libstdc++-v3/ChangeLog

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