics/atomic_ref/generic.cc: New test.
1138         * testsuite/29_atomics/atomic_ref/integral.cc: New test.
1139         * testsuite/29_atomics/atomic_ref/pointer.cc: New test.
1140         * testsuite/29_atomics/atomic_ref/requirements.cc: New test.
1141
1142 2019-07-06  Jonathan Wakely  <jwakely@redhat.com>
1143
1144         * include/ext/atomicity.h (__exchange_and_add, __atomic_add): Replace
1145         throw() with _GLIBCXX_NOTHROW.
1146         (__atomic_add_dispatch): Return after performing atomic increment.
1147
1148 2019-07-05  Jonathan Wakely  <jwakely@redhat.com>
1149
1150         * include/ext/atomicity.h [_GLIBCXX_ATOMIC_BUILTINS] (__atomic_add)
1151         (__exchange_and_add): Replace static specifier with always_inline
1152         attribute.
1153         (__exchange_and_add_single, __atomic_add_single): Likewise.
1154         (__exchange_and_add_dispatch, __atomic_add_dispatch): Likewise. Also
1155         combine !__gthread_active_p() and !__GTHREADS branches.
1156
1157 2019-07-03  Jonathan Wakely  <jwakely@redhat.com>
1158
1159         PR libstdc++/91067
1160         * acinclude.m4 (libtool_VERSION): Bump to 6:27:0.
1161         * configure: Regenerate.
1162         * config/abi/pre/gnu.ver (GLIBCXX_3.4.27): Add new version. Export
1163         missing symbols.
1164         * testsuite/27_io/filesystem/iterators/91067.cc: New test.
1165         * testsuite/util/testsuite_abi.cc: Add new symbol version.
1166
1167 2019-07-02  Jonathan Wakely  <jwakely@redhat.com>
1168
1169         * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_LAUNDER)
1170         (_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED): Use __has_builtin
1171         instead of __is_identifier to detect Clang support.
1172
1173 2019-07-02  Jim Wilson  <jimw@sifive.com>
1174
1175         * configure.ac (BUILD_PDF): Also test for doxygen, dot, xsltproc,
1176         and xmllint.
1177         * configure: Regenerate.
1178
1179 2019-06-27  Jonathan Wakely  <jwakely@redhat.com>
1180
1181         PR libstdc++/91012
1182         * src/c++17/fs_path.cc (filesystem_error::_Impl): Use a string_view
1183         for the what_arg parameters.
1184         (filesystem_error::filesystem_error): Pass system_error::what() to
1185         the _Impl constructor.
1186         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Ensure that
1187         filesystem_error::what() contains system_error::what().
1188
1189 2019-06-26  Jonathan Wakely  <jwakely@redhat.com>
1190
1191         * include/std/charconv (chars_format): Define bitmask type.
1192         * testsuite/20_util/to_chars/chars_format.cc: New test.
1193
1194         * include/bits/fs_path.h (path::__is_encoded_char): Use __is_one_of.
1195         * include/std/bit (_If_is_unsigned_integer_type): Remove.
1196         (_If_is_unsigned_integer): Use __is_unsigned_integer.
1197         (rotl(byte, unsigned), rotr(byte, unsigned), countl_zero(byte))
1198         (countl_one(byte), countr_zero(byte), countr_one(byte))
1199         (popcount(byte), ispow2(byte), ceil2(byte), floor2(byte))
1200         (log2p1(byte)): Remove.
1201         * include/std/charconv (__detail::__is_one_of): Move to <type_traits>.
1202         (__detail::__is_int_to_chars_type): Remove.
1203         (__detail::__integer_to_chars_result_type): Use __is_signed_integer
1204         and __is_unsigned_integer.
1205         * include/std/type_traits (__is_one_of): Move here from <charconv>.
1206         (__is_signed_integer, __is_unsigned_integer): New helpers.
1207         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Remove test for
1208         std::byte overload.
1209         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
1210         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
1211         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
1212         * testsuite/26_numerics/bit/bitops.count/countl_one.cc: Likewise.
1213         * testsuite/26_numerics/bit/bitops.count/countl_zero.cc: Likewise.
1214         * testsuite/26_numerics/bit/bitops.count/countr_one.cc: Likewise.
1215         * testsuite/26_numerics/bit/bitops.count/countr_zero.cc: Likewise.
1216         * testsuite/26_numerics/bit/bitops.count/popcount.cc: Likewise.
1217         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Likewise.
1218         * testsuite/26_numerics/bit/bitops.rot/rotr.cc: Likewise.
1219
1220 2019-06-25  Jonathan Wakely  <jwakely@redhat.com>
1221
1222         * include/std/numeric (midpoint(T, T)): Avoid std::abs in constexpr
1223         function.
1224
1225 2019-06-25  Jakub Jelinek  <jakub@redhat.com>
1226
1227         * include/pstl/pstl_config.h (_PSTL_PRAGMA_SIMD_SCAN,
1228         _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN, _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN):
1229         Define to OpenMP 5.0 pragmas even for GCC 10.0+.
1230         (_PSTL_UDS_PRESENT): Define to 1 for GCC 10.0+.
1231
1232 2019-06-24  Jonathan Wakely  <jwakely@redhat.com>
1233
1234         * include/std/numeric (midpoint(T, T)): Change implementation for
1235         floating-point types to avoid incorrect rounding of denormals.
1236         * testsuite/26_numerics/midpoint/floating.cc: Add check for correct
1237         rounding with denormals.
1238         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line numbers.
1239         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
1240
1241         * testsuite/18_support/headers/cfloat/values_c++17.cc: New test.
1242
1243 2019-06-20  Jonathan Wakely  <jwakely@redhat.com>
1244
1245         * acinclude.m4 (GLIBCXX_ENABLE_DEBUG): Only do debug build for final
1246         stage of bootstrap.
1247         * configure: Regenerate.
1248
1249         * include/std/variant (_Variant_storage, _Extra_visit_slot_needed):
1250         Qualify calls to __never_valueless.
1251
1252         * doc/xml/manual/status_cxx2017.xml: Fix outdated reference to
1253         C++17 working draft.
1254
1255         * testsuite/libstdc++-prettyprinters/simple.cc: Use non-palindromic
1256         vector<bool> for test.
1257         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
1258
1259 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
1260
1261         * include/bits/stream_iterator.h (istream_iterator::_M_equal()): Make
1262         private.
1263         (istream_iterator::_M_read()): Do not check stream state before
1264         attempting extraction. Set stream pointer to null when extraction
1265         fails (P0738R2).
1266         (operator==(const istream_iterator&, const istream_iterator&)): Change
1267         to be a hidden friend of istream_iterator.
1268         (operator!=(const istream_iterator&, const istream_iterator&)):
1269         Likewise.
1270         (ostream_iterator::ostream_iterator()): Add default constructor.
1271         (ostream_iterator::ostream_iterator(ostream_type*, const C*)): Use
1272         addressof.
1273         * testsuite/24_iterators/istream_iterator/1.cc: New test.
1274         * testsuite/24_iterators/ostream_iterator/1.cc: New test.
1275         * testsuite/24_iterators/ostream_iterator/70766.cc: Also check
1276         constructor taking a string.
1277         * testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
1278         New test.
1279
1280 2019-06-19  Michael Weghorn  <m.weghorn@posteo.de>
1281             Jonathan Wakely  <jwakely@redhat.com>
1282
1283         PR libstdc++/90945
1284         * python/libstdcxx/v6/printers.py (StdVectorPrinter._iterator): Use
1285         values of type bool for vector<bool> elements.
1286         * testsuite/libstdc++-prettyprinters/simple.cc: Test vector<bool>.
1287         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
1288
1289 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
1290
1291         PR libstdc++/90920 partially revert r263433
1292         * include/bits/stl_algo.h (__rotate): Restore checks for empty ranges.
1293         (rotate): Remove checks.
1294         * testsuite/25_algorithms/rotate/90920.cc: New test.
1295
1296         * include/std/numeric (reduce(Iter, Iter, T, BinOp)): Fix value
1297         category used in invocable check.
1298         (reduce(Iter, Iter, T)): Pass initial value as rvalue.
1299         * testsuite/26_numerics/reduce/2.cc: New test.
1300
1301 2019-06-18  Jonathan Wakely  <jwakely@redhat.com>
1302
1303         * include/bits/algorithmfwd.h: Change title of doc group.
1304         * include/bits/stl_algo.h (for_each_n): Add new C++17 algorithm from
1305         P0024R2.
1306         * include/bits/stl_numeric.h: Define doc group and add algos to it.
1307         * include/std/numeric (__is_random_access_iter): New internal trait.
1308         (reduce, transform_reduce, exclusive_scan, inclusive_scan)
1309         (transform_exclusive_scan, transform_inclusive_scan): Likewise.
1310         * testsuite/25_algorithms/for_each/for_each_n.cc: New test.
1311         * testsuite/26_numerics/exclusive_scan/1.cc: New test.
1312         * testsuite/26_numerics/inclusive_scan/1.cc: New test.
1313         * testsuite/26_numerics/reduce/1.cc: New test.
1314         * testsuite/26_numerics/transform_exclusive_scan/1.cc: New test.
1315         * testsuite/26_numerics/transform_inclusive_scan/1.cc: New test.
1316         * testsuite/26_numerics/transform_reduce/1.cc: New test.
1317         * testsuite/util/testsuite_iterators.h (test_container::size()): New
1318         member function.
1319
1320         * include/c_global/cstddef (std::byte): Perform arithmetic operations
1321         in unsigned int to avoid promotion (LWG 2950).
1322
1323 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
1324
1325         * testsuite/20_util/allocator/1.cc: Add sized delete, which fixes a
1326         failure on AIX.
1327
1328         * include/c_global/cmath (__lerp, lerp): Add noexcept (LWG 3201).
1329
1330         PR libstdc++/90281 Fix string conversions for filesystem::path
1331         * include/bits/fs_path.h (u8path) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
1332         Use codecvt_utf8_utf16 instead of codecvt_utf8. Use
1333         __str_codecvt_in_all to fail for partial conversions and throw on
1334         error.
1335         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS && _GLIBCXX_USE_CHAR8_T]
1336         (path::_Cvt<char8_t>): Add explicit specialization.
1337         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Remove
1338         overloads.
1339         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
1340         if-constexpr instead of dispatching to _S_wconvert. Use codecvt
1341         instead of codecvt_utf8. Use __str_codecvt_in_all and
1342         __str_codecvt_out_all.
1343         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
1344         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
1345         (path::_S_str_convert) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
1346         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
1347         with allocator. Use __str_codecvt_out_all. Fallthrough to POSIX code
1348         after converting to UTF-8.
1349         (path::_S_str_convert): Use codecvt instead of codecvt_utf8. Use
1350         __str_codecvt_in_all.
1351         (path::string): Fix initialization of string types with different
1352         allocators.
1353         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
1354         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
1355         * include/bits/locale_conv.h (__do_str_codecvt): Reorder static and
1356         runtime conditions.
1357         (__str_codecvt_out_all, __str_codecvt_in_all): New functions that
1358         return false for partial conversions.
1359         * include/experimental/bits/fs_path.h (u8path):
1360         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Implement correctly for mingw.
1361         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Add
1362         missing handling for char8_t. Use codecvt and codecvt_utf8_utf16
1363         instead of codecvt_utf8. Use __str_codecvt_in_all and
1364         __str_codecvt_out_all.
1365         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
1366         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
1367         (path::string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
1368         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
1369         with allocator. Use __str_codecvt_out_all and __str_codecvt_in_all.
1370         (path::string) [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
1371         __str_codecvt_in_all.
1372         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
1373         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
1374         * src/c++17/fs_path.cc (path::_S_convert_loc): Use
1375         __str_codecvt_in_all.
1376         * src/filesystem/path.cc (path::_S_convert_loc): Likewise.
1377         * testsuite/27_io/filesystem/path/construct/90281.cc: New test.
1378         * testsuite/27_io/filesystem/path/factory/u8path.cc: New test.
1379         * testsuite/27_io/filesystem/path/native/string.cc: Test with empty
1380         strings and with Unicode characters outside the basic multilingual
1381         plane.
1382         * testsuite/27_io/filesystem/path/native/alloc.cc: New test.
1383         * testsuite/experimental/filesystem/path/construct/90281.cc: New test.
1384         * testsuite/experimental/filesystem/path/factory/u8path.cc: New test.
1385         * testsuite/experimental/filesystem/path/native/alloc.cc: New test.
1386         * testsuite/experimental/filesystem/path/native/string.cc: Test with
1387         empty strings and with Unicode characters outside the basic
1388         multilingual plane.
1389
1390 2019-06-17  François Dumont  <fdumont@gcc.gnu.org>
1391             Jonathan Wakely  <jwakely@redhat.com>
1392
1393         * include/bits/hashtable.h (struct _Hashtable::_Scoped_node): New type.
1394         (_Hashtable::_M_insert_unique_node): Add key_type parameter. Don't
1395         deallocate node if insertion fails.
1396         (_Hashtable::_M_insert_multi_node): Likewise.
1397         (_Hashtable::_M_reinsert_node): Pass additional key argument.
1398         (_Hashtable::_M_reinsert_node_multi): Likewise. Remove FIXME.
1399         (_Hashtable::_M_extract_node(size_t, __node_base*)): New function.
1400         (_Hashtable::extract(const_iterator)): Use _M_extract_node.
1401         (_Hashtable::extract(const _Key&)): Likewise.
1402         (_Hashtable::_M_merge_unique): Pass additional key argument.
1403         (_Hashtable::_M_emplace<Args>(true_type, Args&&...)): Likewise. Use
1404         _Scoped_node.
1405         (_Hashtable::_M_insert): Likewise.
1406         * include/bits/hashtable_policy.h (_Map_base::operator[]): Likewise.
1407         (_Hashtable_alloc): Add comments to functions with misleading names.
1408
1409 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
1410
1411         * testsuite/20_util/bad_function_call/what.cc: Include <string> header
1412         for std::string.
1413         * testsuite/20_util/shared_ptr/cons/weak_ptr_expired.cc: Likewise.
1414         * testsuite/20_util/tuple/cons/allocator_with_any.cc: Include <memory>
1415         header for std::allocator.
1416         * testsuite/23_containers/array/tuple_interface/tuple_element.cc: Add
1417         using-declaration for std::size_t.
1418         * testsuite/23_containers/array/tuple_interface/tuple_size.cc:
1419         Likewise.
1420         * testsuite/23_containers/deque/cons/55977.cc: Include <istream> for
1421         std::istream.
1422         * testsuite/23_containers/vector/cons/55977.cc: Likewise.
1423         * testsuite/experimental/map/erasure.cc: Include <string> for
1424         std::string.
1425         * testsuite/experimental/unordered_map/erasure.cc: Likewise.
1426
1427 2019-06-14  Jonathan Wakely  <jwakely@redhat.com>
1428
1429         * include/experimental/type_traits (experimental::nonesuch): Use
1430         pragma to disable -Wctor-dtor-privacy warnings.
1431         * include/std/type_traits (__is_convertible_helper<From, To, false>)
1432         (__is_nt_convertible_helper<From, To, false>, __nonesuch): Likewise.
1433
1434         * include/std/version (__cpp_lib_bind_front): Add missing macro.
1435
1436 2019-06-12  Jonathan Wakely  <jwakely@redhat.com>
1437
1438         * include/std/algorithm (__cpp_lib_parallel_algorithm): Fix value.
1439         * include/std/memory (__cpp_lib_parallel_algorithm): Likewise.
1440         * include/std/numeric (__cpp_lib_parallel_algorithm): Likewise.
1441         * testsuite/25_algorithms/pstl/feature_test.cc: New test.
1442
1443         * include/std/variant (get<T>, get<N>, get_if<N>, get_if<T>)
1444         (variant::emplace): Change static_assert messages from "should be"
1445         to "must be".
1446         (hash<monostate>::operator()): Remove name of unused parameter.
1447
1448         * include/std/mutex (scoped_lock::~scoped_lock()): Use fold
1449         expression.
1450
1451         * include/Makefile.am: Add new <bits/charconv.h> header.
1452         * include/Makefile.in: Regenerate.
1453         * include/bits/basic_string.h (to_string(int), to_string(unsigned))
1454         (to_string(long), to_string(unsigned long), to_string(long long))
1455         (to_string(unsigned long long)): Rewrite to use __to_chars_10_impl.
1456         * include/bits/charconv.h: New header.
1457         (__detail::__to_chars_len): Move here from <charconv>.
1458         (__detail::__to_chars_10_impl): New function extracted from
1459         __detail::__to_chars_10.
1460         * include/std/charconv (__cpp_lib_to_chars): Add, but comment out.
1461         (__to_chars_unsigned_type): New class template that reuses
1462         __make_unsigned_selector_base::__select to pick a type.
1463         (__unsigned_least_t): Redefine as __to_chars_unsigned_type<T>::type.
1464         (__detail::__to_chars_len): Move to new header.
1465         (__detail::__to_chars_10): Add inline specifier. Move code doing the
1466         output to __detail::__to_chars_10_impl and call that.
1467         * include/std/version (__cpp_lib_to_chars): Add, but comment out.
1468         * testsuite/21_strings/basic_string/numeric_conversions/char/
1469         to_string.cc: Fix reference in comment. Remove unused variable.
1470         * testsuite/21_strings/basic_string/numeric_conversions/char/
1471         to_string_int.cc: New test.
1472
1473 2019-06-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
1474
1475         Fix ConstexprIterator requirements tests - No constexpr algorithms!
1476         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
1477         Replace copy with hand-rolled loop.
1478         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
1479         Ditto.
1480
1481 2019-06-08  Edward Smith-Rowland  <3dw4rd@verizon.net>
1482
1483         Test for C++20 p0858 - ConstexprIterator requirements.
1484         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
1485         New test.
1486         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
1487         New test.
1488
1489 2019-06-07  Thomas Rodgers  <trodgers@redhat.com>
1490
1491         Rename PSTL macro's consistent with libstdc++ (and llvm upstream
1492         project) standards.
1493         * include/bits/c++config: Rename all macros of the form __PSTL* to
1494         _PSTL*.
1495         * include/std/algorithm: Likewise.
1496         * include/std/execution: Likewise.
1497         * include/std/numeric: Likewise.
1498         * include/std/memory: Likewise.
1499         * include/pstl/glue_memory_impl.h: Likewise.
1500         * include/pstl/numeric_impl.h: Likewise.
1501         * include/pstl/glue_memory_defs.h: Likewise.
1502         * include/pstl/execution_defs.h: Likewise.
1503         * include/pstl/utils.h: Likewise.
1504         * include/pstl/algorithm_fwd.h: Likewise.
1505         * include/pstl/unseq_backend_simd.h: Likewise.
1506         * include/pstl/glue_execution_defs.h: Likewise.
1507         * include/pstl/algorithm_impl.h: Likewise.
1508         * include/pstl/parallel_impl.h: Likewise.
1509         * include/pstl/memory_impl.h: Likewise.
1510         * include/pstl/glue_numeric_defs.h: Likewise.
1511         * include/pstl/parallel_backend_utils.h: Likewise.
1512         * include/pstl/glue_algorithm_defs.h: Likewise.
1513         * include/pstl/parallel_backend.h: Likewise.
1514         * include/pstl/glue_numeric_impl.h: Likewise.
1515         * include/pstl/parallel_backend_tbb.h: Likewise.
1516         * include/pstl/numeric_fwd.h: Likewise.
1517         * include/pstl/glue_algorithm_impl.h: Likewise.
1518         * include/pstl/execution_impl.h: Likewise.
1519         * include/pstl/pstl_config.h: Likewise.
1520         * testsuite/util/pstl/pstl_test_config.h: Likewise.
1521         * testsuite/util/pstl/test_utils.h: Likewise.
1522         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
1523         Likewise.
1524         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
1525         Likewise.
1526         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
1527         Likewise.
1528         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: Likewise.
1529         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: Likewise.
1530         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: Likewise.
1531         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: Likewise.
1532         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
1533         Likewise.
1534         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: Likewise.
1535         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: Likewise.
1536         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: Likewise.
1537         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: Likewise.
1538         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
1539         Likewise.
1540         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: Likewise.
1541         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: Likewise.
1542         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: Likewise.
1543         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: Likewise.
1544         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
1545         Likewise.
1546         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: Likewise.
1547         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: Likewise.
1548         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
1549         Likewise.
1550         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
1551         Likewise.
1552         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: Likewise.
1553         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
1554         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
1555         Likewise.
1556         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
1557         Likewise.
1558         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
1559         Likewise.
1560         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
1561         Likewise.
1562         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
1563         Likewise.
1564         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
1565         Likewise.
1566         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
1567         Likewise.
1568         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
1569         Likewise.
1570         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
1571         Likewise.
1572         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
1573         Likewise.
1574         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
1575         Likewise.
1576         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: Likewise.
1577
1578         Rename header guards to be consistent with upstream project's
1579         conventions.
1580         * include/pstl/glue_memory_impl.h: Rename all macros of the form
1581         _PSTL_(.*)_H to _PSTL_\U\1_H.
1582         * include/pstl/numeric_impl.h: Likewise.
1583         * include/pstl/glue_memory_defs.h: Likewise.
1584         * include/pstl/execution_defs.h: Likewise.
1585         * include/pstl/utils.h: Likewise.
1586         * include/pstl/algorithm_fwd.h: Likewise.
1587         * include/pstl/unseq_backend_simd.h: Likewise.
1588         * include/pstl/glue_execution_defs.h: Likewise.
1589         * include/pstl/algorithm_impl.h: Likewise.
1590         * include/pstl/parallel_impl.h: Likewise.
1591         * include/pstl/memory_impl.h: Likewise.
1592         * include/pstl/glue_numeric_defs.h: Likewise.
1593         * include/pstl/parallel_backend_utils.h: Likewise.
1594         * include/pstl/glue_algorithm_defs.h: Likewise.
1595         * include/pstl/parallel_backend.h: Likewise.
1596         * include/pstl/glue_numeric_impl.h: Likewise.
1597         * include/pstl/parallel_backend_tbb.h: Likewise.
1598         * include/pstl/numeric_fwd.h: Likewise.
1599         * include/pstl/glue_algorithm_impl.h: Likewise.
1600         * include/pstl/execution_impl.h: Likewise.
1601         * include/pstl/pstl_config.h: Likewise.
1602         * testsuite/util/pstl/pstl_test_config.h: Likewise.
1603
1604         Synchronize libstdc++ parallel algorithms with upstream
1605         project.
1606         * include/pstl/algorithm_fwd.h: Synchronize with
1607         upstream PSTL project.
1608         * include/pstl/algorithm_impl.h: Likewise.
1609         * include/pstl/execution_defs.h: Likewise.
1610         * include/pstl/execution_impl.h: Likewise.
1611         * include/pstl/glue_algorithm_impl.h: Likewise.
1612         * include/pstl/glue_execution_defs.h: Likewise.
1613         * include/pstl/numeric_fwd.h: Likewise.
1614         * include/pstl/numeric_impl.h: Likewise.
1615         * include/pstl/parallel_backend.h: Likewise.
1616         * include/pstl/pstl_config.h: Likewise.
1617         * include/pstl/unseq_backend_simd.h: Likewise.
1618         * include/pstl/parallel_backend_serial.h: New file.
1619         * include/Makefile.am (pstl_headers): Add
1620         parallel_backend_serial.h.
1621         * include/Makefile.in: Regenerate.
1622
1623         Clean up non-conforming names
1624         * include/pstl/algorithm_impl.h (__parallel_set_union_op):
1625         Uglfiy copy_range1 and copy_range2
1626         (__pattern_walk2_n): Rename local n to __n
1627         * include/pstl/parallel_backend_tbb.h (struct __binary_no_op):
1628         Rename parameter _T to _Tp.
1629
1630         Integrate non-TBB serial backend support
1631         * include/bits/c++config: Adjust TBB detection logic to select serial
1632         PSTL backend if no TBB present.
1633         * testsuite/utils/pstl/test_utils.h: Remove check for
1634         _PSTL_USE_PAR_POLICIES
1635
1636 2019-06-07  Jonathan Wakely  <jwakely@redhat.com>
1637
1638         * testsuite/24_iterators/container_access.cc: Move dg-options before
1639         dg-do directive so the target check uses the -std option.
1640
1641         PR libstdc++/90770
1642         * configure: Regenerate.
1643         * src/Makefile.am (stamp-debug): Also test for missing makefile.
1644         * src/Makefile.in: Regenerate.
1645
1646 2019-06-06  Jonathan Wakely  <jwakely@redhat.com>
1647
1648         * include/std/array: Do not include <stdexcept>.
1649         * include/std/optional: Include <exception> and
1650         <bits/exception_defines.h> instead of <stdexcept>.
1651         * testsuite/20_util/function_objects/searchers.cc: Include <cctype>
1652         for std::isalnum.
1653         * testsuite/20_util/tuple/cons/deduction.cc: Include <memory> for
1654         std::allocator.
1655         * testsuite/23_containers/map/erasure.cc: Include <string>.
1656         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
1657
1658         * testsuite/23_containers/deque/requirements/dr438/assign_neg.cc: Add
1659         dg-prune-output for different C++98 diagnostic.
1660         * testsuite/23_containers/deque/requirements/dr438/constructor_1_neg.cc:
1661         Likewise.
1662         * testsuite/23_containers/deque/requirements/dr438/constructor_2_neg.cc:
1663         Likewise.
1664         * testsuite/23_containers/deque/requirements/dr438/insert_neg.cc:
1665         Likewise.
1666         * testsuite/23_containers/list/requirements/dr438/assign_neg.cc:
1667         Likewise.
1668         * testsuite/23_containers/list/requirements/dr438/constructor_1_neg.cc:
1669         Likewise.
1670         * testsuite/23_containers/list/requirements/dr438/constructor_2_neg.cc:
1671         Likewise.
1672         * testsuite/23_containers/list/requirements/dr438/insert_neg.cc:
1673         Likewise.
1674         * testsuite/23_containers/vector/requirements/dr438/assign_neg.cc:
1675         Likewise.
1676         * testsuite/23_containers/vector/requirements/dr438/
1677         constructor_1_neg.cc: Likewise.
1678         * testsuite/23_containers/vector/requirements/dr438/
1679         constructor_2_neg.cc: Likewise.
1680         * testsuite/23_containers/vector/requirements/dr438/insert_neg.cc:
1681         Likewise.
1682         * testsuite/libstdc++-prettyprinters/compat.cc: Do not run for C++98.
1683
1684         * testsuite/23_containers/unordered_map/requirements/debug_container.cc:
1685         Do not test allocator rebinding extension for C++2a.
1686         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
1687         dg-do directive for C++17 and C++2a.
1688
1689         * testsuite/23_containers/deque/requirements/explicit_instantiation/
1690         1_c++0x.cc: Remove redundant test.
1691         * testsuite/23_containers/deque/requirements/explicit_instantiation/
1692         2.cc: Use target selector instead of preprocessor condition.
1693         * testsuite/23_containers/deque/requirements/explicit_instantiation/
1694         3.cc: Do not run test for C++2a.
1695         * testsuite/23_containers/forward_list/requirements/
1696         explicit_instantiation/3.cc: Likewise.
1697         * testsuite/23_containers/forward_list/requirements/
1698         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1699         for C++2a.
1700         * testsuite/23_containers/list/requirements/explicit_instantiation/
1701         1_c++0x.cc: Remove redundant test.
1702         * testsuite/23_containers/list/requirements/explicit_instantiation/
1703         2.cc: Use target selector instead of preprocessor condition.
1704         * testsuite/23_containers/list/requirements/explicit_instantiation/
1705         3.cc: Do not run test for C++2a.
1706         * testsuite/23_containers/list/requirements/explicit_instantiation/
1707         5.cc: Do not test allocator rebinding extension for C++2a.
1708         * testsuite/23_containers/map/requirements/explicit_instantiation/
1709         1_c++0x.cc: Remove redundant test.
1710         * testsuite/23_containers/map/requirements/explicit_instantiation/
1711         2.cc: Adjust comment.
1712         * testsuite/23_containers/map/requirements/explicit_instantiation/
1713         3.cc: Do not run test for C++2a.
1714         * testsuite/23_containers/map/requirements/explicit_instantiation/
1715         5.cc: Do not test allocator rebinding extension for C++2a.
1716         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
1717         1_c++0x.cc: Remove redundant test.
1718         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
1719         3.cc: Do not run test for C++2a.
1720         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
1721         5.cc: Do not test allocator rebinding extension for C++2a.
1722         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
1723         3.cc: Do not run test for C++2a.
1724         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
1725         5.cc: Do not test allocator rebinding extension for C++2a.
1726         * testsuite/23_containers/set/requirements/explicit_instantiation/3.cc:
1727         Do not run test for C++2a.
1728         * testsuite/23_containers/set/requirements/explicit_instantiation/
1729         1_c++0x.cc: Remove redundant test.
1730         * testsuite/23_containers/set/requirements/explicit_instantiation/5.cc:
1731         Do not test allocator rebinding extension for C++2a.
1732         * testsuite/23_containers/unordered_map/requirements/
1733         explicit_instantiation/3.cc: Likewise.
1734         * testsuite/23_containers/unordered_map/requirements/
1735         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1736         for C++2a.
1737         * testsuite/23_containers/unordered_multimap/requirements/
1738         explicit_instantiation/3.cc: Do not run test for C++2a.
1739         * testsuite/23_containers/unordered_multimap/requirements/
1740         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1741         for C++2a.
1742         * testsuite/23_containers/unordered_multiset/requirements/
1743         explicit_instantiation/3.cc: Do not run test for C++2a.
1744         * testsuite/23_containers/unordered_multiset/requirements/
1745         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1746         for C++2a.
1747         * testsuite/23_containers/unordered_set/requirements/
1748         explicit_instantiation/3.cc: Do not run test for C++2a.
1749         * testsuite/23_containers/unordered_set/requirements/
1750         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1751         for C++2a.
1752         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
1753         2.cc: Remove redundant test.
1754         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
1755         3.cc: Do not run test for C++2a.
1756         * testsuite/23_containers/vector/requirements/explicit_instantiation/
1757         3.cc: Likewise.
1758
1759         * include/std/type_traits (is_empty, is_polymorphic, is_final)
1760         (is_abstract, is_aggregate): Remove static_assert.
1761         * testsuite/20_util/is_abstract/incomplete_neg.cc: Check for error
1762         from builtin only.
1763         * testsuite/20_util/is_aggregate/incomplete_neg.cc: Likewise. Add
1764         missing -std=gnu++17 option.
1765         * testsuite/20_util/is_empty/incomplete_neg.cc: New test.
1766         * testsuite/20_util/is_final/incomplete_neg.cc: New test.
1767         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: Check for error
1768         from builtin only.
1769
1770         * testsuite/18_support/set_terminate.cc: Do not run for C++98 mode.
1771         * testsuite/18_support/set_unexpected.cc: Likewise.
1772         * testsuite/20_util/is_nothrow_invocable/value.cc: Test converting to
1773         void.
1774         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix constexpr
1775         function to be valid in C++11.
1776         * testsuite/26_numerics/complex/proj.cc: Do not run for C++98 mode.
1777         * testsuite/experimental/names.cc: Do not run for C++98 mode. Do not
1778         include Library Fundamentals or Networking headers in C++11 mode.
1779         * testsuite/ext/char8_t/atomic-1.cc: Do not run for C++98 mode.
1780
1781         * include/std/tuple (_TC): Replace with _TupleConstraints.
1782         (_TupleConstraints): New helper for SFINAE constraints, with more
1783         expressive member functions to reduce duplication when used.
1784         (tuple::_TC2, tuple::_TMC, tuple::_TNTC): Remove.
1785         (tuple::_TCC): Replace dummy type parameter with bool non-type
1786         parameter that can be used to check the pack size.
1787         (tuple::_ImplicitDefaultCtor, tuple::_ExplicitDefaultCtor)
1788         (tuple::_ImplicitCtor, tuple::_ExplicitCtor): New alias templates for
1789         checking constraints in constructors.
1790         (tuple::__valid_args, tuple::_UseOtherCtor, tuple::__use_other_ctor):
1791         New SFINAE helpers.
1792         (tuple::tuple): Use new helpers to reduce repitition in constraints.
1793         (tuple::tuple(allocator_arg_t, const Alloc&)): Constrain.
1794         (tuple<T1, T2>::_TCC, tuple<T1, T2>::_ImplicitDefaultCtor)
1795         (tuple<T1, T2>::_ExplicitDefaultCtor, tuple<T1, T2>::_ImplicitCtor)
1796         (tuple<T1, T2>::_ExplicitCtor): New alias templates for checking
1797         constraints in constructors.
1798         (tuple::__is_alloc_arg()): New SFINAE helpers.
1799         (tuple<T1, T2>::tuple): Use new helpers to reduce repitition in
1800         constraints.
1801         (tuple<T1, T2>::tuple(allocator_arg_t, const Alloc&)): Constrain.
1802         * testsuite/20_util/tuple/cons/90700.cc: New test.
1803         * testsuite/20_util/tuple/cons/allocators.cc: Add default constructor
1804         to meet new constraint on allocator-extended default constructor.
1805
1806 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
1807
1808         * include/bits/stl_map.h (map): Disable static assert for C++98 mode.
1809         * include/bits/stl_multimap.h (multimap): Likewise.
1810
1811 2019-06-03  François Dumont  <fdumont@gcc.gnu.org>
1812
1813         Rename variables and cleanup comments.
1814         * include/bits/hashtable_policy.h
1815         * include/bits/hashtable.h
1816
1817 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
1818
1819         * doc/xml/manual/status_cxx2020.xml: Add missing row for P0920R2.
1820         Fix bgcolor for P0340R3.
1821         * doc/html/*: Regenerate.
1822
1823         PR libstdc++/90686
1824         * doc/xml/manual/status_cxx2014.xml: Document what's missing from
1825         <experimental/memory_resource>.
1826         * doc/xml/manual/status_cxx2020.xml: Document status of P1285R0,
1827         P0339R6, P0340R3, P1164R1 and P1357R1.
1828         * doc/html/*: Regenerate.
1829
1830         * doc/xml/manual/status_cxx2020.xml: Document P1463R1 status.
1831         * include/bits/forward_list.h [__cplusplus > 201703]: Enable
1832         allocator::value_type assertion for C++2a.
1833         * include/bits/hashtable.h: Likewise.
1834         * include/bits/stl_deque.h: Likewise.
1835         * include/bits/stl_list.h: Likewise.
1836         * include/bits/stl_map.h: Likewise.
1837         * include/bits/stl_multimap.h: Likewise.
1838         * include/bits/stl_multiset.h: Likewise.
1839         * include/bits/stl_set.h: Likewise.
1840         * include/bits/stl_vector.h: Likewise.
1841         * testsuite/23_containers/deque/48101-3_neg.cc: New test.
1842         * testsuite/23_containers/forward_list/48101-3_neg.cc: New test.
1843         * testsuite/23_containers/list/48101-3_neg.cc: New test.
1844         * testsuite/23_containers/map/48101-3_neg.cc: New test.
1845         * testsuite/23_containers/multimap/48101-3_neg.cc: New test.
1846         * testsuite/23_containers/multiset/48101-3_neg.cc: New test.
1847         * testsuite/23_containers/set/48101-3_neg.cc: New test.
1848         * testsuite/23_containers/unordered_map/48101-3_neg.cc: New test.
1849         * testsuite/23_containers/unordered_multimap/48101-3_neg.cc: New test.
1850         * testsuite/23_containers/unordered_multiset/48101-3_neg.cc: New test.
1851         * testsuite/23_containers/unordered_set/48101-3_neg.cc: New test.
1852         * testsuite/23_containers/vector/48101-3_neg.cc: New test.
1853
1854 2019-05-31  Gerald Pfeifer  <gerald@pfeifer.com>
1855
1856         * doc/xml/manual/allocator.xml: Move hoard.org back to http.
1857
1858 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
1859
1860         * include/std/tuple (tuple<>): Add noexcept to allocator-extended
1861         constructors.
1862         (tuple<T1, T2>::__nothrow_default_constructible()): New helper
1863         function.
1864         (tuple<T1, T2>::tuple(), explicit tuple<T1, T2>::tuple()): Use helper.
1865
1866 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
1867
1868         * src/c++98/bitmap_allocator.cc: Add using-declaration for size_t.
1869
1870         PR libstdc++/90682
1871         * libsupc++/eh_term_handler.cc: Include eh_term_handler.h to get
1872         definition of _GLIBCXX_DEFAULT_TERM_HANDLER.
1873         * libsupc++/eh_term_handler.h: New header defining
1874         _GLIBCXX_DEFAULT_TERM_HANDLER.
1875         * libsupc++/eh_terminate.cc: Include eh_term_handler.h.
1876         (set_terminate): Restore default handler when argument is null.
1877         (set_unexpected): Likewise.
1878         * testsuite/18_support/set_terminate.cc: New test.
1879         * testsuite/18_support/set_unexpected.cc: New test.
1880
1881         * include/backward/hashtable.h (size_t, ptrdiff_t)
1882         (forward_iterator_tag, input_iterator_tag, _Construct, _Destroy)
1883         (distance, vector, pair, __iterator_category): Remove
1884         using-declarations that add these names to namespace __gnu_cxx.
1885         * include/ext/bitmap_allocator.h (size_t, ptrdiff_t): Likewise.
1886         * include/ext/debug_allocator.h (size_t): Likewise.
1887         * include/ext/functional (size_t, unary_function, binary_function)
1888         (mem_fun1_t, const_mem_fun1_t, mem_fun1_ref_t, const_mem_fun1_ref_t):
1889         Likewise.
1890         * include/ext/malloc_allocator.h (size_t, ptrdiff_t): Likewise.
1891         * include/ext/memory (ptrdiff_t, pair, __iterator_category): Likewise.
1892         * include/ext/mt_allocator.h (size_t, ptrdiff_t): Likewise.
1893         * include/ext/new_allocator.h (size_t, ptrdiff_t): Likewise.
1894         * include/ext/numeric (iota): Fix outdated comment.
1895         * include/ext/pool_allocator.h (size_t, ptrdiff_t): Likewise.
1896         * include/ext/rb_tree (_Rb_tree, allocator): Likewise.
1897         * include/ext/rope (size_t, ptrdiff_t, allocator, _Destroy): Likewise.
1898         * include/ext/ropeimpl.h (size_t, printf, basic_ostream)
1899         (__throw_length_error, _Destroy, std::__uninitialized_fill_n_a):
1900         Likewise.
1901         * include/ext/slist (size_t, ptrdiff_t, _Construct, _Destroy)
1902         (allocator, __true_type, __false_type): Likewise.
1903
1904 2019-05-31  Antony Polukhin  <antoshkka@gmail.com>
1905
1906         PR libstdc++/71579
1907         * include/std/type_traits __type_identity, __is_complete_or_unbounded):
1908         New helpers for checking preconditions in traits.
1909         (is_trivial, is_trivially_copyable, is_standard_layout, is_pod)
1910         (is_literal_type, is_empty, is_polymorphic, is_final, is_abstract)
1911         (is_destructible, is_nothrow_destructible, is_constructible)
1912         (is_default_constructible, is_copy_constructible)
1913         (is_move_constructible, is_nothrow_default_constructible)
1914         (is_nothrow_constructible, is_nothrow_copy_constructible)
1915         (is_nothrow_move_constructible, is_copy_assignable, is_move_assignable)
1916         (is_nothrow_assignable, is_nothrow_copy_assignable)
1917         (is_nothrow_move_assignable, is_trivially_constructible)
1918         (is_trivially_copy_constructible, is_trivially_move_constructible)
1919         is_trivially_assignable, is_trivially_copy_assignable)
1920         (is_trivially_move_assignable, is_trivially_destructible)
1921         (alignment_of, is_swappable, is_nothrow_swappable, is_invocable)
1922         (is_invocable_r, is_nothrow_invocable)
1923         (has_unique_object_representations, is_aggregate): Add static_asserts
1924         to make sure that type traits are not misused with incomplete types.
1925         (__is_constructible_impl, __is_nothrow_default_constructible_impl)
1926         (__is_nothrow_constructible_impl, __is_nothrow_assignable_impl): New
1927         base characteristics without assertions that can be reused in other
1928         traits.
1929         * testsuite/20_util/is_complete_or_unbounded/memoization.cc: New test.
1930         * testsuite/20_util/is_complete_or_unbounded/memoization_neg.cc: New
1931         test.
1932         * testsuite/20_util/is_complete_or_unbounded/value.cc: New test.
1933         * testsuite/20_util/is_abstract/incomplete_neg.cc: New test.
1934         * testsuite/20_util/is_aggregate/incomplete_neg.cc: New test.
1935         * testsuite/20_util/is_class/value.cc: Check incomplete type.
1936         * testsuite/20_util/is_function/value.cc: Likewise.
1937         * testsuite/20_util/is_move_constructible/incomplete_neg.cc: New test.
1938         * testsuite/20_util/is_nothrow_move_assignable/incomplete_neg.cc: New
1939         test.
1940         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: New test.
1941         * testsuite/20_util/is_reference/value.cc: Check incomplete types.
1942         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
1943         * testsuite/20_util/is_union/value.cc: Likewise.
1944         * testsuite/20_util/is_void/value.cc: Likewise.
1945         * testsuite/util/testsuite_tr1.h: Add incomplete union type.
1946
1947 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
1948
1949         * include/bits/random.h (random_device::_M_init(const char*, size_t)):
1950         Add new private member function.
1951         * src/c++11/cow-string-inst.cc (random_device::_M_init(const string&))
1952         (random_device::_M_init_pretr1(const string&)): Call new private
1953         member with string data.
1954         * src/c++11/random.cc (random_device::_M_init(const char*, size_t)):
1955         Define.
1956         * testsuite/26_numerics/random/random_device/cons/default-cow.cc: New
1957         test using COW strings.
1958         * testsuite/26_numerics/random/random_device/cons/default.cc: Generate
1959         a value from the device.
1960         * testsuite/26_numerics/random/random_device/cons/token.cc: Likewise.
1961         Fix typo in token string.
1962
1963 2019-05-30  Nina Dinka Ranns  <dinka.ranns@gmail.com>
1964
1965         LWG2788 basic_string spurious use of a default constructible allocator
1966         * include/bits/basic_string.tcc [_GLIBCXX_USE_CXX11_ABI]
1967         (basic_string::_M_replace_dispatch): Construct temporary string with
1968         the current allocator.
1969         * testsuite/21_strings/basic_string/allocator/char/lwg2788.cc: New.
1970         * testsuite/21_strings/basic_string/allocator/wchar_t/lwg2788.cc: New.
1971
1972 2019-05-30  Jonathan Wakely  <jwakely@redhat.com>
1973
1974         * doc/xml/manual/diagnostics.xml: Update list of headers that define
1975         exception classes.
1976         * doc/xml/manual/support.xml: Rewrite advice around NULL. Rewrite
1977         section about new/delete overloads. Improve section on verbose
1978         terminate handler.
1979         * doc/html/*: Regenerate.
1980
1981         * doc/xml/manual/status_cxx2020.xml: Add feature-test macro for
1982         P0811R3. Change status of P1353R0.
1983         * doc/html/*: Regenerate.
1984
1985         * doc/xml/manual/status_cxx2011.xml: Use <variablelist> for
1986         documentation of implementation-defined types for [thread.req.native].
1987         * doc/xml/manual/status_cxx2017.xml: Update documentation of
1988         implementation-defined strings for [variant.bad.access]. Fix typo in
1989         documentation of implementation-defined support for [fs.conform.9945].
1990         * doc/html/*: Regenerate.
1991
1992 2019-05-29  Jonathan Wakely  <jwakely@redhat.com>
1993
1994         PR libstdc++/85494
1995         * testsuite/26_numerics/random/random_device/cons/token.cc: Fix test
1996         that fails on mingw-w64.
1997
1998         PR libstdc++/88881
1999         * src/c++17/fs_ops.cc [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
2000         (status(const path&, error_code&)): Use parent_path() to remove
2001         trailing slash.
2002         (symlink_status(const path&, error_code&)): Duplicate workaround for
2003         bug in _wstat for paths with trailing slash.
2004         * testsuite/27_io/filesystem/operations/remove_all.cc: Check path
2005         with trailing slash.
2006         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
2007         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
2008
2009         * src/c++17/fs_path.cc (path::parent_path()): Create whole path at
2010         once instead of building it iteratively.
2011
2012         * testsuite/util/testsuite_api.h: Remove names of unused parameters.
2013
2014         PR libstdc++/85494 use rdseed and rand_s in std::random_device
2015         * acinclude.m4 (GLIBCXX_CHECK_X86_RDSEED): Define macro to check if
2016         the assembler supports rdseed.
2017         * config.h.in: Regenerate.
2018         * configure: Regenerate.
2019         * configure.ac: Use GLIBCXX_CHECK_X86_RDSEED.
2020         * config/os/mingw32-w64/os_defines.h (_GLIBCXX_USE_CRT_RAND_S): Define.
2021         * doc/html/*: Regenerate.
2022         * doc/xml/manual/status_cxx2011.xml: Document new tokens.
2023         * include/bits/random.h (random_device::random_device()): Always call
2024         _M_init rather than _M_init_pretr1.
2025         (random_device::random_device(const string&)): Likewise.
2026         (random_device::operator()()): Always call _M_getval().
2027         (random_device::_M_file): Replace first member of union with an
2028         anonymous struct, with _M_file as its first member.
2029         * src/c++11/random.cc [_GLIBCXX_X86_RDRAND] (USE_RDRAND): Define.
2030         [_GLIBCXX_X86_RDSEED] (USE_RDSEED): Define.
2031         (USE_MT19937): Define if none of the above are defined.
2032         (USE_POSIX_FILE_IO): Define.
2033         (_M_strtoul): Remove.
2034         [USE_RDSEED] (__x86_rdseed): Define new function.
2035         [_GLIBCXX_USE_CRT_RAND_S] (__winxp_rand_s): Define new function.
2036         (random_device::_M_init(const string&)): Initialize new union members.
2037         Add support for "rdseed" and "rand_s" tokens. Decide what the
2038         "default" token does according to which USE_* macros are defined.
2039         [USE_POSIX_FILE_IO]: Store a file descriptor.
2040         [USE_MT19937]: Forward to _M_init_pretr1 instead.
2041         (random_device::_M_init_pretr1(const string&)) [USE_MT19937]: Inline
2042         code from _M_strtoul.
2043         [!USE_MT19937]: Call _M_init, transforming the old default token or
2044         numeric tokens to "default".
2045         (random_device::_M_fini()) [USE_POSIX_FILE_IO]: Use close not fclose.
2046         (random_device::_M_getval()): Use new union members to obtain a
2047         random number from the stored function pointer or file descriptor.
2048         [USE_MT19937]: Obtain a value from the mt19937 engine.
2049         (random_device::_M_getval_pretr1()): Call _M_getval().
2050         (random_device::_M_getentropy()) [USE_POSIX_FILE_IO]: Use _M_fd
2051         instead of fileno.
2052         [!USE_MT19937] (mersenne_twister): Do not instantiate when not needed.
2053         * testsuite/26_numerics/random/random_device/85494.cc: New test.
2054
2055 2019-05-28  Jonathan Wakely  <jwakely@redhat.com>
2056
2057         PR libstdc++/90634
2058         * include/experimental/bits/fs_path.h (path::path(path&&)): Only call
2059         _M_split_cmpts() for a path with multiple components.
2060         (path::_S_is_dir_sep()): Add missing 'static' keyword to function.
2061         * src/filesystem/path.cc (path::_M_split_cmpts()): Count number of
2062         components and reserve space in vector. Return early when there is
2063         only one component.
2064         * testsuite/27_io/filesystem/path/construct/90634.cc: New test.
2065         * testsuite/experimental/filesystem/path/construct/90634.cc: New test.
2066
2067         * testsuite/util/testsuite_fs.h (compare_paths): Use three-argument
2068         form of std::equals for C++11 compatibility.
2069
2070 2019-05-26  Gerald Pfeifer  <gerald@pfeifer.com>
2071
2072         * doc/xml/manual/appendix_contributing.xml: Update pointer to
2073         C++ standard at ansi.org.
2074
2075 2019-05-24  Jonathan Wakely  <jwakely@redhat.com>
2076
2077         * include/std/numeric (midpoint(T*, T*)): Fix incorrect result.
2078         * testsuite/26_numerics/midpoint/pointer.cc: Change "compile" test
2079         to "run".
2080
2081         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: Fix test.
2082         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused function.
2083
2084 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
2085
2086         * testsuite/20_util/function_objects/invoke/1.cc: Move C++17-specific
2087         tests to ...
2088         * testsuite/20_util/function_objects/invoke/3.cc: New test.
2089         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
2090         "compile" test to "run".
2091
2092         * doc/xml/manual/intro.xml: Document LWG DR 2996 change.
2093         * doc/html/*: Regenerate.
2094         * include/bits/shared_ptr.h (shared_ptr(shared_ptr&&, T*)): Add
2095         rvalue aliasing constructor.
2096         (static_pointer_cast, const_pointer, dynamic_pointer_cast)
2097         (reinterpret_pointer_cast): Add overloads taking rvalues.
2098         * include/bits/shared_ptr_base.h (__shared_ptr(__shared_ptr&&, T*)):
2099         Add rvalue aliasing constructor.
2100         * testsuite/20_util/shared_ptr/casts/1.cc: Change "compile" test to
2101         "run" and check return values as well as types.
2102         * testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
2103         * testsuite/20_util/shared_ptr/casts/rval.cc: New test.
2104         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: New test.
2105         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused return
2106         values.
2107
2108         * doc/xml/manual/evolution.xml: Document LWG DR 2921 change.
2109         * doc/xml/manual/intro.xml: Likewise.
2110         * include/std/future (__create_task_state): Add default arguments
2111         to make providing an allocator optional.
2112         (packaged_task::packaged_task(F&&)): Call __create_task_state directly
2113         instead of delegating to another constructor.
2114         (packaged_task::packaged_task(allocator_arg_t, const A&, ...)): Do not
2115         define allocator-extended constructors for C++17 and later.
2116         * testsuite/30_threads/packaged_task/cons/alloc.cc: Only run test for
2117         C++11 and C++14.
2118         * testsuite/30_threads/packaged_task/cons/alloc2.cc: Likewise.
2119         * testsuite/30_threads/packaged_task/cons/alloc_min.cc: Likewise.
2120         * testsuite/30_threads/packaged_task/uses_allocator.cc: Likewise.
2121
2122 2019-05-23  Hans-Peter Nilsson  <hp@axis.com>
2123
2124         * testsuite/26_numerics/random/poisson_distribution/operators/values.cc:
2125         Don't run the libstdc++/83237 part on simulator targets.
2126
2127 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
2128
2129         * doc/xml/manual/status_cxx2017.xml: Add feature test macro for
2130         P0040R3.
2131         * doc/html/*: Regenerate.
2132
2133         * include/experimental/any (__any_caster): Use RTTI if comparing
2134         addresses fails, to support non-unique addresses in shared libraries.
2135         * include/std/any (__any_caster): Likewise.
2136
2137         PR libstdc++/90220
2138         * include/experimental/any (__any_caster): Constrain to only be
2139         callable for object types. Use remove_cv_t instead of decay_t.
2140         If the type decays or isn't copy constructible, compare the manager
2141         function to a dummy specialization.
2142         (__any_caster): Add overload constrained for non-object types.
2143         (any::_Manager_internal<_Op>): Add dummy specialization.
2144         * testsuite/experimental/any/misc/any_cast.cc: Test function types
2145         and array types.
2146
2147 2019-05-22  Jonathan Wakely  <jwakely@redhat.com>
2148
2149         PR libstdc++/90557
2150         * src/c++17/fs_path.cc (path::_List::operator=(const _List&)): Fix
2151         reversed arguments to uninitialized_copy_n.
2152         * testsuite/27_io/filesystem/path/assign/copy.cc: Check that source
2153         is unchanged by copy assignment.
2154         * testsuite/util/testsuite_fs.h (compare_paths): Use std::equal to
2155         compare path components.
2156
2157         PR libstdc++/77691
2158         * include/experimental/memory_resource: Add system header pragma and
2159         do not define anything unless compiled as C++14 or later.
2160         (__resource_adaptor_common::__guaranteed_alignment): Remove.
2161         (__resource_adaptor_imp::do_allocate): If the requested alignment
2162         is a fundamental alignment then either allocate directly from _M_alloc
2163         or call the new _M_allocate function.
2164         (__resource_adaptor_imp::do_deallocate): Likewise for deallocation.
2165         (__resource_adaptor_imp::_M_allocate): New function that uses a copy
2166         of the allocator rebound to a POD type with the specified alignment.
2167         (__resource_adaptor_imp::_M_deallocate): Likewise for deallocation.
2168         * testsuite/experimental/memory_resource/new_delete_resource.cc:
2169         Adjust expected allocation sizes.
2170         * testsuite/experimental/memory_resource/resource_adaptor.cc: Remove
2171         xfail for Solaris x86.
2172
2173 2019-05-21  Thomas Rodgers  <trodgers@redhat.com>
2174
2175         LWG 3062 - Unnecessary decay_t in is_execution_policy_v
2176         * include/pstl/execution_defs.h (__enable_if_execution_policy):
2177         Use std::__remove_cvref_t when building with GCC.
2178
2179 2019-05-21  Jonathan Wakely  <jwakely@redhat.com>
2180
2181         PR libstdc++/90252
2182         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
2183         Use "additional_flags" to pass -ltbb to v3_target_compile command.
2184         Use check_v3_target_prop_cached to cache the result of the test.
2185
2186         * doc/xml/manual/shared_ptr.xml: Fix names of lock policy constants.
2187
2188 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
2189
2190         PR libstdc++/90252
2191         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
2192         Changed v3_target_compile check from preprocess to executable.
2193         Added "-ltbb" to v3_target_compile flags.
2194
2195 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
2196
2197         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
2198         Add check for Thread Building Blocks 2018 or later.
2199
2200 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
2201
2202         * testsuite/experimental/names.cc: Only include Networking TS headers
2203         on targets with the necessary Gthreads support.
2204
2205 2019-05-20  Marek Polacek  <polacek@redhat.com>
2206
2207         CWG 2094 - volatile scalars are trivially copyable.
2208         PR c++/85679
2209         * testsuite/20_util/is_trivially_copyable/value.cc: Change the expected
2210         result for volatile int.
2211
2212 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
2213
2214         * testsuite/17_intro/names.cc: Do not check 'ptr' on Solaris.
2215         * testsuite/experimental/names.cc: Include <experimental/filesystem>
2216         conditionally.
2217
2218         PR c++/90532 Ensure __is_constructible(T[]) is false
2219         * include/std/type_traits (__do_is_default_constructible_impl)
2220         (__is_default_constructible_atom, __is_default_constructible_safe):
2221         Remove.
2222         (is_default_constructible): Use is_constructible.
2223         * testsuite/20_util/is_constructible/value.cc: Check int[] case.
2224         * testsuite/20_util/is_default_constructible/value.cc: Likewise.
2225         * testsuite/20_util/is_trivially_constructible/value.cc: Likewise.
2226         * testsuite/20_util/is_trivially_default_constructible/value.cc:
2227         Likewise.
2228
2229 2019-05-20  Pádraig Brady  <pbrady@fb.com>
2230
2231         * libstdc++-v3/include/ext/new_allocator.h (deallocate): Pass the size
2232         to the deallocator with -fsized-deallocation.
2233
2234 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
2235
2236         * testsuite/experimental/memory_resource/new_delete_resource.cc: Fix
2237         test by passing correct alignment to deallocate function.
2238
2239 2019-05-18  Jonathan Wakely  <jwakely@redhat.com>
2240
2241         PR libstdc++/90520
2242         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
2243         Raise exception if unique_ptr tuple member has unknown structure.
2244         * python/libstdcxx/v6/xmethods.py (UniquePtrGetWorker.__call__):
2245         Adjust worker to support new __uniq_ptr_data base class. Do not
2246         assume field called _M_head_impl is the first tuple element.
2247
2248 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
2249
2250         * include/bits/stl_deque.h
2251         (_Deque_iterator<>::__ptr_to): Remove, use std::__ptr_rebind.
2252         (_Deque_base(_Deque_base&&, const allocator_type&)): New.
2253         (_Deque_base::_Deque_impl_data): New.
2254         (_Deque_base::_Deque_impl): Inherit latter.
2255         (_Deque_base::_Deque_impl::_M_swap_data): Move...
2256         (_Deque_base::_Deque_impl_data::_M_swap_data): ... here.
2257         (_Deque_base::_Deque_impl()): Add noexcept qualification.
2258         (_Deque_base::_Deque_impl(_Deque_impl&&, _Tp_alloc_type&&)): New.
2259         (_Deque_base::_Deque_impl::_M_get_Tp_allocator()): Remove static_cast.
2260         (deque<>::deque()): Default.
2261         (deque<>::deque(deque&&)): Default.
2262         (deque<>::deque(deque&&, const allocator_type&, false_type)): New.
2263         (deque<>::deque(deque&&, const allocator_type&, true_type)): New.
2264         (deque<>::deque(deque&&, const allocator_type&)): Delegate to latters.
2265         (deque<>::deque<_It>(_It, _It, const allocator_type&)): Use
2266         _M_range_initialize.
2267         (deque<>::assign<_It>(_It, _It)): Use _M_assign_aux.
2268         (deque<>::resize(size_type, const value_type&)): Share a single
2269         implementation.
2270         (deque<>::insert<_It>(const_iterator, _It, _It)): Use
2271         _M_range_insert_aux.
2272         [__cplusplus >= 201103L](_M_initialize_dispatch): Remove.
2273         [__cplusplus >= 201103L](_M_assign_dispatch): Remove.
2274         [__cplusplus >= 201103L](_M_insert_dispatch): Remove.
2275         * testsuite/23_containers/deque/allocator/default_init.cc: New.
2276
2277 2019-05-17  Jonathan Wakely  <jwakely@redhat.com>
2278
2279         PR libstdc++/90246
2280         * include/std/variant (holds_alternative, get, get_if): Improve
2281         static assertion messages.
2282         (bad_variant_access::bad_variant_access()): Change default message.
2283         (__throw_bad_variant_access(bool)): New overload.
2284         (get): Use new overload.
2285         (visit, visit<R>): Improve exception message.
2286
2287         * testsuite/20_util/variant/compile.cc: Fix narrowing test for ILP32
2288         targets. Add more cases from P0608R3.
2289         * testsuite/20_util/variant/run.cc: Add more cases from P0608R3.
2290
2291         * include/bits/random.h (seed_seq::param): Fix non-reserved name.
2292         * include/experimental/type_traits (is_detected_exact)
2293         (is_detected_exact_v): Likewise.
2294         * include/pstl/execution_defs.h (is_execution_policy)
2295         (is_execution_policy_v, __enable_if_execution_policy): Likewise.
2296         * include/pstl/execution_impl.h (__policy_traits): Likewise.
2297         * testsuite/17_intro/names.cc: Check for more non-reserved names.
2298         * testsuite/experimental/names.cc: New test.
2299
2300         PR libstdc++/85965
2301         * include/bits/hashtable.h (_Hashtable::~_Hashtable()): Remove static
2302         assertions from the destructor.
2303         * include/bits/hashtable_policy.h (_Hash_code_base::_M_hash_code):
2304         Move static_assert for hash function to here.
2305         (_Hash_table_base::_M_equals): Move static_assert for equality
2306         predicate to here.
2307         * include/bits/stl_tree.h (_Rb_tree::_S_value(_Const_Link_type)):
2308         Remove.
2309         (_Rb_tree::_S_key(_Const_Link_type)): Move assertions here. Access
2310         the value directly instead of calling _S_value.
2311         (_Rb_tree::_S_value(_Const_Base_ptr)): Remove.
2312         (_Rb_tree::_S_key(_Const_Base_ptr)): Do downcast and forward to
2313         _S_key(_Const_Link_type).
2314         * testsuite/23_containers/set/85965.cc: Check construction,
2315         destruction, assignment and size() do not trigger the assertions.
2316         * testsuite/23_containers/unordered_set/85965.cc: Likewise.
2317         * testsuite/23_containers/map/48101_neg.cc: Call find and adjust
2318         expected errors.
2319         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
2320         * testsuite/23_containers/multiset/48101_neg.cc: Likewise.
2321         * testsuite/23_containers/set/48101_neg.cc: Likewise.
2322         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
2323         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
2324         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
2325         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
2326
2327         * include/bits/invoke.h [__cplusplus < 201703L] (__invoke_r<void>):
2328         Use _GLIBCXX14_CONSTEXPR because void functions cannot be constexpr
2329         in C++11.
2330
2331         * doc/xml/manual/status_cxx2020.xml: Update P0608R3, P0777R1, and
2332         P1165R1 entries.
2333         * doc/html/*: Regenerate.
2334         * include/std/tuple (make_from_tuple): Use remove_reference_t instead
2335         of decay_t (P0777R1).
2336
2337 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
2338
2339         Move from state of allocators (LWG2593)
2340         * include/bits/stl_deque.h
2341         (_Deque_base(_Deque_base&&, false_type)): Remove.
2342         (_Deque_base(_Deque_base&&, true_type)): Remove.
2343         (_Deque_base(_Deque_base&&)): Adapt.
2344         (_Deque_base::_M_move_impl()): Remove.
2345         * testsuite/util/testsuite_allocator.h
2346         (propagating_allocator(propagating_allocator&&)): Preserve move from
2347         state.
2348         * testsuite/23_containers/deque/allocator/move_assign.cc (test02):
2349         Adapt.
2350         * testsuite/23_containers/forward_list/allocator/move_assign.cc (test02):
2351         Adapt.
2352         * testsuite/23_containers/list/allocator/move_assign.cc (test02): Adapt.
2353         * testsuite/23_containers/map/allocator/move_assign.cc (test02): Adapt.
2354         * testsuite/23_containers/multimap/allocator/move_assign.cc (test02):
2355         Adapt.
2356         * testsuite/23_containers/multiset/allocator/move_assign.cc (test02):
2357         Adapt.
2358         * testsuite/23_containers/set/allocator/move_assign.cc (test02): Adapt.
2359         * testsuite/23_containers/unordered_map/allocator/move_assign.cc
2360         (test02): Adapt.
2361         * testsuite/23_containers/unordered_multimap/allocator/move_assign.cc
2362         (test02): Adapt.
2363         * testsuite/23_containers/unordered_multiset/allocator/move_assign.cc
2364         (test02): Adapt.
2365         * testsuite/23_containers/unordered_set/allocator/move_assign.cc
2366         (test02): Adapt.
2367         * testsuite/23_containers/vector/allocator/move_assign.cc (test02):
2368         Adapt.
2369         * testsuite/23_containers/vector/bool/allocator/move_assign.cc (test02):
2370         Adapt.
2371         * testsuite/21_strings/basic_string/allocator/char/move_assign.cc
2372         (test02): Adapt.
2373         * testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc
2374         (test02): Adapt.
2375
2376 2019-05-16  Jonathan Wakely  <jwakely@redhat.com>
2377
2378         * src/c++17/fs_ops.cc (absolute(const path&, error_code&))
2379         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Remove bogus assertion.
2380
2381         * include/std/variant (__overload_set): Remove.
2382         (_Arr): New helper.
2383         (_Build_FUN): New class template to define a single FUN overload,
2384         with specializations to prevent unwanted conversions, as per P0608R3.
2385         (_Build_FUNs): New class template to build an overload set of FUN.
2386         (_FUN_type): New alias template to perform overload resolution.
2387         (__accepted_type): Use integer_constant base for failure case. Use
2388         _FUN_type for successful case.
2389         (variant::__accepted_index): Use _Tp instead of _Tp&&.
2390         (variant::variant(_Tp&&)): Likewise.
2391         (variant::operator=(_Tp&&)): Likewise.
2392
2393         * include/std/variant (_Variant_storage<false, _Types...>::_M_reset):
2394         Replace raw visitation with a runtime check for the valueless state
2395         and a non-raw visitor.
2396         (_Variant_storage<false, _Types...>::_M_reset_impl): Remove.
2397         (variant::index()): Remove branch.
2398         (variant::swap(variant&)): Use valueless_by_exception() instead of
2399         comparing the index to variant_npos, and add likelihood attribute.
2400
2401         * include/bits/hashtable_policy.h (_Equal_helper): Remove.
2402         (_Hashtable_base::_Equal_hash_code): Define new class template.
2403         (_Hashtable_base::_M_equals): Use _Equal_hash_code instead of
2404         _Equal_helper.
2405
2406         * include/bits/hashtable_policy.h (_Hashtable_ebo_helper::_S_get):
2407         Replace with _M_get non-static member function.
2408         (_Hashtable_ebo_helper::_S_cget): Replace with _M_cget non-static
2409         member function.
2410         (_Hash_code_base, _Local_iterator_base, _Hashtable_base):
2411         (_Hashtable_alloc): Adjust to use non-static members of EBO helper.
2412
2413         * include/bits/hashtable_policy.h (_Hash_code_base::_M_swap): Use
2414         _S_get accessors for members in EBO helpers.
2415         (_Hash_code_base::_M_extract(), _Hash_code_base::_M_ranged_hash())
2416         (_Hash_code_base::_M_h1(), _Hash_code_base::_M_h2()): Remove non-const
2417         overloads.
2418         (_Hashtable_base::_M_swap): Use _S_get accessors for members in EBO
2419         helpers.
2420         (_Hashtable_base::_M_eq()): Remove non-const overload.
2421
2422 2019-05-15  Jonathan Wakely  <jwakely@redhat.com>
2423
2424         * include/std/variant (visit, visit<R>): Qualify calls to __do_visit.
2425
2426 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
2427
2428         * testsuite/util/testsuite_allocator.h (NullablePointer::operator bool):
2429         Fix return value.
2430
2431 2019-05-14  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
2432
2433         * config/os/solaris/solaris2.10: Move to ...
2434         * config/os/solaris: ... this.
2435         * configure.host (os_include_dir): Adapt.
2436         (abi_baseline_pair): Remove Solaris 10 handling.
2437         * config/abi/post/i386-solaris2.10: Remove.
2438         * config/abi/post/sparc-solaris2.10: Remove.
2439         * config/abi/post/i386-solaris2.11: Rename to ...
2440         * config/abi/post/i386-solaris: ... this.
2441         * config/abi/post/sparc-solaris2.11: Rename to ...
2442         * config/abi/post/sparc-solaris: ... this.
2443
2444         * libsupc++/new_opa.cc [_GLIBCXX_HAVE_MEMALIGN] [__sun]: Remove
2445         workaround.
2446
2447         * testsuite/ext/enc_filebuf/char/13598.cc: Remove *-*-solaris2.10
2448         xfail.
2449
2450 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
2451
2452         * include/std/variant (__visit_with_index): Remove typedef.
2453         (__deduce_visit_result): New tag type.
2454         (__raw_visit, __raw_idx_visit): New helper functions for "raw"
2455         visitation of possibly-valueless variants, forwarding to __do_visit
2456         with the relevant tag type.
2457         (_Variant_storage<false, _Types...>::_M_reset_impl): Use __raw_visit
2458         and make lambda return void.
2459         (__variant_construct): Likewise.
2460         (_Copy_assign_base::operator=, _Move_assign_base::operator=): Use
2461         __raw_idx_visit and make lambda return void.
2462         (_Multi_array::__untag_result): Add metafunction to check the function
2463         pointer type for a tag type that dictates the kind of visitation.
2464         (_Multi_array<_Ret(*)(_Visitor, _Variants...), __first, __rest...>):
2465         Use decltype(auto) instead of tagged function pointer type.
2466         (__gen_vtable_impl): Remove bool non-type parameter and unused
2467         _Variant_tuple parameter.
2468         (__gen_vtable_impl::__visit_invoke_impl): Remove.
2469         (__gen_vtable_impl::__do_visit_invoke): Remove.
2470         (__gen_vtable_impl::__do_visit_invoke_r): Remove.
2471         (__gen_vtable_impl::__visit_invoke): Use if-constexpr and __invoke_r
2472         for the visit<R> case, rather than dispatching to separate functions.
2473         (_VARIANT_RELATION_FUNCTION_TEMPLATE): Use __raw_idx_visit and make
2474         lambda return void.
2475         (variant::swap): Likewise.
2476         (__do_visit): Replace two non-type template parameters with a single
2477         type parameter, so that the caller must specify the visitor's return
2478         type (or one of the tag types).
2479         (visit): Deduce a return type from the visitor and use the
2480         __deduce_visit_result tag to enforce that all overloads return the
2481         same type.
2482         (visit<R>): Call __do_visit<R> with explicit result type.
2483         (__variant_hash_call_base_impl::operator()): Use __raw_visit and make
2484         lambda return void.
2485
2486 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2487
2488         nonesuch is insufficiently useless (lwg2996)
2489         * include/std/type_traits (struct __nonesuch): Added private base
2490         class to make __nonesuch not an aggregate and removed deleted default
2491         constructor.
2492         * include/bits/stl_pair.h (struct __nonesuch_no_braces): Removed.
2493         (operator=(const pair&)): Use __nonesuch instead of
2494         __nonesuch_no_braces.
2495         (operator=(pair&&)): Likewise
2496         * include/std/tuple (operator=(const tuple&)): Use __nonesuch instead
2497         of __nonesuch_no_braces.
2498         (operator=(tuple&&)): Likewise
2499         * include/experimental/type_traits (struct nonesuch): Added private
2500         base class to make nonesuch not an aggregate and removed deleted
2501         default constructor.
2502         * testsuite/20_util/nonesuch/nonesuch.cc: New.
2503         * testsuite/experimental/type_traits/nonesuch.cc: New.
2504
2505 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
2506
2507         * include/bits/std_function.h (_Simple_type_wrapper): Remove.
2508         (_Function_handler): Remove partial specializations for void return
2509         types and pointers to member.
2510         (_Function_handler::_M_manager): Adapt to removal of
2511         _Simple_type_wrapper.
2512         (_Function_handler::_M_invoke): Use __invoke_r instead of __invoke.
2513         * include/std/functional (_Bind_result::__enable_if_void)
2514         (_Bind_result::__disable_if_void): Remove sfinae helpers.
2515         (_Bind_result::__call): Use __invoke_r and remove overloads for void
2516         return types.
2517         * include/std/future (__future_base::_Task_state::_M_run)
2518         (__future_base::_Task_state::_M_run_delayed): Use __invoke_r and
2519         change return type of lambda expressions.
2520
2521         * include/bits/invoke.h (__invoke_r): Define new function implementing
2522         the INVOKE<R> pseudo-function.
2523         * testsuite/20_util/function_objects/invoke/1.cc: Add more tests.
2524         * testsuite/20_util/function_objects/invoke/2.cc: New test.
2525
2526         * include/std/type_traits (__is_nt_convertible_helper): Define it
2527         unconditionally, not only for C++20.
2528         (__is_nothrow_convertible): Define internal trait for use in C++11.
2529         (__is_nt_invocable_impl: Fix by using __is_nothrow_convertible.
2530         (is_invocable_r_v, is_nothrow_invocable_r_v): Add missing parameter.
2531         * testsuite/20_util/is_nothrow_convertible/value_ext.cc: New test.
2532         * testsuite/20_util/is_nothrow_convertible/value.cc: Check with type
2533         that has nothrow explicit conversion but potentially-throwing implicit
2534         conversion.
2535         * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise.
2536         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix helper
2537         function to only consider implicit conversions.
2538         * testsuite/20_util/tuple/cons/noexcept_specs.cc: Add comment.
2539
2540         * include/std/iterator: Include <iosfwd> instead of <istream> and
2541         <ostream>.
2542
2543         * include/bits/stl_tree.h (_Rb_tree::erase(const Key*, const Key*)):
2544         Remove unused, non-standard function.
2545
2546         * include/bits/regex.h (match_results::max_size()): Adjust return
2547         value to account for prefix/suffix/unmatched subs.
2548         (match_results::_M_resize(unsigned int)): Use _Base_type::assign to
2549         reset the contained sub matches.
2550         (match_results::_M_establish_failed_match(_Bi_iter)): Add new member
2551         function to set result state following a failed match.
2552         * include/bits/regex.tcc (__regex_algo_impl): Remove loop to set
2553         sub_match states after _M_resize. Use _M_establish_failed_match.
2554
2555         PR libstdc++/69724
2556         * include/std/thread (thread::_State_impl, thread::_S_make_state):
2557         Replace single _Callable parameter with variadic _Args pack, to
2558         forward them directly to the tuple of decayed copies.
2559         * testsuite/30_threads/thread/cons/69724.cc: New test.
2560
2561 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2562
2563         Inconsistency wrt Allocators in basic_string assignment (LWG2579)
2564         * include/bits/basic_string.h: (operator=(const basic_string&):
2565         Move allocator decision to assign.
2566         (assign(const basic_string&)): Move allocator decision here.
2567         * testsuite/21_strings/basic_string/allocator/char/copy_assign.cc:
2568         Add tests.
2569         * testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc:
2570         Add tests.
2571
2572 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
2573
2574         * testsuite/util/testsuite_allocator.h (memory_resource)
2575         (default_resource_mgr): Fix indentation.
2576
2577         * testsuite/20_util/allocator_traits/members/allocate_hint_nonpod.cc:
2578         Use operator-> to access raw pointer member.
2579         * testsuite/23_containers/vector/59829.cc: Likewise.
2580         * testsuite/23_containers/vector/bool/80893.cc: Likewise.
2581         * testsuite/libstdc++-prettyprinters/cxx11.cc: Use NullablePointer.
2582         * testsuite/util/testsuite_allocator.h (NullablePointer): New utility
2583         for tests.
2584         (PointerBase, PointerBase_void): Derive from NullablePointer and use
2585         its constructors and equality operators. Change converting
2586         constructors to use operator-> to access private member of the other
2587         pointer type.
2588         (PointerBase_void::operator->()): Add, for access to private member.
2589         (operator-(PointerBase, PointerBase)): Change to hidden friend.
2590         (operator==(PointerBase, PointerBase)): Remove.
2591         (operator!=(PointerBase, PointerBase)): Remove.
2592
2593         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__): Do
2594         not assume field called _M_head_impl is the first tuple element.
2595         * testsuite/libstdc++-prettyprinters/compat.cc: Make tuple
2596         implementation more accurate.
2597         * testsuite/libstdc++-prettyprinters/cxx11.cc: Check unique_ptr with
2598         empty pointer type and non-empty deleter.
2599
2600         LWG 2899 - Make is_move_constructible correct for unique_ptr
2601         * include/bits/unique_ptr.h (__uniq_ptr_impl): Add move constructor,
2602         move assignment operator.
2603         (__uniq_ptr_impl::release(), __uniq_ptr_impl::reset(pointer)): Add.
2604         (__uniq_ptr_data): New class template with conditionally deleted
2605         special members.
2606         (unique_ptr, unique_ptr<T[], D>): Change type of data member from
2607         __uniq_ptr_impl<T, D> to __uniq_ptr_data<T, D>. Define move
2608         constructor and move assignment operator as defaulted.
2609         (unique_ptr::release(), unique_ptr<T[], D>::release()): Forward to
2610         __uniq_ptr_impl::release().
2611         (unique_ptr::reset(pointer), unique_ptr<T[], D>::reset<U>(U)): Forward
2612         to __uniq_ptr_impl::reset(pointer).
2613         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
2614         Check for new __uniq_ptr_data type.
2615         * testsuite/20_util/unique_ptr/dr2899.cc: New test.
2616
2617 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
2618
2619         PR libstdc++/90454.cc path construction from void*
2620         * include/bits/fs_path.h (path::_Path): Use remove_pointer so that
2621         pointers to void are rejected as well as void.
2622         * include/experimental/bits/fs_path.h (path::_Path): Likewise.
2623         * testsuite/27_io/filesystem/path/construct/80762.cc: Also check
2624         pointers to void.
2625         * testsuite/experimental/filesystem/path/construct/80762.cc: Likewise.
2626
2627         * doc/xml/manual/policy_data_structures.xml: Comment out stray
2628         <remark> elements. Fix formatting of bibliography references.
2629
2630 2019-05-13  Edward Smith-Rowland  <3dw4rd@verizon.net>
2631
2632         * doc/xml/manual/status_cxx2020.xml: Document P0811R3 status.
2633
2634 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
2635
2636         Remove Profile Mode, deprecated since 7.1.0
2637         * doc/Makefile.am: Remove XML file for profile mode docs.
2638         * doc/Makefile.in: Regenerate.
2639         * doc/xml/authors.xml: Remove authors of profile mode docs.
2640         * doc/xml/manual/appendix_contributing.xml: Remove mention of profile
2641         mode.
2642         * doc/xml/manual/debug.xml: Likewise.
2643         * doc/xml/manual/evolution.xml: Document removal of profile mode.
2644         * doc/xml/manual/profile_mode.xml: Remove profile mode docs.
2645         * doc/xml/manual/spine.xml: Remove profile mode author credit.
2646         * doc/xml/manual/test.xml: Remove docs for dg-require-profile-mode
2647         directive.
2648         * doc/xml/manual/using.xml: Remove docs for profile mode headers and
2649         macro.
2650         * doc/html/*: Regenerate.
2651         * include/Makefile.am: Remove profile mode headers.
2652         * include/Makefile.in: Regenerate.
2653         * include/bits/c++config (std::__profile): Remove namespace.
2654         [_GLIBCXX_PROFILE]: Remove checks for macro.
2655         * include/profile/array: Remove.
2656         * include/profile/base.h: Remove.
2657         * include/profile/bitset: Remove.
2658         * include/profile/deque: Remove.
2659         * include/profile/forward_list: Remove.
2660         * include/profile/impl/profiler.h: Remove.
2661         * include/profile/impl/profiler_algos.h: Remove.
2662         * include/profile/impl/profiler_container_size.h: Remove.
2663         * include/profile/impl/profiler_hash_func.h: Remove.
2664         * include/profile/impl/profiler_hashtable_size.h: Remove.
2665         * include/profile/impl/profiler_list_to_slist.h: Remove.
2666         * include/profile/impl/profiler_list_to_vector.h: Remove.
2667         * include/profile/impl/profiler_map_to_unordered_map.h: Remove.
2668         * include/profile/impl/profiler_node.h: Remove.
2669         * include/profile/impl/profiler_state.h: Remove.
2670         * include/profile/impl/profiler_trace.h: Remove.
2671         * include/profile/impl/profiler_vector_size.h: Remove.
2672         * include/profile/impl/profiler_vector_to_list.h: Remove.
2673         * include/profile/iterator_tracker.h: Remove.
2674         * include/profile/list: Remove.
2675         * include/profile/map: Remove.
2676         * include/profile/map.h: Remove.
2677         * include/profile/multimap.h: Remove.
2678         * include/profile/multiset.h: Remove.
2679         * include/profile/ordered_base.h: Remove.
2680         * include/profile/set: Remove.
2681         * include/profile/set.h: Remove.
2682         * include/profile/unordered_base.h: Remove.
2683         * include/profile/unordered_map: Remove.
2684         * include/profile/unordered_set: Remove.
2685         * include/profile/vector: Remove.
2686         * scripts/run_doxygen: Do not process profile mode headers.
2687         * testsuite/23_containers/array/element_access/60497.cc: Don't use
2688         profile mode type.
2689         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
2690         Remove dg-skip-if for profile mode.
2691         * testsuite/23_containers/forward_list/capacity/1.cc: Remove
2692         preprocessor check for profile mode.
2693         * testsuite/23_containers/list/capacity/29134.cc: Likewise.
2694         * testsuite/23_containers/map/modifiers/extract.cc: Remove dg-skip-if
2695         for profile mode.
2696         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
2697         Likewise.
2698         * testsuite/23_containers/map/modifiers/try_emplace/1.cc: Likewise.
2699         * testsuite/23_containers/multimap/modifiers/extract.cc: Likewise.
2700         * testsuite/23_containers/multiset/modifiers/extract.cc: Likewise.
2701         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
2702         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
2703         Likewise.
2704         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
2705         Likewise.
2706         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
2707         Likewise.
2708         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
2709         Likewise.
2710         * testsuite/23_containers/vector/bool/capacity/29134.cc: Remove
2711         preprocessor check for profile mode.
2712         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
2713         Likewise.
2714         * testsuite/23_containers/vector/modifiers/insert_vs_emplace.cc:
2715         Remove dg-skip-if for profile mode.
2716         * testsuite/25_algorithms/binary_search/partitioned.cc: Likewise.
2717         * testsuite/25_algorithms/equal_range/partitioned.cc: Likewise.
2718         * testsuite/25_algorithms/lexicographical_compare/71545.cc: Likewise.
2719         * testsuite/25_algorithms/lower_bound/partitioned.cc: Likewise.
2720         * testsuite/25_algorithms/upper_bound/partitioned.cc: Likewise.
2721         * testsuite/Makefile.am: Remove profile_flags variable and
2722         * testsuite/Makefile.am: Remove profile_flags variable and
2723         check-profile target.
2724         * testsuite/Makefile.in: Regenerate.
2725         * testsuite/ext/profile/all.cc: Remove.
2726         * testsuite/ext/profile/mutex_extensions_neg.cc: Remove.
2727         * testsuite/ext/profile/profiler_algos.cc: Remove.
2728         * testsuite/ext/profile/replace_new.cc: Remove.
2729         * testsuite/ext/throw_allocator/deallocate_global.cc: Remove
2730         preprocessor check for profile mode.
2731         * testsuite/ext/throw_allocator/deallocate_local.cc: Likewise.
2732         * testsuite/lib/libstdc++.exp (check_v3_target_profile_mode): Remove.
2733         (check_v3_target_normal_mode): Do not check for profile mode macro.
2734         * testsuite/libstdc++-prettyprinters/80276.cc: Remove dg-skip-if for
2735         profile mode.
2736         * testsuite/libstdc++-prettyprinters/compat.cc: Likewise.
2737         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
2738         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
2739         * testsuite/libstdc++-prettyprinters/debug.cc: Likewise.
2740         * testsuite/libstdc++-prettyprinters/debug_cxx11.cc: Likewise.
2741         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
2742         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
2743         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
2744         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
2745         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
2746
2747         Remove array_allocator extension, deprecated since 4.9.0
2748         * doc/xml/manual/allocator.xml: Remove documentation for
2749         array_allocator.
2750         * doc/xml/manual/evolution.xml: Document array_allocator removal.
2751         * doc/xml/manual/using.xml: Remove header from documentation.
2752         * include/Makefile.am: Remove <ext/array_allocator.h> header.
2753         * include/Makefile.in: Regenerate.
2754         * include/ext/array_allocator.h: Remove.
2755         * include/precompiled/extc++.h: Do not include removed header.
2756         * testsuite/ext/array_allocator/1.cc: Remove.
2757         * testsuite/ext/array_allocator/2.cc: Remove.
2758         * testsuite/ext/array_allocator/26875.cc: Remove.
2759         * testsuite/ext/array_allocator/3.cc: Remove.
2760         * testsuite/ext/array_allocator/check_deallocate_null.cc: Remove.
2761         * testsuite/ext/array_allocator/check_delete.cc: Remove.
2762         * testsuite/ext/array_allocator/check_new.cc: Remove.
2763         * testsuite/ext/array_allocator/variadic_construct.cc: Remove.
2764         * testsuite/ext/headers.cc: Do not include removed header.
2765
2766 2019-05-11  François Dumont  <fdumont@gcc.gnu.org>
2767
2768         * include/bits/stl_bvector.h
2769         (operator==(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2770         Make hidden friend.
2771         (operator<(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2772         Likewise.
2773         (operator!=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2774         Likewise.
2775         (operator>(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2776         Likewise.
2777         (operator<=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2778         Likewise.
2779         (operator>=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2780         Likewise.
2781         (operator-(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2782         Likewise.
2783         (_Bit_iterator::operator+(difference_type)): Likewise and allow NRVO
2784         copy elision.
2785         (_Bit_iterator::operator-(difference_type)): Likewise.
2786         (operator+(ptrdiff_t, const _Bit_iterator&)): Make hidden friend.
2787         (_Bit_const_iterator::operator+(difference_type)): Likewise and allow
2788         NRVO copy elision.
2789         (_Bit_const_iterator::operator-(difference_type)): Likewise.
2790         (operator+(ptrdiff_t, const _Bit_const_iterator&)): Make hidden friend.
2791
2792 2019-05-10  Jonathan Wakely  <jwakely@redhat.com>
2793
2794         PR libstdc++/81266
2795         * testsuite/util/thread/all.h: Do not use remove_pointer for
2796         std::thread::native_handle_type.
2797
2798         PR libstdc++/90397
2799         * include/std/variant (_Variant_storage<false, Types...>::_M_storage())
2800         (_Variant_storage<true, Types...>::_M_reset()))
2801         (_Variant_storage<true, Types...>::_M_storage())): Add noexcept.
2802         (__get_storage): Likewise.
2803         (variant): Add noexcept to friend declarations for __get and
2804         __get_storage.
2805
2806         PR libstdc++/90388
2807         * include/bits/unique_ptr.h (default_delete, default_delete<T[]>):
2808         Use _Require for constraints.
2809         (operator>(nullptr_t, const unique_ptr<T,D>&)): Implement exactly as
2810         per the standard.
2811         (__uniq_ptr_hash): New base class with conditionally-disabled call
2812         operator.
2813         (hash<unique_ptr<T,D>>): Derive from __uniq_ptr_hash.
2814         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
2815         * testsuite/20_util/unique_ptr/hash/90388.cc: New test.
2816
2817         * include/bits/shared_ptr.h: Improve docs.
2818         * include/bits/shared_ptr_base.h: Likewise.
2819         * include/bits/stl_uninitialized.h: Likewise.
2820         * include/bits/unique_ptr.h: Likewise.
2821         * libsupc++/new: Likewise.
2822
2823 2019-05-09  François Dumont  <fdumont@gcc.gnu.org>
2824
2825         * include/bits/stl_deque.h
2826         (operator==(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2827         Make hidden friend.
2828         (operator!=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2829         Likewise.
2830         (operator<(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2831         Likewise.
2832         (operator<=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2833         Likewise.
2834         (operator>(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2835         Likewise.
2836         (operator>=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2837         Likewise.
2838         (_Deque_iterator<>::operator+(difference_type)): Likewise and allow NRVO
2839         copy elision.
2840         (_Deque_iterator<>::operator-(difference_type)): Likewise.
2841
2842 2019-05-08  François Dumont  <fdumont@gcc.gnu.org>
2843
2844         PR libstdc++/90277
2845         * testsuite/23_containers/unordered_multiset/insert/24061-multiset.cc
2846         (test01): Reserve for number of insertions to avoid rehash during test.
2847         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
2848         (test01): Likewise.
2849         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
2850         (test01): Likewise.
2851         (test02): Likewise.
2852         (test03): Likewise.
2853
2854 2019-05-08  Jonathan Wakely  <jwakely@redhat.com>
2855
2856         * include/experimental/bits/fs_path.h: Improve docs.
2857         * include/experimental/bits/net.h: Fix wrong header name in comment.
2858         Do not document implementation details.
2859         * include/experimental/netfwd: Fix doxygen grouping.
2860
2861 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
2862
2863         * include/bits/stl_pair.h: Improve docs.
2864         * include/std/tuple: Likewise.
2865
2866         * doc/doxygen/doxygroups.cc (std::literals): Add documentation for
2867         inline namespace.
2868         * include/std/chrono: Improve docs.
2869         * include/std/ratio: Do not document implementation details.
2870         * testsuite/20_util/ratio/cons/cons_overflow_neg.cc: Adjust dg-error
2871         line numbers.
2872         * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Likewise.
2873
2874         PR libstdc++/89102
2875         * doc/xml/manual/intro.xml: Document DR 2408 and 2465 changes.
2876         * include/std/chrono (__duration_common_type_wrapper): Replace with ...
2877         (__duration_common_type): New helper.
2878         (common_type<chrono::duration<R1, P2>, chrono::duration<R2, P2>>): Use
2879         __duration_common_type.
2880         (__timepoint_common_type_wrapper): Replace with ...
2881         (__timepoint_common_type): New helper.
2882         (common_type<chrono::time_point<C, D2>, chrono::time_point<C, D2>>):
2883         Use __time_point_common_type.
2884         * include/std/type_traits (common_type<>): Define, as per LWG 2408.
2885         (__common_type_impl): If either argument is transformed by decay,
2886         use the common_type of the decayed types.
2887         (__common_type_impl<_Tp, _Up, _Tp, _Up>): If the types are already
2888         decayed, use __do_common_type_impl to get the common_type.
2889         (common_type<_Tp>): Use common_type<_Tp, _Tp>.
2890         (__do_member_type_wrapper, __member_type_wrapper)
2891         (__expanded_common_type_wrapper): Remove.
2892         (__common_type_pack, __common_type_fold): New helpers.
2893         (common_type<_Tp, _Up, _Vp...>): Use new helpers instead of
2894         __member_type_wrapper and __expanded_common_type_wrapper.
2895         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
2896         Test zero-length template argument list.
2897         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
2898         Test single argument cases and argument types that should decay.
2899         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
2900         Adjust expected error.
2901         * testsuite/20_util/duration/literals/range_neg.cc: Use zero for
2902         dg-error lineno.
2903         * testsuite/20_util/duration/requirements/typedefs_neg1.cc: Likewise.
2904         * testsuite/20_util/duration/requirements/typedefs_neg2.cc: Likewise.
2905         * testsuite/20_util/duration/requirements/typedefs_neg3.cc: Likewise.
2906
2907         * doc/xml/manual/intro.xml: Fix DR 2537 and DR 2566 confusion.
2908
2909 2019-05-01  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2910
2911         Make allocator propagation more consistent for
2912         operator+(basic_string) (P1165R1)
2913         * include/bits/basic_string.h
2914         (operator+(basic_string&&, basic_string&&): Changed resulting
2915         allocator to always be the one from the first parameter.
2916         * include/bits/basic_string.tcc
2917         (operator+(const _CharT*, const basic_string&)): Changed
2918         resulting allocator to be SOCCC on the second parameter's allocator.
2919         (operator+(_CharT, const basic_string&)): Likewise.
2920         * testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
2921         New.
2922         * testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
2923         New.
2924
2925 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
2926
2927         * include/bits/regex.h: Improve docs.
2928         * include/bits/regex.tcc: Do not document implementation details.
2929
2930         * testsuite/19_diagnostics/error_code/hash.cc: New test.
2931
2932 2019-05-06  François Dumont  <fdumont@gcc.gnu.org>
2933
2934         * python/libstdcxx/v6/printers.py (add_one_template_type_printer):
2935         Add type printer for container types in std::__debug namespace.
2936         * testsuite/lib/gdb-test.exp (whatis-regexp-test): New.
2937         (gdb-tests): Use distinct parameters for the type of test and use of
2938         regex.
2939         (gdb-test): Check for regex test even if 'whatis' test.
2940         * testsuite/libstdc++-prettyprinters/80276.cc: Adapt for _GLIBCXX_DEBUG
2941         mode.
2942         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
2943         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
2944         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
2945         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
2946         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
2947         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
2948         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
2949
2950 2019-05-04  Jonathan Wakely  <jwakely@redhat.com>
2951
2952         * include/std/system_error (error_category): Fix comment.
2953
2954         PR libstdc++/90299
2955         * src/c++17/fs_ops.cc (absolute(const path&)): Report an error if the
2956         argument is an empty path.
2957         (absolute(const path&, error_code&)): Use invalid_argument as error
2958         code instead of no_such_file_or_directory.
2959         * testsuite/27_io/filesystem/operations/absolute.cc: Check handling
2960         of non-existent paths and empty paths with both overloads of absolute.
2961
2962         * include/std/system_error (error_category, error_code)
2963         (error_condition): Improve docs.
2964         * libsupc++/exception: Add missing @addtogroup Doxygen command.
2965         * libsupc++/exception_ptr.h (exception_ptr): Link equality operators
2966         to class documentation. Suppress documentation for implementation
2967         details.
2968         * libsupc++/nested_exception.h (throw_with_nested, rethrow_if_nested):
2969         Suppress documentation for implementation details.
2970
2971         * include/std/system_error (error_code): Remove friend declaration
2972         for hash<error_code>.
2973         (hash<error_code>::operator()): Use public member functions to access
2974         value and category.
2975         (hash<error_condition>::operator()): Use address of category, not
2976         its object representation.
2977         * src/c++11/compatibility-c++0x.cc (hash<error_code>::operator()):
2978         Use public member functions to access value and category.
2979         * testsuite/19_diagnostics/error_condition/hash.cc: New test.
2980
2981 2019-05-04  François Dumont  <fdumont@gcc.gnu.org>
2982
2983         * include/bits/hashtable.h (_Hashtable<>::rehash): Review comment.
2984         * include/bits/hashtable_policy.h
2985         (_Prime_rehash_policy::_M_bkt_for_elements): Use __builtin_ceill.
2986         (_Power2_rehash_policy::_M_bkt_for_elements): Likewise.
2987         (_Power2_rehash_policy::_M_next_bkt): Enforce returning a result not
2988         smaller than input value rather than always greater. Preserve
2989         _M_next_resize if called with 0 input. Use __builtin_floorl.
2990         (_Power2_rehash_policy::_M_need_rehash): Rehash only if number of
2991         elements + number of insertions is greater than _M_next_resize. Start
2992         with 11 buckets if not told otherwise. Use __builtin_floorl.
2993         (_Rehash_base<>::reserve): Use rehash policy _M_bkt_for_elements.
2994         * src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy::_M_next_bkt):
2995         Preserve _M_next_resize if called with 0 input. Use __builtin_floorl.
2996         (_Prime_rehash_policy::_M_need_rehash): Start with 11 buckets if not
2997         told otherwise. Use __builtin_floorl.
2998         * testsuite/23_containers/unordered_set/hash_policy/71181.cc: Adapt test
2999         to also validate _Power2_rehash_policy.
3000         * testsuite/23_containers/unordered_set/hash_policy/power2_rehash.cc:
3001         Adapt.
3002
3003 2019-05-03  Jonathan Wakely  <jwakely@redhat.com>
3004
3005         PR libstdc++/61761
3006         * testsuite/26_numerics/complex/proj.cc: Don't assume <cmath> defines
3007         std::copysign.
3008
3009         PR libstdc++/52119
3010         * include/ext/numeric_traits.h (__glibcxx_min): Avoid integer
3011         overflow warning with -Wpedantic -Wsystem-headers.
3012
3013 2019-05-02  Jonathan Wakely  <jwakely@redhat.com>
3014
3015         PR libstdc++/90314
3016         * include/bits/c++config (_GLIBCXX_NOEXCEPT_IF): Use variadic macro.
3017         * include/bits/move.h (swap): Remove extra parentheses.
3018
3019         * include/experimental/bits/lfts_config.h: Improve doc markup.
3020         * include/experimental/optional: Improve docs.
3021         (_Has_addressof_mem, _Has_addressof_free, _Has_addressof)
3022         (__constexpr_addressof): Remove.
3023         (optional::operator->()): Use std::__addressof().
3024         * include/std/optional (optional::operator->()): Adjust whitespace.
3025         * testsuite/experimental/optional/constexpr/observers/2.cc: Check
3026         that operator-> is still constexpr with overloaded operator&. Change
3027         to compile-only test.
3028         * testsuite/experimental/optional/constexpr/observers/3.cc: Change to
3029         compile-only test.
3030
3031         * include/bits/shared_ptr.h: Improve docs.
3032         * include/bits/shared_ptr_atomic.h: Likewise.
3033         * include/bits/unique_ptr.h: Likewise. Adjust whitespace.
3034
3035         * include/bits/basic_string.h: Fix iterator/index confusion in
3036         Doxygen comments.
3037         * include/bits/range_access.h: Fix Doxygen warnings.
3038         * include/bits/refwrap.h: Do not document implementation details.
3039         (ref, cref): Group docs with reference_wrapper.
3040         * include/std/fstream: Fix Doxygen markup.
3041         * libsupc++/initializer_list (begin, end): Group docs with
3042         initializer_list.
3043
3044         * doc/doxygen/user.cfg.in: Set MARKDOWN_SUPPORT=YES.
3045
3046         * include/bits/unique_lock.h: Fix/improve doxygen markup.
3047         * include/std/mutex: Likewise.
3048         * include/std/shared_mutex: Likewise.
3049
3050         * include/bits/fs_dir.h: Fix/improve doxygen markup.
3051         * include/bits/fs_fwd.h: Likewise.
3052         * include/bits/fs_ops.h: Likewise.
3053         * include/bits/fs_path.h: Likewise.
3054         * include/std/filesystem: Likewise.
3055
3056         * include/experimental/bits/net.h: Fix/improve doxygen markup.
3057         * include/experimental/buffer: Likewise.
3058         * include/experimental/executor: Likewise.
3059         * include/experimental/internet: Likewise.
3060         * include/experimental/io_context: Likewise.
3061         * include/experimental/net: Likewise.
3062         * include/experimental/netfwd: Likewise.
3063         * include/experimental/socket: Likewise.
3064         * include/experimental/timer: Likewise.
3065
3066         * doc/doxygen/doxygroups.cc: Move description of experimental group
3067         here.
3068         * include/experimental/algorithm: Add to libfund-ts doc group.
3069         * include/experimental/any: Likewise. Do not document implementation
3070         details.
3071         * include/experimental/array: Add to libfund-ts doc group.
3072         * include/experimental/bits/lfts_config.h: Define libfund-ts doc group
3073         for Library Fundamentals.
3074         * include/experimental/chrono: Add to libfund-ts doc group.
3075         * include/experimental/deque: Likewise.
3076         * include/experimental/forward_list: Likewise.
3077         * include/experimental/functional: Likewise.
3078         * include/experimental/iterator: Likewise.
3079         * include/experimental/list: Likewise.
3080         * include/experimental/map: Likewise.
3081         * include/experimental/memory: Likewise.
3082         * include/experimental/memory_resource: Likewise. Improve docs.
3083         details.
3084         * include/experimental/numeric: Add to libfund-ts doc group.
3085         * include/experimental/optional: Likewise.
3086         * include/experimental/propagate_const: Likewise.
3087         * include/experimental/random: Likewise.
3088         * include/experimental/ratio: Likewise.
3089         * include/experimental/regex: Likewise.
3090         * include/experimental/set: Likewise.
3091         * include/experimental/source_location: Likewise.
3092         * include/experimental/string: Likewise.
3093         * include/experimental/string_view: Likewise.
3094         * include/experimental/system_error: Likewise.
3095         * include/experimental/tuple: Likewise.
3096         * include/experimental/type_traits: Likewise.
3097         * include/experimental/unordered_map: Likewise.
3098         * include/experimental/unordered_set: Likewise.
3099         * include/experimental/utility: Likewise.
3100         * include/experimental/vector: Likewise.
3101         * testsuite/experimental/any/misc/any_cast_neg.cc: Adjust dg-error.
3102         * testsuite/experimental/array/neg.cc: Adjust dg-error.
3103         * testsuite/experimental/propagate_const/assignment/move_neg.cc:
3104         Likewise.
3105         * testsuite/experimental/propagate_const/cons/move_neg.cc: Likewise.
3106         * testsuite/experimental/propagate_const/requirements2.cc: Likewise.
3107         * testsuite/experimental/propagate_const/requirements3.cc: Likewise.
3108         * testsuite/experimental/propagate_const/requirements4.cc: Likewise.
3109         * testsuite/experimental/propagate_const/requirements5.cc: Likewise.
3110
3111         * include/experimental/bits/fs_dir.h: Fix Doxygen markup.
3112         * include/experimental/bits/fs_fwd.h: Improve docs.
3113         * include/experimental/bits/fs_ops.h: fix Doxygen markup.
3114         * include/experimental/bits/fs_path.h: Likewise.
3115         (path, filesystem_error, u8path): Improve docs.
3116         * include/experimental/filesystem: Link to docs for TS.
3117
3118         * config/allocator/new_allocator_base.h (__allocator_base): Add
3119         workaround for Doxygen bug #6945.
3120         * include/std/memory: Improve docs. Define group for pointer safety.
3121         * include/std/scoped_allocator: Improve docs. Use "undocumented"
3122         conditional to suppress documentation for implementation details.
3123
3124         * include/bits/specfun.h: Improve docs.
3125         * include/tr1/cmath: Likewise. Fix nesting of preprocessor conditions
3126         and namespaces.
3127
3128         * doc/doxygen/doxygroups.cc (std::tr2, std::__gnu_cxx): Improve docs.
3129         (std::experimental): Add docs.
3130         * doc/doxygen/user.cfg.in (PREDEFINED): Expand macros for __cxx11
3131         namespace to nothing when generating docs.
3132         * include/bits/regex_constants.h (std::regex_constants): Improve docs.
3133         * include/std/chrono (std::chrono): Likewise.
3134         * include/std/functional (std::placeholders): Likewise.
3135         * include/std/thread (std::this_thread): Likewise.
3136
3137         * include/parallel/settings.h: Fix Doxygen markup.
3138
3139         * include/ext/pb_ds/detail/bin_search_tree_/*_imps.hpp: Do not define
3140         anything unless PB_DS_CLASS_C_DEC is defined.
3141         * include/ext/pb_ds/detail/binary_heap_/*_imps.hpp: Likewise.
3142         * include/ext/pb_ds/detail/binomial_heap_/*_imps.hpp: Likewise.
3143         * include/ext/pb_ds/detail/binomial_heap_base_/*_imps.hpp: Likewise.
3144         * include/ext/pb_ds/detail/cc_hash_table_map_/*_imps.hpp: Likewise.
3145         * include/ext/pb_ds/detail/gp_hash_table_map_/*_imps.hpp: Likewise.
3146         * include/ext/pb_ds/detail/hash_fn/*_imp.hpp: Likewise.
3147         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/*_imps.hpp:
3148         Likewise.
3149         * include/ext/pb_ds/detail/list_update_map_/*_imps.hpp: Likewise.
3150         * include/ext/pb_ds/detail/ov_tree_map_/*_imps.hpp: Likewise.
3151         * include/ext/pb_ds/detail/pairing_heap_/*_imps.hpp: Likewise.
3152         * include/ext/pb_ds/detail/pat_trie_/*_imps.hpp: Likewise.
3153         * include/ext/pb_ds/detail/rb_tree_map_/*_imps.hpp: Likewise.
3154         * include/ext/pb_ds/detail/rc_binomial_heap_/*_imps.hpp: Likewise.
3155         * include/ext/pb_ds/detail/resize_policy*_imp.hpp: Likewise.
3156         * include/ext/pb_ds/detail/splay_tree_/*_imps.hpp: Likewise.
3157         * include/ext/pb_ds/detail/thin_heap_/*_imps.hpp: Likewise.
3158         * include/ext/pb_ds/detail/trie_policy*_imp.hpp: Likewise.
3159         * include/ext/pb_ds/detail/unordered_iterator/const_iterator.hpp:
3160         Likewise.
3161         * include/ext/pb_ds/detail/unordered_iterator/iterator.hpp: Likewise.
3162         * include/ext/pb_ds/detail/unordered_iterator/point_const_iterator.hpp:
3163         Likewise.
3164         * include/ext/pb_ds/detail/unordered_iterator/point_iterator.hpp:
3165         Likewise.
3166
3167         * doc/doxygen/user.cfg.in: Regenerate with Doxygen 1.8.14 and set
3168         GROUP_NESTED_COMPOUNDS=YES and SORT_BY_SCOPE_NAME=NO. Add various
3169         _GLIBCXX_xxx macros and __attribute__(X) to PREDEFINED macros that
3170         Doxygen expands.
3171
3172 2019-05-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
3173
3174         * config/abi/post/i386-solaris2.10/baseline_symbols.txt: Regenerate.
3175         * config/abi/post/i386-solaris2.10/amd64/baseline_symbols.txt: Likewise.
3176         * config/abi/post/i386-solaris2.11/baseline_symbols.txt: Likewise.
3177         * config/abi/post/i386-solaris2.11/amd64/baseline_symbols.txt: Likewise.
3178         * config/abi/post/sparc-solaris2.10/baseline_symbols.txt: Likewise.
3179         * config/abi/post/sparc-solaris2.10/sparcv9/baseline_symbols.txt:
3180         Likewise.
3181         * config/abi/post/sparc-solaris2.11/baseline_symbols.txt: Likewise.
3182         * config/abi/post/sparc-solaris2.11/sparcv9/baseline_symbols.txt:
3183         Likewise.
3184
3185 2019-05-01  Jonathan Wakely  <jwakely@redhat.com>
3186
3187         PR libstdc++/61761
3188         * include/std/complex (__complex_proj): Return parameter unchanged.
3189         [_GLIBCXX_USE_C99_COMPLEX] (__complex_proj): Change overloads for
3190         floating-point types to take std::complex arguments.
3191         [_GLIBCXX_USE_C99_MATH_TR1] (__complex_proj): Add overloads for
3192         floating-point types.
3193         * testsuite/26_numerics/complex/proj.cc: New test.
3194
3195 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
3196
3197         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Change _Lock_policyE2 exports
3198         to _Lock_policyE[012].
3199         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
3200
3201 2019-04-30  Jonathan Wakely  <jwakely@redhat.com>
3202
3203         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Remove
3204         macros accidentally left in.
3205         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Remove
3206         unnecessary -lstdc++fs option. Fix test for mingw.
3207         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
3208         Fix test for mingw.
3209
3210 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
3211
3212         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
3213
3214 2019-04-29  Jonathan Wakely  <jwakely@redhat.com>
3215
3216         * include/bits/stl_algo.h (generate_n): Adjust doxygen comment.
3217
3218         * include/bits/move.h (swap(T&, T&), swap(T (&)[N], T (&)[N])): Use
3219         _GLIBCXX_NOEXCEPT_IF to simplify declarations.
3220
3221         PR libstdc++/71312
3222         * src/c++11/shared_ptr.cc (get_mutex): Align pool mutexes to 64 bytes.
3223
3224         * include/bits/stl_bvector.h (vector<bool>::empty()): Add nodiscard
3225         attribute.
3226
3227         * include/bits/stl_iterator_base_types.h (_Iter_base): Remove unused
3228         class template and partial specialization.
3229
3230         PR libstdc++/87982
3231         * include/bits/stl_algo.h (generate_n): Convert _Size parameter to
3232         an integral type.
3233         * include/bits/stl_algobase.h (__size_to_integer): New overloaded
3234         functions to convert a value to an integral type.
3235         (__fill_n_a, __fill_n_a): Assert that __n is already an integral type.
3236         (fill_n): Convert _Size parameter to an integral type.
3237         * testsuite/25_algorithms/fill_n/87982.cc: New test.
3238         * testsuite/25_algorithms/fill_n/87982_neg.cc: New test.
3239         * testsuite/25_algorithms/fill_n/dr426.cc: New test.
3240         * testsuite/25_algorithms/generate_n/87982.cc: New test.
3241         * testsuite/25_algorithms/generate_n/87982_neg.cc: New test.
3242         * testsuite/25_algorithms/generate_n/dr426.cc: New test.
3243
3244 2019-04-28  Nina Dinka Ranns  <dinka.ranns@gmail.com>
3245
3246         Adding noexcept-specification on tuple constructors (LWG 2899)
3247         * libstdc++-v3/include/std/tuple:
3248         (tuple()): Add noexcept-specification.
3249         (tuple(const _Elements&...)): Likewise
3250         (tuple(_UElements&&...)): Likewise
3251         (tuple(const tuple<_UElements...>&)): Likewise
3252         (tuple(tuple<_UElements...>&&)): Likewise
3253         (tuple(const _T1&, const _T2&)): Likewise
3254         (tuple(_U1&&, _U2&&)): Likewise
3255         (tuple(const tuple<_U1, _U2>&): Likewise
3256         (tuple(tuple<_U1, _U2>&&): Likewise
3257         (tuple(const pair<_U1, _U2>&): Likewise
3258         (tuple(pair<_U1, _U2>&&): Likewise
3259         * libstdc++-v3/testsuite/20_util/tuple/cons/noexcept_specs.cc: New
3260
3261 2019-04-27  Marc Glisse  <marc.glisse@inria.fr>
3262
3263         PR libstdc++/87106
3264         * include/bits/stl_uninitialized.h (__relocate_object_a): Mark the
3265         arguments with __restrict.
3266
3267 2019-04-26  H.J. Lu  <hongjiu.lu@intel.com>
3268
3269         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
3270
3271 2019-04-26  Jonathan Wakely  <jwakely@redhat.com>
3272
3273         * include/experimental/bits/fs_path.h
3274         (path::_S_convert_loc<_InputIterator>): Create const std::string to
3275         avoid redundant call to _S_convert_loc with non-const pointers.
3276
3277         * testsuite/20_util/variant/run.cc: Use a new Hashable type to test
3278         hashing, because pmr::string depends on _GLIBCXX_USE_CXX11_ABI==1.
3279         * testsuite/21_strings/basic_string/hash/hash.cc
3280         [!_GLIBCXX_USE_CXX11_ABI]: Don't test pmr strings.
3281         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc
3282         [!_GLIBCXX_USE_CXX11_ABI]: Likewise.
3283
3284         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Replace wildcard that matches
3285         wstring::_M_replace_dispatch with more specific patterns.
3286         * include/bits/fs_path.h (path::_S_convert_loc<_InputIterator>):
3287         Create const std::string to avoid redundant call to _S_convert_loc
3288         with non-const pointers.
3289         * include/bits/locale_conv.h (__do_str_codecvt): Use if-constexpr to
3290         avoid unnecessary basic_string::assign instantiations.
3291
3292         * include/std/memory (__uses_alloc_args): Add string-literal to
3293         static_assert, to match the one in __uses_alloc.
3294         [__cpp_concepts] (_Std_pair): Use C++2a syntax for concept.
3295         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: Check
3296         for recursive uses-allocator construction of nested pairs.
3297         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc:: Add
3298         comment.
3299
3300 2019-04-26  Jakub Jelinek  <jakub@redhat.com>
3301
3302         * config/abi/post/s390x-linux-gnu/32/baseline_symbols.txt: Update.
3303         * config/abi/post/s390-linux-gnu/baseline_symbols.txt: Update.
3304         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
3305         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
3306
3307         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
3308         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
3309         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
3310         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
3311         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
3312         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
3313         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
3314
3315 2019-04-25  Jonathan Wakely  <jwakely@redhat.com>
3316
3317         PR libstdc++/90239
3318         * doc/xml/manual/status_cxx2020.xml: Amend P0591R4 status.
3319         * include/std/scoped_allocator [__cplusplus > 201703L]
3320         (scoped_allocator_adaptor::construct): Define in terms of
3321         uses_allocator_construction_args, as per P0591R4.
3322         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc: New test.
3323         * testsuite/util/testsuite_allocator.h: Remove name of unused
3324         parameter.
3325
3326 2019-04-24  Jonathan Wakely  <jwakely@redhat.com>
3327
3328         * doc/xml/manual/status_cxx2017.xml: Document P0024R2 status.
3329         * doc/html/*: Regenerate.
3330
3331         * include/bits/fs_path.h (operator<, operator<=, operator>)
3332         (operator>=, operator==, operator!=): Make hidden friends, as per
3333         LWG 3065.
3334         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Fix
3335         string type in test.
3336         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
3337
3338         * include/std/any (any::any(ValueType&&)): Use __and_v.
3339         * include/std/numeric (midpoint(T, T, T), midpoint(T*, T*, T*)):
3340         Likewise.
3341
3342         * include/std/tuple (apply): Use remove_reference_t instead of decay_t
3343         as per P0777R1.
3344         * include/std/type_traits (__result_of_memfun): Use remove_reference
3345         instead of __remove_cvref_t and remove redundant is_same check.
3346         (__inv_unwrap): Use __remove_cvref_t instead of decay_t.
3347
3348         * include/experimental/string_view (basic_string_view::pointer)
3349         (basic_string_view::reference): Fix to refer to non-const value_type.
3350         * include/bits/basic_string.h (basic_string): Use __sv_check and
3351         __sv_limit instead of basic_string_view::_M_check and
3352         basic_string_view::_M_limit.
3353         * include/std/string_view (__sv_check, __sv_limit): New
3354         helper functions to replace basic_string_view::_M_check and
3355         basic_string_view::_M_limit.
3356         (basic_string_view): Add static assertions to enforce ill-formed
3357         requirement for traits_type::char_type from P1148R0, and to enforce
3358         required properties of char-like types.
3359         (basic_string_view::pointer, basic_string_view::reference): Fix to
3360         refer to non-const value_type.
3361         (basic_string_view::operator[], basic_string_view::at)
3362         (basic_string_view::front, basic_string_view::back)
3363         (basic_string_view::data): Use const_reference and const_pointer
3364         typedefs for return types.
3365         (basic_string_view::_M_check, basic_string_view::_M_limit): Remove.
3366         (hash<wstring_view>): Fix argument_type typedef.
3367         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
3368         char/1.cc: Fix expected return type of basic_string_view::data().
3369         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
3370         wchar_t/1.cc: Likewise.
3371         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
3372         char/1.cc: Likewise.
3373         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
3374         wchar_t/1.cc: Likewise.
3375         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
3376         New test.
3377         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
3378         Check reference and pointer typedefs.
3379         * testsuite/experimental/string_view/requirements/typedefs.cc:
3380         Likewise.
3381         * testsuite/experimental/string_view/modifiers/remove_prefix/char/1.cc:
3382         Fix expected return type of basic_string_view::data().
3383         * testsuite/experimental/string_view/modifiers/remove_prefix/wchar_t/
3384         1.cc: Likewise.
3385         * testsuite/experimental/string_view/modifiers/remove_suffix/char/1.cc:
3386         Likewise.
3387         * testsuite/experimental/string_view/modifiers/remove_suffix/wchar_t/
3388         1.cc: Likewise.
3389
3390         PR libstdc++/90220
3391         * include/std/any (__any_caster): Use remove_cv_t instead of decay_t.
3392         Avoid a runtime check for types that can never be stored in std::any.
3393         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
3394         array types.
3395
3396         PR libstdc++/90220 (partial)
3397         * include/std/any (any_cast<T>(any*), any_cast<T>(const any*)): Do
3398         not attempt ill-formed static_cast to pointers to non-object types.
3399         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
3400         function types.
3401
3402         * testsuite/20_util/variant/run.cc: Catch exception by reference to
3403         prevent -Wcatch-value warning.
3404
3405         * include/std/variant (__variant_construct): Use template parameter
3406         type instead of equivalent decltype-specifier.
3407         (_Move_ctor_base<false, Types...>::_Move_ctor_base(_Move_ctor_base&&)):
3408         Replace forward with move.
3409         (_Move_ctor_base<false, Types...>::_M_destructive_move)
3410         (_Move_ctor_base<false, Types...>::_M_destructive_copy)
3411         (_Move_ctor_base<true, Types...>::_M_destructive_move)
3412         (_Move_ctor_base<true, Types...>::_M_destructive_copy): Only set the
3413         index after construction succeeds.
3414         (_Copy_assign_base<false, Types...>::operator=): Remove redundant
3415         if-constexpr checks that are always true. Use __remove_cvref_t instead
3416         of remove_reference so that is_nothrow_move_constructible check
3417         doesn't use a const rvalue parameter. In the potentially-throwing case
3418         construct a temporary and move assign it, as per LWG 2904.
3419         (_Move_assign_base<false, Types...>::operator=): Remove redundant
3420         if-constexpr checks that are always true. Use emplace as per LWG 2904.
3421         (variant::operator=(T&&)): Only use emplace conditionally, otherwise
3422         construct a temporary and move assign from it, as per LWG 2904.
3423         * testsuite/20_util/variant/exception_safety.cc: Check that
3424         assignment operators have strong exception safety guarantee.
3425
3426 2019-04-23  Thomas Rodgers <trodgers@redhat.com>
3427
3428         Document PSTL linker flags
3429
3430         * doc/xml/manual/using.xml: Add PSTL linker flags to table 3.1.
3431
3432 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
3433
3434         * include/std/variant (__detail::__variant::_Traits): Make
3435         _S_trivial_copy_assign depend on _S_trivial_copy_ctor and make
3436         _S_trivial_move_assign depend on _S_trivial_move_ctor, as per
3437         P0602R4.
3438         (__detail::__variant::_Copy_assign_alias): Only depend on
3439         _S_trivial_copy_assign, which subsumes _S_trivial_copy_ctor now.
3440         * testsuite/20_util/variant/compile.cc: Correct checks for trivial
3441         move assignment operators.
3442
3443         PR libstdc++/90165
3444         * include/std/variant (variant::__not_self): New helper for the
3445         is_same_v<remove_cvref_t<T>, variant>==false constraints.
3446         (variant::__to_type_impl): Remove.
3447         (variant::__to_type): Add default argument to check pack size, instead
3448         of using __to_type_impl.
3449         (variant::__accepted_type): Add default argument using __not_self.
3450         (variant::__is_in_place_tag, variant::__not_in_place_tag): New helpers
3451         for variant(T&&) constructor constraint.
3452         (variant::variant(T&&)): Use __not_in_place_tag in constraints.
3453         Extract __accepted_type into a named template parameter for reuse in
3454         other constraints and in the exception specification.
3455         (variant::variant(in_place_type_t<T>, Args&&...))
3456         (variant::variant(in_place_type_t<T>, initializer_list<U>, Args&&...))
3457         (variant::variant(in_place_index_t<T>, Args&&...))
3458         (variant::variant(in_place_index_t<T>, initializer_list<U>, Args&&...))
3459         (variant::operator=T&&)): Remove redundant && from trait arguments.
3460         * testsuite/20_util/variant/compile.cc: Check variant(T&&) constructor
3461         isn't used for in_place_type or in_place_index arguments.
3462
3463         * include/std/type_traits (unwrap_reference_t): Define for C++2a.
3464         (unwrap_ref_decay): Remove inheritance from unwrap_reference.
3465         * testsuite/20_util/unwrap_reference/1.cc: Adjust test to use alias.
3466
3467 2019-04-23  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
3468             Bernd Edlinger  <bernd.edlinger@hotmail.de>
3469             Jakub Jelinek  <jakub@redhat.com>
3470
3471         PR target/89093
3472         * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Add
3473         general-regs-only target attribute for ARM.
3474
3475 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
3476
3477         PR libstdc++/87431
3478         * include/bits/basic_string.h (_Never_valueless_alt): Make partial
3479         specialization also depend on is_nothrow_move_constructible.
3480         * include/std/variant (__detail::__variant::__never_valueless()):
3481         Only true if the variant would have a move assignment operator.
3482         (__detail::__variant::_Variant_storage<false, T...>::_M_valid()):
3483         Check __never_valueless<T...>().
3484         (variant::emplace): Only perform non-throwing move assignments
3485         for never-valueless alternatives if the variant has a move assignment
3486         operator.
3487         * testsuite/20_util/variant/compile.cc: Check that never-valueless
3488         types can be emplaced into non-assignable variants.
3489         * testsuite/20_util/variant/run.cc: Check that never-valueless types
3490         don't get copied when emplaced into non-assignable variants.
3491
3492         * include/std/variant (__detail::__variant::__ref_cast): Remove
3493         unused function.
3494         (__detail::__variant::_Uninitialized::_M_get)
3495         (__detail::__variant::__get)
3496         (__gen_vtable_impl::__element_by_index_or_cookie): Add noexcept.
3497
3498 2019-04-21  Iain Sandoe  <iain@sandoe.co.uk>
3499
3500         * testsuite/17_intro/headers/c++1998/charset.cc: Skip for Darwin8
3501         to Darwin10.
3502         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
3503         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
3504         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
3505         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
3506
3507 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
3508
3509         Delegate PSTL configuration to pstl/pstl_config.h
3510
3511         * include/bits/c++config: Remove explicit PSTL configuration
3512         macros and use definitions from <pstl/pstl_config.h>.
3513
3514 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
3515
3516         Cleanup algorithm implementations
3517         * include/pstl/glue_algorithm_impl.h (stable_sort): Forward
3518         execution policy.
3519         (mismatch): Forward execution policy.
3520         (equal): Qualify call to std::equal().
3521         (partial_sort): Forward execution policy.
3522         (inplace_merge): Forward execution policy.
3523
3524 2019-04-19  Thomas Rodgers <trodgers@redhat.com>
3525
3526         Improve implementation of parallel equal()
3527         * include/pstl/algorithm_impl.h
3528         (__internal::__brick_equal): use "4 iterator" version of
3529         std::equal().
3530         (__internal::__brick_equal): use simd for random access
3531         iterators on unsequenced execution policies.
3532         (__internal::__pattern_equal): add "4 iterator" version
3533         (__internal::__pattern_equal): dispatch to simd __brick_equal
3534         for vector-only execution policies.
3535         (__internal::__pattern_equal): dispatch to __parallel_or for
3536         parallel execution policies.
3537         * include/pstl/glue_algorithm_impl.h
3538         (std::equal): dispatch to "4 iterator" version of
3539         __internal::__pattern_equal().
3540
3541 2019-04-17  Jonathan Wakely  <jwakely@redhat.com>
3542
3543         PR libstdc++/90105
3544         * include/bits/forward_list.h (operator==): Do not use operator!= to
3545         compare elements.
3546         (forward_list<T, A>::sort(Comp)): When elements are equal take the one
3547         earlier in the list, so that sort is stable.
3548         * testsuite/23_containers/forward_list/operations/90105.cc: New test.
3549         * testsuite/23_containers/forward_list/comparable.cc: Test with
3550         types that meet the minimum EqualityComparable and LessThanComparable
3551         requirements. Remove irrelevant comment.
3552
3553         * include/std/variant (__detail::__variant::_Traits::_S_copy_assign):
3554         Do not depend on whether all alternative types are move constructible.
3555         (__detail::__variant::_Copy_assign_base::operator=): Remove cv-quals
3556         from the operand when deciding whether to perform the assignment.
3557         * testsuite/20_util/variant/compile.cc (DeletedMoves): Define type
3558         with deleted move constructor and deleted move assignment operator.
3559         (default_ctor, copy_ctor, move_ctor, copy_assign, move_assign): Check
3560         behaviour of variants with DeletedMoves as an alternative.
3561         * testsuite/20_util/variant/run.cc (DeletedMoves): Define same type.
3562         (move_ctor, move_assign): Check that moving a variant with a
3563         DeletedMoves alternative falls back to copying instead of moving.
3564
3565         * testsuite/20_util/variant/compile.cc: Remove empty string literals
3566         from static_assert declarations.
3567
3568         * testsuite/20_util/variant/compile.cc (MoveCtorOnly): Fix type to
3569         actually match its name.
3570         (MoveCtorAndSwapOnly): Define new type that adds swap to MoveCtorOnly.
3571         (test_swap()): Fix result for MoveCtorOnly and check
3572         MoveCtorAndSwapOnly.
3573
3574         * include/std/optional (optional::value_or(U&&) &&): Add missing
3575         constexpr specifier.
3576         * testsuite/20_util/optional/constexpr/observers/4.cc: Check value_or
3577         for disengaged optionals and rvalue optionals.
3578         * testsuite/20_util/optional/observers/4.cc: Likewise.
3579
3580 2019-04-12  Thomas Rodgers  <trodgers@redhat.com>
3581
3582         * include/pstl/algorithm_impl.h: Uglify identfiers.
3583         * include/pstl/numeric_impl.h:  Uglify identfiers.
3584         * include/pstl/parallel_backend_tbb.h: Uglify identfiers.
3585
3586 2019-04-11  Thomas Rodgers  <trodgers@redhat.com>
3587
3588         * include/bits/c++config:
3589         Add definition for __PSTL_ASSERT.
3590         Add definition for __PSTL_ASSERT_MSG.
3591         * include/pstl/algorithm_impl.h: Replace use of assert().
3592         * include/pstl/numeric_impl.h: Replace use of assert().
3593         * include/pstl/parallel_backend_tbb.h:
3594         Replace use of assert().
3595         Replace use of __TBB_ASSERT().
3596         * include/pstl/parallel_backend_utils.h: Replace use of assert().
3597
3598 2019-04-11  Jonathan Wakely  <jwakely@redhat.com>
3599
3600         PR libstdc++/90046
3601         * src/c++17/memory_resource.cc
3602         (monotonic_buffer_resource::_Chunk::allocate): Increase alignment if
3603         needed to allow placing a _Chunk at the end of the buffer.
3604         (monotonic_buffer_resource::_M_new_buffer): Remove static_assert.
3605
3606 2019-04-10  Jonathan Wakely  <jwakely@redhat.com>
3607
3608         * doc/xml/faq.xml: Add information about emergency EH pool.
3609         * doc/xml/manual/debug.xml: Update list of memory debugging tools.
3610         Move outdated information on mt_allocator to a separate section.
3611         * doc/xml/manual/evolution.xml: Clarify that GLIBCXX_FORCE_NEW
3612         doesn't affect the default allocator.
3613
3614         * testsuite/lib/libstdc++.exp (check_v3_target_parallel_mode): Fix
3615         typo.
3616
3617         PR libstdc++/89851
3618         * testsuite/20_util/variant/89851.cc: New test.
3619
3620 2019-04-09  Jonathan Wakely  <jwakely@redhat.com>
3621
3622         * include/std/variant: Adjust whitespace. Add comments.
3623         (_Multi_array): Leave primary template undefined.
3624         (_Multi_array<_Tp>): Define partial specialization for base case of
3625         recursion.
3626         (__gen_vtable_impl, __gen_vtable): Remove redundant && from type
3627         which is always a reference.
3628         (__gen_vtable::_S_apply()): Remove function, inline body into
3629         default member initializer.
3630         * testsuite/20_util/variant/visit.cc: Test with noncopyable types.
3631
3632         * include/std/variant (__variant_idx_cookie): Add member type.
3633         (__visitor_result_type): Remove.
3634         (__do_visit): Use invoke_result instead of __visitor_result_type.
3635         * testsuite/20_util/variant/visit.cc: New test.
3636
3637         PR libstdc++/90008
3638         * include/std/variant (_VARIANT_RELATION_FUNCTION_TEMPLATE): Remove
3639         unused capture.
3640         * testsuite/20_util/variant/90008.cc: New test.
3641
3642 2019-04-09  Thomas Rodgers  <trodgers@redhat.com>
3643
3644         * include/pstl/algorithm_impl.h: Add namespace qualification.
3645         * include/pstl/execution_defs.h: Add namespace qualification.
3646         * include/pstl/execution_impl.h: Add namespace qualification.
3647         * include/pstl/numeric_impl.h: Add namespace qualification.
3648         * include/pstl/parallel_backend_tbb.h: Add namespace qualification.
3649         * include/pstl/unseq_backend_simd.h: Add namespace qualification.
3650         * include/pstl/parallel_backend_utils.h: Include <cassert>.
3651
3652 2019-04-08  Ville Voutilainen  <ville.voutilainen@gmail.com>
3653
3654         Fix visit<R> for variant.
3655         * include/std/variant (__do_visit): Add a template parameter
3656         for enforcing same return types for visit.
3657         (__gen_vtable_impl): Likewise.
3658         (_S_apply_single_alt): Adjust.
3659         (__visit_invoke_impl): New. Handle casting to void.
3660         (__do_visit_invoke): New. Enforces same return types.
3661         (__do_visit_invoke_r): New. Converts return types.
3662         (__visit_invoke): Adjust.
3663         (__gen_vtable):  Add a template parameter for enforcing
3664         same return types for visit.
3665         * testsuite/20_util/variant/visit_r.cc: Add a test for a visitor with
3666         different return types.
3667         * testsuite/20_util/variant/visit_neg.cc: New. Ensures that
3668         visitors with different return types don't accidentally
3669         compile with regular visitation.
3670
3671 2019-04-08  Christophe Lyon  <christophe.lyon@linaro.org>
3672
3673         * testsuite/27_io/filesystem/iterators/caching.cc: Add
3674         dg-require-filesystem-ts.
3675
3676 2019-04-05  Jonathan Wakely  <jwakely@redhat.com>
3677
3678         * doc/xml/manual/status_cxx2020.xml: Update status.
3679         * include/std/variant (visit<R>): Define for C++2a (P0655R1).
3680         * testsuite/20_util/variant/visit_r.cc: New test.
3681
3682         * include/bits/fs_dir.h (directory_iterator::operator*)
3683         (directory_iterator::operator->): Add noexcept.
3684         (operator==, operator!=): Replace namespace-scope equality operators
3685         for directory iterators with hidden friends.
3686
3687         PR libstdc++/89986
3688         * config/abi/pre/gnu.ver: Add missing exports.
3689         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Test
3690         increment member.
3691
3692         * config/abi/pre/gnu.ver: Export new symbols.
3693         * include/bits/fs_dir.h (recursive_directory_iterator::options())
3694         (recursive_directory_iterator::recursion_pending())
3695         (recursive_directory_iterator::disable_recursion_pending()): Remove
3696         inline definitions. Make noexcept.
3697         (recursive_directory_iterator::depth())
3698         (recursive_directory_iterator::operator*())
3699         (recursive_directory_iterator::operator->()): Make noexcept.
3700         (recursive_directory_iterator::_M_options)
3701         (recursive_directory_iterator::_M_pending): Remove data members.
3702         * src/c++17/fs_path.cc (_Dir_stack): Add constructor and data members.
3703         (recursive_directory_iterator::recursive_directory_iterator): Remove
3704         ctor-initializer. Use new constructor for _Dir_stack.
3705         (recursive_directory_iterator::options())
3706         (recursive_directory_iterator::recursion_pending())
3707         (recursive_directory_iterator::disable_recursion_pending()): Add
3708         non-inline definitions.
3709         (recursive_directory_iterator::depth()): Make noexcept.
3710         (recursive_directory_iterator::increment(error_code&))
3711         (recursive_directory_iterator::pop(error_code&)): Adjust to new
3712         location of options and recursion_pending members.
3713         * testsuite/27_io/filesystem/iterators/recursion_pending.cc: New test.
3714         * testsuite/util/testsuite_fs.h (__gnu_test::scoped_file): Add
3715         user-declared move constructor and assignment operator, to make the
3716         type move-only.
3717
3718         * src/c++17/fs_dir.cc (_Dir::advance(bool, error_code&)): Handle
3719         d_type == DT_UNKNOWN immediately.
3720         (_Dir::should_recurse(bool, error_code&)): Remove file_type::unknown
3721         handling here.
3722         * testsuite/27_io/filesystem/iterators/caching.cc: New test.
3723
3724         * include/bits/fs_path.h (path::operator=(path&&)): Check for self
3725         assignment.
3726         * src/c++17/fs_path.cc (path::operator=(const path&)): Likewise.
3727         * testsuite/27_io/filesystem/path/assign/copy.cc: Test self
3728         assignment.
3729
3730         PR libstdc++/87431 (again)
3731         * include/bits/basic_string.h (__variant::_Never_valueless_alt):
3732         Define partial specialization for basic_string.
3733         * include/bits/shared_ptr.h (_Never_valueless_alt): Likewise for
3734         shared_ptr and weak_ptr.
3735         * include/bits/std_function.h (_Never_valueless_alt): Likewise for
3736         function.
3737         * include/bits/stl_vector.h (_Never_valueless_alt): Likewise for
3738         vector.
3739         * include/bits/unique_ptr.h (_Never_valueless_alt): Likewise for
3740         unique_ptr.
3741         * include/debug/vector (_Never_valueless_alt): Likewise for debug
3742         vector.
3743         * include/std/any (_Never_valueless_alt): Define explicit
3744         specialization for any.
3745         * include/std/variant (_Never_valueless_alt): Define primary template.
3746         (__never_valueless): Use _Never_valueless_alt instead of
3747         is_trivially_copyable.
3748         (variant::emplace<N>(Args&&...)): Add special case for non-throwing
3749         initializations to avoid try-catch overhead. Add special case for
3750         scalars produced by potentially-throwing conversions. Use
3751         _Never_valueless_alt instead of is_trivially_copyable for the
3752         remaining strong exception-safety cases.
3753         (variant::emplace<N>(initializer_list<U>, Args&&...)): Likewise.
3754         * testsuite/20_util/variant/87431.cc: Run both test functions.
3755         * testsuite/20_util/variant/exception_safety.cc: New test.
3756         * testsuite/20_util/variant/run.cc: Use pmr::string instead of string,
3757         so the variant becomes valueless.
3758
3759 2019-04-03  Jonathan Wakely  <jwakely@redhat.com>
3760
3761         PR libstdc++/85184
3762         * include/std/variant (_Copy_assign_base, _Move_assign_base, variant):
3763         Remove assertions.
3764         (variant::emplace<_Tp>): Return result of emplace<N> directly.
3765
3766         * include/std/string (__hash_string_base): New class template defining
3767         operator() for hashing strings.
3768         (hash<pmr::string>, hash<pmr::u8string>, hash<pmr::u16string>)
3769         (hash<pmr::u32string>, hash<pmr::wstring>): Define for C++17.
3770         * testsuite/21_strings/basic_string/hash/hash.cc: New test.
3771         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc: New test.
3772
3773 2019-04-01  Ville Voutilainen  <ville.voutilainen@gmail.com>
3774
3775         Use single-visitation in variant assignment and swap and relops.
3776         Also use indices instead of types when checking whether
3777         variants hold the same thing.
3778         * include/std/variant (__do_visit): Add a template parameter
3779         for index visitation, invoke with indices if index visitation
3780         is used.
3781         (__variant_idx_cookie): New.
3782         (__visit_with_index): Likewise.
3783         (_Copy_assign_base::operator=): Do single-visitation with
3784         an index visitor.
3785         (_Move_assign_base::operator=): Likewise.
3786         (_Extra_visit_slot_needed): Adjust.
3787         (__visit_invoke): Call with indices if it's an index visitor.
3788         (relops): Do single-visitation with an index visitor.
3789         (swap): Likewise.
3790         (__visitor_result_type): New.
3791
3792 2019-03-30  Eric Botcazou  <ebotcazou@adacore.com>
3793
3794         * src/c++17/fs_ops.cc (fs::permissions): Use std::errc::not_supported.
3795
3796 2019-03-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
3797
3798         Don't revisit a variant we are already visiting.
3799         * include/std/variant (__variant_construct_single): New.
3800         (__variant_construct): Use it.
3801         (_M_destructive_move): Likewise.
3802         (_M_destructive_copy): Likewise.
3803         (_Copy_assign_base::operator=): Adjust.
3804         (_Move_assign_base::operator=): Likewise.
3805         (swap): Likewise.
3806
3807 2019-03-26  Jonathan Wakely  <jwakely@redhat.com>
3808
3809         PR libstdc++/85965
3810         * include/bits/hashtable.h (_Hashtable): Move static assertions to
3811         destructor so they are not evaluated until the _Key type is complete.
3812         * include/bits/stl_tree.h (_Rb_tree): Likewise.
3813         * testsuite/23_containers/set/85965.cc: New test.
3814         * testsuite/23_containers/unordered_set/85965.cc: New test.
3815         * testsuite/23_containers/map/48101_neg.cc: Replace "here" errors
3816         with regexp matching the corresponding _Rb_tree specialization.
3817         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
3818         * testsuite/23_containers/multiset/48101_neg.cc: Remove "here" error.
3819         * testsuite/23_containers/set/48101_neg.cc: Likewise.
3820         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
3821         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
3822         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
3823         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
3824
3825 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
3826
3827         PR libstdc++/89825
3828         Fix based on a suggestion by Antony Polukhin.
3829         * include/std/variant (__never_valueless): New.
3830         (_M_valid): Use it.
3831         (_Extra_visit_slot_needed): New.
3832         (_Multi_array): Use it.
3833         (_S_apply_all_alts): Likewise.
3834
3835 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
3836
3837         PR libstdc++/89824
3838         Fix based on a suggestion by Antony Polukhin.
3839         * include/std/variant (__gen_vtable): Don't reserve an
3840         additional table slot, _Multi_array already does that.
3841
3842 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
3843
3844         PR libstdc++/89816
3845         Fix based on a suggestion by Antony Polukhin.
3846         * include/std/variant (__variant_construct): Capture a pointer
3847         to the storage and visit just one variant.
3848
3849 2019-03-22  Jonathan Wakely  <jwakely@redhat.com>
3850
3851         * doc/xml/manual/backwards_compatibility.xml: Remove link to
3852         Doxygen-generated pages with unstable URL.
3853         * doc/xml/manual/concurrency_extensions.xml: Likewise.
3854         * doc/xml/manual/extensions.xml: Likewise.
3855         * doc/xml/manual/parallel_mode.xml: Likewise.
3856         * doc/xml/manual/support.xml: Likewise.
3857
3858         * include/bits/stl_algobase.h (__lg): Do arithmetic on type int to
3859         avoid -Wconversion warnings.
3860
3861 2019-03-21  Thomas Rodgers  <trodgers@redhat.com>
3862
3863         * include/Makefile.am (std_header): Add ${std_srcdir}/execution.
3864         (pstl_srcdir, pstl_builddir, pstl_headers): New variables.
3865         (allstamped): Add stamp-pstl.
3866         (install-headers): Add ptsl_builddir.
3867         * include/Makefile.in: Regenerate.
3868         * include/bits/c++config: Add pstl configuration.
3869         * include/pstl/LICENSE.txt: New file.
3870         * include/pstl/algorithm_fwd.h: New file.
3871         * include/pstl/algorithm_impl.h: New file.
3872         * include/pstl/execution_defs.h: New file.
3873         * include/pstl/execution_impl.h: New file.
3874         * include/pstl/glue_algorithm_defs.h: New file.
3875         * include/pstl/glue_algorithm_impl.h: New file.
3876         * include/pstl/glue_execution_defs.h: New file.
3877         * include/pstl/glue_memory_defs.h: New file.
3878         * include/pstl/glue_memory_impl.h: New file.
3879         * include/pstl/glue_numeric_defs.h: New file.
3880         * include/pstl/glue_numeric_impl.h: New file.
3881         * include/pstl/memory_impl.h: New file.
3882         * include/pstl/numeric_fwd.h: New file.
3883         * include/pstl/numeric_impl.h: New file.
3884         * include/pstl/parallel_backend.h: New file.
3885         * include/pstl/parallel_backend_tbb.h: New file.
3886         * include/pstl/parallel_backend_utils.h: New file.
3887         * include/pstl/parallel_impl.h: New file.
3888         * include/pstl/pstl_config.h: New file.
3889         * include/pstl/unseq_backend_simd.h: New file.
3890         * include/pstl/utils.h: New file.
3891         * include/std/algorithm: Include parallel algorithm implementations.
3892         * include/std/execution: New file.
3893         * include/std/memory: Include parallel algorithm implementations.
3894         * include/std/numeric: Include parallel algorithm implementations.
3895         * include/std/version: Add parallel algorithms feature test macro.
3896         * testsuite/util/pstl/pstl_test_config.h: New file.
3897         * testsuite/util/pstl/test_utils.h: New file.
3898         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
3899         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
3900         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
3901         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
3902         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
3903         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
3904         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
3905         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
3906         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
3907         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
3908         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
3909         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
3910         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
3911         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
3912         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
3913         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
3914         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
3915         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
3916         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
3917         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
3918         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
3919         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
3920         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
3921         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
3922         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
3923         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
3924         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
3925         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
3926         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
3927         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
3928         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
3929         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
3930         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
3931         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
3932         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
3933         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
3934         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
3935         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
3936         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
3937         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
3938         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
3939         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
3940         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
3941         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
3942         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
3943         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
3944         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
3945         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
3946         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
3947         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
3948         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
3949         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
3950         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
3951         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
3952         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
3953         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
3954         * testsuite/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
3955         * testsuite/testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
3956         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
3957         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
3958         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
3959         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
3960         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
3961         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
3962         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
3963         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
3964         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
3965         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
3966         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
3967         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
3968         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
3969         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
3970         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
3971         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
3972         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
3973         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
3974         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
3975         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
3976         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
3977         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
3978         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
3979         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
3980         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
3981         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
3982         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
3983         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
3984         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
3985         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
3986         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
3987         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
3988         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
3989         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
3990         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
3991         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
3992         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
3993         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
3994         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
3995         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
3996         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
3997         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
3998         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
3999         * testsuite/testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
4000         * testsuite/testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
4001         * testsuite/testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
4002         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
4003         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
4004
4005 2019-03-21  Jonathan Wakely  <jwakely@redhat.com>
4006
4007         * include/c_compatibility/math.h [!__STDCPP_WANT_MATH_SPEC_FUNCS__]
4008         (assoc_laguerre, assoc_laguerref, assoc_laguerrel, assoc_legendre)
4009         (assoc_legendref, assoc_legendrel, beta, betaf, betal, comp_ellint_1)
4010         (comp_ellint_1f, comp_ellint_1l, comp_ellint_2, comp_ellint_2f)
4011         (comp_ellint_2l, comp_ellint_3, comp_ellint_3f, comp_ellint_3l)
4012         (cyl_bessel_i, cyl_bessel_if, cyl_bessel_il, cyl_bessel_j)
4013         (cyl_bessel_jf, cyl_bessel_jl, cyl_bessel_k, cyl_bessel_kf)
4014         (cyl_bessel_kl, cyl_neumann, cyl_neumannf, cyl_neumannl, ellint_1)
4015         (ellint_1f, ellint_1l, ellint_2, ellint_2f, ellint_2l, ellint_3)
4016         (ellint_3f, ellint_3l, expint, expintf, expintl, hermite, hermitef)
4017         (hermitel, laguerre, laguerref, laguerrel, legendre, legendref)
4018         (legendrel, riemann_zeta, riemann_zetaf, riemann_zetal, sph_bessel)
4019         (sph_besself, sph_bessell, sph_legendre, sph_legendref, sph_legendrel)
4020         (sph_neumann, sph_neumannf, sph_neumannl): Only add using-declarations
4021         when the special functions IS is enabled, not for C++17.
4022         * testsuite/26_numerics/headers/cmath/functions_global_c++17.cc:
4023         Replace with ...
4024         * testsuite/26_numerics/headers/cmath/functions_global.cc: New test,
4025         without checks for special functions in C++17.
4026         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
4027         New test.
4028
4029         PR libstdc++/88066
4030         * include/backward/hash_map: Use <> for includes not "".
4031         * include/backward/hash_set: Likewise.
4032         * include/backward/strstream: Likewise.
4033         * include/tr1/bessel_function.tcc: Likewise.
4034         * include/tr1/exp_integral.tcc: Likewise.
4035         * include/tr1/legendre_function.tcc: Likewise.
4036         * include/tr1/modified_bessel_func.tcc: Likewise.
4037         * include/tr1/riemann_zeta.tcc: Likewise.
4038
4039 2019-03-19  Jonathan Wakely  <jwakely@redhat.com>
4040
4041         * doc/xml/manual/allocator.xml: Link to table documenting evolution
4042         of extension allocators.
4043         * doc/xml/manual/evolution.xml: Use angle brackets for header names.
4044         Document new headers in 7.2, 8.1 and 9.1 releases.
4045         * doc/xml/manual/using.xml: Adjust link target for new_allocator.
4046         * doc/html/*: Regenerate.
4047
4048 2019-03-12  John David Anglin  <dave.anglin@bell.net>
4049
4050         PR libstdc++/89461
4051         * testsuite/lib/libstdc++.exp: Locate libatomic.
4052         * testsuite/lib/dg-options.exp (add_options_for_libatomic): New.
4053         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc: Add
4054         libatomic options.
4055         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc: Likewise.
4056         * testsuite/experimental/net/timer/waitable/cons.cc: Likewise.
4057         * testsuite/experimental/net/timer/waitable/dest.cc: Likewise.
4058         * testsuite/experimental/net/timer/waitable/ops.cc: Likewise.
4059
4060 2019-03-11  Jonathan Wakely  <jwakely@redhat.com>
4061
4062         PR libstdc++/89460
4063         * configure.ac: Check for sockatmark.
4064         * crossconfig.m4: Check for sockatmark.
4065         * config.h.in: Regenerate.
4066         * configure: Regenerate.
4067         * include/experimental/internet (address_v4::_S_hton): Rename
4068         overloaded functions to _S_hton_16 and _S_ntoh_16.
4069         (address_v4::_S_ntoh): Rename to _S_ntoh_16 and _S_ntoh_32.
4070         (basic_endpoint): Adjust calls to _S_hton and _S_ntoh.
4071         * include/experimental/socket (basic_socket::at_mark): Check
4072         _GLIBCXX_HAVE_SOCKATMARK.
4073
4074         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc: Use
4075         const variables instead of macros.
4076
4077         PR libstdc++/89629
4078         * libsupc++/hash_bytes.cc [__SIZEOF_SIZE_T__ == 8] (_Hash_bytes):
4079         Use correct type for len_aligned.
4080         * testsuite/20_util/hash/89629.cc: New test.
4081
4082 2019-03-11  Jakub Jelinek  <jakub@redhat.com>
4083
4084         PR libstdc++/89641
4085         * include/std/atomic (atomic<T>::store, atomic<T>::load,
4086         atomic<T>::exchange, atomic<T>::compare_exchange_weak,
4087         atomic<T>::compare_exchange_strong): Cast __m or __s and __f to int.
4088         * include/bits/atomic_base.h (__atomic_base<T>::operator++,
4089         __atomic_base<T>::operator--, __atomic_base<T>::operator+=,
4090         __atomic_base<T>::operator-=, __atomic_base<T>::operator&=,
4091         __atomic_base<T>::operator|=, __atomic_base<T>::operator^=,
4092         __atomic_base<T*>::operator++, __atomic_base<T*>::operator--,
4093         __atomic_base<T*>::operator+=, __atomic_base<T*>::operator-=): Cast
4094         memory_order_seq_cst to int.
4095
4096 2019-03-08  Jonathan Wakely  <jwakely@redhat.com>
4097
4098         * doc/xml/manual/using.xml: Use link element instead of xref.
4099         * doc/html/*: Regenerate.
4100
4101         * include/bits/fs_path.h (path::format): Add fixed underlying type.
4102
4103 2019-03-08  François Dumont  <fdumont@gcc.gnu.org>
4104
4105         PR libstdc++/89477
4106         * include/debug/map.h (map): Use _RequireNotAllocator to constrain
4107         parameters in deduction guides.
4108         * include/debug/multimap.h (multimap): Likewise.
4109         * include/debug/set.h (multimap): Likewise.
4110         * include/debug/multiset.h (multimap): Likewise.
4111         * include/debug/unordered_map (unordered_map): Likewise.
4112         (unordered_multimap): Likewise.
4113         * include/debug/unordered_set (unordered_set): Likewise.
4114         (unordered_multiset): Likewise.
4115
4116         PR libstdc++/89608
4117         * include/debug/unordered_map (unordered_map<>::_M_check_rehashed):
4118         Invalidate all iterators in case of rehash.
4119         (unordered_multimap<>::_M_check_rehashed): Likewise.
4120         * include/debug/unordered_set
4121         (unordered_set<>::_M_check_rehashed): Likewise.
4122         (unordered_multiset<>::_M_check_rehashed): Likewise.
4123         * testsuite/23_containers/unordered_set/debug/89608_neg.cc: New.
4124
4125 2019-03-07  Andreas Schwab  <schwab@suse.de>
4126
4127         * config/abi/post/riscv64-linux-gnu: New directory.
4128         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: New file.
4129
4130 2019-03-07  Jonathan Wakely  <jwakely@redhat.com>
4131
4132         * testsuite/20_util/function_objects/bind_front/1.cc: Change from
4133         compile test to run. Fix typo.
4134
4135         * doc/xml/manual/status_cxx2020.xml: Update C++20 status.
4136         * doc/html/*: Regenerate.
4137
4138         P0356R5 Simplified partial function application
4139         * include/std/functional [C++20] (_Bind_front, _Bind_front_t): Define
4140         helpers for bind_front.
4141         (bind_front, __cpp_lib_bind_front): Define.
4142         * testsuite/20_util/function_objects/bind_front/1.cc: New test.
4143
4144 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
4145
4146         * include/std/type_traits (__cpp_lib_bounded_array_traits): Define.
4147         * include/std/version (__cpp_lib_bounded_array_traits): Likewise.
4148         * testsuite/20_util/is_bounded_array/value.cc: Check for macro.
4149         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
4150
4151 2019-03-06  Edward Smith-Rowland  <3dw4rd@verizon.net>
4152
4153         PR libstdc++/86655 - std::assoc_legendre should not constrain
4154         the value of m (or x).
4155         * include/tr1/legendre_function.tcc (__assoc_legendre_p,
4156         __sph_legendre): If degree > order Don't throw, return 0.
4157         (__legendre_p, __assoc_legendre_p): Don't constrain x either.
4158         * testsuite/special_functions/02_assoc_legendre/pr86655.cc: New test.
4159         * testsuite/special_functions/20_sph_legendre/pr86655.cc: New test.
4160         * testsuite/tr1/5_numerical_facilities/special_functions/
4161         02_assoc_legendre/pr86655.cc: New test.
4162         * testsuite/tr1/5_numerical_facilities/special_functions/
4163         22_sph_legendre/pr86655.cc: New test.
4164
4165 2019-03-06  Ville Voutilainen  <ville.voutilainen@gmail.com>
4166
4167         Rewrite variant.
4168         Also PR libstdc++/85517
4169         * include/std/variant (__do_visit): New.
4170         (__variant_cast): Likewise.
4171         (__variant_cookie): Likewise.
4172         (__erased_*): Remove.
4173         (_Variant_storage::_S_vtable): Likewise.
4174         (_Variant_storage::__M_reset_impl): Adjust to use __do_visit.
4175         (_Variant_storage::__M_reset): Adjust.
4176         (__variant_construct): New.
4177         (_Copy_ctor_base(const _Copy_ctor_base&)): Adjust to use
4178         __variant_construct.
4179         (_Move_ctor_base(_Move_ctor_base&&)): Likewise.
4180         (_Move_ctor_base::__M_destructive_copy): New.
4181         (_Move_ctor_base::__M_destructive_move): Adjust to use
4182         __variant_construct.
4183         (_Copy_assign_base::operator=): Adjust to use __do_visit.
4184         (_Copy_assign_alias): Adjust to check both copy assignment
4185         and copy construction for triviality.
4186         (_Move_assign_base::operator=): Adjust to use __do_visit.
4187         (_Multi_array): Add support for visitors that accept and return
4188         a __variant_cookie.
4189         (__gen_vtable_impl::_S_apply_all_alts): Likewise.
4190         (__gen_vtable_impl::_S_apply_single_alt): Likewise.
4191         (__gen_vtable_impl::__element_by_index_or_cookie): New. Generate
4192         a __variant_cookie temporary for a variant that is valueless and..
4193         (__gen_vtable_impl::__visit_invoke): ..adjust here.
4194         (__gen_vtable::_Array_type): Conditionally make space for
4195         the __variant_cookie visitor case.
4196         (__variant_construct_by_index): New.
4197         (get_if): Adjust to use std::addressof.
4198         (relops): Adjust to use __do_visit.
4199         (variant): Add __variant_cast and __variant_construct_by_index
4200         as friends.
4201         (variant::emplace): Use _M_reset() and __variant_construct_by_index
4202         instead of self-destruction.
4203         (variant::swap): Adjust to use __do_visit.
4204         (visit): Reimplement in terms of __do_visit.
4205         (__variant_hash_call_base_impl::operator()): Adjust to use __do_visit.
4206         * testsuite/20_util/variant/compile.cc: Adjust.
4207         * testsuite/20_util/variant/run.cc: Likewise.
4208
4209 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
4210
4211         * include/bits/c++config.h (_cpp_lib_char8_t): Add L suffix to
4212         constant.
4213         * testsuite/experimental/feat-char8_t.cc: Likewise.
4214
4215          * include/std/type_traits [C++20] (is_bounded_array)
4216          (is_unbounded_array, is_bounded_array_v, is_unbounded_array_v):
4217          Define.
4218          * testsuite/20_util/is_bounded_array/requirements/
4219          explicit_instantiation.cc: New test.
4220          * testsuite/20_util/is_bounded_array/requirements/typedefs.cc: New
4221          test.
4222          * testsuite/20_util/is_bounded_array/value.cc: New test.
4223          * testsuite/20_util/is_unbounded_array/requirements/
4224          explicit_instantiation.cc: New test.
4225          * testsuite/20_util/is_unbounded_array/requirements/typedefs.cc: New
4226          * test.
4227          * testsuite/20_util/is_unbounded_array/value.cc: New test.
4228
4229         * include/bits/ptr_traits.h [C++20] (pointer_traits<T*>::pointer_to):
4230         Add constexpr.
4231         * testsuite/20_util/pointer_traits/pointer_to_constexpr.cc: New test.
4232
4233 2019-03-05  Jonathan Wakely  <jwakely@redhat.com>
4234
4235         * include/c_compatibility/math.h [C++20] (lerp): Add using
4236         declaration.
4237         * include/c_global/cmath [C++20] (__cpp_lib_interpolate): Define.
4238         (__lerp): Define function template to implement lerp.
4239         (lerp(float, float, float), lerp(double, double, double))
4240         (lerp(long double, long double, long double)): Define for C++20.
4241         * include/std/numeric [C++20] (__cpp_lib_interpolate): Define.
4242         (midpoint(T, T), midpoint(T*, T*)): Define.
4243         * include/std::version [C++20] (__cpp_lib_interpolate): Define.
4244         * testsuite/26_numerics/lerp.cc: New test.
4245         * testsuite/26_numerics/midpoint/floating.cc: New test.
4246         * testsuite/26_numerics/midpoint/integral.cc: New test.
4247         * testsuite/26_numerics/midpoint/pointer.cc: New test.
4248
4249 2019-03-04  Edward Smith-Rowland  <3dw4rd@verizon.net>
4250
4251         PR libstdc++/88996 Implement P0439R0
4252         Make std::memory_order a scoped enumeration.
4253         * include/bits/atomic_base.h: For C++20 make memory_order a scoped enum,
4254         add variables for the old enumerators.  Adjust calls.
4255         * testsuite/29_atomics/headers/atomic/types_std_c++2a.cc: New test.
4256         * testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc: New test.
4257
4258 2019-03-04  Jonathan Wakely  <jwakely@redhat.com>
4259
4260         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Remove bogus dg-do
4261         directive.
4262
4263         * include/std/memory_resource (polymorphic_allocator): Add default
4264         template argument for C++20.
4265         (polymorphic_allocator::allocate_bytes)
4266         (polymorphic_allocator::deallocate_bytes)
4267         (polymorphic_allocator::allocate_object)
4268         (polymorphic_allocator::deallocate_object)
4269         (polymorphic_allocator::new_object)
4270         (polymorphic_allocator::delete_object): New member functions for
4271         C++20.
4272         * testsuite/20_util/polymorphic_allocator/allocate_object.cc: New
4273         test.
4274
4275 2019-03-03  Jonathan Wakely  <jwakely@redhat.com>
4276
4277         PR libstdc++/89562
4278         * src/filesystem/ops-common.h (do_copy_file): Open files in binary
4279         mode for mingw.
4280
4281 2019-03-01  Jonathan Wakely  <jwakely@redhat.com>
4282
4283         * testsuite/util/testsuite_allocator.h (__gnu_test::memory_resource)
4284         [!__cpp_sized_deallocation]: Do not pass size to operator delete.
4285
4286         * include/std/memory (uses_allocator_construction_args): New set of
4287         overloaded functions.
4288         (make_obj_using_allocator, uninitialized_construct_using_allocator):
4289         New functions.
4290         * include/std/memory_resource (polymorphic_allocator::construct)
4291         [__cplusplus > 201703l]: Replace all overloads with a single function
4292         using uses_allocator_construction_args.
4293         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: New
4294         test.
4295         * testsuite/20_util/uses_allocator/make_obj.cc: New test.
4296
4297 2019-02-27  Jonathan Wakely  <jwakely@redhat.com>
4298
4299         PR libstdc++/89466
4300         * acinclude.m4 (GLIBCXX_CONFIGURE_DOCBOOK): Reorder check for local
4301         stylesheet directories before check for xsltproc. Try to use
4302         xmlcatalog to find local stylesheet directory before trying hardcoded
4303         paths. Add path used by suse to hardcoded paths. Adjust xsltproc
4304         check to look for the same stylesheet as doc/Makefile.am uses. Don't
4305         use xsltproc if xmlcatalog fails to find a local stylesheet.
4306         * configure.ac: Check for xmlcatalog.
4307         * Makefile.in: Regenerate.
4308         * configure: Likewise.
4309         * doc/Makefile.in: Likewise.
4310         * include/Makefile.in: Likewise.
4311         * libsupc++/Makefile.in: Likewise.
4312         * po/Makefile.in: Likewise.
4313         * python/Makefile.in: Likewise.
4314         * src/Makefile.in: Likewise.
4315         * src/c++11/Makefile.in: Likewise.
4316         * src/c++17/Makefile.in: Likewise.
4317         * src/c++98/Makefile.in: Likewise.
4318         * src/filesystem/Makefile.in: Likewise.
4319         * testsuite/Makefile.in: Likewise.
4320
4321 2019-02-26  Jonathan Wakely  <jwakely@redhat.com>
4322
4323         PR libstdc++/89477
4324         * include/bits/alloc_traits.h (_RequireNotAllocator): New helper for
4325         container deduction guides.
4326         * include/bits/hashtable.h (_RequireNotAllocatorOrIntegral): Likewise.
4327         * include/bits/stl_map.h (map): Use _RequireNotAllocator to constrain
4328         parameters in deduction guides.
4329         * include/bits/stl_multimap.h (multimap): Likewise.
4330         * include/bits/stl_multiset.h (multiset): Likewise.
4331         * include/bits/stl_queue.h (queue, priority_queue): Likewise.
4332         * include/bits/stl_set.h (set): Likewise.
4333         * include/bits/stl_stack.h (stack): Likewise.
4334         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
4335         use _RequireNotAllocator and _RequireNotAllocatorOrIntegral to
4336         constrain parameters in deduction guides.
4337         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
4338         Likewise.
4339         * testsuite/23_containers/map/cons/deduction.cc: Test additional
4340         deduction cases.
4341         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
4342         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
4343         * testsuite/23_containers/unordered_map/cons/deduction.cc: Likewise.
4344         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
4345         Likewise.
4346         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
4347         Likewise.
4348         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
4349
4350         PR libstdc++/89416
4351         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Change
4352         to class template and partial specialization using void_t.
4353         (__is_copy_insertable, __is_move_insertable): Adjust base class.
4354
4355 2019-02-24  Jonathan Wakely  <jwakely@redhat.com>
4356
4357         PR libstdc++/89416
4358         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Make
4359         copy and move members public.
4360
4361 2019-02-23  Jonathan Wakely  <jwakely@redhat.com>
4362
4363         * include/std/type_traits (__underlying_type_impl): New helper to
4364         make underlying_type SFINAE-friendly.
4365         (underlying_type): Derive from __underlying_type_impl.
4366         * testsuite/20_util/underlying_type/requirements/typedefs-3.cc: New
4367         test.
4368
4369         PR libstdc++/89446
4370         * include/bits/char_traits.h (__constant_char_array): Check index is
4371         in range before dereferencing.
4372         (char_traits<char>::compare, char_traits<char>::find)
4373         (char_traits<char8_t>::compare, char_traits<char8_t>::find): Return
4374         immediately if n is zero.
4375         (char_traits<wchar_t>::compare, char_traits<wchar_t>::find): Likewise.
4376         Remove workarounds for PR 67026.
4377         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
4378         New test.
4379         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
4380         New test.
4381
4382 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
4383
4384         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Adjust.
4385         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
4386
4387 2019-02-22  Jakub Jelinek  <jakub@redhat.com>
4388
4389         PR libstdc++/89402
4390         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Change return
4391         type to std::size_t and argument to type to long double.
4392
4393 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
4394
4395         * configure.host (abi_baseline_pair): Adjust for SPARC64/Linux.
4396         * config/abi/post/sparc64-linux-gnu: New directory.
4397         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: New file.
4398         * config/abi/post/sparc64-linux-gnu/32: New directory.
4399         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: New file.
4400
4401 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
4402
4403         * testsuite/29_atomics/headers/atomic/types_std_c++20.cc: New test.
4404         * testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc: New
4405         test.
4406
4407 2019-02-22  Tom Honermann  <tom@honermann.net>
4408
4409         * python/libstdcxx/v6/printers.py (register_type_printers): Add type
4410         printers for u8string and u8string_view.
4411
4412 2019-02-22  Tom Honermann  <tom@honermann.net>
4413
4414         * testsuite/18_support/byte/ops.cc: Validate
4415         std::to_integer<char8_t>, std::to_integer<char16_t>, and
4416         std::to_integer<char32_t>.
4417         * testsuite/18_support/numeric_limits/dr559.cc: Validate
4418         std::numeric_limits<char8_t>.
4419         * testsuite/18_support/numeric_limits/lowest.cc: Validate
4420         std::numeric_limits<char8_t>::lowest().
4421         * testsuite/18_support/numeric_limits/max_digits10.cc: Validate
4422         std::numeric_limits<char8_t>::max_digits10.
4423         * testsuite/18_support/type_info/fundamental.cc: Validate
4424         typeinfo for char8_t.
4425         * testsuite/20_util/from_chars/1_c++20_neg.cc: New test, validating
4426         std::from_chars with char8_t.
4427         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
4428         Validate explicit instantiation of std::hash<char8_t>.
4429         * testsuite/20_util/is_integral/value.cc: Validate
4430         std::is_integral<char8_t>.
4431         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
4432         Validate std::make_signed<char8_t>.
4433         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
4434         Validate u8string construction from char8_t sources.
4435         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc: Validate
4436         std::pmr::u8string.
4437         * testsuite/21_strings/basic_string_view/operations/compare/
4438         char/70483.cc: Validate substr operations on u8string_view.
4439         * testsuite/21_strings/basic_string_view/typedefs.cc: Validate that
4440         the u8string_view typedef is defined.
4441         * testsuite/21_strings/char_traits/requirements/
4442         constexpr_functions.cc: Validate char_traits<char8_t> constexpr
4443         member functions.
4444         * testsuite/21_strings/char_traits/requirements/
4445         constexpr_functions_c++17.cc: Validate char_traits<char8_t> C++17
4446         constexpr member functions.
4447         * testsuite/21_strings/headers/string/types_std_c++0x.cc: Validate
4448         that the u8string typedef is defined.
4449         * testsuite/22_locale/locale/cons/unicode.cc: Validate the presence
4450         of the std::codecvt<char16_t, char8_t, std::mbstate_t> and
4451         std::codecvt<char32_t, char8_t, std::mbstate_t> facets.
4452         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Update line
4453         numbers.
4454         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
4455         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
4456         Likewise.
4457         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
4458         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
4459         Validate std::atomic<char8_t>::is_always_lock_free
4460         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
4461         Update line numbers.
4462         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
4463         Likewise.
4464         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
4465         Likewise.
4466         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
4467         Validate std::experimental::pmr::u8string.
4468         * testsuite/experimental/string_view/typedefs.cc: Validate that the
4469         u8string_view typedef is defined.
4470         * testsuite/util/testsuite_common_types.h: Add char8_t, char16_t and
4471         char32_t to the typelists.
4472
4473 2019-02-22  Tom Honermann  <tom@honermann.net>
4474
4475         * include/ext/typelist.h: Constrain a partial specialization of
4476         typelist::detail::append_ to only match chain<T1,T2>.
4477
4478 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
4479
4480         PR libstdc++/89416
4481         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Replace
4482         class template with class. Replace move and copy member types with
4483         member alias templates, so they are only instantiated when needed.
4484         (__is_copy_insertable, __is_move_insertable): Adjust base class.
4485         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: Enable
4486         test for C++11/14/17 as well.
4487         * testsuite/23_containers/vector/modifiers/push_back/89416.cc: New
4488         test.
4489
4490 2019-02-20  Jakub Jelinek  <jakub@redhat.com>
4491
4492         PR libstdc++/89402
4493         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Add
4494         _GLIBCXX_PURE to the alias declaration.
4495
4496 2019-02-19  Jonathan Wakely  <jwakely@redhat.com>
4497
4498         * testsuite/21_strings/basic_string/literals/types.cc
4499         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string type for u8 literal.
4500         * testsuite/21_strings/basic_string/literals/values.cc
4501         [_GLIBCXX_USE_CHAR8_T]: Likewise.
4502         * testsuite/22_locale/codecvt/char16_t.cc: Adjust for u8 literals
4503         potentially having different type.
4504         * testsuite/22_locale/codecvt/char32_t.cc: Likewise.
4505         * testsuite/22_locale/codecvt/codecvt_utf8/79980.cc: Cast u8 literal
4506         to char.
4507         * testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: Likewise.
4508         * testsuite/22_locale/codecvt/utf8.cc: Likewise.
4509         * testsuite/22_locale/conversions/string/2.cc: Remove u8 prefix from
4510         string literals only using basic character set.
4511         * testsuite/22_locale/conversions/string/3.cc: Likewise. Cast other
4512         u8 literals to char.
4513         * testsuite/29_atomics/headers/atomic/macros.cc [_GLIBCXX_USE_CHAR8_T]:
4514         Test ATOMIC_CHAR8_T_LOCK_FREE.
4515         Add missing #error to ATOMIC_CHAR16_T_LOCK_FREE test.
4516         * testsuite/29_atomics/headers/atomic/types_std_c++0x.cc
4517         [_GLIBCXX_USE_CHAR8_T]: Check for std::atomic_char8_t.
4518         * testsuite/experimental/string_view/literals/types.cc
4519         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string_view type for u8
4520         literal.
4521         * testsuite/experimental/string_view/literals/values.cc
4522         [_GLIBCXX_USE_CHAR8_T]: Likewise.
4523
4524 2019-02-19  Tom Honermann  <tom@honermann.net>
4525
4526         * testsuite/18_support/numeric_limits/char8_t.cc: New test cloned
4527         from char16_32_t.cc; validates numeric_limits<char8_t>.
4528         * testsuite/21_strings/basic_string/literals/types-char8_t.cc: New
4529         test cloned from types.cc; validates operator""s for char8_t
4530         returns u8string.
4531         * testsuite/21_strings/basic_string/literals/values-char8_t.cc: New
4532         test cloned from values.cc; validates construction and comparison
4533         of u8string values.
4534         * testsuite/21_strings/basic_string/requirements/
4535         /explicit_instantiation/char8_t/1.cc: New test cloned from
4536         char16_t/1.cc; validates explicit instantiation of
4537         basic_string<char8_t>.
4538         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
4539         New test cloned from types.cc; validates operator""sv for char8_t
4540         returns u8string_view.
4541         * testsuite/21_strings/basic_string_view/literals/
4542         values-char8_t.cc: New test cloned from values.cc; validates
4543         construction and comparison of u8string_view values.
4544         * testsuite/21_strings/basic_string_view/requirements/
4545         explicit_instantiation/char8_t/1.cc: New test cloned from
4546         char16_t/1.cc; validates explicit instantiation of
4547         basic_string_view<char8_t>.
4548         * testsuite/21_strings/char_traits/requirements/char8_t/65049.cc:
4549         New test cloned from char16_t/65049.cc; validates that
4550         char_traits<char8_t> is not vulnerable to the concerns in PR65049.
4551         * testsuite/21_strings/char_traits/requirements/char8_t/
4552         typedefs.cc: New test cloned from char16_t/typedefs.cc; validates
4553         that char_traits<char8_t> member typedefs are present and correct.
4554         * testsuite/21_strings/char_traits/requirements/
4555         explicit_instantiation/char8_t/1.cc: New test cloned from
4556         char16_t/1.cc; validates explicit instantiation of
4557         char_traits<char8_t>.
4558         * testsuite/22_locale/codecvt/char16_t-char8_t.cc: New test cloned
4559         from char16_t.cc: validates
4560         codecvt<char16_t, char8_t, mbstate_t>.
4561         * testsuite/22_locale/codecvt/char32_t-char8_t.cc: New test cloned
4562         from char32_t.cc: validates
4563         codecvt<char32_t, char8_t, mbstate_t>.
4564         * testsuite/22_locale/codecvt/utf8-char8_t.cc: New test cloned from
4565         utf8.cc; validates codecvt<char16_t, char8_t, std::mbstate_t> and
4566         codecvt<char32_t, char8_t, std::mbstate_t>.
4567         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: New
4568         test cloned from string.cc; validates filesystem::path construction
4569         from char8_t input.
4570         * testsuite/experimental/feat-char8_t.cc: New test; validates that
4571         the __cpp_lib_char8_t feature test macro is defined with the
4572         correct value.
4573         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
4574         New test cloned from string.cc; validates filesystem::path
4575         construction from char8_t input.
4576         * testsuite/experimental/string_view/literals/types-char8_t.cc: New
4577         test cloned from types.cc; validates operator""sv for char8_t
4578         returns u8string_view.
4579         * testsuite/experimental/string_view/literals/values-char8_t.cc:
4580         New test cloned from values.cc; validates construction and
4581         comparison of u8string_view values.
4582         * testsuite/experimental/string_view/requirements/
4583         explicit_instantiation/char8_t/1.cc: New test cloned from
4584         char16_t/1.cc; validates explicit instantiation of
4585         basic_string_view<char8_t>.
4586         * testsuite/ext/char8_t/atomic-1.cc: New test; validates that
4587         ATOMIC_CHAR8_T_LOCK_FREE is not defined if char8_t support is not
4588         enabled.
4589
4590 2019-02-19  Tom Honermann  <tom@honermann.net>
4591
4592         P0482R5 char8_t: Standard library support
4593         * config/abi/pre/gnu-versioned-namespace.ver (CXXABI_2.0): Add
4594         typeinfo symbols for char8_t.
4595         * config/abi/pre/gnu.ver: Add CXXABI_1.3.12.
4596         (GLIBCXX_3.4.26): Add symbols for specializations of
4597         numeric_limits and codecvt that involve char8_t.
4598         (CXXABI_1.3.12): Add typeinfo symbols for char8_t.
4599         * include/bits/atomic_base.h: Add atomic_char8_t.
4600         * include/bits/basic_string.h: Add std::hash<u8string> and
4601         operator""s(const char8_t*, size_t).
4602         * include/bits/c++config: Define _GLIBCXX_USE_CHAR8_T and
4603         __cpp_lib_char8_t.
4604         * include/bits/char_traits.h: Add char_traits<char8_t>.
4605         * include/bits/codecvt.h: Add
4606         codecvt<char16_t, char8_t, mbstate_t>,
4607         codecvt<char32_t, char8_t, mbstate_t>,
4608         codecvt_byname<char16_t, char8_t, mbstate_t>, and
4609         codecvt_byname<char32_t, char8_t, mbstate_t>.
4610         * include/bits/cpp_type_traits.h: Add __is_integer<char8_t> to
4611         recognize char8_t as an integral type.
4612         * include/bits/fs_path.h: (path::__is_encoded_char): Recognize
4613         char8_t.
4614         (path::u8string): Return std::u8string when char8_t support is
4615         enabled.
4616         (path::generic_u8string): Likewise.
4617         (path::_S_convert): Handle conversion from char8_t input.
4618         (path::_S_str_convert): Likewise.
4619         * include/bits/functional_hash.h: Add hash<char8_t>.
4620         * include/bits/locale_conv.h (__str_codecvt_out): Add overloads for
4621         char8_t.
4622         * include/bits/locale_facets.h (_GLIBCXX_NUM_UNICODE_FACETS): Bump
4623         for new char8_t specializations.
4624         * include/bits/localefwd.h: Add missing declarations of
4625         codecvt<char16_t, char, mbstate_t> and
4626         codecvt<char32_t, char, mbstate_t>.  Add char8_t declarations
4627         codecvt<char16_t, char8_t, mbstate_t> and
4628         codecvt<char32_t, char8_t, mbstate_t>.
4629         * include/bits/postypes.h: Add u8streampos
4630         * include/bits/stringfwd.h: Add declarations of
4631         char_traits<char8_t> and u8string.
4632         * include/c_global/cstddef: Add __byte_operand<char8_t>.
4633         * include/experimental/bits/fs_path.h (path::__is_encoded_char):
4634         Recognize char8_t.
4635         (path::u8string): Return std::u8string when char8_t support is
4636         enabled.
4637         (path::generic_u8string): Likewise.
4638         (path::_S_convert): Handle conversion from char8_t input.
4639         (path::_S_str_convert): Likewise.
4640         * include/experimental/string: Add u8string.
4641         * include/experimental/string_view: Add u8string_view,
4642         hash<experimental::u8string_view>, and
4643         operator""sv(const char8_t*, size_t).
4644         * include/std/atomic: Add atomic<char8_t> and atomic_char8_t.
4645         * include/std/charconv (__is_int_to_chars_type): Recognize char8_t
4646         as a character type.
4647         * include/std/limits: Add numeric_limits<char8_t>.
4648         * include/std/string_view: Add u8string_view,
4649         hash<experimental::u8string_view>, and
4650         operator""sv(const char8_t*, size_t).
4651         * include/std/type_traits: Add __is_integral_helper<char8_t>,
4652         __make_unsigned<char8_t>, and __make_signed<char8_t>.
4653         * libsupc++/atomic_lockfree_defines.h: Define
4654         ATOMIC_CHAR8_T_LOCK_FREE.
4655         * src/c++11/Makefile.am: Compile with -fchar8_t when compiling
4656         codecvt.cc and limits.cc so that char8_t specializations of
4657         numeric_limits and codecvt and emitted.
4658         * src/c++11/Makefile.in: Likewise.
4659         * src/c++11/codecvt.cc: Define members of
4660         codecvt<char16_t, char8_t, mbstate_t>,
4661         codecvt<char32_t, char8_t, mbstate_t>,
4662         codecvt_byname<char16_t, char8_t, mbstate_t>, and
4663         codecvt_byname<char32_t, char8_t, mbstate_t>.
4664         * src/c++11/limits.cc: Define members of
4665         numeric_limits<char8_t>.
4666         * src/c++98/Makefile.am: Compile with -fchar8_t when compiling
4667         locale_init.cc and localename.cc.
4668         * src/c++98/Makefile.in: Likewise.
4669         * src/c++98/locale_init.cc: Add initialization for the
4670         codecvt<char16_t, char8_t, mbstate_t> and
4671         codecvt<char32_t, char8_t, mbstate_t> facets.
4672         * src/c++98/localename.cc: Likewise.
4673         * testsuite/util/testsuite_abi.cc: Validate ABI bump.
4674
4675 2019-02-18  Wilco Dijkstra  <wdijkstr@arm.com>
4676
4677         * 27_io/filesystem/operations/all.cc: Add dg-require-filesystem-ts.
4678         * 27_io/filesystem/operations/resize_file.cc: Likewise.
4679         * 27_io/filesystem/path/generation/normal2.cc: Likewise.
4680
4681 2019-02-14  Jonathan Wakely  <jwakely@redhat.com>
4682
4683         * doc/xml/manual/status_cxx2020.xml: Update P0887R1 status.
4684         * doc/html/*: Regenerate.
4685
4686         * doc/xml/manual/status_cxx2017.xml: Add P0063R3 to status table.
4687         * doc/html/*: Regenerate.
4688
4689         * doc/xml/manual/intro.xml: Document LWG 2586 status.
4690         * include/bits/uses_allocator.h (__uses_alloc): Use const lvalue
4691         allocator type in is_constructible checks.
4692         * testsuite/20_util/scoped_allocator/69293_neg.cc: Adjust dg-error.
4693         * testsuite/20_util/scoped_allocator/dr2586.cc: New test.
4694         * testsuite/20_util/tuple/cons/allocators.cc: Add test using
4695         problematic type from LWG 2586 discussion.
4696         * testsuite/20_util/uses_allocator/69293_neg.cc: Adjust dg-error.
4697         * testsuite/20_util/uses_allocator/cons_neg.cc: Likewise.
4698
4699         * configure.ac: Check for C11 timespec_get function.
4700         * crossconfig.m4 (freebsd, linux, gnu, cygwin, solaris, netbsd)
4701         (openbsd): Likewise
4702         * config.h.in: Regenerate.
4703         * configure: Regenerate.
4704         * include/c_global/ctime (timespec, timespec_get): Add to namespace
4705         std for C++17 and up.
4706
4707         * doc/xml/manual/intro.xml: Document LWG 2537 status.
4708         * include/bits/stl_queue.h
4709         (priority_queue(const Compare&, const Container&, const Alloc&))
4710         (priority_queue(const Compare&, Container&&, const Alloc&)): Call
4711         make_heap.
4712         * testsuite/23_containers/priority_queue/dr2537.cc: New test.
4713
4714         * doc/xml/manual/intro.xml: Document LWG 2566 status.
4715         * include/bits/stl_queue.h (queue, priority_queue): Add static
4716         assertions to enforce LWG 2566 requirement on value_type.
4717         * include/bits/stl_stack.h (stack): Likewise.
4718
4719         PR middle-end/89303
4720         * testsuite/20_util/enable_shared_from_this/89303.cc: New test.
4721
4722         * doc/xml/manual/intro.xml: Document LWG 2735 status.
4723         * include/bits/std_abs.h: Add comment about LWG 2735.
4724         * testsuite/26_numerics/headers/cstdlib/dr2735.cc: New test.
4725
4726 2019-02-13  Jonathan Wakely  <jwakely@redhat.com>
4727
4728         PR libstdc++/89345
4729         * include/std/version [__cpp_impl_destroying_delete]
4730         (__cpp_lib_destroying_delete): Only define for C++2a and later.
4731         * libsupc++/new [__cpp_impl_destroying_delete]
4732         (__cpp_lib_destroying_delete): Likewise.
4733         (destroying_delete_t, destroying_delete): Likewise, but define even
4734         when __cpp_impl_destroying_delete is not defined.
4735         * testsuite/18_support/destroying_delete.cc: New test.
4736
4737 2019-02-11  Jonathan Wakely  <jwakely@redhat.com>
4738
4739         PR libstdc++/89023
4740         * testsuite/17_intro/headers/c++2011/parallel_mode.cc: New test.
4741         * testsuite/17_intro/headers/c++2014/parallel_mode.cc: New test.
4742         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: New test.
4743         * testsuite/28_regex/headers/regex/parallel_mode.cc: Remove.
4744
4745 2019-02-09  Jonathan Wakely  <jwakely@redhat.com>
4746
4747         PR libstdc++/71044
4748         * include/bits/fs_path.h (path::has_root_name)
4749         (path::has_root_directory, path::has_root_path)
4750         (path::has_relative_path, path::has_parent_path)
4751         (path::has_filename, path::has_stem, path::has_extension)
4752         (path::is_absolute, path::is_relative, path::_M_find_extension): Add
4753         noexcept.
4754         * src/c++17/fs_path.cc (path::has_root_name)
4755         (path::has_root_directory, path::has_root_path)
4756         (path::has_relative_path, path::has_parent_path)
4757         (path::has_filename, path::_M_find_extension): Add noexcept.
4758
4759 2019-02-06  Jonathan Wakely  <jwakely@redhat.com>
4760
4761         PR libstdc++/89102 (partial)
4762         * include/std/type_traits (common_type<>): Define.
4763         (common_type<T>): Derive from common_type<T, T>.
4764         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
4765         Test zero-length template argument list.
4766         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
4767         Test additional single argument cases.
4768         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
4769         Adjust expected error.
4770
4771 2019-02-05  Jonathan Wakely  <jwakely@redhat.com>
4772
4773         PR libstdc++/89128
4774         * include/bits/stl_queue.h (queue, priority_queue): Add deduction
4775         guides.
4776         * include/bits/stl_stack.h (stack): Likewise.
4777         * testsuite/23_containers/priority_queue/deduction.cc: New test.
4778         * testsuite/23_containers/queue/deduction.cc: New test.
4779         * testsuite/23_containers/stack/deduction.cc: New test.
4780
4781         PR libstdc++/89194
4782         * include/std/type_traits (__is_convertible_helper)
4783         (__is_convertible_helper<_From, _To, false>): Revert changes to
4784         support is_nothrow_convertible.
4785         (__is_nt_convertible_helper): New helper.
4786         (is_nothrow_convertible): Use __is_nt_convertible_helper.
4787
4788         * testsuite/23_containers/vector/modifiers/push_back/49836.cc: Restore
4789         use of CopyConsOnlyType, but also test DelAnyAssign for completeness.
4790
4791         PR libstdc++/89130
4792         * include/bits/alloc_traits.h (__is_copy_insertable_impl): Rename to
4793         __is_alloc_insertable_impl. Replace single type member with two
4794         members, one for each of copy and move insertable.
4795         (__is_move_insertable): New trait for internal use.
4796         * include/bits/stl_vector.h (vector::_S_nothrow_relocate(true_type))
4797         (vector::_S_nothrow_relocate(true_type)): New functions to
4798         conditionally check if __relocate_a can throw.
4799         (vector::_S_use_relocate()): Dispatch to _S_nothrow_relocate based
4800         on __is_move_insertable.
4801         (vector::_S_do_relocate): New overloaded functions to conditionally
4802         call __relocate_a.
4803         (vector::_S_relocate): New function that dispatches to _S_do_relocate
4804         based on _S_use_relocate.
4805         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
4806         (vector::_M_default_append): Call _S_relocate instead of __relocate_a.
4807         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: New.
4808
4809         PR libstdc++/89090
4810         * include/bits/stl_uninitialized.h (__relocate_a_1): Make unused
4811         parameter unnamed. Add message to static assertion.
4812         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
4813         (vector::_M_default_append): Use _GLIBCXX17_CONSTEXPR for if constexpr
4814         in C++11 code.
4815
4816 2019-02-05  Marc Glisse  <marc.glisse@inria.fr>
4817
4818         PR libstdc++/87106
4819         * include/bits/stl_uninitialized.h (__is_trivially_relocatable):
4820         Rename...
4821         (__is_bitwise_relocatable): ... to this.
4822         (__relocate_a_1): Adapt.
4823         * include/bits/stl_deque.h (__is_trivially_relocatable): Rename...
4824         (__is_bitwise_relocatable): ... to this.
4825
4826 2019-01-30  Jonathan Wakely  <jwakely@redhat.com>
4827
4828         PR libstdc++/89117
4829         * src/c++17/fs_path.cc (path::replace_extension): Erase extension from
4830         final component as well as from _M_pathname. Append the dot using
4831         operator+= instead of only to _M_pathname.
4832         (path::_M_find_extension): Reformat slightly.
4833         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
4834         Add more test cases.
4835
4836 2019-01-30  Ulrich Drepper  <drepper@redhat.com>
4837
4838         * doc/xml/manual/status_cxx2020.xml: Update P0600 entry.
4839
4840 2019-01-29  Jonathan Wakely  <jwakely@redhat.com>
4841
4842         * testsuite/26_numerics/headers/complex/synopsis.cc: Remove incorrect
4843         constexpr specifiers from arg and proj.
4844
4845         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
4846         __shared_ptr instantiations used by gcc4-compatible ABI.
4847
4848         * include/experimental/forward_list (experimental::erase): Qualify
4849         call to erase_if.
4850         * include/experimental/list (experimental::erase): Likewise.
4851         * include/std/forward_list (std::erase): Likewise.
4852         * include/std/list (std::erase): Likewise.
4853
4854         * testsuite/20_util/reference_wrapper/result_type.cc: Disable for
4855         C++2a.
4856         * testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
4857         * testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
4858         * testsuite/20_util/reference_wrapper/typedefs.cc: Likewise.
4859         * testsuite/30_threads/async/54297.cc: Suppress nodiscard warning.
4860         * testsuite/ext/array_allocator/26875.cc: Likewise.
4861         * testsuite/ext/pool_allocator/allocate_chunk.cc: Likewise.
4862         * testsuite/util/replacement_memory_operators.h: Likewise.
4863         * testsuite/util/testsuite_allocator.h: Likewise.
4864
4865         * include/std/memory_resource (__pool_resource::_M_unpooled): Use
4866         normal mode vector, even for debug mode.
4867         * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
4868         Define alias template for normal mode vector.
4869
4870 2019-01-28  Jonathan Wakely  <jwakely@redhat.com>
4871
4872         PR libstdc++/68737
4873         * config/locale/generic/c_locale.h (__convert_from_v)
4874         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
4875         * config/os/hpux/os_defines.h: Define _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
4876         * include/bits/locale_facets.tcc (num_put::_M_insert_float)
4877         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
4878
4879 2019-01-24  Jonathan Wakely  <jwakely@redhat.com>
4880
4881         PR libstdc++/88840
4882         * include/bits/stl_vector.h (vector::__use_relocate): Replace static
4883         data member with static member function _S_use_relocate().
4884         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
4885         (vector::_M_default_append): Use _S_use_relocate() instead of
4886         __use_relocate.
4887
4888         * testsuite/27_io/filesystem/path/compare/strings.cc: Only compare
4889         sign of results.
4890
4891 2019-01-22  Jonathan Wakely  <jwakely@redhat.com>
4892
4893         PR libstdc++/88740
4894         * testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
4895         write to stderr instead of using printf.
4896
4897 2019-01-21  Jakub Jelinek  <jakub@redhat.com>
4898
4899         PR libstdc++/86590
4900         * include/bits/char_traits.h (__constant_string_p,
4901         __constant_char_array_p): Use __builtin_is_constant_evaluated if
4902         available.
4903
4904 2019-01-20  Ulrich Drepper  <drepper@redhat.com>
4905
4906         Implement C++20 P0600r1.
4907         * include/backward/hash_map: Add nodiscard attribute to empty.
4908         * include/backward/hash_set: Likewise.
4909         * backward/hashtable.h: Likewise.
4910         * include/bits/basic_string.h: Likewise.
4911         * include/bits/forward_list.h: Likewise.
4912         * include/bits/hashtable.h: Likewise.
4913         * include/bits/regex.h: Likewise.
4914         * include/bits/stl_deque.h: Likewise.
4915         * include/bits/stl_list.h: Likewise.
4916         * include/bits/stl_map.h: Likewise.
4917         * include/bits/stl_multimap.h: Likewise.
4918         * include/bits/stl_multiset.h: Likewise.
4919         * include/bits/stl_queue.h: Likewise.
4920         * include/bits/stl_set.h: Likewise.
4921         * include/bits/stl_stack.h: Likewise.
4922         * include/bits/stl_tree.h: Likewise.
4923         * include/bits/stl_vector.h: Likewise.
4924         * include/bits/unordered_map.h: Likewise.
4925         * include/bits/unordered_set.h: Likewise.
4926         * include/debug/array: Likewise.
4927         * include/experimental/any: Likewise.
4928         * include/experimental/bits/fs_path.h: Likewise.
4929         * include/experimental/internet: Likewise.
4930         * include/experimental/string_view: Likewise.
4931         * include/ext/pb_ds/detail/bin_search_tree_/info_fn_imps.hpp:
4932         Likewise.
4933         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp:
4934         Likewise.
4935         * include/ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp:
4936         Likewise.
4937         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:
4938         Likewise.
4939         * include/ext/pb_ds/detail/cc_hash_table_map_/info_fn_imps.hpp:
4940         Likewise.
4941         * include/ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp:
4942         Likewise.
4943         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp:
4944         Likewise.
4945         * include/ext/pb_ds/detail/gp_hash_table_map_/info_fn_imps.hpp:
4946         Likewise.
4947         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
4948         info_fn_imps.hpp: Likewise.
4949         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
4950         left_child_next_sibling_heap_.hpp: Likewise.
4951         * include/ext/pb_ds/detail/list_update_map_/info_fn_imps.hpp:
4952         Likewise.
4953         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp:
4954         Likewise.
4955         * include/ext/pb_ds/detail/ov_tree_map_/info_fn_imps.hpp:
4956         Likewise.
4957         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hp:
4958         Likewise.
4959         * include/ext/pb_ds/detail/pat_trie_/info_fn_imps.hpp:
4960         Likewise.
4961         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:
4962         Likewise.
4963         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp:
4964         Likewise.
4965         * include/ext/pb_ds/detail/tree_trace_base.hpp: Likewise.
4966         * include/ext/pb_ds/trie_policy.hpp: Likewise.
4967         * include/ext/rope: Likewise.
4968         * include/ext/slist: Likewise.
4969         * include/ext/vstring.h: Likewise.
4970         * include/profile/array: Likewise.
4971         * include/std/array: Likewise.
4972         * include/tr1/array: Likewise.
4973         * include/tr1/hashtable.h: Likewise.
4974         * include/tr1/regex: Likewise.
4975         * include/tr2/dynamic_bitset: Likewise.
4976         * include/bits/alloc_traits.h: Add nodiscard attribute to
4977         allocate.
4978         * include/experimental/memory_resource: Likewise.
4979         * include/ext/alloc_traits.h: Likewise.
4980         * include/ext/array_allocator.h: Likewise.
4981         * include/ext/bitmap_allocator.h: Likewise.
4982         * include/ext/debug_allocator.h: Likewise.
4983         * include/ext/extptr_allocator.h: Likewise.
4984         * include/ext/mt_allocator.h: Likewise.
4985         * include/ext/new_allocator.h: Likewise.
4986         * include/ext/pool_allocator.h: Likewise.
4987         * include/ext/throw_allocator.h: Likewise.
4988         * include/std/scoped_allocator: Likewise.
4989         * libsupc++/eh_alloc.cc: Likewise.
4990         * include/std/future: Add nodiscard attribute to async.
4991         * libsupc++/new: Add nodiscard attribute to new.
4992
4993 2019-01-18  Jonathan Wakely  <jwakely@redhat.com>
4994
4995         PR libstdc++/87514
4996         PR libstdc++/87520
4997         PR libstdc++/88782
4998         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export new symbol.
4999         * include/bits/shared_ptr.h
5000         (shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...))
5001         (allocate_shared): Change to use new tag type.
5002         * include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_eq):
5003         Declare new member function.
5004         (_Sp_alloc_shared_tag): Define new type.
5005         (_Sp_counted_ptr_inplace): Declare __shared_count<_Lp> as a friend.
5006         (_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Use
5007         _Sp_make_shared_tag::_S_eq to check type_info.
5008         (__shared_count(Ptr, Deleter),__shared_count(Ptr, Deleter, Alloc)):
5009         Constrain to prevent being called with _Sp_alloc_shared_tag.
5010         (__shared_count(_Sp_make_shared_tag, const _Alloc&, Args&&...)):
5011         Replace constructor with ...
5012         (__shared_count(Tp*&, _Sp_alloc_shared_tag<_Alloc>, Args&&...)): Use
5013         reference parameter so address of the new object can be returned to
5014         the caller. Obtain the allocator from the tag type.
5015         (__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Replace
5016         constructor with ...
5017         (__shared_ptr(_Sp_alloc_shared_tag<Alloc>, Args&&...)): Pass _M_ptr
5018         to the __shared_count constructor.
5019         (__allocate_shared): Change to use new tag type.
5020         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq): Define.
5021
5022 2019-01-17  Jonathan Wakely  <jwakely@redhat.com>
5023
5024         * src/c++17/fs_ops.cc
5025         (equivalent(const path&, const path&, error_code&))
5026         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use GetFileInformationByHandle to
5027         compare files instead of relying on incomplete info returned by stat.
5028
5029         PR libstdc++/88884
5030         * src/c++17/fs_ops.cc (absolute(const path&, error_code&)): Do nothing
5031         if the path is already absolute.
5032         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize root-directory.
5033         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Pass error_code to current_path.
5034
5035         PR libstdc++/88881
5036         * src/c++17/fs_ops.cc (canonical(const path&, error_code&))
5037         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize path, to match behaviour
5038         of filesystem::exists.
5039         (create_directories(const path&, error_code&)): Add assertions.
5040         (status(const path&, error_code&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
5041         Add workaround for bug in _wstat for paths with trailing slash.
5042         * testsuite/27_io/filesystem/operations/create_directories.cc: Adjust
5043         for expected behaviour on mingw.
5044         * testsuite/experimental/filesystem/operations/create_directories.cc:
5045         Likewise.
5046         * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Use
5047         "TMP" instead of "TMPDIR" and clean environment before each test. Do
5048         not test permissions on mingw targets.
5049
5050 2019-01-16  Jonathan Wakely  <jwakely@redhat.com>
5051
5052         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
5053         constructors and open members taking wide strings. Fix patterns for
5054         filesystem::path members to match wstring_view parameters. Add
5055         exports for shared_ptr members used by directory iterators.
5056         * src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
5057         error code parameter if the file doesn't exist.
5058         * src/filesystem/ops.cc (remove(const path&, error_code&)):
5059         Likewise.
5060         * testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
5061         values for mingw targets, where "/" is not an absolute path. Do not
5062         test symlinks on mingw targets.
5063         * testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
5064         * testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
5065         on mingw targets.
5066         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
5067         * testsuite/27_io/filesystem/operations/create_directories.cc: Check
5068         that each component of the path is created.
5069         * testsuite/experimental/filesystem/operations/create_directories.cc:
5070         Likewise.
5071         * testsuite/27_io/filesystem/operations/exists.cc: Do not test
5072         permissions on mingw targets.
5073         * testsuite/experimental/filesystem/operations/exists.cc: Likewise.
5074         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
5075         * testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
5076         * testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
5077         mingw targets.
5078         * testsuite/experimental/filesystem/operations/permissions.cc:
5079         Likewise.
5080         * testsuite/27_io/filesystem/operations/remove.cc: Do not test
5081         symlinks or permissions on mingw targets.
5082         * testsuite/experimental/filesystem/operations/remove.cc: Likewise.
5083         * testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
5084         symlinks on mingw targets.
5085         * testsuite/experimental/filesystem/operations/remove_all.cc:
5086         Likewise.
5087         * testsuite/27_io/filesystem/operations/status.cc: Do not test
5088         permissions on mingw targets.
5089         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
5090         test symlinks on mingw targets.
5091         * testsuite/experimental/filesystem/operations/space.cc: Fix test
5092         for mingw targets.
5093
5094 2019-02-14  Ulrich Drepper  <drepper@redhat.com>
5095
5096         PR libstdc++/88738
5097         Warn about unused comparisons of shared_ptr/unique_ptr
5098         * include/bits/c++config [_GLIBCXX_NODISCARD]: Define.
5099         * include/bits/shared_ptr.h: Use it for operator ==, !=,
5100         <, <=, >, >= for shared_ptr.
5101         * include/bits/unique_ptr.h: Likewise for unique_ptr.
5102
5103 2019-01-15  Jonathan Wakely  <jwakely@redhat.com>
5104
5105         * include/bits/shared_ptr_base.h (__cpp_lib_shared_ptr_arrays): Define
5106         as 201611L, because P0497R0 changes are supported.
5107         * include/std/version (__cpp_lib_shared_ptr_arrays): Likewise.
5108
5109         * include/bits/erase_if.h [__cplusplus > 201703L]
5110         (__cpp_lib_erase_if): Only define for C++2a.
5111         * include/std/iterator [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
5112         (__cpp_lib_null_iterators): Define.
5113         * include/std/version [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
5114         (__cpp_lib_null_iterators): Define.
5115         [__cpp_impl_destroying_delete] (__cpp_lib_destroying_delete): Define.
5116
5117         * doc/xml/manual/status_cxx2017.xml: Document P0032R3 and P0307R2
5118         status.
5119         * include/bits/stl_uninitialized.h (__cpp_lib_raw_memory_algorithms):
5120         Define.
5121         * include/std/any (__cpp_lib_any): Define as 201606L, because P0032R3
5122         changes are supported.
5123         * include/std/optional (__cpp_lib_optional): Likewise.
5124         * include/std/variant (__cpp_lib_variant): Likewise.
5125         * include/std/version [!__STRICT_ANSI__]
5126         (__cpp_lib_uncaught_exceptions): Define as long integer.
5127         [__cplusplus >= 201703L] (__cpp_lib_any)
5128         (__cpp_lib_raw_memory_algorithms, __cpp_lib_uncaught_exceptions)
5129         (__cpp_lib_variant): Define for C++17.
5130         [__cplusplus >= 201703L] (__cpp_lib_optional): Update value and define
5131         as long integer.
5132         * libsupc++/exception (__cpp_lib_uncaught_exceptions): Define as long
5133         integer.
5134
5135         * doc/xml/manual/status_cxx2020.xml: Update P1123R0 status.
5136
5137 2019-01-12  Jonathan Wakely  <jwakely@redhat.com>
5138
5139         PR libstdc++/88811
5140         PR libstdc++/83306
5141         * src/filesystem/path.cc: Fix typo. If first path is empty, show []
5142         before second path.
5143         * testsuite/experimental/filesystem/filesystem_error/cons.cc: New
5144         test.
5145
5146 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
5147
5148         * doc/xml/manual/intro.xml: Include new section.
5149         * doc/xml/manual/status_cxx2017.xml: Document more
5150         implementation-defined properties of the library.
5151         * doc/xml/manual/status_cxx2020.xml: Document C++2a status.
5152         * doc/html/*: Regenerate.
5153
5154         * include/bits/refwrap.h [__cplusplus > 201703L]
5155         (_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
5156         (_Reference_wrapper_base_memfun): Do not define for C++2a.
5157         (reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
5158         for C++2a.
5159         (reference_wrapper::operator()): Add static assertion.
5160         * testsuite/20_util/reference_wrapper/incomplete.cc: New test.
5161
5162         * include/std/chrono (duration_values::zero(), duration_values::min())
5163         (duration_values::max()): Add noexcept.
5164         (duration::zero(), duration::min(), duration::max()): Likewise.
5165         (time_point::zero(), time_point::min(), time_point::max()): Likewise.
5166         * testsuite/20_util/duration/requirements/noexcept.cc: New test.
5167         * testsuite/20_util/time_point/requirements/noexcept.cc: New test.
5168
5169         * include/std/version (__cpp_lib_erase_if): Move to C++20 group.
5170
5171 2019-01-11  Jakub Jelinek  <jakub@redhat.com>
5172
5173         * include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
5174         * include/std/version (__cpp_lib_is_constant_evaluated): Define.
5175
5176 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
5177
5178         PR libstdc++/88802
5179         * include/bits/functional_hash.h (hash<nullptr_t>): Define
5180         specialization for C++17 (P0513R0, LWG 2817).
5181         * testsuite/20_util/hash/nullptr.cc: New test.
5182
5183         PR libstdc++/88125
5184         * config/abi/pre/gnu.ver (GLIBCXX_3.4.6): Remove unused duplicate
5185         pattern for std::basic_stringbuf::str().
5186
5187         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
5188         basic_ostream::operator<< patterns.
5189
5190 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
5191
5192         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fix
5193         test failures on targets with 32-bit time_t.
5194
5195         * include/bits/erase_if.h: Define __cpp_lib_erase_if.
5196         * include/std/deque: Likewise.
5197         * include/std/forward_list: Likewise.
5198         * include/std/list: Likewise.
5199         * include/std/string: Likewise.
5200         * include/std/vector: Likewise.
5201         * include/std/version: Likewise.
5202         * testsuite/21_strings/basic_string/erasure.cc: Test macro.
5203         * testsuite/23_containers/deque/erasure.cc: Likewise.
5204         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
5205         * testsuite/23_containers/list/erasure.cc: Likewise.
5206         * testsuite/23_containers/map/erasure.cc: Likewise.
5207         * testsuite/23_containers/set/erasure.cc: Likewise.
5208         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
5209         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
5210         * testsuite/23_containers/vector/erasure.cc: Likewise.
5211
5212         * include/experimental/internet [AI_NUMERICSERV]
5213         (resolver_base::numeric_service): Define conditionally.
5214         * testsuite/experimental/net/internet/resolver/base.cc: Test it
5215         conditionally.
5216         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
5217         Likewise.
5218
5219 2019-01-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
5220             Jonathan Wakely  <jwakely@redhat.com>
5221
5222         Implement LWG 2221
5223         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten patterns.
5224         (GLIBCXX_3.4.26): Add new exports.
5225         * include/Makefile.am: Add ostream-inst.cc. Move string-inst.cc to
5226         correct list of sources.
5227         * include/Makefile.in: Regenerate.
5228         * include/std/ostream (operator<<(nullptr_t)): New member function.
5229         * src/c++17/ostream-inst.cc: New file.
5230         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc: New
5231         test.
5232
5233 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
5234
5235         * testsuite/util/testsuite_fs.h (nonexistent_path): Include name
5236         of the source file containing the caller.
5237         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Remove
5238         directories created by test.
5239         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
5240         Likewise.
5241         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
5242         Likewise.
5243         * testsuite/experimental/filesystem/iterators/
5244         recursive_directory_iterator.cc: Likewise.
5245
5246 2019-01-10  Jakub Jelinek  <jakub@redhat.com>
5247
5248         PR tree-optimization/88775
5249         * include/bits/stl_function.h (greater<_Tp*>::operator(),
5250         less<_Tp*>::operator(), greater_equal<_Tp*>::operator(),
5251         less_equal<_Tp*>::operator()): Use __builtin_is_constant_evaluated
5252         instead of __builtin_constant_p if available.  Don't bother with
5253         the pointer comparison in C++11 and earlier.
5254
5255 2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>
5256
5257         PR other/16615
5258
5259         * include/ext/bitmap_allocator.h: Mechanically replace "can not"
5260         with "cannot".
5261
5262 2019-01-09  Jonathan Wakely  <jwakely@redhat.com>
5263
5264         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix expected output
5265         for filesystem::path. Give variables more distinctive names.
5266
5267         * include/std/optional (_Optional_payload_base::_M_copy_assign): New
5268         member function to perform non-trivial assignment.
5269         (_Optional_payload_base::_M_move_assign): Likewise.
5270         (_Optional_payload<T, true, false, true>::operator=)
5271         (_Optional_payload<T, true, true, false>::operator=)
5272         (_Optional_payload<T, true, false, false>::operator=): Call
5273         _M_copy_assign and/or _M_move_assign to do non-trivial assignments.
5274
5275         PR libstdc++/88204
5276         * testsuite/26_numerics/complex/operators/more_constexpr.cc: Do not
5277         test std::complex<long double> if long double format is IBM128.
5278         * testsuite/26_numerics/complex/requirements/more_constexpr.cc:
5279         Likewise.
5280
5281 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
5282
5283         * testsuite/libstdc++-prettyprinters/compat.cc: Test printer support
5284         for old std::unique_ptr layout.
5285         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix std::variant test
5286         to become valueless. Add filesystem::path tests.
5287
5288         PR libstdc++/87855
5289         * include/std/optional (_Optional_payload_base): New class template
5290         for common code hoisted from _Optional_payload specializations. Use
5291         a template for the union, to allow a partial specialization for
5292         types with non-trivial destructors. Add constructors for in-place
5293         initialization to the union.
5294         (_Optional_payload(bool, const _Optional_payload&)): Use _M_construct
5295         to perform non-trivial copy construction, instead of relying on
5296         non-standard copy elision in a delegating constructor.
5297         (_Optional_payload(bool, _Optional_payload&&)): Likewise for
5298         non-trivial move construction.
5299         (_Optional_payload): Derive from _Optional_payload_base and use it
5300         for everything except the non-trivial assignment operators, which are
5301         defined as needed.
5302         (_Optional_payload<false, C, M>): Derive from the specialization
5303         _Optional_payload<true, false, false> and add a destructor.
5304         (_Optional_base_impl::_M_destruct, _Optional_base_impl::_M_reset):
5305         Forward to corresponding members of _Optional_payload.
5306         (_Optional_base_impl::_M_is_engaged, _Optional_base_impl::_M_get):
5307         Hoist common members from _Optional_base.
5308         (_Optional_base): Make all members and base class public.
5309         (_Optional_base::_M_get, _Optional_base::_M_is_engaged): Move to
5310         _Optional_base_impl.
5311         * python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Add
5312         support for new std::optional layout.
5313         * testsuite/libstdc++-prettyprinters/compat.cc: New test.
5314
5315         PR libstdc++/88066
5316         * include/bits/locale_conv.h: Use <> for includes not "".
5317         * include/ext/random: Likewise.
5318         * include/ext/vstring.h: Likewise.
5319
5320 2019-01-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
5321
5322         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten existing patterns.
5323         (GLIBCXX_3.4.21): Likewise.
5324
5325 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
5326
5327         PR libstdc++/88749
5328         * src/filesystem/ops.cc (last_write_time): Fix preprocessor condition
5329         to match the one that controls whether utimbuf and utime are declared.
5330
5331 2019-01-07  Jonathan Wakely  <jwakely@redhat.com>
5332
5333         PR libstdc++/87787
5334         * include/bits/char_traits.h (char_traits::move): Do not pass null
5335         pointers to memmove.
5336         * include/bits/locale_facets.h
5337         (ctype<char>::widen(const char*, const char*, char*)): Do not
5338         pass null pointers to memcpy.
5339         (ctype<char>::narrow(const char*, const char*, char, char*)):
5340         Likewise.
5341         (ctype<char>::do_widen(const char*, const char*, char*)):
5342         Likewise.
5343         (ctype<char>::do_narrow(const char*, const char*, char, char*)):
5344         Likewise.
5345
5346         * doc/xml/manual/spine.xml: Update copyright years.
5347         * doc/xml/manual/status_cxx2017.xml: Adjust note about -lstdc++fs.
5348         * doc/xml/manual/using.xml: Remove requirement to link with -lstdc++fs
5349         for C++17 filesystem library.
5350         * doc/html/*: Regenerate.
5351
5352         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
5353         * config.h.in: Regenerate.
5354         * config/abi/pre/gnu.ver: Order patterns for filesystem operations
5355         alphabetically and add missing entries for copy_symlink,
5356         hard_link_count, rename, and resize_file.
5357         * configure: Regenerate.
5358         * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
5359         used unconditionally.
5360         * src/filesystem/ops-common.h (__gnu_posix::truncate)
5361         [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
5362         supports truncating to zero length.
5363         * testsuite/27_io/filesystem/operations/all.cc: New test.
5364         * testsuite/27_io/filesystem/operations/resize_file.cc: New test.
5365
5366 2019-01-06  Jonathan Wakely  <jwakely@redhat.com>
5367
5368         PR libstdc++/86756
5369         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and
5370         lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT.
5371         * config.h.in: Regenerate.
5372         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for
5373         remaining std::filesystem types and functions.
5374         * configure: Regenerate.
5375         * src/c++17/Makefile.am: Add C++17 filesystem sources.
5376         * src/c++17/Makefile.in: Regenerate.
5377         * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to
5378         here, and change name of included file.
5379         * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to
5380         here, and change name of included file.
5381         * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change
5382         path to dir-common.h.
5383         * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change
5384         path to ops-common.h. Disable -Wunused-parameter warnings.
5385         (internal_file_clock): Define unconditionally.
5386         [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not
5387         define.
5388         (do_copy_file, do_space): Move definitions to ops.common.h.
5389         (copy, file_size, hard_link_count, last_write_time, space): Only
5390         perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise
5391         report an error.
5392         (last_write_time, read_symlink): Remove unused attributes from
5393         parameters.
5394         * src/filesystem/Makefile.am: Remove C++17 filesystem sources.
5395         * src/filesystem/Makefile.in: Regenerate.
5396         * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc.
5397         * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc.
5398         * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc.
5399         * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc.
5400         * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define
5401         dummy types and functions instead of using #error.
5402         * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error.
5403         * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define
5404         in terms of stat.
5405         [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions.
5406         (do_copy_file, do_space): Move definitions here from std-ops.cc.
5407         * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space
5408         to account for new namespace.
5409         * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove
5410         -lstdc++fs from dg-options.
5411         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise.
5412         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
5413         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
5414         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
5415         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
5416         Likewise.
5417         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
5418         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
5419         Likewise.
5420         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
5421         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
5422         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
5423         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
5424         * testsuite/27_io/filesystem/operations/create_directories.cc:
5425         Likewise.
5426         * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise.
5427         * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise.
5428         * testsuite/27_io/filesystem/operations/current_path.cc: Likewise.
5429         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
5430         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
5431         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
5432         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
5433         * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise.
5434         * testsuite/27_io/filesystem/operations/permissions.cc: Likewise.
5435         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
5436         * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise.
5437         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
5438         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
5439         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
5440         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
5441         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
5442         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
5443         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
5444         Likewise.
5445         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise.
5446
5447
5448         PR libstdc++/86756
5449         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Make various patterns for
5450         typeinfo and vtables less greedy.
5451         (GLIBCXX_3.4.26): Export symbols for std::filesystem::path.
5452         * src/c++17/Makefile.am: Add fs_path.cc and cow-fs_path.cc.
5453         * src/c++17/Makefile.in: Regenerate.
5454         * src/c++17/cow-fs_path.cc: Move src/filesystem/cow-std-path.cc to
5455         here, and change name of included file.
5456         * src/c++17/fs_path.cc: Move src/filesystem/std-path.cc to here.
5457         * src/filesystem/Makefile.am: Remove std-path.cc and cow-std-path.cc
5458         from sources.
5459         * src/filesystem/Makefile.in: Regenerate.
5460         * src/filesystem/cow-std-path.cc: Move to src/c++17/cow-fs_path.cc.
5461         * src/filesystem/std-path.cc: Move to src/c++17/fs_path.cc.
5462         * testsuite/27_io/filesystem/path/append/path.cc: Remove -lstdc++fs
5463         from dg-options and remove dg-require-filesystem-ts.
5464         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
5465         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
5466         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
5467         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
5468         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
5469         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
5470         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
5471         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
5472         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
5473         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
5474         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
5475         * testsuite/27_io/filesystem/path/construct/default.cc: Likewise.
5476         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
5477         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
5478         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
5479         * testsuite/27_io/filesystem/path/construct/string_view.cc: Likewise.
5480         * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise.
5481         * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise.
5482         * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise.
5483         * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise.
5484         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
5485         Likewise.
5486         * testsuite/27_io/filesystem/path/decompose/root_name.cc: Likewise.
5487         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise.
5488         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
5489         * testsuite/27_io/filesystem/path/generation/normal.cc: Likewise.
5490         * testsuite/27_io/filesystem/path/generation/normal2.cc: Likewise.
5491         * testsuite/27_io/filesystem/path/generation/proximate.cc: Likewise.
5492         * testsuite/27_io/filesystem/path/generation/relative.cc: Likewise.
5493         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Likewise.
5494         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
5495         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
5496         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
5497         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
5498         Likewise.
5499         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
5500         Likewise.
5501         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
5502         Likewise.
5503         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
5504         Likewise.
5505         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
5506         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
5507         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
5508         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise.
5509         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
5510         * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise.
5511         * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise.
5512         * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise.
5513         * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise.
5514         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
5515         Likewise.
5516         * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise.
5517         * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise.
5518         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
5519         * testsuite/27_io/filesystem/path/query/is_absolute.cc: Likewise.
5520         * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.
5521
5522         PR libstdc++/87431
5523         * include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
5524         Check is_trivially_copyable instead of is_scalar.
5525         (variant::emplace<N, Args>(Args&&...)): If construction of the new
5526         contained value can throw and its type is trivially copyable then
5527         construct into a temporary variant and move from it, to provide the
5528         strong exception safety guarantee.
5529         (variant::emplace<N, U, Args>(initializer_list<U>, Args&&...)):
5530         Likewise.
5531         * testsuite/20_util/variant/87431.cc: New test.
5532         * testsuite/20_util/variant/run.cc: Adjust test so that throwing
5533         conversion causes valueless state.
5534
5535         PR libstdc++/88607
5536         * testsuite/17_intro/headers/c++1998/charset.cc: New test.
5537         * testsuite/17_intro/headers/c++2011/charset.cc: New test.
5538         * testsuite/17_intro/headers/c++2014/charset.cc: New test.
5539         * testsuite/17_intro/headers/c++2017/charset.cc: New test.
5540         * testsuite/17_intro/headers/c++2020/charset.cc: New test.
5541
5542 2019-01-05  Jonathan Wakely  <jwakely@redhat.com>
5543
5544         * include/bits/fs_fwd.h (__file_clock): Define new clock.
5545         (file_time_type): Redefine in terms of __file_clock.
5546         * src/filesystem/ops-common.h (file_time): Add FIXME comment about
5547         overflow.
5548         * src/filesystem/std-ops.cc (is_set(perm_options, perm_options)): Give
5549         internal linkage.
5550         (internal_file_lock): New helper type for accessing __file_clock.
5551         (do_copy_file): Use internal_file_lock to convert system time to
5552         file_time_type.
5553         (last_write_time(const path&, error_code&)): Likewise.
5554         (last_write_time(const path&, file_time_type, error_code&)): Likewise.
5555
5556 2019-01-04  Jonathan Wakely  <jwakely@redhat.com>
5557
5558         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make patterns less greedy
5559         for const member functions of std::basic_string.
5560         (GLIBCXX_3.4.26): Export member functions of std::basic_string added
5561         in C++17.
5562         * include/bits/basic_string.h (basic_string(__sv_wrapper, const A&)):
5563         Make non-standard constructor private.
5564         [!_GLIBCXX_USE_CXX11_ABI] (basic_string(__sv_wrapper, const A&)):
5565         Likewise.
5566         * include/bits/basic_string.tcc (std::string, std::wstring): Declare
5567         explicit instantiations for C++17 as well as earlier dialects.
5568         * src/c++17/Makefile.am: Add new source files.
5569         * src/c++17/Makefile.in: Regenerate.
5570         * src/c++17/cow-string-inst.cc: New file defining explicit
5571         instantiations for basic_string member functions added in C++17.
5572         * src/c++17/string-inst.cc: Likewise.
5573
5574         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export allocator-extended
5575         copy/move constructors for old std::basic_string.
5576         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
5577         (basic_string::reference, basic_string::const_reference): Define
5578         as plain references for C++11 and later.
5579         (basic_string::basic_string()): Put constructor body outside
5580         preprocessor conditional groups.
5581         (basic_string::basic_string(basic_string&&)): Move _Alloc_hider
5582         instead of copying it.
5583         (basic_string::basic_string(const basic_string&, const _Alloc&)):
5584         Define.
5585         (basic_string::basic_string(basic_string&&, const _Alloc&)):
5586         Define.
5587         * include/bits/fs_path.h [!_GLIBCXX_USE_CXX11_ABI]: Remove special
5588         cases for old basic_string.
5589         * testsuite/21_strings/basic_string/cons/char/8.cc: Test
5590         allocator-extended constructors unconditionally. Add extra members to
5591         allocator type when using old string ABI.
5592         * testsuite/21_strings/basic_string/allocator/71964.cc: Enable test
5593         for old string ABI.
5594         * testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.
5595
5596         * testsuite/23_containers/list/61347.cc: Avoid spurious failure when
5597         -fno-inline added to test flags.
5598
5599         * testsuite/21_strings/basic_string/requirements/
5600         explicit_instantiation/debug.cc: Remove XFAIL for old ABI.
5601
5602         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
5603         assertion failures with old std::string ABI.
5604
5605         * include/bits/fs_path.h (path::_List::erase): Replace both overloads
5606         with ...
5607         (path::pop_back(), path::_M_erase_from(const_iterator)): New member
5608         functions that will only erase elements at the end.
5609         * src/filesystem/std-path.cc (path::_List::_Impl::pop_back()): Define.
5610         (path::_List::_Impl::_M_erase_from(const_iterator)): Define.
5611         (path::_List::operator=(const _List&)): Use _M_erase_from(p) instead
5612         of erase(p, end()).
5613         (path::_List::pop_back()): Define.
5614         (path::_List::_M_erase_from(const_iterator)): Define.
5615         (path::operator/=(const path&)): Use pop_back to remove last component
5616         and _M_erase_from to remove multiple components.
5617         (path::_M_append(basic_string_view<value_type>)): Likewise.
5618         (path::operator+=(const path&)): Likewise.
5619         (path::_M_concat(basic_string_view<value_type>)): Likewise.
5620         (path::remove_filename()): Likewise.
5621         (path::lexically_normal()): Use _List::_Impl iterators instead of
5622         path::iterator. Use pop_back to remove components from the end. Clear
5623         trailing filename, instead of using erase(const_iterator) to remove
5624         a non-final component.
5625         * testsuite/27_io/filesystem/path/generation/normal.cc: Test
5626         additional cases.
5627         * testsuite/27_io/filesystem/path/generation/normal2.cc: New test.
5628
5629         * src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
5630         incorrect treatment of empty filename after trailing slash.
5631         * testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.
5632
5633         * testsuite/21_strings/basic_string/modifiers/assign/char/
5634         move_assign_optim.cc: Avoid spurious failure when -fno-inline added
5635         to test flags.
5636         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/
5637         move_assign_optim.cc: Likewise.
5638
5639 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
5640             Jakub Jelinek  <jakub@redhat.com>
5641
5642         PR libstdc++/88607
5643         * include/experimental/memory: Replace UTF-8 quote characters.
5644         * include/std/future: Replace UTF-8 "em dash" characters.
5645
5646 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
5647
5648         PR libstdc++/88607
5649         * include/bits/forward_list.h: Replace UTF-8 "ligature fi" character.
5650         * include/debug/forward_list: Likewise.
5651         * include/experimental/bits/shared_ptr.h: Remove UTF-8 "section sign"
5652         character.
5653         * include/experimental/chrono: Likewise.
5654         * include/experimental/functional: Likewise.
5655         * include/experimental/ratio: Likewise.
5656         * include/experimental/system_error: Likewise.
5657         * include/experimental/tuple: Likewise.
5658         * include/experimental/type_traits: Likewise.
5659         * include/parallel/workstealing.h: Replace UTF-8 "en dash" character.
5660         * include/parallel/multiseq_selection.h: Likewise.
5661
5662         PR libstdc++/88681
5663         * config/abi/pre/gnu.ver: Add missing exports.
5664         * testsuite/22_locale/collate_byname/88681.cc: New test.
5665         * testsuite/22_locale/time_get/get/char/88681.cc: New test.
5666         * testsuite/22_locale/time_get/get/wchar_t/88681.cc: New test.
5667
5668 2019-01-02  Jonathan Wakely  <jwakely@redhat.com>
5669
5670         * testsuite/23_containers/map/cons/deduction.cc: Test deduction from
5671         initializer_list<value_type> and from input iterator ranges.
5672         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
5673
5674         * testsuite/experimental/string_view/element_access/char/empty.cc:
5675         Fix year range in copyright header.
5676
5677 2019-01-02  Joel Brobecker  <brobecker@adacore.com>
5678
5679         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
5680         Fix year range in copyright header.
5681
5682 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
5683
5684         Update copyright years.
5685 \f
5686 Copyright (C) 2019 Free Software Foundation, Inc.
5687
5688 Copying and distribution of this file, with or without modification,
5689 are permitted in any medium without royalty provided the copyright
5690 notice and this notice are preserved.