libstdc++-v3/ChangeLog

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