libstdc++-v3/ChangeLog

   1 2019-10-11  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * include/std/type_traits (is_same): Replace partial specialization
   4         by using __is_same_as built-in in primary template.
   5         (is_same_v): Use __is_same_as built-in instead of instantiating the
   6         is_same trait.
   7
   8         PR libstdc++/92059
   9         * include/tr2/dynamic_bitset (__dynamic_bitset_base): Define all
  10         special member functions as defaulted. Add noexcept to most members.
  11         (__dynamic_bitset_base(size_t, unsigned long long, const _Alloc&)):
  12         Mask off unwanted bits in the __val parameter. Avoid undefined left
  13         shifts.
  14         (__dynamic_bitset_base::_M_assign): Remove.
  15         (__dynamic_bitset_base::_M_do_reset): Use std::fill.
  16         (__dynamic_bitset_base::_M_are_all_aux): Avoid integer promotion when
  17         block_type has lower rank than int.
  18         (dynamic_bitset): Add noexcept to most members. Use injected-class-name
  19         in return types and parameter types.
  20         (dynamic_bitset::_M_Nb): Add default member initializer.
  21         (dynamic_bitset(), dynamic_bitset(const dynamic_bitset&)): Define as
  22         defaulted.
  23         (dynamic_bitset(dynamic_bitset&&)): Clear source object after move.
  24         (dynamic_bitset::operator=(const dynamic_bitset&)): Define as
  25         defaulted.
  26         (dynamic_bitset::operator=(dynamic_bitset&&)): Add noexcept-specifier.
  27         Define without using swap, to propagate allocator correctly.
  28         (dynamic_bitset(const char*, const _Alloc&)): Use strlen.
  29         (dynamic_bitset::_M_do_sanitize, dynamic_bitset::_M_do_fill): Use
  30         casts to avoid unwanted integer promotions.
  31         (dynamic_bitset::_M_copy_from_ptr): Rearrange template parameters and
  32         add default template arguments and default argument to simplify usage.
  33         (dynamic_bitset::_M_copy_from_string): Adjust call to _M_copy_from_ptr.
  34         (operator==(const dynamic_bitset&, const dynamic_bitset&))
  35         (operator<(const dynamic_bitset&, const dynamic_bitset&)): Use _M_Nb.
  36         * include/tr2/dynamic_bitset.tcc (dynamic_bitset::_M_copy_from_ptr):
  37         Adjust template parameters to match declaration.
  38         * testsuite/tr2/dynamic_bitset/cmp.cc: New test.
  39         * testsuite/tr2/dynamic_bitset/cons.cc: New test.
  40         * testsuite/tr2/dynamic_bitset/copy.cc: New test.
  41         * testsuite/tr2/dynamic_bitset/move.cc: New test.
  42         * testsuite/tr2/dynamic_bitset/pr92059.cc: New test.
  43
  44         * include/bits/charconv.h (__to_chars_len): Avoid -Wsign-compare
  45         warnings.
  46
  47 2019-10-10  Jonathan Wakely  <jwakely@redhat.com>
  48
  49         PR libstdc++/91057
  50         * src/c++98/locale.cc [_GLIBCXX_LONG_DOUBLE_COMPAT]
  51         (find_ldbl_sync_facet): Fix parameter type and missing return.
  52
  53 2019-10-09  Marek Polacek  <polacek@redhat.com>
  54
  55         PR c++/91364 - P0388R4: Permit conversions to arrays of unknown bound.
  56         PR c++/69531 - DR 1307: Differently bounded array parameters.
  57         PR c++/88128 - DR 330: Qual convs and pointers to arrays of pointers.
  58         * testsuite/23_containers/span/lwg3255.cc: Adjust test to match the
  59         post-P0388R4 behavior.
  60
  61 2019-10-09  Jonathan Wakely  <jwakely@redhat.com>
  62
  63         PR libstdc++/91057
  64         * src/c++98/locale.cc (locale::id::_M_id()) [__GTHREADS]: Use atomic
  65         compare-exchange or double-checked lock to ensure only one thread sets
  66         the _M_index variable.
  67         [_GLIBCXX_LONG_DOUBLE_COMPAT]: Call find_ldbl_sync_facet to detect
  68         facets that share another facet's ID.
  69         [_GLIBCXX_LONG_DOUBLE_COMPAT] (find_ldbl_sync_facet): New function.
  70
  71         PR libstdc++/78552
  72         * src/c++98/locale_init.cc (locale::classic()): Do not construct a new
  73         locale object for every call.
  74         (locale::_S_initialize_once()): Construct C locale here.
  75
  76 2019-10-08  Jonathan Wakely  <jwakely@redhat.com>
  77
  78         * doc/Makefile.am (doc-html-docbook-regenerate): New target.
  79         (${docbook_outdir}/html): Do not create unused 'html/ext' directory.
  80         * doc/Makefile.in: Regenerate.
  81         * doc/xml/manual/documentation_hacking.xml: Document new target.
  82         * doc/html/*: Regenerate.
  83
  84         * doc/xml/manual/allocator.xml: Use archived copy of CUJ article.
  85         * doc/html/*: Regenerate.
  86
  87 2019-10-06  François Dumont  <fdumont@gcc.gnu.org>
  88
  89         * include/bits/stl_algo.h
  90         (__copy_n_a(_IIte, _Size, _OIte)): New.
  91         (__copy_n_a(istreambuf_iterator<>, _Size, _CharT*)): New declaration.
  92         (__copy_n(_IIte, _Size, _OIte, input_iterator_tag)): Adapt to use
  93         latter.
  94         * include/bits/streambuf_iterator.h (istreambuf_iterator<>): Declare
  95         std::__copy_n_a friend.
  96         (__copy_n_a(istreambuf_iterator<>, _Size, _CharT*)): New.
  97         * testsuite/25_algorithms/copy_n/istreambuf_iterator/1.cc: New.
  98         * testsuite/25_algorithms/copy_n/istreambuf_iterator/1_neg.cc: New.
  99         * testsuite/25_algorithms/copy_n/istreambuf_iterator/2_neg.cc: New.
 100
 101         * include/bits/stl_iterator_base_types.h (__iterator_category_t): Define
 102         for C++11.
 103         (_RequireInputIte): Likewise and use __enable_if_t.
 104         * include/std/numeric
 105         (__is_random_access_iter): Use __iterator_category_t.
 106
 107         * include/bits/stl_algo.h (copy_n): Add __glibcxx_requires_can_increment
 108         debug checks.
 109         * testsuite/25_algorithms/copy_n/debug/1_neg.cc: New.
 110         * testsuite/25_algorithms/copy_n/debug/2_neg.cc: New.
 111
 112 2019-10-04  François Dumont  <fdumont@gcc.gnu.org>
 113
 114         * include/debug/forward_list
 115         (_Sequence_traits<__debug::forward_list<>>::_S_size): Returns __dp_sign
 116         distance when not empty.
 117         * include/debug/list (_Sequence_traits<__debug::list<>>::_S_size):
 118         Likewise.
 119         * include/debug/helper_functions.h (__dp_sign_max_size): New
 120         _Distance_precision enum entry.
 121         (__valid_range_aux(_IIte, _IIte, _Distance_traits<>::__type,
 122         __false_type)): Adapt.
 123         * include/debug/safe_iterator.tcc
 124         (_Safe_iterator<>::_M_get_distance_to(const _Safe_iterator&)): Review
 125         distance computation.
 126
 127 2019-10-04  Jonathan Wakely  <jwakely@redhat.com>
 128
 129         PR libstdc++/81091
 130         PR libstdc++/91947
 131         * configure.ac: Use AC_SYS_LARGEFILE to enable 64-bit file APIs.
 132         * config.h.in: Regenerate:
 133         * configure: Regenerate:
 134         * include/Makefile.am (${host_builddir}/largefile-config.h): New
 135         target to generate config header for filesystem library.
 136         (${host_builddir}/c++config.h): Rename macros for large file support.
 137         * include/Makefile.in: Regenerate.
 138         * src/c++17/fs_dir.cc: Include new config header.
 139         * src/c++17/fs_ops.cc: Likewise.
 140         (filesystem::file_size): Use uintmax_t for size.
 141         * src/filesystem/dir.cc: Include new config header.
 142         * src/filesystem/ops.cc: Likewise.
 143         (experimental::filesystem::file_size): Use uintmax_t for size.
 144
 145         * testsuite/util/testsuite_abi.h: Use std::unordered_map instead of
 146         std::tr1::unordered_map.
 147         * testsuite/util/testsuite_allocator.h: Likewise.
 148
 149         * include/tr1/hashtable.h: Add header for __gnu_cxx::__alloc_traits.
 150
 151         * include/tr1/hashtable.h (tr1::_Hashtable::_M_allocate_node): Use
 152         __gnu_cxx::__alloc_traits for allocator construct function.
 153         (tr1::_Hashtable::_M_deallocate_node): Likewise for destroy function.
 154
 155         * include/precompiled/stdc++.h: Include <span> for C++20.
 156         * testsuite/17_intro/names.cc: Do not define 'e' for C++20.
 157
 158 2019-10-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 159
 160         * include/parallel/multiway_merge.h (_RAIter3): Replace _C by _Cp.
 161
 162 2019-10-02  Jonathan Wakely  <jwakely@redhat.com>
 163
 164         * config/abi/pre/gnu.ver: Tighten up greedy wildcards.
 165
 166         * doc/xml/manual/parallel_mode.xml: Add caveat about support for
 167         recent standards.
 168         * doc/html/*: Regenerate.
 169
 170 2019-10-01  Jonathan Wakely  <jwakely@redhat.com>
 171
 172         * include/experimental/algorithm (experimental::sample): Qualify call
 173         to __sample correctly.
 174         * include/parallel/algo.h (sample, for_each_n): Add using-declarations
 175         for algorithms that don't have parallel implementations.
 176
 177         * include/parallel/algobase.h (equal, lexicographical_compare): Add
 178         _GLIBCXX20_CONSTEXPR and dispatch to sequential algorithm when being
 179         constant evaluated.
 180         * include/parallel/algorithmfwd.h (equal, lexicographical_compare):
 181         Add _GLIBCXX20_CONSTEXPR.
 182
 183         * testsuite/17_intro/using_namespace_std_tr1_neg.cc: Skip test for
 184         parallel mode.
 185         * testsuite/20_util/hash/84998.cc: Likewise.
 186         * testsuite/23_containers/deque/types/pmr_typedefs_debug.cc: Likewise.
 187         * testsuite/23_containers/forward_list/pmr_typedefs_debug.cc: Likewise.
 188         * testsuite/23_containers/list/pmr_typedefs_debug.cc: Likewise.
 189         * testsuite/23_containers/map/pmr_typedefs_debug.cc: Likewise.
 190         * testsuite/23_containers/multimap/pmr_typedefs_debug.cc: Likewise.
 191         * testsuite/23_containers/multiset/pmr_typedefs_debug.cc: Likewise.
 192         * testsuite/23_containers/set/pmr_typedefs_debug.cc: Likewise.
 193         * testsuite/23_containers/unordered_map/pmr_typedefs_debug.cc:
 194         Likewise.
 195         * testsuite/23_containers/unordered_multimap/pmr_typedefs_debug.cc:
 196         Likewise.
 197         * testsuite/23_containers/unordered_multiset/pmr_typedefs_debug.cc:
 198         Likewise.
 199         * testsuite/23_containers/unordered_set/pmr_typedefs_debug.cc:
 200         Likewise.
 201         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
 202         Likewise.
 203         * testsuite/23_containers/vector/types/pmr_typedefs_debug.cc: Likewise.
 204         * testsuite/25_algorithms/binary_search/partitioned.cc: Likewise.
 205         * testsuite/25_algorithms/copy/86658.cc: Likewise.
 206         * testsuite/25_algorithms/equal_range/partitioned.cc: Likewise.
 207         * testsuite/25_algorithms/lexicographical_compare/71545.cc: Likewise.
 208         * testsuite/25_algorithms/lower_bound/partitioned.cc: Likewise.
 209         * testsuite/25_algorithms/upper_bound/partitioned.cc: Likewise.
 210
 211         * include/parallel/algo.h: Replace non-reserved names.
 212         * include/parallel/multiway_merge.h: Likewise.
 213         * include/parallel/multiway_mergesort.h: Likewise.
 214         * include/parallel/numericfwd.h: Likewise.
 215         * testsuite/17_intro/names.cc: Add RAI to test macros.
 216
 217 2019-09-30  François Dumont  <fdumont@gcc.gnu.org>
 218
 219         * include/debug/array: Add C++20 constexpr to comparison operators.
 220         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc: Adapt
 221         dg-error line numbers.
 222         * testsuite/23_containers/array/tuple_interface/
 223         tuple_element_debug_neg.cc: Likewise.
 224
 225 2019-09-30  Andreas Tobler  <andreast@gcc.gnu.org>
 226
 227         * include/experimental/internet: Include netinet/in.h if we have
 228         _GLIBCXX_HAVE_NETINET_IN_H defined.
 229
 230         * testsuite/ext/special_functions/airy_ai/check_nan.cc: Ignore the
 231         FreeBSD warning about lower advertised precision of tgammal.
 232         * testsuite/ext/special_functions/airy_bi/check_nan.cc: Likewise.
 233         * testsuite/special_functions/07_cyl_bessel_i/check_nan.cc: Likewise.
 234         * testsuite/special_functions/08_cyl_bessel_j/check_nan.cc: Likewise.
 235         * testsuite/special_functions/09_cyl_bessel_k/check_nan.cc: Likewise.
 236         * testsuite/special_functions/10_cyl_neumann/check_nan.cc: Likewise.
 237         * testsuite/special_functions/19_sph_bessel/check_nan.cc: Likewise.
 238         * testsuite/special_functions/21_sph_neumann/check_nan.cc: Likewise.
 239         * testsuite/tr1/5_numerical_facilities/special_functions/
 240         08_cyl_bessel_i/check_nan.cc: Likewise.
 241         * testsuite/tr1/5_numerical_facilities/special_functions/
 242         09_cyl_bessel_j/check_nan.cc: Likewise.
 243         * testuite/tr1/5_numerical_facilities/special_functions/
 244         10_cyl_bessel_k/check_nan.cc: Likewise.
 245         * testsuite/tr1/5_numerical_facilities/special_functions/
 246         11_cyl_neumann/check_nan.cc: Likewise.
 247         * testsuite/tr1/5_numerical_facilities/special_functions/
 248         21_sph_bessel/check_nan.cc: Likewise.
 249         * testsuite/tr1/5_numerical_facilities/special_functions/
 250         23_sph_neumann/check_nan.cc: Likewise.
 251
 252 2019-09-30  Jonathan Wakely  <jwakely@redhat.com>
 253
 254         * include/std/span (span(element_type(&)[N]))
 255         (span(array<value_type, N>&), span(const array<value_type, N>&)):
 256         Deduce array element type to allow safe const conversions (LWG 3255).
 257         [!_GLIBCXX_P1394] (span(Container&), span(const Container&)): Use
 258         remove_cv_t on arguments to __is_std_span and __is_std_array.
 259         * testsuite/23_containers/span/lwg3255.cc: New test.
 260
 261         PR libstdc++/77936
 262         * include/parallel/checkers.h (__is_sorted): Remove unused variable.
 263
 264 2019-09-28  François Dumont  <fdumont@gcc.gnu.org>
 265
 266         * include/bits/stl_algo.h (merge): Fix documentation.
 267         * include/debug/functions.h (__check_sorted_aux): Add C++20 constexpr.
 268         (__check_sorted): Likewise and remove nested irreflexive check.
 269         (__check_sorted_set_aux, __check_sorted_set): Add C++20 constexpr.
 270         (__check_partitioned_lower, __check_partitioned_upper): Likewise.
 271         (_Irreflexive_checker::_S_is_valid): Likewise.
 272         (__is_irreflexive, __is_irreflexive_pred): Likewise.
 273         * include/debug/helper_functions.h (__get_distance): Add constexpr.
 274         (__valid_range_aux): Add C++20 constexpr.
 275         (__valid_range(_Iter, _Iter, _Distance_traits<_Iter>::__type&)):
 276         Likewise and add std::is_constant_evaluated check.
 277         (__valid_range_aux(_Iter, _Iter, std::input_iterator_tag)): New.
 278         (__valid_range_aux(_Iter, _Iter, std::random_accss_iterator_tag)): New.
 279         (__valid_range_aux(_Integral, _Integral, std::__true_type)): New,
 280         use latter.
 281         (__valid_range(_Iter, _Iter)): Adapt to use latter, add constexpr and
 282         __builtin_is_contant_evaludated check..
 283         (__can_advance, __base): Add constexpr.
 284         * include/debug/macros.h [_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED]
 285         (_GLIBCXX_DEBUG_VERIFY_COND_AT): New.
 286         (__glibcxx_check_sorted): Use __glibcxx_check_irreflexive.
 287         (__glibcxx_check_sorted_pred): Use __glibcxx_check_irreflexive_pred.
 288         * testsuite/25_algorithms/binary_search/constexpr.cc: Use irreflexive
 289         std::less.
 290         * testsuite/25_algorithms/is_sorted/constexpr.cc: Likewise.
 291         * testsuite/25_algorithms/merge/constexpr.cc: Fix order in camm. Fix
 292         lambda to be irreflexive.
 293
 294 2019-09-27  Maciej W. Rozycki  <macro@wdc.com>
 295
 296         * configure: Regenerate.
 297
 298 2019-09-27  Jonathan Wakely  <jwakely@redhat.com>
 299
 300         PR libstdc++/91910
 301         * src/c++11/debug.cc (_Safe_iterator_base::_M_detach()): Load pointer
 302         atomically and lock the mutex before accessing the sequence.
 303         (_Safe_local_iterator_base::_M_detach()): Likewise.
 304         (_Safe_iterator_base::_M_reset()): Clear _M_sequence atomically.
 305
 306 2019-09-26  Jonathan Wakely  <jwakely@redhat.com>
 307
 308         * include/debug/array (to_array): Define for debug mode.
 309
 310         * include/bits/stl_pair.h (pair): Add _GLIBCXX20_CONSTEXPR to
 311         piecewise construction constructor, assignment operators, and swap.
 312         * include/std/tuple (pair::pair(piecewise_construct_t, tuple, tuple)):
 313         Add _GLIBCXX20_CONSTEXPR.
 314         (pair::pair(tuple, tuple, _Index_tuple, _Index_tuple)): Likewise.
 315         * testsuite/20_util/pair/constexpr_assign.cc: New test.
 316         * testsuite/20_util/pair/constexpr_swap.cc: New test.
 317
 318         * include/experimental/internet (operator==, operator<): Fix loop
 319         condition to avoid reading past the end of the array.
 320
 321         * include/std/array: Remove references to profile mode.
 322         * include/std/bitset: Likewise.
 323         * include/std/deque: Likewise.
 324         * include/std/forward_list: Likewise.
 325         * include/std/list: Likewise.
 326         * include/std/map: Likewise.
 327         * include/std/set: Likewise.
 328         * include/std/unordered_map: Likewise.
 329         * include/std/unordered_set: Likewise.
 330         * include/std/vector: Likewise.
 331         * testsuite/17_intro/headers/c++1998/profile_mode.cc: New test.
 332         * testsuite/17_intro/headers/c++2011/profile_mode.cc: New test.
 333
 334 2019-09-25  Jonathan Wakely  <jwakely@redhat.com>
 335
 336         * include/bits/regex.h
 337         (basic_regex::assign(const C*, size_t, flag_type)): Add default
 338         argument (LWG 3296).
 339         * testsuite/28_regex/basic_regex/assign/char/lwg3296.cc: New test.
 340         * testsuite/28_regex/basic_regex/assign/wchar_t/lwg3296.cc: New test.
 341
 342 2019-09-24  Jonathan Wakely  <jwakely@redhat.com>
 343
 344         * include/std/variant (variant::index()): Remove impossible case.
 345
 346         PR libstdc++/91871
 347         * testsuite/util/testsuite_hooks.h
 348         (conversion::iterator_to_const_iterator()): Do not return an invalid
 349         iterator. Test direct-initialization and direct-list-initialization
 350         as well as implicit conversion.
 351
 352 2019-09-23  Jonathan Wakely  <jwakely@redhat.com>
 353
 354         PR libstdc++/91788 (partial)
 355         * include/std/variant (variant::index()): Improve codegen for cases
 356         where conversion to size_t already works correctly.
 357
 358 2019-09-23  Andreas Schwab  <schwab@suse.de>
 359
 360         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
 361
 362 2019-09-12  Jonathan Wakely  <jwakely@redhat.com>
 363
 364         PR libstdc++/91748
 365         * include/bits/stl_algo.h (for_each_n): Fix random access iterator
 366         case.
 367         * testsuite/25_algorithms/for_each/for_each_n.cc: Test with random
 368         access iterators.
 369
 370 2019-09-11  Jonathan Wakely  <jwakely@redhat.com>
 371
 372         * python/libstdcxx/v6/xmethods.py (SharedPtrUseCountWorker.__call__):
 373         Fix syntax error.
 374
 375         * testsuite/20_util/result_of/sfinae_friendly_1.cc: Add -Wno-volatile
 376         for C++2a and up. Define HAS_52748_FIXED and fix incorrect tests.
 377         * testsuite/tr1/3_function_objects/result_of.cc: Add -Wno-volatile
 378         for C++2a and up.
 379
 380 2019-09-10  Jonathan Wakely  <jwakely@redhat.com>
 381
 382         * include/std/type_traits (__do_common_type_impl): Implement
 383         additional COND-RES(CREF(D1), CRED(D2)) condition for C++20.
 384         (basic_common_reference, common_reference, common_reference_t): Define
 385         for C++20.
 386         * testsuite/20_util/common_reference/requirements/alias_decl.cc: New
 387         test.
 388         * testsuite/20_util/common_reference/requirements/
 389         explicit_instantiation.cc: New test.
 390         * testsuite/20_util/common_reference/requirements/typedefs.cc: New
 391         test.
 392
 393         * include/std/charconv (to_chars): Rename to __to_chars_i. Define
 394         non-template overloads for each signed and unsigned integer type and
 395         char. Define deleted overload for bool (LWG 3266).
 396         * testsuite/20_util/to_chars/1_neg.cc: Remove.
 397         * testsuite/20_util/to_chars/3.cc: New test.
 398         * testsuite/20_util/to_chars/lwg3266.cc: New test.
 399
 400 2019-09-10  Christophe Lyon  <christophe.lyon@st.com>
 401
 402         * acinclude.m4: Handle uclinux*.
 403         * configure: Regenerate.
 404         * configure.host: Handle uclinux*
 405
 406 2019-09-10  Christophe Lyon  <christophe.lyon@st.com>
 407         Mickaël Guêné <mickael.guene@st.com>
 408
 409         * libsupc++/eh_personality.cc (get_ttype_entry): Add FDPIC
 410         support.
 411
 412 2019-09-10  Jonathan Wakely  <jwakely@redhat.com>
 413
 414         PR libstdc++/91711
 415         * testsuite/23_containers/span/get_neg.cc: Avoid ambiguity due to
 416         0ul being a valid null pointer constant.
 417
 418         * include/std/type_traits (__remove_cv_t): New alias template.
 419         (is_void, is_integral, is_floating_point, is_pointer)
 420         (is_member_object_pointer, is_member_function_pointer, is_null_pointer)
 421         (is_member_point), __is_signed_integer, __is_unsigned_integer)
 422         (__make_unsigned_selector, __make_signed_selector, remove_pointer)
 423         (__decay_selector): Use __remove_cv_t.
 424         (remove_cv): Add partial specializations for cv-qualified types.
 425         (__decay_t): New alias template.
 426         (__decay_and_strip, __common_type_impl, __result_of_impl): Use
 427         __decay_t.
 428         (__enable_if_t): Move earlier in the file.
 429         (_Require): Use __enable_if_t.
 430         (swap(T&, T&)): Use _Require.
 431         (swap(T(&)[N])): Use __enable_if_t.
 432
 433 2019-09-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
 434
 435         Implement C++20 p1424 - 'constexpr' feature macro concerns,
 436         Issue 3256 - Feature testing macro for constexpr algorithms,
 437         and Issue 3257 - Missing feature testing macro update from P0858.
 438         * include/std/version (__cpp_lib_constexpr_algorithms): Bump value.
 439         * include/bits/algorithmfwd.h: Ditto.
 440         * include/std/utility: Ditto.
 441         * testsuite/25_algorithms/constexpr_macro.cc: Ditto.
 442         * testsuite/25_algorithms/cpp_lib_constexpr.cc: New check for
 443         __cpp_lib_constexpr macro in <algorith>.
 444         * testsuite/20_util/exchange/constexpr.cc: Add check for
 445         __cpp_lib_constexpr macro in <utility>.
 446         * testsuite/25_algorithms/adjacent_find/constexpr.cc: Remove check for
 447         __cpp_lib_constexpr_algorithms.
 448         * testsuite/25_algorithms/all_of/constexpr.cc: Ditto.
 449         * testsuite/25_algorithms/any_of/constexpr.cc: Ditto.
 450         * testsuite/25_algorithms/binary_search/constexpr.cc: Ditto.
 451         * testsuite/25_algorithms/copy/constexpr.cc: Ditto.
 452         * testsuite/25_algorithms/copy_backward/constexpr.cc: Ditto.
 453         * testsuite/25_algorithms/copy_if/constexpr.cc: Ditto.
 454         * testsuite/25_algorithms/copy_n/constexpr.cc: Ditto.
 455         * testsuite/25_algorithms/count/constexpr.cc: Ditto.
 456         * testsuite/25_algorithms/count_if/constexpr.cc: Ditto.
 457         * testsuite/25_algorithms/equal/constexpr.cc: Ditto.
 458         * testsuite/25_algorithms/equal_range/constexpr.cc: Ditto.
 459         * testsuite/25_algorithms/fill/constexpr.cc: Ditto.
 460         * testsuite/25_algorithms/fill_n/constexpr.cc: Ditto.
 461         * testsuite/25_algorithms/find/constexpr.cc: Ditto.
 462         * testsuite/25_algorithms/find_end/constexpr.cc: Ditto.
 463         * testsuite/25_algorithms/find_first_of/constexpr.cc: Ditto.
 464         * testsuite/25_algorithms/find_if/constexpr.cc: Ditto.
 465         * testsuite/25_algorithms/find_if_not/constexpr.cc: Ditto.
 466         * testsuite/25_algorithms/for_each/constexpr.cc: Ditto.
 467         * testsuite/25_algorithms/generate/constexpr.cc: Ditto.
 468         * testsuite/25_algorithms/generate_n/constexpr.cc: Ditto.
 469         * testsuite/25_algorithms/is_heap/constexpr.cc: Ditto.
 470         * testsuite/25_algorithms/is_heap_until/constexpr.cc: Ditto.
 471         * testsuite/25_algorithms/is_partitioned/constexpr.cc: Ditto.
 472         * testsuite/25_algorithms/is_permutation/constexpr.cc: Ditto.
 473         * testsuite/25_algorithms/is_sorted/constexpr.cc: Ditto.
 474         * testsuite/25_algorithms/is_sorted_until/constexpr.cc: Ditto.
 475         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc: Ditto.
 476         * testsuite/25_algorithms/lower_bound/constexpr.cc: Ditto.
 477         * testsuite/25_algorithms/merge/constexpr.cc: Ditto.
 478         * testsuite/25_algorithms/mismatch/constexpr.cc: Ditto.
 479         * testsuite/25_algorithms/none_of/constexpr.cc: Ditto.
 480         * testsuite/25_algorithms/partition_copy/constexpr.cc: Ditto.
 481         * testsuite/25_algorithms/partition_point/constexpr.cc: Ditto.
 482         * testsuite/25_algorithms/remove/constexpr.cc: Ditto.
 483         * testsuite/25_algorithms/remove_copy/constexpr.cc: Ditto.
 484         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: Ditto.
 485         * testsuite/25_algorithms/remove_if/constexpr.cc: Ditto.
 486         * testsuite/25_algorithms/replace_copy/constexpr.cc: Ditto.
 487         * testsuite/25_algorithms/replace_copy_if/constexpr.cc: Ditto.
 488         * testsuite/25_algorithms/replace_if/constexpr.cc: Ditto.
 489         * testsuite/25_algorithms/reverse_copy/constexpr.cc: Ditto.
 490         * testsuite/25_algorithms/rotate_copy/constexpr.cc: Ditto.
 491         * testsuite/25_algorithms/search/constexpr.cc: Ditto.
 492         * testsuite/25_algorithms/search_n/constexpr.cc: Ditto.
 493         * testsuite/25_algorithms/set_difference/constexpr.cc: Ditto.
 494         * testsuite/25_algorithms/set_intersection/constexpr.cc: Ditto.
 495         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc: Ditto.
 496         * testsuite/25_algorithms/set_union/constexpr.cc: Ditto.
 497         * testsuite/25_algorithms/transform/constexpr.cc: Ditto.
 498         * testsuite/25_algorithms/unique/constexpr.cc: Ditto.
 499         * testsuite/25_algorithms/unique_copy/constexpr.cc: Ditto.
 500         * testsuite/25_algorithms/upper_bound/constexpr.cc: Ditto.
 501
 502 2019-09-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
 503
 504         Update docs for recent <span> and constexpr lib changes.
 505         * doc/xml/manual/status_cxx2020.xml: Update p0202r3, p0858r0, p0879r0,
 506         p1023r0, p1085r2 status.
 507         * doc/html/manual/status.html: Regenerate.
 508
 509 2019-09-09  Antony Polukhin  <antoshkka@gmail.com>
 510
 511         * include/bits/charconv.h (__detail::__to_chars_10_impl): Replace
 512         final offsets with constants.
 513
 514 2019-09-09  Jonathan Wakely  <jwakely@redhat.com>
 515
 516         * include/bits/range_access.h (__adl_to_address): Remove.
 517         * include/std/span (__is_base_derived_safe_convertible_v): Replace
 518         with span::__is_compatible.
 519         (__is_std_array_v): Replace with __is_std_array class template and
 520         partial specializations.
 521         (__is_std_array, __is_std_span): New class templates and partial
 522         specializations.
 523         (span::__is_compatible): New alias template for SFINAE constraints.
 524         (span::span(element_type (&)[N])): Remove redundant constraints. Do
 525         not use __adl_data to obtain a pointer.
 526         (span::span(array<value_type, N>&)): Likewise.
 527         (span::span(const array<value_type, N>&)): Likewise.
 528         [_GLIBCXX_P1394] (span::iter_reference_t, span::iterator_t)
 529         (span::iter_value_t, span::derived_from): New alias templates for
 530         SFINAE constraints, until the equivalents are supported in <concepts>
 531         and <iterator>.
 532         [_GLIBCXX_P1394] (span::__is_compatible_iterator): New alias template
 533         for SFINAE constraints.
 534         [_GLIBCXX_P1394] (span::is_compatible_range): New class template for
 535         SFINAE constraints.
 536         [_GLIBCXX_P1394] (span::span(Range&&)): Improve constraints.
 537         [_GLIBCXX_P1394] (span::span(ContiguousIterator, Sentinel)): Likewise.
 538         Use std::to_address instead of __adl_to_address.
 539         [_GLIBCXX_P1394] (span::span(ContiguousIterator, size_type)): Likewise.
 540         [!_GLIBCXX_P1394] (span::__is_compatible_container): New alias
 541         template for SFINAE constraints.
 542         [!_GLIBCXX_P1394] (span::span(Container&))
 543         (span::span(const Container&)): Improve constraints.
 544         [!_GLIBCXX_P1394] (span::span(pointer, size_type))
 545         (span::span(pointer, pointer)): Remove redundant cast of pointer.
 546         (span(const span<OType, OExtent>&)): New constructor.
 547
 548 2019-09-06  Jonathan Wakely  <jwakely@redhat.com>
 549
 550         * include/bits/range_access.h (ssize): Define for C++20.
 551         * testsuite/24_iterators/range_access_cpp20.cc: New test.
 552         * doc/xml/manual/status_cxx2020.xml: Update P1227R2 status.
 553         * doc/html/*: Regenerate.
 554
 555 2019-09-06  Florian Weimer  <fweimer@redhat.com>
 556
 557         * configure: Regenerate.
 558
 559 2019-09-05  Jonathan Wakely  <jwakely@redhat.com>
 560
 561         * doc/xml/manual/status_cxx2020.xml: Update status for P0122R7 and
 562         P1024R3. Remove entry for P0920R2.
 563         * include/std/span  (__cpp_lib_span): Change value.
 564         (__extent_storage, __extent_storage<dynamic_extent>): Remove default
 565         constructor.
 566         (span): Replace __extent_storage base class with data member.
 567         (span::_S_subspan_extent): New function.
 568         (span::empty()): Add nodiscard attribute.
 569         (span::front, span::back, span::operator[]): Check preconditions.
 570         (span::first, span::last, span::subspan): Add noexcept. Improve
 571         precondition checks (LWG 3103).
 572         (get): Remove redundant condition from static_assert.
 573         (tuple_element<I, span<T, E>>): Fix static_assert message and simplify.
 574         (as_writable_bytes): Add inline specifier.
 575         * include/std/version (__cpp_lib_span): Change value.
 576         * testsuite/23_containers/span/back_neg.cc: Remove stray semi-colon.
 577         * testsuite/23_containers/span/front_neg.cc: Likewise.
 578         * testsuite/23_containers/span/index_op_neg.cc: Likewise.
 579         * testsuite/23_containers/span/last_neg.cc: Improve test.
 580         * testsuite/23_containers/span/subspan_neg.cc: Likewise.
 581         * testsuite/23_containers/span/1.cc: New test.
 582         * testsuite/23_containers/span/2.cc: New test.
 583         * testsuite/23_containers/span/back_assert_neg.cc: New test.
 584         * testsuite/23_containers/span/first_2_assert_neg.cc: New test.
 585         * testsuite/23_containers/span/first_assert_neg.cc: New test.
 586         * testsuite/23_containers/span/first_neg.cc: New test.
 587         * testsuite/23_containers/span/front_assert_neg.cc: New test.
 588         * testsuite/23_containers/span/index_op_assert_neg.cc: New test.
 589         * testsuite/23_containers/span/last_2_assert_neg.cc: New test.
 590         * testsuite/23_containers/span/last_assert_neg.cc: New test.
 591         * testsuite/23_containers/span/subspan_2_assert_neg.cc: New test.
 592         * testsuite/23_containers/span/subspan_3_assert_neg.cc: New test.
 593         * testsuite/23_containers/span/subspan_4_assert_neg.cc: New test.
 594         * testsuite/23_containers/span/subspan_5_assert_neg.cc: New test.
 595         * testsuite/23_containers/span/subspan_6_assert_neg.cc: New test.
 596         * testsuite/23_containers/span/subspan_assert_neg.cc: New test.
 597
 598 2019-09-05  JeanHeyd Meneide  <phdofthehouse@gmail.com>
 599
 600         * include/Makefile.am: Add <span> header.
 601         * include/Makefile.in: Regenerate.
 602         * include/bits/range_access.h (__adl_begin, __adl_end, __adl_cbegin)
 603         (__adl_cend, __adl_rbegin, __adl_rend, __adl_crbegin, __adl_crend)
 604         (__adl_data, __adl_cdata, __adl_size, __adl_empty, __adl_to_address):
 605         New functions for performing argument-dependent lookup of range
 606         customization points.
 607         * include/bits/stl_iterator.h (__normal_iterator): Add
 608         _GLIBCXX20_CONSTEXPR to all functions.
 609         * include/std/span: New header.
 610         * include/std/version (__cpp_lib_span): Define feature test macro.
 611         * testsuite/23_containers/span/contiguous_range_neg.cc: New test.
 612         * testsuite/23_containers/span/everything.cc: New test.
 613         * testsuite/23_containers/span/get_neg.cc: New test.
 614         * testsuite/23_containers/span/last_neg.cc: New test.
 615         * testsuite/23_containers/span/subspan_neg.cc: New test.
 616         * testsuite/23_containers/span/tuple_element_dynamic_neg.cc: New test.
 617         * testsuite/23_containers/span/tuple_element_oob_neg.cc: New test.
 618         * testsuite/23_containers/span/tuple_size_neg.cc: New test.
 619
 620 2019-09-05  Jonathan Wakely  <jwakely@redhat.com>
 621
 622         * doc/xml/manual/allocator.xml: Remove URL for bibliography entry.
 623         * doc/html/*: Regenerate.
 624
 625 2019-09-04  Mike Crowe  <mac@mcrowe.com>
 626
 627         PR libstdc++/41861
 628         * acinclude.m4 (GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT): Check for new
 629         pthread_cond_clockwait function.
 630         * configure.ac: Use GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT.
 631         * configure: Regenerate.
 632         * config.h.in: Regenerate.
 633         * include/std/condition_variable: (condition_variable): Rename
 634         __steady_clock_t typedef and add system_clock. Change __clock_t to be
 635         a typedef for the preferred clock to convert arbitrary other clocks to.
 636         [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT] (wait_until): Add a steady_clock
 637         overload.
 638         (wait_until): Change __clock_t overload to use system_clock.
 639         [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT] (__wait_until_impl): Add
 640         steady_clock overload that calls pthread_cond_clockwait.
 641         (__wait_until_impl): Change __clock_t overload to use system_clock.
 642         (condition_variable_any) [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT]: Use
 643         steady_clock for __clock_t if pthread_cond_clockwait is available.
 644
 645 2019-09-04  Mike Crowe  <mac@mcrowe.com>
 646
 647         * testsuite/30_threads/condition_variable/members/2.cc (test01):
 648         Parameterise so that test can be run against an arbitrary clock.
 649         (main): Test using std::chrono::steady_clock and a user-defined
 650         clock in addition to the previous std::chrono::system_clock.
 651         * testsuite/30_threads/condition_variable_any/members/2.cc: Likewise.
 652
 653 2019-09-03  Ulrich Weigand  <uweigand@de.ibm.com>
 654
 655         * crossconfig.m4: Remove references to spu.
 656         * configure: Regenerate.
 657         * doc/xml/manual/appendix_contributing.xml: Remove references
 658         to __ea as "badword" for spu.
 659         * doc/html/manual/source_code_style.html: Regenerate.
 660         * include/tr1/ell_integral.tcc (__ellint_rd): Do not attempt
 661         to avoid __ea (as "badword" for spu).
 662         (__ellint_rj): Likewise.
 663
 664 2019-09-03  Chung-Lin Tang  <cltang@codesourcery.com>
 665
 666         PR other/79543
 667         * acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Fix GNU ld --version
 668         scanning to conform to the GNU Coding Standards.
 669         * configure: Regenerate.
 670
 671 2019-09-02  Jonathan Wakely  <jwakely@redhat.com>
 672
 673         * src/c++17/memory_resource.cc: Use __constinit keyword.
 674
 675 2019-09-02  Jonathan Wakely  <jwakely@redhat.com>
 676
 677         * doc/xml/manual/abi.xml: Document 9.x library versions.
 678         * doc/html/*: Regenerate.
 679
 680 2019-09-02  Jonathan Wakely  <jwakely@redhat.com>
 681
 682         * include/std/charconv (__detail::__to_chars_2_len): Use std::log2p1.
 683         (__detail::__to_chars_8_len): Remove.
 684         (__detail::__to_chars_8): Inline length calculation here.
 685         (__detail::__from_chars_binary): Use numeric_limits instead of
 686         CHAR_BIT.
 687
 688 2019-09-02  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 689
 690         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
 691         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt: Likewise.
 692         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
 693         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
 694         Likewise.
 695
 696 2019-09-01  François Dumont  <fdumont@gcc.gnu.org>
 697
 698         * testsuite_files/util/testsuite_performance.h
 699         (resource_counter::start): Ignore unused malloc(0) result.
 700
 701 2019-09-01  Gerald Pfeifer  <gerald@pfeifer.com>
 702
 703         * doc/xml/manual/policy_data_structures_biblio.xml (COM: Component
 704         Model Object Technologies): Adjust name and link.
 705
 706 2019-08-30  Antony Polukhin  <antoshkka@gmail.com>
 707
 708         * include/std/charconv (__detail::__to_chars_8)
 709         __detail::__to_chars_16): Replace array of precomputed digits with
 710         arithmetic operations to avoid CPU cache misses. Remove zero
 711         termination from array of digits to allow symbol merge with generic
 712         implementation of __detail::__to_chars. Replace final offsets with
 713         constants. Use __detail::__to_chars_len_2 instead of a generic
 714         __detail::__to_chars_len.
 715         (__detail::__to_chars): Remove zero termination from array of digits.
 716         (__detail::__to_chars_2): Leading digit is always '1'.
 717
 718 2019-08-30  Jonathan Wakely  <jwakely@redhat.com>
 719
 720         * testsuite/23_containers/vector/cons/89164_c++17.cc: Fix errors.
 721
 722 2019-08-30  Uros Bizjak  <ubizjak@gmail.com>
 723
 724         * config/abi/post/alpha-linux-gnu/baseline_symbols.txt: Update.
 725
 726 2019-08-30  Jonathan Wakely  <jwakely@redhat.com>
 727
 728         PR libstdc++/89164
 729         * include/bits/stl_algobase.h (__copy_move): Give descriptive names
 730         to template parameters.
 731         * include/bits/stl_uninitialized.h (uninitialized_copy)
 732         (uninitialized_fill, uninitialized_fill_n): Add static assertions to
 733         diagnose invalid uses.
 734         * testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
 735         Adjust expected error.
 736         * testsuite/20_util/specialized_algorithms/uninitialized_copy/89164.cc:
 737         New test.
 738         * testsuite/20_util/specialized_algorithms/uninitialized_copy_n/
 739         89164.cc: New test.
 740         * testsuite/20_util/specialized_algorithms/uninitialized_fill/89164.cc:
 741         New test.
 742         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/
 743         89164.cc: New test.
 744         * testsuite/23_containers/vector/cons/89164.cc: New test.
 745         * testsuite/23_containers/vector/cons/89164_c++17.cc: New test.
 746
 747 2019-08-29  Jonathan Wakely  <jwakely@redhat.com>
 748
 749         PR libstdc++/91067
 750         * acinclude.m4 (libtool_VERSION): Bump to 6:28:0.
 751         * configure: Regenerate.
 752         * config/abi/pre/gnu.ver (GLIBCXX_3.4.28): Add new version. Export
 753         missing symbols.
 754         * testsuite/27_io/filesystem/iterators/91067.cc: Test move
 755         constructors.
 756         * testsuite/util/testsuite_abi.cc: Add new symbol version.
 757
 758 2019-08-29  Jakub Jelinek  <jakub@redhat.com>
 759
 760         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
 761         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
 762
 763 2019-08-28  Jonathan Wakely  <jwakely@redhat.com>
 764
 765         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
 766         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
 767         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
 768         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
 769         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
 770         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
 771         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
 772
 773 2019-08-23  Joseph Myers  <joseph@codesourcery.com>
 774
 775         * src/filesystem/ops-common.h [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
 776         (std::filesystem::__gnu_posix::lstat): Add return type.
 777
 778 2019-08-20  Jonathan Wakely  <jwakely@redhat.com>
 779
 780         * doc/doxygen/user.cfg.in (INPUT): Remove profile mode headers.
 781
 782         * include/std/numeric (reduce): Fix Doxygen markup.
 783
 784         PR libstdc++/91371
 785         * include/std/type_traits (is_function): Simplify definition. Remove
 786         partial specializations for function types.
 787         (__is_referenceable): Simplify definition.
 788         * testsuite/20_util/bind/91371.cc: New test.
 789         * testsuite/20_util/is_function/91371.cc: New test.
 790         * testsuite/20_util/is_function/value.cc: Check more pointer types.
 791         * testsuite/20_util/is_member_function_pointer/91371.cc: New test.
 792         * testsuite/20_util/is_object/91371.cc: New test.
 793
 794 2019-08-16  Uros Bizjak  <ubizjak@gmail.com>
 795
 796         * config/abi/post/alpha-linux-gnu/baseline_symbols.txt: Update.
 797
 798 2019-08-15  Jonathan Wakely  <jwakely@redhat.com>
 799
 800         PR libstdc++/91456
 801         * include/bits/std_function.h (__check_func_return_type): Remove.
 802         (function::_Callable): Use std::__is_invocable_impl instead of
 803         __check_func_return_type.
 804         * include/std/type_traits (__is_invocable_impl): Add another defaulted
 805         template parameter. Define a separate partial specialization for
 806         INVOKE and INVOKE<void>. For INVOKE<R> replace is_convertible check
 807         with a check that models delayed temporary materialization.
 808         * testsuite/20_util/function/91456.cc: New test.
 809         * testsuite/20_util/is_invocable/91456.cc: New test.
 810
 811 2019-08-14  Jonathan Wakely  <jwakely@redhat.com>
 812
 813         * include/std/type_traits (__is_nullptr_t): Add deprecated attribute.
 814
 815 2019-08-14  Edward Smith-Rowland  <3dw4rd@verizon.net>
 816
 817         Implement C++20 p0879 - Constexpr for swap and swap related functions.
 818         * include/std/version (__cpp_lib_constexpr_swap_algorithms): New macro.
 819         * include/bits/algorithmfwd.h (__cpp_lib_constexpr_swap_algorithms):
 820         New macro.
 821         (iter_swap, make_heap, next_permutation, partial_sort_copy, pop_heap)
 822         (prev_permutation, push_heap, reverse, rotate, sort_heap, swap)
 823         (swap_ranges, nth_element, partial_sort, sort): Add constexpr.
 824         * include/bits/move.h (swap): Add constexpr.
 825         * include/bits/stl_algo.h (__move_median_to_first, __reverse, reverse)
 826         (__gcd, __rotate, rotate, __partition, __heap_select)
 827         (__partial_sort_copy, partial_sort_copy, __unguarded_partition)
 828         (__unguarded_partition_pivot, __partial_sort, __introsort_loop, __sort)
 829         (__introselect, __chunk_insertion_sort, next_permutation)
 830         (prev_permutation, partition, partial_sort, nth_element, sort)
 831         (__iter_swap::iter_swap, iter_swap, swap_ranges): Add constexpr.
 832         * include/bits/stl_algobase.h (__iter_swap::iter_swap, iter_swap)
 833         (swap_ranges): Add constexpr.
 834         * include/bits/stl_heap.h (__push_heap, push_heap, __adjust_heap,
 835         __pop_heap, pop_heap, __make_heap, make_heap, __sort_heap, sort_heap):
 836         Add constexpr.
 837         * include/std/type_traits (swap): Add constexpr.
 838         * testsuite/25_algorithms/headers/algorithm/synopsis.cc: Add constexpr.
 839         * testsuite/25_algorithms/iter_swap/constexpr.cc: New test.
 840         * testsuite/25_algorithms/make_heap/constexpr.cc: New test.
 841         * testsuite/25_algorithms/next_permutation/constexpr.cc: New test.
 842         * testsuite/25_algorithms/nth_element/constexpr.cc: New test.
 843         * testsuite/25_algorithms/partial_sort/constexpr.cc: New test.
 844         * testsuite/25_algorithms/partial_sort_copy/constexpr.cc: New test.
 845         * testsuite/25_algorithms/partition/constexpr.cc: New test.
 846         * testsuite/25_algorithms/pop_heap/constexpr.cc: New test.
 847         * testsuite/25_algorithms/prev_permutation/constexpr.cc: New test.
 848         * testsuite/25_algorithms/push_heap/constexpr.cc: New test.
 849         * testsuite/25_algorithms/reverse/constexpr.cc: New test.
 850         * testsuite/25_algorithms/rotate/constexpr.cc: New test.
 851         * testsuite/25_algorithms/sort/constexpr.cc: New test.
 852         * testsuite/25_algorithms/sort_heap/constexpr.cc: New test.
 853         * testsuite/25_algorithms/swap/constexpr.cc: New test.
 854         * testsuite/25_algorithms/swap_ranges/constexpr.cc: New test.
 855
 856 2019-08-12  Jonathan Wakely  <jwakely@redhat.com>
 857
 858         PR libstdc++/90361
 859         * src/c++17/string-inst.cc: Use _GLIBCXX_USE_CXX11_ABI=1 by default.
 860
 861         * include/std/tuple (__unpack_std_tuple): New variable template and
 862         partial specializations.
 863         (apply, make_from_tuple): Add noexcept-specifier.
 864         * testsuite/20_util/tuple/apply/2.cc: New test.
 865         * testsuite/20_util/tuple/make_from_tuple/2.cc: New test.
 866
 867 2019-08-09  Corentin Gay  <gay@adacore.com>
 868
 869         * testsuite/ext/random/beta_distribution/operators/serialize.cc,
 870         testsuite/ext/random/hypergeometric_distribution/operators/serialize.cc,
 871         testsuite/ext/random/normal_mv_distribution/operators/serialize.cc,
 872         testsuite/ext/random/triangular_distribution/operators/serialize.cc,
 873         testsuite/ext/random/von_mises_distribution/operators/serialize.cc:
 874         Add call to `VERIFY`.
 875
 876 2019-08-09  Alexandre Oliva <oliva@adacore.com>
 877
 878         * include/ext/random
 879         (normal_mv_distribution::param_type::param_type): New private
 880         ctor taking a decomposed varcov matrix, for use by...
 881         (operator>>): ... this, befriended.
 882         * include/ext/random.tcc (operator>>): Use it.
 883         (normal_mv_distribution::param_type::_M_init_lower): Adjust
 884         member function name in exception message.
 885
 886 2019-08-08  Jonathan Wakely  <jwakely@redhat.com>
 887
 888         P0325R4 to_array from LFTS with updates
 889         * include/experimental/array (to_array): Qualify call to __to_array.
 890         * include/std/array (__cpp_lib_to_array, to_array): Define for C++20.
 891         * include/std/version (__cpp_lib_to_array): Likewise.
 892         * testsuite/23_containers/array/creation/1.cc: New test.
 893         * testsuite/23_containers/array/creation/2.cc: New test.
 894         * testsuite/23_containers/array/creation/3_neg.cc: New test.
 895         * testsuite/23_containers/array/tuple_interface/tuple_element_neg.cc:
 896         Use zero for dg-error line number.
 897
 898 2019-08-06  Jonathan Wakely  <jwakely@redhat.com>
 899
 900         P1651R0 bind_front should not unwrap reference_wrapper
 901         * include/std/functional (bind_front): Don't unwrap reference_wrapper.
 902         * include/std/version (__cpp_lib_bind_front): Update value.
 903         * testsuite/20_util/function_objects/bind_front/1.cc: Fix test for
 904         feature test macro.
 905         * testsuite/20_util/function_objects/bind_front/2.cc: New test.
 906
 907         * include/std/numbers [!__STRICT_ANSI__ && _GLIBCXX_USE_FLOAT128]
 908         (e_v, log2e_v, log10e_v, pi_v, inv_pi_v, inv_sqrtpi_v, ln2_v, ln10_v)
 909         (sqrt2_v, sqrt3_v, inv_sqrt3, egamma_v, phi_v): Add explicit
 910         specializations for __float128.
 911         * testsuite/26_numerics/numbers/float128.cc: New test.
 912
 913 2019-08-04  Gerald Pfeifer  <gerald@pfeifer.com>
 914
 915         * doc/xml/manual/documentation_hacking.xml: doxygen.org is now
 916         doxygen.nl.
 917
 918 2019-08-01  Edward Smith-Rowland  <3dw4rd@verizon.net>
 919
 920         Implement C++20 p0202 - Add Constexpr Modifiers to Functions
 921         in <algorithm> and <utility> Headers.
 922         Implement C++20 p1023 - constexpr comparison operators for std::array.
 923         * include/bits/algorithmfwd.h (all_of, any_of, binary_search, copy,
 924         copy_backward, copy_if, copy_n, equal_range, fill, find_end,
 925         find_if_not, includes, is_heap, is_heap_until, is_partitioned,
 926         is_permutation, is_sorted, is_sorted_until, iter_swap, lower_bound,
 927         none_of, partition_copy, partition_point, remove, remove_if,
 928         remove_copy, remove_copy_if, replace_copy, replace_copy_if,
 929         reverse_copy, rotate_copy, uunique, upper_bound, adjacent_find, count,
 930         count_if, equal, find, find_first_of, find_if, for_each, generate,
 931         generate_n, lexicographical_compare, merge, mismatch, replace,
 932         replace_if, search, search_n, set_difference, set_intersection,
 933         set_symmetric_difference, set_union, transform, unique_copy):
 934         Mark constexpr.
 935         * include/bits/cpp_type_traits.h (__miter_base): Mark constexpr.
 936         * include/bits/predefined_ops.h (_Iter_less_val::operator(),
 937         _Val_less_iter::operator(), _Iter_equal_to_iter::operator(),
 938         _Iter_equal_to_val::operator(), _Iter_equals_val::operator()):
 939          Use const ref instead of ref arg;
 940         (_Iter_less_val, __iter_less_val, _Val_less_iter, __val_less_iter,
 941         __iter_equal_to_iter, __iter_equal_to_val, __iter_comp_val,
 942         _Iter_comp_val, _Val_comp_iter, __val_comp_iter, __iter_equals_val,
 943         _Iter_equals_iter, __iter_comp_iter, _Iter_pred, __pred_iter,
 944         _Iter_comp_to_val, __iter_comp_val, _Iter_comp_to_iter,
 945         __iter_comp_iter): Mark constexpr.
 946         * include/bits/stl_algo.h (__find_if, __find_if_not, __find_if_not_n,
 947         __search, __search_n_aux, __search_n, __find_end, find_end, all_of,
 948         none_of, any_of, find_if_not, is_partitioned, partition_point,
 949         __remove_copy_if, remove_copy, remove_copy_if, copy_if, __copy_n,
 950         copy_n, partition_copy, __remove_if, remove, remove_if, __adjacent_find,
 951         __unique, unique, __unique_copy, reverse_copy, rotate_copy,
 952         __unguarded_linear_insert, __insertion_sort, __unguarded_insertion_sort,
 953         __final_insertion_sort, lower_bound, __upper_bound, upper_bound,
 954         __equal_range, equal_range, binary_search, __includes, includes,
 955         __next_permutation, __prev_permutation, __replace_copy_if, replace_copy,
 956         replace_copy_if, __count_if, is_sorted, __is_sorted_until,
 957         is_sorted_until, __is_permutation, is_permutation, for_each, find,
 958         find_if, find_first_of, adjacent_find, count, count_if, search,
 959         search_n, transform, replace, replace_if, generate, generate_n,
 960         unique_copy, __merge, merge, __set_union, set_union, __set_intersection,
 961         set_intersection, __set_difference, set_difference,
 962         __set_symmetric_difference, set_symmetric_difference):  Mark constexpr.
 963         * include/bits/stl_algobase.h (__memmove, __memcmp): New maybe constexpr
 964         wrappers around __builtin_memmove and __builtin_memcmp
 965         respectively;
 966         (__niter_base, __niter_wrap, __copy_m, __copy_move_a, __copy_move_a2,
 967         copy, move, __copy_move_b, __copy_move_backward_a,
 968         __copy_move_backward_a2, copy_backward, move_backward, __fill_a, fill,
 969         __fill_n_a, fill_n, equal, __lc_rai::__newlast1, __lc_rai::__cnd2,
 970         __lexicographical_compare_impl, __lexicographical_compare,
 971         __lexicographical_compare<true>::__lc, __lexicographical_compare_aux,
 972         __lower_bound, lower_bound, equal, __equal4, lexicographical_compare,
 973         __mismatch, mismatch, __is_heap_until, __is_heap, is_heap_until,
 974         is_heap): Mark constexpr.
 975         * include/bits/stl_heap.h (__is_heap_until, __is_heap, is_heap_until,
 976         is_heap): Mark constexpr.
 977         * include/bits/stl_iterator.h (__niter_base, __miter_base): Mark constexpr.
 978         * include/std/array: Make comparison ops constexpr.
 979         * include/std/utility: Make exchange constexpr.
 980         * include/std/version (__cpp_lib_constexpr_algorithms): New macro.
 981         * testsuite/23_containers/array/tuple_interface/get_neg.cc: Adjust.
 982         * testsuite/23_containers/array/tuple_interface/
 983         tuple_element_neg.cc: Adjust.
 984         * testsuite/20_util/exchange/constexpr.cc: New.
 985         * testsuite/23_containers/array/comparison_operators/constexpr.cc: New.
 986         * testsuite/25_algorithms/constexpr_macro.cc: New.
 987         * testsuite/25_algorithms/adjacent_find/constexpr.cc: New.
 988         * testsuite/25_algorithms/all_of/constexpr.cc: New.
 989         * testsuite/25_algorithms/any_of/constexpr.cc: New.
 990         * testsuite/25_algorithms/binary_search/constexpr.cc: New.
 991         * testsuite/25_algorithms/copy/constexpr.cc: New.
 992         * testsuite/25_algorithms/copy_backward/constexpr.cc: New.
 993         * testsuite/25_algorithms/copy_if/constexpr.cc: New.
 994         * testsuite/25_algorithms/copy_n/constexpr.cc: New.
 995         * testsuite/25_algorithms/count/constexpr.cc: New.
 996         * testsuite/25_algorithms/count_if/constexpr.cc: New.
 997         * testsuite/25_algorithms/equal/constexpr.cc: New.
 998         * testsuite/25_algorithms/equal_range/constexpr.cc: New.
 999         * testsuite/25_algorithms/fill/constexpr.cc: New.
1000         * testsuite/25_algorithms/fill_n/constexpr.cc: New.
1001         * testsuite/25_algorithms/find/constexpr.cc: New.
1002         * testsuite/25_algorithms/find_end/constexpr.cc: New.
1003         * testsuite/25_algorithms/find_first_of/constexpr.cc: New.
1004         * testsuite/25_algorithms/find_if/constexpr.cc: New.
1005         * testsuite/25_algorithms/find_if_not/constexpr.cc: New.
1006         * testsuite/25_algorithms/for_each/constexpr.cc: New.
1007         * testsuite/25_algorithms/generate/constexpr.cc: New.
1008         * testsuite/25_algorithms/generate_n/constexpr.cc: New.
1009         * testsuite/25_algorithms/is_heap/constexpr.cc: New.
1010         * testsuite/25_algorithms/is_heap_until/constexpr.cc: New.
1011         * testsuite/25_algorithms/is_partitioned/constexpr.cc: New.
1012         * testsuite/25_algorithms/is_permutation/constexpr.cc: New.
1013         * testsuite/25_algorithms/is_sorted/constexpr.cc: New.
1014         * testsuite/25_algorithms/is_sorted_until/constexpr.cc: New.
1015         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc: New.
1016         * testsuite/25_algorithms/lower_bound/constexpr.cc: New.
1017         * testsuite/25_algorithms/merge/constexpr.cc: New.
1018         * testsuite/25_algorithms/mismatch/constexpr.cc: New.
1019         * testsuite/25_algorithms/none_of/constexpr.cc: New.
1020         * testsuite/25_algorithms/partition_copy/constexpr.cc: New.
1021         * testsuite/25_algorithms/partition_point/constexpr.cc: New.
1022         * testsuite/25_algorithms/remove/constexpr.cc: New.
1023         * testsuite/25_algorithms/remove_copy/constexpr.cc: New.
1024         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: New.
1025         * testsuite/25_algorithms/remove_if/constexpr.cc: New.
1026         * testsuite/25_algorithms/replace_copy/constexpr.cc: New.
1027         * testsuite/25_algorithms/replace_copy_if/constexpr.cc: New.
1028         * testsuite/25_algorithms/replace_if/constexpr.cc: New.
1029         * testsuite/25_algorithms/reverse_copy/constexpr.cc: New.
1030         * testsuite/25_algorithms/rotate_copy/constexpr.cc: New.
1031         * testsuite/25_algorithms/search/constexpr.cc: New.
1032         * testsuite/25_algorithms/search_n/constexpr.cc: New.
1033         * testsuite/25_algorithms/set_difference/constexpr.cc: New.
1034         * testsuite/25_algorithms/set_intersection/constexpr.cc: New.
1035         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc: New.
1036         * testsuite/25_algorithms/set_union/constexpr.cc: New.
1037         * testsuite/25_algorithms/transform/constexpr.cc: New.
1038         * testsuite/25_algorithms/unique/constexpr.cc: New.
1039         * testsuite/25_algorithms/unique_copy/constexpr.cc: New.
1040         * testsuite/25_algorithms/upper_bound/constexpr.cc: New.
1041
1042 2019-07-31  Jonathan Wakely  <jwakely@redhat.com>
1043
1044         * include/std/memory (make_obj_using_allocator): Qualify call to
1045         uses_allocator_construction_args.
1046
1047         P0631R4 Math Constants
1048         * include/Makefile.am: Add new header.
1049         * include/Makefile.in: Regenerate.
1050         * include/precompiled/stdc++.h: Include new header.
1051         * include/std/numbers: New header.
1052         * include/std/version (__cpp_lib_math_constants): Define.
1053         * testsuite/26_numerics/numbers/1.cc: New test.
1054         * testsuite/26_numerics/numbers/2.cc: New test.
1055         * testsuite/26_numerics/numbers/3.cc: New test.
1056         * testsuite/26_numerics/numbers/nonfloat_neg.cc: New test.
1057
1058         * include/std/bit: Add Doxygen comments.
1059
1060         PR libstdc++/91308
1061         * include/bits/unique_ptr.h (unique_ptr::__safe_conversion_up): Remove
1062         constraints on deleter that should only apply to the constructor.
1063         (unique_ptr<T[], D>::__safe_conversion_up): Likewise.
1064         (unique_ptr<T[], D>::unique_ptr(unique_ptr<U, D>&&)): Restore
1065         constraints on deleter here.
1066         * testsuite/20_util/unique_ptr/assign/91308.cc: New test.
1067
1068 2019-07-29  Jonathan Wakely  <jwakely@redhat.com>
1069
1070         PR libstdc++/51333
1071         * libsupc++/cxxabi.h (__gnu_cxx::recursive_init_error): Do not define
1072         constructor inline.
1073         * libsupc++/guard_error.cc (__gnu_cxx::recursive_init_error): Define
1074         constructor.
1075         * testsuite/18_support/51333.cc: New test.
1076
1077 2019-07-28  Gerald Pfeifer  <gerald@pfeifer.com>
1078
1079         * doc/xml/manual/documentation_hacking.xml: Fix broken reference
1080         to the Doxygen manual. Avoid a "here" link on the way.
1081         Fix another broken link to Doxygen docblocks.
1082
1083 2019-07-26  Jonathan Wakely  <jwakely@redhat.com>
1084
1085         * include/std/bit (__cpp_lib_endian): Define.
1086         * include/std/version (__cpp_lib_endian): Define.
1087         * testsuite/26_numerics/endian/2.cc: New.
1088         * testsuite/26_numerics/endian/3.cc: New.
1089         * testsuite/26_numerics/endian/4.cc: New.
1090
1091 2019-07-26  François Dumont  <fdumont@gcc.gnu.org>
1092
1093         * testsuite/util/testsuite_iterators.h
1094         (bidirectional_iterator_wrapper): Fix type comment.
1095         (random_access_iterator_wrapper): Likewise.
1096
1097 2019-07-25  Jonathan Wakely  <jwakely@redhat.com>
1098
1099         * include/std/bit (endian): Move definition here as per P1612R1.
1100         * include/std/type_traits (endian): Remove definition from here.
1101         * testsuite/20_util/endian/1.cc: Rename to ...
1102         * testsuite/26_numerics/endian/1.cc: ... here. Adjust header.
1103
1104 2019-07-25  Martin Liska  <mliska@suse.cz>
1105             Dominik Infuhr  <dominik.infuehr@theobroma-systems.com>
1106
1107         PR c++/23383
1108         * testsuite/ext/bitmap_allocator/check_delete.cc: Add
1109         -fno-allocation-dce.
1110         * testsuite/ext/bitmap_allocator/check_new.cc: Likewise.
1111         * testsuite/ext/new_allocator/check_delete.cc: Likewise.
1112         * testsuite/ext/new_allocator/check_new.cc: Likewise.
1113
1114 2019-07-22  Jonathan Wakely  <jwakely@redhat.com>
1115
1116         * testsuite/26_numerics/bit/bitops.count/*: Rename to ...
1117         * testsuite/26_numerics/bit/bit.count/*: Here.
1118
1119         * include/std/bit (__rotl, __rotr): Change second parameter from
1120         unsigned int to int and handle negative values.
1121         (rotl, rotr): Remove check for __STRICT_ANSI__. Change second
1122         parameter from unsigned int to int. Add nodiscard attribute.
1123         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Rename to ...
1124         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Here. Test negative
1125         shifts.
1126         * testsuite/26_numerics/bit/bitops.rot/rotr.cc: Rename to ...
1127         * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Here. Test negative
1128         shifts.
1129
1130         * include/std/bit (__ceil2): Make unrepresentable results undefined,
1131         as per P1355R2. Add debug assertion. Perform one left shift, not two,
1132         so that out of range values cause undefined behaviour. Ensure that
1133         shift will still be undefined if left operand is promoted.
1134         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Replace checks for
1135         unrepresentable values with checks that they are not core constant
1136         expressions.
1137         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: New test.
1138
1139 2019-07-19  François Dumont  <fdumont@gcc.gnu.org>
1140
1141         * include/bits/stl_tempbuf.h (__detail::__return_temporary_buffer): Fix
1142         sized deallocation size computation.
1143
1144 2019-07-19  Andreas Schwab  <schwab@linux-m68k.org>
1145
1146         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
1147
1148 2019-07-18  François Dumont  <fdumont@gcc.gnu.org>
1149
1150         * include/bits/stl_tempbuf.h (__detail::__return_temporary_buffer): New.
1151         (~_Temporary_buffer()): Use latter.
1152         (_Temporary_buffer(_FIterator, size_type)): Likewise.
1153
1154 2019-07-17  Andreas Schwab  <schwab@suse.de>
1155
1156         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.
1157
1158 2019-07-16  Jason Merrill  <jason@redhat.com>
1159
1160         * include/std/memory (uses_allocator_construction_args): Add parens
1161         around constraint.
1162
1163 2019-07-12  Jonathan Wakely  <jwakely@redhat.com>
1164
1165         * testsuite/29_atomics/atomic_float/1.cc: Fix comment.
1166
1167         * include/experimental/string_view (__detail::__idt): Remove.
1168         (operator==, operator!=, operator<, operator>, operator<=, operator>=):
1169         Use __type_identity_t instead of __detail::__idt;
1170         * include/std/string_view (__detail::__idt): Remove.
1171         (operator==, operator!=, operator<, operator>, operator<=, operator>=):
1172         Use __type_identity_t instead of __detail::__idt;
1173         * include/std/type_traits (__type_identity_t): New alias template.
1174
1175         * doc/xml/manual/status_cxx2020.xml: Update status for atomic_ref
1176         and floating point atomics.
1177
1178 2019-07-11  Jonathan Wakely  <jwakely@redhat.com>
1179
1180         * doc/xml/manual/configure.xml: Improve documentation of
1181         --enable-libstdcxx-time option.
1182
1183         * include/bits/atomic_base.h (__atomic_impl): New namespace for
1184         wrappers around atomic built-ins.
1185         (__atomic_float, __atomic_ref): New class templates for use as base
1186         classes.
1187         * include/std/atomic (atomic<float>, atomic<double>)
1188         (atomic<long double>): New explicit specializations.
1189         (atomic_ref): New class template.
1190         (__cpp_lib_atomic_ref): Define.
1191         * include/std/version (__cpp_lib_atomic_ref): Define.
1192         * testsuite/29_atomics/atomic/60695.cc: Adjust dg-error.
1193         * testsuite/29_atomics/atomic_float/1.cc: New test.
1194         * testsuite/29_atomics/atomic_float/requirements.cc: New test.
1195         * testsuite/29_atomics/atomic_ref/deduction.cc: New test.
1196         * testsuite/29_atomics/atomic_ref/float.cc: New test.
1197         * testsuite/29_atomics/atomic_ref/generic.cc: New test.
1198         * testsuite/29_atomics/atomic_ref/integral.cc: New test.
1199         * testsuite/29_atomics/atomic_ref/pointer.cc: New test.
1200         * testsuite/29_atomics/atomic_ref/requirements.cc: New test.
1201
1202 2019-07-06  Jonathan Wakely  <jwakely@redhat.com>
1203
1204         * include/ext/atomicity.h (__exchange_and_add, __atomic_add): Replace
1205         throw() with _GLIBCXX_NOTHROW.
1206         (__atomic_add_dispatch): Return after performing atomic increment.
1207
1208 2019-07-05  Jonathan Wakely  <jwakely@redhat.com>
1209
1210         * include/ext/atomicity.h [_GLIBCXX_ATOMIC_BUILTINS] (__atomic_add)
1211         (__exchange_and_add): Replace static specifier with always_inline
1212         attribute.
1213         (__exchange_and_add_single, __atomic_add_single): Likewise.
1214         (__exchange_and_add_dispatch, __atomic_add_dispatch): Likewise. Also
1215         combine !__gthread_active_p() and !__GTHREADS branches.
1216
1217 2019-07-03  Jonathan Wakely  <jwakely@redhat.com>
1218
1219         PR libstdc++/91067
1220         * acinclude.m4 (libtool_VERSION): Bump to 6:27:0.
1221         * configure: Regenerate.
1222         * config/abi/pre/gnu.ver (GLIBCXX_3.4.27): Add new version. Export
1223         missing symbols.
1224         * testsuite/27_io/filesystem/iterators/91067.cc: New test.
1225         * testsuite/util/testsuite_abi.cc: Add new symbol version.
1226
1227 2019-07-02  Jonathan Wakely  <jwakely@redhat.com>
1228
1229         * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_LAUNDER)
1230         (_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED): Use __has_builtin
1231         instead of __is_identifier to detect Clang support.
1232
1233 2019-07-02  Jim Wilson  <jimw@sifive.com>
1234
1235         * configure.ac (BUILD_PDF): Also test for doxygen, dot, xsltproc,
1236         and xmllint.
1237         * configure: Regenerate.
1238
1239 2019-06-27  Jonathan Wakely  <jwakely@redhat.com>
1240
1241         PR libstdc++/91012
1242         * src/c++17/fs_path.cc (filesystem_error::_Impl): Use a string_view
1243         for the what_arg parameters.
1244         (filesystem_error::filesystem_error): Pass system_error::what() to
1245         the _Impl constructor.
1246         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Ensure that
1247         filesystem_error::what() contains system_error::what().
1248
1249 2019-06-26  Jonathan Wakely  <jwakely@redhat.com>
1250
1251         * include/std/charconv (chars_format): Define bitmask type.
1252         * testsuite/20_util/to_chars/chars_format.cc: New test.
1253
1254         * include/bits/fs_path.h (path::__is_encoded_char): Use __is_one_of.
1255         * include/std/bit (_If_is_unsigned_integer_type): Remove.
1256         (_If_is_unsigned_integer): Use __is_unsigned_integer.
1257         (rotl(byte, unsigned), rotr(byte, unsigned), countl_zero(byte))
1258         (countl_one(byte), countr_zero(byte), countr_one(byte))
1259         (popcount(byte), ispow2(byte), ceil2(byte), floor2(byte))
1260         (log2p1(byte)): Remove.
1261         * include/std/charconv (__detail::__is_one_of): Move to <type_traits>.
1262         (__detail::__is_int_to_chars_type): Remove.
1263         (__detail::__integer_to_chars_result_type): Use __is_signed_integer
1264         and __is_unsigned_integer.
1265         * include/std/type_traits (__is_one_of): Move here from <charconv>.
1266         (__is_signed_integer, __is_unsigned_integer): New helpers.
1267         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Remove test for
1268         std::byte overload.
1269         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
1270         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
1271         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
1272         * testsuite/26_numerics/bit/bitops.count/countl_one.cc: Likewise.
1273         * testsuite/26_numerics/bit/bitops.count/countl_zero.cc: Likewise.
1274         * testsuite/26_numerics/bit/bitops.count/countr_one.cc: Likewise.
1275         * testsuite/26_numerics/bit/bitops.count/countr_zero.cc: Likewise.
1276         * testsuite/26_numerics/bit/bitops.count/popcount.cc: Likewise.
1277         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Likewise.
1278         * testsuite/26_numerics/bit/bitops.rot/rotr.cc: Likewise.
1279
1280 2019-06-25  Jonathan Wakely  <jwakely@redhat.com>
1281
1282         * include/std/numeric (midpoint(T, T)): Avoid std::abs in constexpr
1283         function.
1284
1285 2019-06-25  Jakub Jelinek  <jakub@redhat.com>
1286
1287         * include/pstl/pstl_config.h (_PSTL_PRAGMA_SIMD_SCAN,
1288         _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN, _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN):
1289         Define to OpenMP 5.0 pragmas even for GCC 10.0+.
1290         (_PSTL_UDS_PRESENT): Define to 1 for GCC 10.0+.
1291
1292 2019-06-24  Jonathan Wakely  <jwakely@redhat.com>
1293
1294         * include/std/numeric (midpoint(T, T)): Change implementation for
1295         floating-point types to avoid incorrect rounding of denormals.
1296         * testsuite/26_numerics/midpoint/floating.cc: Add check for correct
1297         rounding with denormals.
1298         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line numbers.
1299         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
1300
1301         * testsuite/18_support/headers/cfloat/values_c++17.cc: New test.
1302
1303 2019-06-20  Jonathan Wakely  <jwakely@redhat.com>
1304
1305         * acinclude.m4 (GLIBCXX_ENABLE_DEBUG): Only do debug build for final
1306         stage of bootstrap.
1307         * configure: Regenerate.
1308
1309         * include/std/variant (_Variant_storage, _Extra_visit_slot_needed):
1310         Qualify calls to __never_valueless.
1311
1312         * doc/xml/manual/status_cxx2017.xml: Fix outdated reference to
1313         C++17 working draft.
1314
1315         * testsuite/libstdc++-prettyprinters/simple.cc: Use non-palindromic
1316         vector<bool> for test.
1317         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
1318
1319 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
1320
1321         * include/bits/stream_iterator.h (istream_iterator::_M_equal()): Make
1322         private.
1323         (istream_iterator::_M_read()): Do not check stream state before
1324         attempting extraction. Set stream pointer to null when extraction
1325         fails (P0738R2).
1326         (operator==(const istream_iterator&, const istream_iterator&)): Change
1327         to be a hidden friend of istream_iterator.
1328         (operator!=(const istream_iterator&, const istream_iterator&)):
1329         Likewise.
1330         (ostream_iterator::ostream_iterator()): Add default constructor.
1331         (ostream_iterator::ostream_iterator(ostream_type*, const C*)): Use
1332         addressof.
1333         * testsuite/24_iterators/istream_iterator/1.cc: New test.
1334         * testsuite/24_iterators/ostream_iterator/1.cc: New test.
1335         * testsuite/24_iterators/ostream_iterator/70766.cc: Also check
1336         constructor taking a string.
1337         * testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
1338         New test.
1339
1340 2019-06-19  Michael Weghorn  <m.weghorn@posteo.de>
1341             Jonathan Wakely  <jwakely@redhat.com>
1342
1343         PR libstdc++/90945
1344         * python/libstdcxx/v6/printers.py (StdVectorPrinter._iterator): Use
1345         values of type bool for vector<bool> elements.
1346         * testsuite/libstdc++-prettyprinters/simple.cc: Test vector<bool>.
1347         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
1348
1349 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
1350
1351         PR libstdc++/90920 partially revert r263433
1352         * include/bits/stl_algo.h (__rotate): Restore checks for empty ranges.
1353         (rotate): Remove checks.
1354         * testsuite/25_algorithms/rotate/90920.cc: New test.
1355
1356         * include/std/numeric (reduce(Iter, Iter, T, BinOp)): Fix value
1357         category used in invocable check.
1358         (reduce(Iter, Iter, T)): Pass initial value as rvalue.
1359         * testsuite/26_numerics/reduce/2.cc: New test.
1360
1361 2019-06-18  Jonathan Wakely  <jwakely@redhat.com>
1362
1363         * include/bits/algorithmfwd.h: Change title of doc group.
1364         * include/bits/stl_algo.h (for_each_n): Add new C++17 algorithm from
1365         P0024R2.
1366         * include/bits/stl_numeric.h: Define doc group and add algos to it.
1367         * include/std/numeric (__is_random_access_iter): New internal trait.
1368         (reduce, transform_reduce, exclusive_scan, inclusive_scan)
1369         (transform_exclusive_scan, transform_inclusive_scan): Likewise.
1370         * testsuite/25_algorithms/for_each/for_each_n.cc: New test.
1371         * testsuite/26_numerics/exclusive_scan/1.cc: New test.
1372         * testsuite/26_numerics/inclusive_scan/1.cc: New test.
1373         * testsuite/26_numerics/reduce/1.cc: New test.
1374         * testsuite/26_numerics/transform_exclusive_scan/1.cc: New test.
1375         * testsuite/26_numerics/transform_inclusive_scan/1.cc: New test.
1376         * testsuite/26_numerics/transform_reduce/1.cc: New test.
1377         * testsuite/util/testsuite_iterators.h (test_container::size()): New
1378         member function.
1379
1380         * include/c_global/cstddef (std::byte): Perform arithmetic operations
1381         in unsigned int to avoid promotion (LWG 2950).
1382
1383 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
1384
1385         * testsuite/20_util/allocator/1.cc: Add sized delete, which fixes a
1386         failure on AIX.
1387
1388         * include/c_global/cmath (__lerp, lerp): Add noexcept (LWG 3201).
1389
1390         PR libstdc++/90281 Fix string conversions for filesystem::path
1391         * include/bits/fs_path.h (u8path) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
1392         Use codecvt_utf8_utf16 instead of codecvt_utf8. Use
1393         __str_codecvt_in_all to fail for partial conversions and throw on
1394         error.
1395         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS && _GLIBCXX_USE_CHAR8_T]
1396         (path::_Cvt<char8_t>): Add explicit specialization.
1397         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Remove
1398         overloads.
1399         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
1400         if-constexpr instead of dispatching to _S_wconvert. Use codecvt
1401         instead of codecvt_utf8. Use __str_codecvt_in_all and
1402         __str_codecvt_out_all.
1403         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
1404         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
1405         (path::_S_str_convert) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
1406         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
1407         with allocator. Use __str_codecvt_out_all. Fallthrough to POSIX code
1408         after converting to UTF-8.
1409         (path::_S_str_convert): Use codecvt instead of codecvt_utf8. Use
1410         __str_codecvt_in_all.
1411         (path::string): Fix initialization of string types with different
1412         allocators.
1413         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
1414         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
1415         * include/bits/locale_conv.h (__do_str_codecvt): Reorder static and
1416         runtime conditions.
1417         (__str_codecvt_out_all, __str_codecvt_in_all): New functions that
1418         return false for partial conversions.
1419         * include/experimental/bits/fs_path.h (u8path):
1420         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Implement correctly for mingw.
1421         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Add
1422         missing handling for char8_t. Use codecvt and codecvt_utf8_utf16
1423         instead of codecvt_utf8. Use __str_codecvt_in_all and
1424         __str_codecvt_out_all.
1425         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
1426         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
1427         (path::string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
1428         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
1429         with allocator. Use __str_codecvt_out_all and __str_codecvt_in_all.
1430         (path::string) [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
1431         __str_codecvt_in_all.
1432         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
1433         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
1434         * src/c++17/fs_path.cc (path::_S_convert_loc): Use
1435         __str_codecvt_in_all.
1436         * src/filesystem/path.cc (path::_S_convert_loc): Likewise.
1437         * testsuite/27_io/filesystem/path/construct/90281.cc: New test.
1438         * testsuite/27_io/filesystem/path/factory/u8path.cc: New test.
1439         * testsuite/27_io/filesystem/path/native/string.cc: Test with empty
1440         strings and with Unicode characters outside the basic multilingual
1441         plane.
1442         * testsuite/27_io/filesystem/path/native/alloc.cc: New test.
1443         * testsuite/experimental/filesystem/path/construct/90281.cc: New test.
1444         * testsuite/experimental/filesystem/path/factory/u8path.cc: New test.
1445         * testsuite/experimental/filesystem/path/native/alloc.cc: New test.
1446         * testsuite/experimental/filesystem/path/native/string.cc: Test with
1447         empty strings and with Unicode characters outside the basic
1448         multilingual plane.
1449
1450 2019-06-17  François Dumont  <fdumont@gcc.gnu.org>
1451             Jonathan Wakely  <jwakely@redhat.com>
1452
1453         * include/bits/hashtable.h (struct _Hashtable::_Scoped_node): New type.
1454         (_Hashtable::_M_insert_unique_node): Add key_type parameter. Don't
1455         deallocate node if insertion fails.
1456         (_Hashtable::_M_insert_multi_node): Likewise.
1457         (_Hashtable::_M_reinsert_node): Pass additional key argument.
1458         (_Hashtable::_M_reinsert_node_multi): Likewise. Remove FIXME.
1459         (_Hashtable::_M_extract_node(size_t, __node_base*)): New function.
1460         (_Hashtable::extract(const_iterator)): Use _M_extract_node.
1461         (_Hashtable::extract(const _Key&)): Likewise.
1462         (_Hashtable::_M_merge_unique): Pass additional key argument.
1463         (_Hashtable::_M_emplace<Args>(true_type, Args&&...)): Likewise. Use
1464         _Scoped_node.
1465         (_Hashtable::_M_insert): Likewise.
1466         * include/bits/hashtable_policy.h (_Map_base::operator[]): Likewise.
1467         (_Hashtable_alloc): Add comments to functions with misleading names.
1468
1469 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
1470
1471         * testsuite/20_util/bad_function_call/what.cc: Include <string> header
1472         for std::string.
1473         * testsuite/20_util/shared_ptr/cons/weak_ptr_expired.cc: Likewise.
1474         * testsuite/20_util/tuple/cons/allocator_with_any.cc: Include <memory>
1475         header for std::allocator.
1476         * testsuite/23_containers/array/tuple_interface/tuple_element.cc: Add
1477         using-declaration for std::size_t.
1478         * testsuite/23_containers/array/tuple_interface/tuple_size.cc:
1479         Likewise.
1480         * testsuite/23_containers/deque/cons/55977.cc: Include <istream> for
1481         std::istream.
1482         * testsuite/23_containers/vector/cons/55977.cc: Likewise.
1483         * testsuite/experimental/map/erasure.cc: Include <string> for
1484         std::string.
1485         * testsuite/experimental/unordered_map/erasure.cc: Likewise.
1486
1487 2019-06-14  Jonathan Wakely  <jwakely@redhat.com>
1488
1489         * include/experimental/type_traits (experimental::nonesuch): Use
1490         pragma to disable -Wctor-dtor-privacy warnings.
1491         * include/std/type_traits (__is_convertible_helper<From, To, false>)
1492         (__is_nt_convertible_helper<From, To, false>, __nonesuch): Likewise.
1493
1494         * include/std/version (__cpp_lib_bind_front): Add missing macro.
1495
1496 2019-06-12  Jonathan Wakely  <jwakely@redhat.com>
1497
1498         * include/std/algorithm (__cpp_lib_parallel_algorithm): Fix value.
1499         * include/std/memory (__cpp_lib_parallel_algorithm): Likewise.
1500         * include/std/numeric (__cpp_lib_parallel_algorithm): Likewise.
1501         * testsuite/25_algorithms/pstl/feature_test.cc: New test.
1502
1503         * include/std/variant (get<T>, get<N>, get_if<N>, get_if<T>)
1504         (variant::emplace): Change static_assert messages from "should be"
1505         to "must be".
1506         (hash<monostate>::operator()): Remove name of unused parameter.
1507
1508         * include/std/mutex (scoped_lock::~scoped_lock()): Use fold
1509         expression.
1510
1511         * include/Makefile.am: Add new <bits/charconv.h> header.
1512         * include/Makefile.in: Regenerate.
1513         * include/bits/basic_string.h (to_string(int), to_string(unsigned))
1514         (to_string(long), to_string(unsigned long), to_string(long long))
1515         (to_string(unsigned long long)): Rewrite to use __to_chars_10_impl.
1516         * include/bits/charconv.h: New header.
1517         (__detail::__to_chars_len): Move here from <charconv>.
1518         (__detail::__to_chars_10_impl): New function extracted from
1519         __detail::__to_chars_10.
1520         * include/std/charconv (__cpp_lib_to_chars): Add, but comment out.
1521         (__to_chars_unsigned_type): New class template that reuses
1522         __make_unsigned_selector_base::__select to pick a type.
1523         (__unsigned_least_t): Redefine as __to_chars_unsigned_type<T>::type.
1524         (__detail::__to_chars_len): Move to new header.
1525         (__detail::__to_chars_10): Add inline specifier. Move code doing the
1526         output to __detail::__to_chars_10_impl and call that.
1527         * include/std/version (__cpp_lib_to_chars): Add, but comment out.
1528         * testsuite/21_strings/basic_string/numeric_conversions/char/
1529         to_string.cc: Fix reference in comment. Remove unused variable.
1530         * testsuite/21_strings/basic_string/numeric_conversions/char/
1531         to_string_int.cc: New test.
1532
1533 2019-06-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
1534
1535         Fix ConstexprIterator requirements tests - No constexpr algorithms!
1536         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
1537         Replace copy with hand-rolled loop.
1538         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
1539         Ditto.
1540
1541 2019-06-08  Edward Smith-Rowland  <3dw4rd@verizon.net>
1542
1543         Test for C++20 p0858 - ConstexprIterator requirements.
1544         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
1545         New test.
1546         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
1547         New test.
1548
1549 2019-06-07  Thomas Rodgers  <trodgers@redhat.com>
1550
1551         Rename PSTL macro's consistent with libstdc++ (and llvm upstream
1552         project) standards.
1553         * include/bits/c++config: Rename all macros of the form __PSTL* to
1554         _PSTL*.
1555         * include/std/algorithm: Likewise.
1556         * include/std/execution: Likewise.
1557         * include/std/numeric: Likewise.
1558         * include/std/memory: Likewise.
1559         * include/pstl/glue_memory_impl.h: Likewise.
1560         * include/pstl/numeric_impl.h: Likewise.
1561         * include/pstl/glue_memory_defs.h: Likewise.
1562         * include/pstl/execution_defs.h: Likewise.
1563         * include/pstl/utils.h: Likewise.
1564         * include/pstl/algorithm_fwd.h: Likewise.
1565         * include/pstl/unseq_backend_simd.h: Likewise.
1566         * include/pstl/glue_execution_defs.h: Likewise.
1567         * include/pstl/algorithm_impl.h: Likewise.
1568         * include/pstl/parallel_impl.h: Likewise.
1569         * include/pstl/memory_impl.h: Likewise.
1570         * include/pstl/glue_numeric_defs.h: Likewise.
1571         * include/pstl/parallel_backend_utils.h: Likewise.
1572         * include/pstl/glue_algorithm_defs.h: Likewise.
1573         * include/pstl/parallel_backend.h: Likewise.
1574         * include/pstl/glue_numeric_impl.h: Likewise.
1575         * include/pstl/parallel_backend_tbb.h: Likewise.
1576         * include/pstl/numeric_fwd.h: Likewise.
1577         * include/pstl/glue_algorithm_impl.h: Likewise.
1578         * include/pstl/execution_impl.h: Likewise.
1579         * include/pstl/pstl_config.h: Likewise.
1580         * testsuite/util/pstl/pstl_test_config.h: Likewise.
1581         * testsuite/util/pstl/test_utils.h: Likewise.
1582         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
1583         Likewise.
1584         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
1585         Likewise.
1586         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
1587         Likewise.
1588         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: Likewise.
1589         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: Likewise.
1590         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: Likewise.
1591         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: Likewise.
1592         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
1593         Likewise.
1594         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: Likewise.
1595         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: Likewise.
1596         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: Likewise.
1597         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: Likewise.
1598         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
1599         Likewise.
1600         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: Likewise.
1601         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: Likewise.
1602         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: Likewise.
1603         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: Likewise.
1604         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
1605         Likewise.
1606         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: Likewise.
1607         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: Likewise.
1608         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
1609         Likewise.
1610         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
1611         Likewise.
1612         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: Likewise.
1613         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
1614         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
1615         Likewise.
1616         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
1617         Likewise.
1618         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
1619         Likewise.
1620         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
1621         Likewise.
1622         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
1623         Likewise.
1624         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
1625         Likewise.
1626         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
1627         Likewise.
1628         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
1629         Likewise.
1630         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
1631         Likewise.
1632         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
1633         Likewise.
1634         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
1635         Likewise.
1636         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: Likewise.
1637
1638         Rename header guards to be consistent with upstream project's
1639         conventions.
1640         * include/pstl/glue_memory_impl.h: Rename all macros of the form
1641         _PSTL_(.*)_H to _PSTL_\U\1_H.
1642         * include/pstl/numeric_impl.h: Likewise.
1643         * include/pstl/glue_memory_defs.h: Likewise.
1644         * include/pstl/execution_defs.h: Likewise.
1645         * include/pstl/utils.h: Likewise.
1646         * include/pstl/algorithm_fwd.h: Likewise.
1647         * include/pstl/unseq_backend_simd.h: Likewise.
1648         * include/pstl/glue_execution_defs.h: Likewise.
1649         * include/pstl/algorithm_impl.h: Likewise.
1650         * include/pstl/parallel_impl.h: Likewise.
1651         * include/pstl/memory_impl.h: Likewise.
1652         * include/pstl/glue_numeric_defs.h: Likewise.
1653         * include/pstl/parallel_backend_utils.h: Likewise.
1654         * include/pstl/glue_algorithm_defs.h: Likewise.
1655         * include/pstl/parallel_backend.h: Likewise.
1656         * include/pstl/glue_numeric_impl.h: Likewise.
1657         * include/pstl/parallel_backend_tbb.h: Likewise.
1658         * include/pstl/numeric_fwd.h: Likewise.
1659         * include/pstl/glue_algorithm_impl.h: Likewise.
1660         * include/pstl/execution_impl.h: Likewise.
1661         * include/pstl/pstl_config.h: Likewise.
1662         * testsuite/util/pstl/pstl_test_config.h: Likewise.
1663
1664         Synchronize libstdc++ parallel algorithms with upstream
1665         project.
1666         * include/pstl/algorithm_fwd.h: Synchronize with
1667         upstream PSTL project.
1668         * include/pstl/algorithm_impl.h: Likewise.
1669         * include/pstl/execution_defs.h: Likewise.
1670         * include/pstl/execution_impl.h: Likewise.
1671         * include/pstl/glue_algorithm_impl.h: Likewise.
1672         * include/pstl/glue_execution_defs.h: Likewise.
1673         * include/pstl/numeric_fwd.h: Likewise.
1674         * include/pstl/numeric_impl.h: Likewise.
1675         * include/pstl/parallel_backend.h: Likewise.
1676         * include/pstl/pstl_config.h: Likewise.
1677         * include/pstl/unseq_backend_simd.h: Likewise.
1678         * include/pstl/parallel_backend_serial.h: New file.
1679         * include/Makefile.am (pstl_headers): Add
1680         parallel_backend_serial.h.
1681         * include/Makefile.in: Regenerate.
1682
1683         Clean up non-conforming names
1684         * include/pstl/algorithm_impl.h (__parallel_set_union_op):
1685         Uglfiy copy_range1 and copy_range2
1686         (__pattern_walk2_n): Rename local n to __n
1687         * include/pstl/parallel_backend_tbb.h (struct __binary_no_op):
1688         Rename parameter _T to _Tp.
1689
1690         Integrate non-TBB serial backend support
1691         * include/bits/c++config: Adjust TBB detection logic to select serial
1692         PSTL backend if no TBB present.
1693         * testsuite/utils/pstl/test_utils.h: Remove check for
1694         _PSTL_USE_PAR_POLICIES
1695
1696 2019-06-07  Jonathan Wakely  <jwakely@redhat.com>
1697
1698         * testsuite/24_iterators/container_access.cc: Move dg-options before
1699         dg-do directive so the target check uses the -std option.
1700
1701         PR libstdc++/90770
1702         * configure: Regenerate.
1703         * src/Makefile.am (stamp-debug): Also test for missing makefile.
1704         * src/Makefile.in: Regenerate.
1705
1706 2019-06-06  Jonathan Wakely  <jwakely@redhat.com>
1707
1708         * include/std/array: Do not include <stdexcept>.
1709         * include/std/optional: Include <exception> and
1710         <bits/exception_defines.h> instead of <stdexcept>.
1711         * testsuite/20_util/function_objects/searchers.cc: Include <cctype>
1712         for std::isalnum.
1713         * testsuite/20_util/tuple/cons/deduction.cc: Include <memory> for
1714         std::allocator.
1715         * testsuite/23_containers/map/erasure.cc: Include <string>.
1716         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
1717
1718         * testsuite/23_containers/deque/requirements/dr438/assign_neg.cc: Add
1719         dg-prune-output for different C++98 diagnostic.
1720         * testsuite/23_containers/deque/requirements/dr438/constructor_1_neg.cc:
1721         Likewise.
1722         * testsuite/23_containers/deque/requirements/dr438/constructor_2_neg.cc:
1723         Likewise.
1724         * testsuite/23_containers/deque/requirements/dr438/insert_neg.cc:
1725         Likewise.
1726         * testsuite/23_containers/list/requirements/dr438/assign_neg.cc:
1727         Likewise.
1728         * testsuite/23_containers/list/requirements/dr438/constructor_1_neg.cc:
1729         Likewise.
1730         * testsuite/23_containers/list/requirements/dr438/constructor_2_neg.cc:
1731         Likewise.
1732         * testsuite/23_containers/list/requirements/dr438/insert_neg.cc:
1733         Likewise.
1734         * testsuite/23_containers/vector/requirements/dr438/assign_neg.cc:
1735         Likewise.
1736         * testsuite/23_containers/vector/requirements/dr438/
1737         constructor_1_neg.cc: Likewise.
1738         * testsuite/23_containers/vector/requirements/dr438/
1739         constructor_2_neg.cc: Likewise.
1740         * testsuite/23_containers/vector/requirements/dr438/insert_neg.cc:
1741         Likewise.
1742         * testsuite/libstdc++-prettyprinters/compat.cc: Do not run for C++98.
1743
1744         * testsuite/23_containers/unordered_map/requirements/debug_container.cc:
1745         Do not test allocator rebinding extension for C++2a.
1746         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
1747         dg-do directive for C++17 and C++2a.
1748
1749         * testsuite/23_containers/deque/requirements/explicit_instantiation/
1750         1_c++0x.cc: Remove redundant test.
1751         * testsuite/23_containers/deque/requirements/explicit_instantiation/
1752         2.cc: Use target selector instead of preprocessor condition.
1753         * testsuite/23_containers/deque/requirements/explicit_instantiation/
1754         3.cc: Do not run test for C++2a.
1755         * testsuite/23_containers/forward_list/requirements/
1756         explicit_instantiation/3.cc: Likewise.
1757         * testsuite/23_containers/forward_list/requirements/
1758         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1759         for C++2a.
1760         * testsuite/23_containers/list/requirements/explicit_instantiation/
1761         1_c++0x.cc: Remove redundant test.
1762         * testsuite/23_containers/list/requirements/explicit_instantiation/
1763         2.cc: Use target selector instead of preprocessor condition.
1764         * testsuite/23_containers/list/requirements/explicit_instantiation/
1765         3.cc: Do not run test for C++2a.
1766         * testsuite/23_containers/list/requirements/explicit_instantiation/
1767         5.cc: Do not test allocator rebinding extension for C++2a.
1768         * testsuite/23_containers/map/requirements/explicit_instantiation/
1769         1_c++0x.cc: Remove redundant test.
1770         * testsuite/23_containers/map/requirements/explicit_instantiation/
1771         2.cc: Adjust comment.
1772         * testsuite/23_containers/map/requirements/explicit_instantiation/
1773         3.cc: Do not run test for C++2a.
1774         * testsuite/23_containers/map/requirements/explicit_instantiation/
1775         5.cc: Do not test allocator rebinding extension for C++2a.
1776         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
1777         1_c++0x.cc: Remove redundant test.
1778         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
1779         3.cc: Do not run test for C++2a.
1780         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
1781         5.cc: Do not test allocator rebinding extension for C++2a.
1782         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
1783         3.cc: Do not run test for C++2a.
1784         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
1785         5.cc: Do not test allocator rebinding extension for C++2a.
1786         * testsuite/23_containers/set/requirements/explicit_instantiation/3.cc:
1787         Do not run test for C++2a.
1788         * testsuite/23_containers/set/requirements/explicit_instantiation/
1789         1_c++0x.cc: Remove redundant test.
1790         * testsuite/23_containers/set/requirements/explicit_instantiation/5.cc:
1791         Do not test allocator rebinding extension for C++2a.
1792         * testsuite/23_containers/unordered_map/requirements/
1793         explicit_instantiation/3.cc: Likewise.
1794         * testsuite/23_containers/unordered_map/requirements/
1795         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1796         for C++2a.
1797         * testsuite/23_containers/unordered_multimap/requirements/
1798         explicit_instantiation/3.cc: Do not run test for C++2a.
1799         * testsuite/23_containers/unordered_multimap/requirements/
1800         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1801         for C++2a.
1802         * testsuite/23_containers/unordered_multiset/requirements/
1803         explicit_instantiation/3.cc: Do not run test for C++2a.
1804         * testsuite/23_containers/unordered_multiset/requirements/
1805         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1806         for C++2a.
1807         * testsuite/23_containers/unordered_set/requirements/
1808         explicit_instantiation/3.cc: Do not run test for C++2a.
1809         * testsuite/23_containers/unordered_set/requirements/
1810         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1811         for C++2a.
1812         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
1813         2.cc: Remove redundant test.
1814         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
1815         3.cc: Do not run test for C++2a.
1816         * testsuite/23_containers/vector/requirements/explicit_instantiation/
1817         3.cc: Likewise.
1818
1819         * include/std/type_traits (is_empty, is_polymorphic, is_final)
1820         (is_abstract, is_aggregate): Remove static_assert.
1821         * testsuite/20_util/is_abstract/incomplete_neg.cc: Check for error
1822         from builtin only.
1823         * testsuite/20_util/is_aggregate/incomplete_neg.cc: Likewise. Add
1824         missing -std=gnu++17 option.
1825         * testsuite/20_util/is_empty/incomplete_neg.cc: New test.
1826         * testsuite/20_util/is_final/incomplete_neg.cc: New test.
1827         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: Check for error
1828         from builtin only.
1829
1830         * testsuite/18_support/set_terminate.cc: Do not run for C++98 mode.
1831         * testsuite/18_support/set_unexpected.cc: Likewise.
1832         * testsuite/20_util/is_nothrow_invocable/value.cc: Test converting to
1833         void.
1834         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix constexpr
1835         function to be valid in C++11.
1836         * testsuite/26_numerics/complex/proj.cc: Do not run for C++98 mode.
1837         * testsuite/experimental/names.cc: Do not run for C++98 mode. Do not
1838         include Library Fundamentals or Networking headers in C++11 mode.
1839         * testsuite/ext/char8_t/atomic-1.cc: Do not run for C++98 mode.
1840
1841         * include/std/tuple (_TC): Replace with _TupleConstraints.
1842         (_TupleConstraints): New helper for SFINAE constraints, with more
1843         expressive member functions to reduce duplication when used.
1844         (tuple::_TC2, tuple::_TMC, tuple::_TNTC): Remove.
1845         (tuple::_TCC): Replace dummy type parameter with bool non-type
1846         parameter that can be used to check the pack size.
1847         (tuple::_ImplicitDefaultCtor, tuple::_ExplicitDefaultCtor)
1848         (tuple::_ImplicitCtor, tuple::_ExplicitCtor): New alias templates for
1849         checking constraints in constructors.
1850         (tuple::__valid_args, tuple::_UseOtherCtor, tuple::__use_other_ctor):
1851         New SFINAE helpers.
1852         (tuple::tuple): Use new helpers to reduce repitition in constraints.
1853         (tuple::tuple(allocator_arg_t, const Alloc&)): Constrain.
1854         (tuple<T1, T2>::_TCC, tuple<T1, T2>::_ImplicitDefaultCtor)
1855         (tuple<T1, T2>::_ExplicitDefaultCtor, tuple<T1, T2>::_ImplicitCtor)
1856         (tuple<T1, T2>::_ExplicitCtor): New alias templates for checking
1857         constraints in constructors.
1858         (tuple::__is_alloc_arg()): New SFINAE helpers.
1859         (tuple<T1, T2>::tuple): Use new helpers to reduce repitition in
1860         constraints.
1861         (tuple<T1, T2>::tuple(allocator_arg_t, const Alloc&)): Constrain.
1862         * testsuite/20_util/tuple/cons/90700.cc: New test.
1863         * testsuite/20_util/tuple/cons/allocators.cc: Add default constructor
1864         to meet new constraint on allocator-extended default constructor.
1865
1866 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
1867
1868         * include/bits/stl_map.h (map): Disable static assert for C++98 mode.
1869         * include/bits/stl_multimap.h (multimap): Likewise.
1870
1871 2019-06-03  François Dumont  <fdumont@gcc.gnu.org>
1872
1873         Rename variables and cleanup comments.
1874         * include/bits/hashtable_policy.h
1875         * include/bits/hashtable.h
1876
1877 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
1878
1879         * doc/xml/manual/status_cxx2020.xml: Add missing row for P0920R2.
1880         Fix bgcolor for P0340R3.
1881         * doc/html/*: Regenerate.
1882
1883         PR libstdc++/90686
1884         * doc/xml/manual/status_cxx2014.xml: Document what's missing from
1885         <experimental/memory_resource>.
1886         * doc/xml/manual/status_cxx2020.xml: Document status of P1285R0,
1887         P0339R6, P0340R3, P1164R1 and P1357R1.
1888         * doc/html/*: Regenerate.
1889
1890         * doc/xml/manual/status_cxx2020.xml: Document P1463R1 status.
1891         * include/bits/forward_list.h [__cplusplus > 201703]: Enable
1892         allocator::value_type assertion for C++2a.
1893         * include/bits/hashtable.h: Likewise.
1894         * include/bits/stl_deque.h: Likewise.
1895         * include/bits/stl_list.h: Likewise.
1896         * include/bits/stl_map.h: Likewise.
1897         * include/bits/stl_multimap.h: Likewise.
1898         * include/bits/stl_multiset.h: Likewise.
1899         * include/bits/stl_set.h: Likewise.
1900         * include/bits/stl_vector.h: Likewise.
1901         * testsuite/23_containers/deque/48101-3_neg.cc: New test.
1902         * testsuite/23_containers/forward_list/48101-3_neg.cc: New test.
1903         * testsuite/23_containers/list/48101-3_neg.cc: New test.
1904         * testsuite/23_containers/map/48101-3_neg.cc: New test.
1905         * testsuite/23_containers/multimap/48101-3_neg.cc: New test.
1906         * testsuite/23_containers/multiset/48101-3_neg.cc: New test.
1907         * testsuite/23_containers/set/48101-3_neg.cc: New test.
1908         * testsuite/23_containers/unordered_map/48101-3_neg.cc: New test.
1909         * testsuite/23_containers/unordered_multimap/48101-3_neg.cc: New test.
1910         * testsuite/23_containers/unordered_multiset/48101-3_neg.cc: New test.
1911         * testsuite/23_containers/unordered_set/48101-3_neg.cc: New test.
1912         * testsuite/23_containers/vector/48101-3_neg.cc: New test.
1913
1914 2019-05-31  Gerald Pfeifer  <gerald@pfeifer.com>
1915
1916         * doc/xml/manual/allocator.xml: Move hoard.org back to http.
1917
1918 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
1919
1920         * include/std/tuple (tuple<>): Add noexcept to allocator-extended
1921         constructors.
1922         (tuple<T1, T2>::__nothrow_default_constructible()): New helper
1923         function.
1924         (tuple<T1, T2>::tuple(), explicit tuple<T1, T2>::tuple()): Use helper.
1925
1926 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
1927
1928         * src/c++98/bitmap_allocator.cc: Add using-declaration for size_t.
1929
1930         PR libstdc++/90682
1931         * libsupc++/eh_term_handler.cc: Include eh_term_handler.h to get
1932         definition of _GLIBCXX_DEFAULT_TERM_HANDLER.
1933         * libsupc++/eh_term_handler.h: New header defining
1934         _GLIBCXX_DEFAULT_TERM_HANDLER.
1935         * libsupc++/eh_terminate.cc: Include eh_term_handler.h.
1936         (set_terminate): Restore default handler when argument is null.
1937         (set_unexpected): Likewise.
1938         * testsuite/18_support/set_terminate.cc: New test.
1939         * testsuite/18_support/set_unexpected.cc: New test.
1940
1941         * include/backward/hashtable.h (size_t, ptrdiff_t)
1942         (forward_iterator_tag, input_iterator_tag, _Construct, _Destroy)
1943         (distance, vector, pair, __iterator_category): Remove
1944         using-declarations that add these names to namespace __gnu_cxx.
1945         * include/ext/bitmap_allocator.h (size_t, ptrdiff_t): Likewise.
1946         * include/ext/debug_allocator.h (size_t): Likewise.
1947         * include/ext/functional (size_t, unary_function, binary_function)
1948         (mem_fun1_t, const_mem_fun1_t, mem_fun1_ref_t, const_mem_fun1_ref_t):
1949         Likewise.
1950         * include/ext/malloc_allocator.h (size_t, ptrdiff_t): Likewise.
1951         * include/ext/memory (ptrdiff_t, pair, __iterator_category): Likewise.
1952         * include/ext/mt_allocator.h (size_t, ptrdiff_t): Likewise.
1953         * include/ext/new_allocator.h (size_t, ptrdiff_t): Likewise.
1954         * include/ext/numeric (iota): Fix outdated comment.
1955         * include/ext/pool_allocator.h (size_t, ptrdiff_t): Likewise.
1956         * include/ext/rb_tree (_Rb_tree, allocator): Likewise.
1957         * include/ext/rope (size_t, ptrdiff_t, allocator, _Destroy): Likewise.
1958         * include/ext/ropeimpl.h (size_t, printf, basic_ostream)
1959         (__throw_length_error, _Destroy, std::__uninitialized_fill_n_a):
1960         Likewise.
1961         * include/ext/slist (size_t, ptrdiff_t, _Construct, _Destroy)
1962         (allocator, __true_type, __false_type): Likewise.
1963
1964 2019-05-31  Antony Polukhin  <antoshkka@gmail.com>
1965
1966         PR libstdc++/71579
1967         * include/std/type_traits __type_identity, __is_complete_or_unbounded):
1968         New helpers for checking preconditions in traits.
1969         (is_trivial, is_trivially_copyable, is_standard_layout, is_pod)
1970         (is_literal_type, is_empty, is_polymorphic, is_final, is_abstract)
1971         (is_destructible, is_nothrow_destructible, is_constructible)
1972         (is_default_constructible, is_copy_constructible)
1973         (is_move_constructible, is_nothrow_default_constructible)
1974         (is_nothrow_constructible, is_nothrow_copy_constructible)
1975         (is_nothrow_move_constructible, is_copy_assignable, is_move_assignable)
1976         (is_nothrow_assignable, is_nothrow_copy_assignable)
1977         (is_nothrow_move_assignable, is_trivially_constructible)
1978         (is_trivially_copy_constructible, is_trivially_move_constructible)
1979         is_trivially_assignable, is_trivially_copy_assignable)
1980         (is_trivially_move_assignable, is_trivially_destructible)
1981         (alignment_of, is_swappable, is_nothrow_swappable, is_invocable)
1982         (is_invocable_r, is_nothrow_invocable)
1983         (has_unique_object_representations, is_aggregate): Add static_asserts
1984         to make sure that type traits are not misused with incomplete types.
1985         (__is_constructible_impl, __is_nothrow_default_constructible_impl)
1986         (__is_nothrow_constructible_impl, __is_nothrow_assignable_impl): New
1987         base characteristics without assertions that can be reused in other
1988         traits.
1989         * testsuite/20_util/is_complete_or_unbounded/memoization.cc: New test.
1990         * testsuite/20_util/is_complete_or_unbounded/memoization_neg.cc: New
1991         test.
1992         * testsuite/20_util/is_complete_or_unbounded/value.cc: New test.
1993         * testsuite/20_util/is_abstract/incomplete_neg.cc: New test.
1994         * testsuite/20_util/is_aggregate/incomplete_neg.cc: New test.
1995         * testsuite/20_util/is_class/value.cc: Check incomplete type.
1996         * testsuite/20_util/is_function/value.cc: Likewise.
1997         * testsuite/20_util/is_move_constructible/incomplete_neg.cc: New test.
1998         * testsuite/20_util/is_nothrow_move_assignable/incomplete_neg.cc: New
1999         test.
2000         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: New test.
2001         * testsuite/20_util/is_reference/value.cc: Check incomplete types.
2002         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
2003         * testsuite/20_util/is_union/value.cc: Likewise.
2004         * testsuite/20_util/is_void/value.cc: Likewise.
2005         * testsuite/util/testsuite_tr1.h: Add incomplete union type.
2006
2007 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
2008
2009         * include/bits/random.h (random_device::_M_init(const char*, size_t)):
2010         Add new private member function.
2011         * src/c++11/cow-string-inst.cc (random_device::_M_init(const string&))
2012         (random_device::_M_init_pretr1(const string&)): Call new private
2013         member with string data.
2014         * src/c++11/random.cc (random_device::_M_init(const char*, size_t)):
2015         Define.
2016         * testsuite/26_numerics/random/random_device/cons/default-cow.cc: New
2017         test using COW strings.
2018         * testsuite/26_numerics/random/random_device/cons/default.cc: Generate
2019         a value from the device.
2020         * testsuite/26_numerics/random/random_device/cons/token.cc: Likewise.
2021         Fix typo in token string.
2022
2023 2019-05-30  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2024
2025         LWG2788 basic_string spurious use of a default constructible allocator
2026         * include/bits/basic_string.tcc [_GLIBCXX_USE_CXX11_ABI]
2027         (basic_string::_M_replace_dispatch): Construct temporary string with
2028         the current allocator.
2029         * testsuite/21_strings/basic_string/allocator/char/lwg2788.cc: New.
2030         * testsuite/21_strings/basic_string/allocator/wchar_t/lwg2788.cc: New.
2031
2032 2019-05-30  Jonathan Wakely  <jwakely@redhat.com>
2033
2034         * doc/xml/manual/diagnostics.xml: Update list of headers that define
2035         exception classes.
2036         * doc/xml/manual/support.xml: Rewrite advice around NULL. Rewrite
2037         section about new/delete overloads. Improve section on verbose
2038         terminate handler.
2039         * doc/html/*: Regenerate.
2040
2041         * doc/xml/manual/status_cxx2020.xml: Add feature-test macro for
2042         P0811R3. Change status of P1353R0.
2043         * doc/html/*: Regenerate.
2044
2045         * doc/xml/manual/status_cxx2011.xml: Use <variablelist> for
2046         documentation of implementation-defined types for [thread.req.native].
2047         * doc/xml/manual/status_cxx2017.xml: Update documentation of
2048         implementation-defined strings for [variant.bad.access]. Fix typo in
2049         documentation of implementation-defined support for [fs.conform.9945].
2050         * doc/html/*: Regenerate.
2051
2052 2019-05-29  Jonathan Wakely  <jwakely@redhat.com>
2053
2054         PR libstdc++/85494
2055         * testsuite/26_numerics/random/random_device/cons/token.cc: Fix test
2056         that fails on mingw-w64.
2057
2058         PR libstdc++/88881
2059         * src/c++17/fs_ops.cc [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
2060         (status(const path&, error_code&)): Use parent_path() to remove
2061         trailing slash.
2062         (symlink_status(const path&, error_code&)): Duplicate workaround for
2063         bug in _wstat for paths with trailing slash.
2064         * testsuite/27_io/filesystem/operations/remove_all.cc: Check path
2065         with trailing slash.
2066         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
2067         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
2068
2069         * src/c++17/fs_path.cc (path::parent_path()): Create whole path at
2070         once instead of building it iteratively.
2071
2072         * testsuite/util/testsuite_api.h: Remove names of unused parameters.
2073
2074         PR libstdc++/85494 use rdseed and rand_s in std::random_device
2075         * acinclude.m4 (GLIBCXX_CHECK_X86_RDSEED): Define macro to check if
2076         the assembler supports rdseed.
2077         * config.h.in: Regenerate.
2078         * configure: Regenerate.
2079         * configure.ac: Use GLIBCXX_CHECK_X86_RDSEED.
2080         * config/os/mingw32-w64/os_defines.h (_GLIBCXX_USE_CRT_RAND_S): Define.
2081         * doc/html/*: Regenerate.
2082         * doc/xml/manual/status_cxx2011.xml: Document new tokens.
2083         * include/bits/random.h (random_device::random_device()): Always call
2084         _M_init rather than _M_init_pretr1.
2085         (random_device::random_device(const string&)): Likewise.
2086         (random_device::operator()()): Always call _M_getval().
2087         (random_device::_M_file): Replace first member of union with an
2088         anonymous struct, with _M_file as its first member.
2089         * src/c++11/random.cc [_GLIBCXX_X86_RDRAND] (USE_RDRAND): Define.
2090         [_GLIBCXX_X86_RDSEED] (USE_RDSEED): Define.
2091         (USE_MT19937): Define if none of the above are defined.
2092         (USE_POSIX_FILE_IO): Define.
2093         (_M_strtoul): Remove.
2094         [USE_RDSEED] (__x86_rdseed): Define new function.
2095         [_GLIBCXX_USE_CRT_RAND_S] (__winxp_rand_s): Define new function.
2096         (random_device::_M_init(const string&)): Initialize new union members.
2097         Add support for "rdseed" and "rand_s" tokens. Decide what the
2098         "default" token does according to which USE_* macros are defined.
2099         [USE_POSIX_FILE_IO]: Store a file descriptor.
2100         [USE_MT19937]: Forward to _M_init_pretr1 instead.
2101         (random_device::_M_init_pretr1(const string&)) [USE_MT19937]: Inline
2102         code from _M_strtoul.
2103         [!USE_MT19937]: Call _M_init, transforming the old default token or
2104         numeric tokens to "default".
2105         (random_device::_M_fini()) [USE_POSIX_FILE_IO]: Use close not fclose.
2106         (random_device::_M_getval()): Use new union members to obtain a
2107         random number from the stored function pointer or file descriptor.
2108         [USE_MT19937]: Obtain a value from the mt19937 engine.
2109         (random_device::_M_getval_pretr1()): Call _M_getval().
2110         (random_device::_M_getentropy()) [USE_POSIX_FILE_IO]: Use _M_fd
2111         instead of fileno.
2112         [!USE_MT19937] (mersenne_twister): Do not instantiate when not needed.
2113         * testsuite/26_numerics/random/random_device/85494.cc: New test.
2114
2115 2019-05-28  Jonathan Wakely  <jwakely@redhat.com>
2116
2117         PR libstdc++/90634
2118         * include/experimental/bits/fs_path.h (path::path(path&&)): Only call
2119         _M_split_cmpts() for a path with multiple components.
2120         (path::_S_is_dir_sep()): Add missing 'static' keyword to function.
2121         * src/filesystem/path.cc (path::_M_split_cmpts()): Count number of
2122         components and reserve space in vector. Return early when there is
2123         only one component.
2124         * testsuite/27_io/filesystem/path/construct/90634.cc: New test.
2125         * testsuite/experimental/filesystem/path/construct/90634.cc: New test.
2126
2127         * testsuite/util/testsuite_fs.h (compare_paths): Use three-argument
2128         form of std::equals for C++11 compatibility.
2129
2130 2019-05-26  Gerald Pfeifer  <gerald@pfeifer.com>
2131
2132         * doc/xml/manual/appendix_contributing.xml: Update pointer to
2133         C++ standard at ansi.org.
2134
2135 2019-05-24  Jonathan Wakely  <jwakely@redhat.com>
2136
2137         * include/std/numeric (midpoint(T*, T*)): Fix incorrect result.
2138         * testsuite/26_numerics/midpoint/pointer.cc: Change "compile" test
2139         to "run".
2140
2141         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: Fix test.
2142         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused function.
2143
2144 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
2145
2146         * testsuite/20_util/function_objects/invoke/1.cc: Move C++17-specific
2147         tests to ...
2148         * testsuite/20_util/function_objects/invoke/3.cc: New test.
2149         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
2150         "compile" test to "run".
2151
2152         * doc/xml/manual/intro.xml: Document LWG DR 2996 change.
2153         * doc/html/*: Regenerate.
2154         * include/bits/shared_ptr.h (shared_ptr(shared_ptr&&, T*)): Add
2155         rvalue aliasing constructor.
2156         (static_pointer_cast, const_pointer, dynamic_pointer_cast)
2157         (reinterpret_pointer_cast): Add overloads taking rvalues.
2158         * include/bits/shared_ptr_base.h (__shared_ptr(__shared_ptr&&, T*)):
2159         Add rvalue aliasing constructor.
2160         * testsuite/20_util/shared_ptr/casts/1.cc: Change "compile" test to
2161         "run" and check return values as well as types.
2162         * testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
2163         * testsuite/20_util/shared_ptr/casts/rval.cc: New test.
2164         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: New test.
2165         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused return
2166         values.
2167
2168         * doc/xml/manual/evolution.xml: Document LWG DR 2921 change.
2169         * doc/xml/manual/intro.xml: Likewise.
2170         * include/std/future (__create_task_state): Add default arguments
2171         to make providing an allocator optional.
2172         (packaged_task::packaged_task(F&&)): Call __create_task_state directly
2173         instead of delegating to another constructor.
2174         (packaged_task::packaged_task(allocator_arg_t, const A&, ...)): Do not
2175         define allocator-extended constructors for C++17 and later.
2176         * testsuite/30_threads/packaged_task/cons/alloc.cc: Only run test for
2177         C++11 and C++14.
2178         * testsuite/30_threads/packaged_task/cons/alloc2.cc: Likewise.
2179         * testsuite/30_threads/packaged_task/cons/alloc_min.cc: Likewise.
2180         * testsuite/30_threads/packaged_task/uses_allocator.cc: Likewise.
2181
2182 2019-05-23  Hans-Peter Nilsson  <hp@axis.com>
2183
2184         * testsuite/26_numerics/random/poisson_distribution/operators/values.cc:
2185         Don't run the libstdc++/83237 part on simulator targets.
2186
2187 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
2188
2189         * doc/xml/manual/status_cxx2017.xml: Add feature test macro for
2190         P0040R3.
2191         * doc/html/*: Regenerate.
2192
2193         * include/experimental/any (__any_caster): Use RTTI if comparing
2194         addresses fails, to support non-unique addresses in shared libraries.
2195         * include/std/any (__any_caster): Likewise.
2196
2197         PR libstdc++/90220
2198         * include/experimental/any (__any_caster): Constrain to only be
2199         callable for object types. Use remove_cv_t instead of decay_t.
2200         If the type decays or isn't copy constructible, compare the manager
2201         function to a dummy specialization.
2202         (__any_caster): Add overload constrained for non-object types.
2203         (any::_Manager_internal<_Op>): Add dummy specialization.
2204         * testsuite/experimental/any/misc/any_cast.cc: Test function types
2205         and array types.
2206
2207 2019-05-22  Jonathan Wakely  <jwakely@redhat.com>
2208
2209         PR libstdc++/90557
2210         * src/c++17/fs_path.cc (path::_List::operator=(const _List&)): Fix
2211         reversed arguments to uninitialized_copy_n.
2212         * testsuite/27_io/filesystem/path/assign/copy.cc: Check that source
2213         is unchanged by copy assignment.
2214         * testsuite/util/testsuite_fs.h (compare_paths): Use std::equal to
2215         compare path components.
2216
2217         PR libstdc++/77691
2218         * include/experimental/memory_resource: Add system header pragma and
2219         do not define anything unless compiled as C++14 or later.
2220         (__resource_adaptor_common::__guaranteed_alignment): Remove.
2221         (__resource_adaptor_imp::do_allocate): If the requested alignment
2222         is a fundamental alignment then either allocate directly from _M_alloc
2223         or call the new _M_allocate function.
2224         (__resource_adaptor_imp::do_deallocate): Likewise for deallocation.
2225         (__resource_adaptor_imp::_M_allocate): New function that uses a copy
2226         of the allocator rebound to a POD type with the specified alignment.
2227         (__resource_adaptor_imp::_M_deallocate): Likewise for deallocation.
2228         * testsuite/experimental/memory_resource/new_delete_resource.cc:
2229         Adjust expected allocation sizes.
2230         * testsuite/experimental/memory_resource/resource_adaptor.cc: Remove
2231         xfail for Solaris x86.
2232
2233 2019-05-21  Thomas Rodgers  <trodgers@redhat.com>
2234
2235         LWG 3062 - Unnecessary decay_t in is_execution_policy_v
2236         * include/pstl/execution_defs.h (__enable_if_execution_policy):
2237         Use std::__remove_cvref_t when building with GCC.
2238
2239 2019-05-21  Jonathan Wakely  <jwakely@redhat.com>
2240
2241         PR libstdc++/90252
2242         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
2243         Use "additional_flags" to pass -ltbb to v3_target_compile command.
2244         Use check_v3_target_prop_cached to cache the result of the test.
2245
2246         * doc/xml/manual/shared_ptr.xml: Fix names of lock policy constants.
2247
2248 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
2249
2250         PR libstdc++/90252
2251         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
2252         Changed v3_target_compile check from preprocess to executable.
2253         Added "-ltbb" to v3_target_compile flags.
2254
2255 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
2256
2257         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
2258         Add check for Thread Building Blocks 2018 or later.
2259
2260 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
2261
2262         * testsuite/experimental/names.cc: Only include Networking TS headers
2263         on targets with the necessary Gthreads support.
2264
2265 2019-05-20  Marek Polacek  <polacek@redhat.com>
2266
2267         CWG 2094 - volatile scalars are trivially copyable.
2268         PR c++/85679
2269         * testsuite/20_util/is_trivially_copyable/value.cc: Change the expected
2270         result for volatile int.
2271
2272 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
2273
2274         * testsuite/17_intro/names.cc: Do not check 'ptr' on Solaris.
2275         * testsuite/experimental/names.cc: Include <experimental/filesystem>
2276         conditionally.
2277
2278         PR c++/90532 Ensure __is_constructible(T[]) is false
2279         * include/std/type_traits (__do_is_default_constructible_impl)
2280         (__is_default_constructible_atom, __is_default_constructible_safe):
2281         Remove.
2282         (is_default_constructible): Use is_constructible.
2283         * testsuite/20_util/is_constructible/value.cc: Check int[] case.
2284         * testsuite/20_util/is_default_constructible/value.cc: Likewise.
2285         * testsuite/20_util/is_trivially_constructible/value.cc: Likewise.
2286         * testsuite/20_util/is_trivially_default_constructible/value.cc:
2287         Likewise.
2288
2289 2019-05-20  Pádraig Brady  <pbrady@fb.com>
2290
2291         * libstdc++-v3/include/ext/new_allocator.h (deallocate): Pass the size
2292         to the deallocator with -fsized-deallocation.
2293
2294 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
2295
2296         * testsuite/experimental/memory_resource/new_delete_resource.cc: Fix
2297         test by passing correct alignment to deallocate function.
2298
2299 2019-05-18  Jonathan Wakely  <jwakely@redhat.com>
2300
2301         PR libstdc++/90520
2302         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
2303         Raise exception if unique_ptr tuple member has unknown structure.
2304         * python/libstdcxx/v6/xmethods.py (UniquePtrGetWorker.__call__):
2305         Adjust worker to support new __uniq_ptr_data base class. Do not
2306         assume field called _M_head_impl is the first tuple element.
2307
2308 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
2309
2310         * include/bits/stl_deque.h
2311         (_Deque_iterator<>::__ptr_to): Remove, use std::__ptr_rebind.
2312         (_Deque_base(_Deque_base&&, const allocator_type&)): New.
2313         (_Deque_base::_Deque_impl_data): New.
2314         (_Deque_base::_Deque_impl): Inherit latter.
2315         (_Deque_base::_Deque_impl::_M_swap_data): Move...
2316         (_Deque_base::_Deque_impl_data::_M_swap_data): ... here.
2317         (_Deque_base::_Deque_impl()): Add noexcept qualification.
2318         (_Deque_base::_Deque_impl(_Deque_impl&&, _Tp_alloc_type&&)): New.
2319         (_Deque_base::_Deque_impl::_M_get_Tp_allocator()): Remove static_cast.
2320         (deque<>::deque()): Default.
2321         (deque<>::deque(deque&&)): Default.
2322         (deque<>::deque(deque&&, const allocator_type&, false_type)): New.
2323         (deque<>::deque(deque&&, const allocator_type&, true_type)): New.
2324         (deque<>::deque(deque&&, const allocator_type&)): Delegate to latters.
2325         (deque<>::deque<_It>(_It, _It, const allocator_type&)): Use
2326         _M_range_initialize.
2327         (deque<>::assign<_It>(_It, _It)): Use _M_assign_aux.
2328         (deque<>::resize(size_type, const value_type&)): Share a single
2329         implementation.
2330         (deque<>::insert<_It>(const_iterator, _It, _It)): Use
2331         _M_range_insert_aux.
2332         [__cplusplus >= 201103L](_M_initialize_dispatch): Remove.
2333         [__cplusplus >= 201103L](_M_assign_dispatch): Remove.
2334         [__cplusplus >= 201103L](_M_insert_dispatch): Remove.
2335         * testsuite/23_containers/deque/allocator/default_init.cc: New.
2336
2337 2019-05-17  Jonathan Wakely  <jwakely@redhat.com>
2338
2339         PR libstdc++/90246
2340         * include/std/variant (holds_alternative, get, get_if): Improve
2341         static assertion messages.
2342         (bad_variant_access::bad_variant_access()): Change default message.
2343         (__throw_bad_variant_access(bool)): New overload.
2344         (get): Use new overload.
2345         (visit, visit<R>): Improve exception message.
2346
2347         * testsuite/20_util/variant/compile.cc: Fix narrowing test for ILP32
2348         targets. Add more cases from P0608R3.
2349         * testsuite/20_util/variant/run.cc: Add more cases from P0608R3.
2350
2351         * include/bits/random.h (seed_seq::param): Fix non-reserved name.
2352         * include/experimental/type_traits (is_detected_exact)
2353         (is_detected_exact_v): Likewise.
2354         * include/pstl/execution_defs.h (is_execution_policy)
2355         (is_execution_policy_v, __enable_if_execution_policy): Likewise.
2356         * include/pstl/execution_impl.h (__policy_traits): Likewise.
2357         * testsuite/17_intro/names.cc: Check for more non-reserved names.
2358         * testsuite/experimental/names.cc: New test.
2359
2360         PR libstdc++/85965
2361         * include/bits/hashtable.h (_Hashtable::~_Hashtable()): Remove static
2362         assertions from the destructor.
2363         * include/bits/hashtable_policy.h (_Hash_code_base::_M_hash_code):
2364         Move static_assert for hash function to here.
2365         (_Hash_table_base::_M_equals): Move static_assert for equality
2366         predicate to here.
2367         * include/bits/stl_tree.h (_Rb_tree::_S_value(_Const_Link_type)):
2368         Remove.
2369         (_Rb_tree::_S_key(_Const_Link_type)): Move assertions here. Access
2370         the value directly instead of calling _S_value.
2371         (_Rb_tree::_S_value(_Const_Base_ptr)): Remove.
2372         (_Rb_tree::_S_key(_Const_Base_ptr)): Do downcast and forward to
2373         _S_key(_Const_Link_type).
2374         * testsuite/23_containers/set/85965.cc: Check construction,
2375         destruction, assignment and size() do not trigger the assertions.
2376         * testsuite/23_containers/unordered_set/85965.cc: Likewise.
2377         * testsuite/23_containers/map/48101_neg.cc: Call find and adjust
2378         expected errors.
2379         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
2380         * testsuite/23_containers/multiset/48101_neg.cc: Likewise.
2381         * testsuite/23_containers/set/48101_neg.cc: Likewise.
2382         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
2383         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
2384         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
2385         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
2386
2387         * include/bits/invoke.h [__cplusplus < 201703L] (__invoke_r<void>):
2388         Use _GLIBCXX14_CONSTEXPR because void functions cannot be constexpr
2389         in C++11.
2390
2391         * doc/xml/manual/status_cxx2020.xml: Update P0608R3, P0777R1, and
2392         P1165R1 entries.
2393         * doc/html/*: Regenerate.
2394         * include/std/tuple (make_from_tuple): Use remove_reference_t instead
2395         of decay_t (P0777R1).
2396
2397 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
2398
2399         Move from state of allocators (LWG2593)
2400         * include/bits/stl_deque.h
2401         (_Deque_base(_Deque_base&&, false_type)): Remove.
2402         (_Deque_base(_Deque_base&&, true_type)): Remove.
2403         (_Deque_base(_Deque_base&&)): Adapt.
2404         (_Deque_base::_M_move_impl()): Remove.
2405         * testsuite/util/testsuite_allocator.h
2406         (propagating_allocator(propagating_allocator&&)): Preserve move from
2407         state.
2408         * testsuite/23_containers/deque/allocator/move_assign.cc (test02):
2409         Adapt.
2410         * testsuite/23_containers/forward_list/allocator/move_assign.cc (test02):
2411         Adapt.
2412         * testsuite/23_containers/list/allocator/move_assign.cc (test02): Adapt.
2413         * testsuite/23_containers/map/allocator/move_assign.cc (test02): Adapt.
2414         * testsuite/23_containers/multimap/allocator/move_assign.cc (test02):
2415         Adapt.
2416         * testsuite/23_containers/multiset/allocator/move_assign.cc (test02):
2417         Adapt.
2418         * testsuite/23_containers/set/allocator/move_assign.cc (test02): Adapt.
2419         * testsuite/23_containers/unordered_map/allocator/move_assign.cc
2420         (test02): Adapt.
2421         * testsuite/23_containers/unordered_multimap/allocator/move_assign.cc
2422         (test02): Adapt.
2423         * testsuite/23_containers/unordered_multiset/allocator/move_assign.cc
2424         (test02): Adapt.
2425         * testsuite/23_containers/unordered_set/allocator/move_assign.cc
2426         (test02): Adapt.
2427         * testsuite/23_containers/vector/allocator/move_assign.cc (test02):
2428         Adapt.
2429         * testsuite/23_containers/vector/bool/allocator/move_assign.cc (test02):
2430         Adapt.
2431         * testsuite/21_strings/basic_string/allocator/char/move_assign.cc
2432         (test02): Adapt.
2433         * testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc
2434         (test02): Adapt.
2435
2436 2019-05-16  Jonathan Wakely  <jwakely@redhat.com>
2437
2438         * src/c++17/fs_ops.cc (absolute(const path&, error_code&))
2439         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Remove bogus assertion.
2440
2441         * include/std/variant (__overload_set): Remove.
2442         (_Arr): New helper.
2443         (_Build_FUN): New class template to define a single FUN overload,
2444         with specializations to prevent unwanted conversions, as per P0608R3.
2445         (_Build_FUNs): New class template to build an overload set of FUN.
2446         (_FUN_type): New alias template to perform overload resolution.
2447         (__accepted_type): Use integer_constant base for failure case. Use
2448         _FUN_type for successful case.
2449         (variant::__accepted_index): Use _Tp instead of _Tp&&.
2450         (variant::variant(_Tp&&)): Likewise.
2451         (variant::operator=(_Tp&&)): Likewise.
2452
2453         * include/std/variant (_Variant_storage<false, _Types...>::_M_reset):
2454         Replace raw visitation with a runtime check for the valueless state
2455         and a non-raw visitor.
2456         (_Variant_storage<false, _Types...>::_M_reset_impl): Remove.
2457         (variant::index()): Remove branch.
2458         (variant::swap(variant&)): Use valueless_by_exception() instead of
2459         comparing the index to variant_npos, and add likelihood attribute.
2460
2461         * include/bits/hashtable_policy.h (_Equal_helper): Remove.
2462         (_Hashtable_base::_Equal_hash_code): Define new class template.
2463         (_Hashtable_base::_M_equals): Use _Equal_hash_code instead of
2464         _Equal_helper.
2465
2466         * include/bits/hashtable_policy.h (_Hashtable_ebo_helper::_S_get):
2467         Replace with _M_get non-static member function.
2468         (_Hashtable_ebo_helper::_S_cget): Replace with _M_cget non-static
2469         member function.
2470         (_Hash_code_base, _Local_iterator_base, _Hashtable_base):
2471         (_Hashtable_alloc): Adjust to use non-static members of EBO helper.
2472
2473         * include/bits/hashtable_policy.h (_Hash_code_base::_M_swap): Use
2474         _S_get accessors for members in EBO helpers.
2475         (_Hash_code_base::_M_extract(), _Hash_code_base::_M_ranged_hash())
2476         (_Hash_code_base::_M_h1(), _Hash_code_base::_M_h2()): Remove non-const
2477         overloads.
2478         (_Hashtable_base::_M_swap): Use _S_get accessors for members in EBO
2479         helpers.
2480         (_Hashtable_base::_M_eq()): Remove non-const overload.
2481
2482 2019-05-15  Jonathan Wakely  <jwakely@redhat.com>
2483
2484         * include/std/variant (visit, visit<R>): Qualify calls to __do_visit.
2485
2486 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
2487
2488         * testsuite/util/testsuite_allocator.h (NullablePointer::operator bool):
2489         Fix return value.
2490
2491 2019-05-14  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
2492
2493         * config/os/solaris/solaris2.10: Move to ...
2494         * config/os/solaris: ... this.
2495         * configure.host (os_include_dir): Adapt.
2496         (abi_baseline_pair): Remove Solaris 10 handling.
2497         * config/abi/post/i386-solaris2.10: Remove.
2498         * config/abi/post/sparc-solaris2.10: Remove.
2499         * config/abi/post/i386-solaris2.11: Rename to ...
2500         * config/abi/post/i386-solaris: ... this.
2501         * config/abi/post/sparc-solaris2.11: Rename to ...
2502         * config/abi/post/sparc-solaris: ... this.
2503
2504         * libsupc++/new_opa.cc [_GLIBCXX_HAVE_MEMALIGN] [__sun]: Remove
2505         workaround.
2506
2507         * testsuite/ext/enc_filebuf/char/13598.cc: Remove *-*-solaris2.10
2508         xfail.
2509
2510 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
2511
2512         * include/std/variant (__visit_with_index): Remove typedef.
2513         (__deduce_visit_result): New tag type.
2514         (__raw_visit, __raw_idx_visit): New helper functions for "raw"
2515         visitation of possibly-valueless variants, forwarding to __do_visit
2516         with the relevant tag type.
2517         (_Variant_storage<false, _Types...>::_M_reset_impl): Use __raw_visit
2518         and make lambda return void.
2519         (__variant_construct): Likewise.
2520         (_Copy_assign_base::operator=, _Move_assign_base::operator=): Use
2521         __raw_idx_visit and make lambda return void.
2522         (_Multi_array::__untag_result): Add metafunction to check the function
2523         pointer type for a tag type that dictates the kind of visitation.
2524         (_Multi_array<_Ret(*)(_Visitor, _Variants...), __first, __rest...>):
2525         Use decltype(auto) instead of tagged function pointer type.
2526         (__gen_vtable_impl): Remove bool non-type parameter and unused
2527         _Variant_tuple parameter.
2528         (__gen_vtable_impl::__visit_invoke_impl): Remove.
2529         (__gen_vtable_impl::__do_visit_invoke): Remove.
2530         (__gen_vtable_impl::__do_visit_invoke_r): Remove.
2531         (__gen_vtable_impl::__visit_invoke): Use if-constexpr and __invoke_r
2532         for the visit<R> case, rather than dispatching to separate functions.
2533         (_VARIANT_RELATION_FUNCTION_TEMPLATE): Use __raw_idx_visit and make
2534         lambda return void.
2535         (variant::swap): Likewise.
2536         (__do_visit): Replace two non-type template parameters with a single
2537         type parameter, so that the caller must specify the visitor's return
2538         type (or one of the tag types).
2539         (visit): Deduce a return type from the visitor and use the
2540         __deduce_visit_result tag to enforce that all overloads return the
2541         same type.
2542         (visit<R>): Call __do_visit<R> with explicit result type.
2543         (__variant_hash_call_base_impl::operator()): Use __raw_visit and make
2544         lambda return void.
2545
2546 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2547
2548         nonesuch is insufficiently useless (lwg2996)
2549         * include/std/type_traits (struct __nonesuch): Added private base
2550         class to make __nonesuch not an aggregate and removed deleted default
2551         constructor.
2552         * include/bits/stl_pair.h (struct __nonesuch_no_braces): Removed.
2553         (operator=(const pair&)): Use __nonesuch instead of
2554         __nonesuch_no_braces.
2555         (operator=(pair&&)): Likewise
2556         * include/std/tuple (operator=(const tuple&)): Use __nonesuch instead
2557         of __nonesuch_no_braces.
2558         (operator=(tuple&&)): Likewise
2559         * include/experimental/type_traits (struct nonesuch): Added private
2560         base class to make nonesuch not an aggregate and removed deleted
2561         default constructor.
2562         * testsuite/20_util/nonesuch/nonesuch.cc: New.
2563         * testsuite/experimental/type_traits/nonesuch.cc: New.
2564
2565 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
2566
2567         * include/bits/std_function.h (_Simple_type_wrapper): Remove.
2568         (_Function_handler): Remove partial specializations for void return
2569         types and pointers to member.
2570         (_Function_handler::_M_manager): Adapt to removal of
2571         _Simple_type_wrapper.
2572         (_Function_handler::_M_invoke): Use __invoke_r instead of __invoke.
2573         * include/std/functional (_Bind_result::__enable_if_void)
2574         (_Bind_result::__disable_if_void): Remove sfinae helpers.
2575         (_Bind_result::__call): Use __invoke_r and remove overloads for void
2576         return types.
2577         * include/std/future (__future_base::_Task_state::_M_run)
2578         (__future_base::_Task_state::_M_run_delayed): Use __invoke_r and
2579         change return type of lambda expressions.
2580
2581         * include/bits/invoke.h (__invoke_r): Define new function implementing
2582         the INVOKE<R> pseudo-function.
2583         * testsuite/20_util/function_objects/invoke/1.cc: Add more tests.
2584         * testsuite/20_util/function_objects/invoke/2.cc: New test.
2585
2586         * include/std/type_traits (__is_nt_convertible_helper): Define it
2587         unconditionally, not only for C++20.
2588         (__is_nothrow_convertible): Define internal trait for use in C++11.
2589         (__is_nt_invocable_impl: Fix by using __is_nothrow_convertible.
2590         (is_invocable_r_v, is_nothrow_invocable_r_v): Add missing parameter.
2591         * testsuite/20_util/is_nothrow_convertible/value_ext.cc: New test.
2592         * testsuite/20_util/is_nothrow_convertible/value.cc: Check with type
2593         that has nothrow explicit conversion but potentially-throwing implicit
2594         conversion.
2595         * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise.
2596         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix helper
2597         function to only consider implicit conversions.
2598         * testsuite/20_util/tuple/cons/noexcept_specs.cc: Add comment.
2599
2600         * include/std/iterator: Include <iosfwd> instead of <istream> and
2601         <ostream>.
2602
2603         * include/bits/stl_tree.h (_Rb_tree::erase(const Key*, const Key*)):
2604         Remove unused, non-standard function.
2605
2606         * include/bits/regex.h (match_results::max_size()): Adjust return
2607         value to account for prefix/suffix/unmatched subs.
2608         (match_results::_M_resize(unsigned int)): Use _Base_type::assign to
2609         reset the contained sub matches.
2610         (match_results::_M_establish_failed_match(_Bi_iter)): Add new member
2611         function to set result state following a failed match.
2612         * include/bits/regex.tcc (__regex_algo_impl): Remove loop to set
2613         sub_match states after _M_resize. Use _M_establish_failed_match.
2614
2615         PR libstdc++/69724
2616         * include/std/thread (thread::_State_impl, thread::_S_make_state):
2617         Replace single _Callable parameter with variadic _Args pack, to
2618         forward them directly to the tuple of decayed copies.
2619         * testsuite/30_threads/thread/cons/69724.cc: New test.
2620
2621 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2622
2623         Inconsistency wrt Allocators in basic_string assignment (LWG2579)
2624         * include/bits/basic_string.h: (operator=(const basic_string&):
2625         Move allocator decision to assign.
2626         (assign(const basic_string&)): Move allocator decision here.
2627         * testsuite/21_strings/basic_string/allocator/char/copy_assign.cc:
2628         Add tests.
2629         * testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc:
2630         Add tests.
2631
2632 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
2633
2634         * testsuite/util/testsuite_allocator.h (memory_resource)
2635         (default_resource_mgr): Fix indentation.
2636
2637         * testsuite/20_util/allocator_traits/members/allocate_hint_nonpod.cc:
2638         Use operator-> to access raw pointer member.
2639         * testsuite/23_containers/vector/59829.cc: Likewise.
2640         * testsuite/23_containers/vector/bool/80893.cc: Likewise.
2641         * testsuite/libstdc++-prettyprinters/cxx11.cc: Use NullablePointer.
2642         * testsuite/util/testsuite_allocator.h (NullablePointer): New utility
2643         for tests.
2644         (PointerBase, PointerBase_void): Derive from NullablePointer and use
2645         its constructors and equality operators. Change converting
2646         constructors to use operator-> to access private member of the other
2647         pointer type.
2648         (PointerBase_void::operator->()): Add, for access to private member.
2649         (operator-(PointerBase, PointerBase)): Change to hidden friend.
2650         (operator==(PointerBase, PointerBase)): Remove.
2651         (operator!=(PointerBase, PointerBase)): Remove.
2652
2653         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__): Do
2654         not assume field called _M_head_impl is the first tuple element.
2655         * testsuite/libstdc++-prettyprinters/compat.cc: Make tuple
2656         implementation more accurate.
2657         * testsuite/libstdc++-prettyprinters/cxx11.cc: Check unique_ptr with
2658         empty pointer type and non-empty deleter.
2659
2660         LWG 2899 - Make is_move_constructible correct for unique_ptr
2661         * include/bits/unique_ptr.h (__uniq_ptr_impl): Add move constructor,
2662         move assignment operator.
2663         (__uniq_ptr_impl::release(), __uniq_ptr_impl::reset(pointer)): Add.
2664         (__uniq_ptr_data): New class template with conditionally deleted
2665         special members.
2666         (unique_ptr, unique_ptr<T[], D>): Change type of data member from
2667         __uniq_ptr_impl<T, D> to __uniq_ptr_data<T, D>. Define move
2668         constructor and move assignment operator as defaulted.
2669         (unique_ptr::release(), unique_ptr<T[], D>::release()): Forward to
2670         __uniq_ptr_impl::release().
2671         (unique_ptr::reset(pointer), unique_ptr<T[], D>::reset<U>(U)): Forward
2672         to __uniq_ptr_impl::reset(pointer).
2673         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
2674         Check for new __uniq_ptr_data type.
2675         * testsuite/20_util/unique_ptr/dr2899.cc: New test.
2676
2677 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
2678
2679         PR libstdc++/90454.cc path construction from void*
2680         * include/bits/fs_path.h (path::_Path): Use remove_pointer so that
2681         pointers to void are rejected as well as void.
2682         * include/experimental/bits/fs_path.h (path::_Path): Likewise.
2683         * testsuite/27_io/filesystem/path/construct/80762.cc: Also check
2684         pointers to void.
2685         * testsuite/experimental/filesystem/path/construct/80762.cc: Likewise.
2686
2687         * doc/xml/manual/policy_data_structures.xml: Comment out stray
2688         <remark> elements. Fix formatting of bibliography references.
2689
2690 2019-05-13  Edward Smith-Rowland  <3dw4rd@verizon.net>
2691
2692         * doc/xml/manual/status_cxx2020.xml: Document P0811R3 status.
2693
2694 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
2695
2696         Remove Profile Mode, deprecated since 7.1.0
2697         * doc/Makefile.am: Remove XML file for profile mode docs.
2698         * doc/Makefile.in: Regenerate.
2699         * doc/xml/authors.xml: Remove authors of profile mode docs.
2700         * doc/xml/manual/appendix_contributing.xml: Remove mention of profile
2701         mode.
2702         * doc/xml/manual/debug.xml: Likewise.
2703         * doc/xml/manual/evolution.xml: Document removal of profile mode.
2704         * doc/xml/manual/profile_mode.xml: Remove profile mode docs.
2705         * doc/xml/manual/spine.xml: Remove profile mode author credit.
2706         * doc/xml/manual/test.xml: Remove docs for dg-require-profile-mode
2707         directive.
2708         * doc/xml/manual/using.xml: Remove docs for profile mode headers and
2709         macro.
2710         * doc/html/*: Regenerate.
2711         * include/Makefile.am: Remove profile mode headers.
2712         * include/Makefile.in: Regenerate.
2713         * include/bits/c++config (std::__profile): Remove namespace.
2714         [_GLIBCXX_PROFILE]: Remove checks for macro.
2715         * include/profile/array: Remove.
2716         * include/profile/base.h: Remove.
2717         * include/profile/bitset: Remove.
2718         * include/profile/deque: Remove.
2719         * include/profile/forward_list: Remove.
2720         * include/profile/impl/profiler.h: Remove.
2721         * include/profile/impl/profiler_algos.h: Remove.
2722         * include/profile/impl/profiler_container_size.h: Remove.
2723         * include/profile/impl/profiler_hash_func.h: Remove.
2724         * include/profile/impl/profiler_hashtable_size.h: Remove.
2725         * include/profile/impl/profiler_list_to_slist.h: Remove.
2726         * include/profile/impl/profiler_list_to_vector.h: Remove.
2727         * include/profile/impl/profiler_map_to_unordered_map.h: Remove.
2728         * include/profile/impl/profiler_node.h: Remove.
2729         * include/profile/impl/profiler_state.h: Remove.
2730         * include/profile/impl/profiler_trace.h: Remove.
2731         * include/profile/impl/profiler_vector_size.h: Remove.
2732         * include/profile/impl/profiler_vector_to_list.h: Remove.
2733         * include/profile/iterator_tracker.h: Remove.
2734         * include/profile/list: Remove.
2735         * include/profile/map: Remove.
2736         * include/profile/map.h: Remove.
2737         * include/profile/multimap.h: Remove.
2738         * include/profile/multiset.h: Remove.
2739         * include/profile/ordered_base.h: Remove.
2740         * include/profile/set: Remove.
2741         * include/profile/set.h: Remove.
2742         * include/profile/unordered_base.h: Remove.
2743         * include/profile/unordered_map: Remove.
2744         * include/profile/unordered_set: Remove.
2745         * include/profile/vector: Remove.
2746         * scripts/run_doxygen: Do not process profile mode headers.
2747         * testsuite/23_containers/array/element_access/60497.cc: Don't use
2748         profile mode type.
2749         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
2750         Remove dg-skip-if for profile mode.
2751         * testsuite/23_containers/forward_list/capacity/1.cc: Remove
2752         preprocessor check for profile mode.
2753         * testsuite/23_containers/list/capacity/29134.cc: Likewise.
2754         * testsuite/23_containers/map/modifiers/extract.cc: Remove dg-skip-if
2755         for profile mode.
2756         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
2757         Likewise.
2758         * testsuite/23_containers/map/modifiers/try_emplace/1.cc: Likewise.
2759         * testsuite/23_containers/multimap/modifiers/extract.cc: Likewise.
2760         * testsuite/23_containers/multiset/modifiers/extract.cc: Likewise.
2761         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
2762         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
2763         Likewise.
2764         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
2765         Likewise.
2766         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
2767         Likewise.
2768         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
2769         Likewise.
2770         * testsuite/23_containers/vector/bool/capacity/29134.cc: Remove
2771         preprocessor check for profile mode.
2772         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
2773         Likewise.
2774         * testsuite/23_containers/vector/modifiers/insert_vs_emplace.cc:
2775         Remove dg-skip-if for profile mode.
2776         * testsuite/25_algorithms/binary_search/partitioned.cc: Likewise.
2777         * testsuite/25_algorithms/equal_range/partitioned.cc: Likewise.
2778         * testsuite/25_algorithms/lexicographical_compare/71545.cc: Likewise.
2779         * testsuite/25_algorithms/lower_bound/partitioned.cc: Likewise.
2780         * testsuite/25_algorithms/upper_bound/partitioned.cc: Likewise.
2781         * testsuite/Makefile.am: Remove profile_flags variable and
2782         * testsuite/Makefile.am: Remove profile_flags variable and
2783         check-profile target.
2784         * testsuite/Makefile.in: Regenerate.
2785         * testsuite/ext/profile/all.cc: Remove.
2786         * testsuite/ext/profile/mutex_extensions_neg.cc: Remove.
2787         * testsuite/ext/profile/profiler_algos.cc: Remove.
2788         * testsuite/ext/profile/replace_new.cc: Remove.
2789         * testsuite/ext/throw_allocator/deallocate_global.cc: Remove
2790         preprocessor check for profile mode.
2791         * testsuite/ext/throw_allocator/deallocate_local.cc: Likewise.
2792         * testsuite/lib/libstdc++.exp (check_v3_target_profile_mode): Remove.
2793         (check_v3_target_normal_mode): Do not check for profile mode macro.
2794         * testsuite/libstdc++-prettyprinters/80276.cc: Remove dg-skip-if for
2795         profile mode.
2796         * testsuite/libstdc++-prettyprinters/compat.cc: Likewise.
2797         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
2798         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
2799         * testsuite/libstdc++-prettyprinters/debug.cc: Likewise.
2800         * testsuite/libstdc++-prettyprinters/debug_cxx11.cc: Likewise.
2801         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
2802         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
2803         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
2804         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
2805         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
2806
2807         Remove array_allocator extension, deprecated since 4.9.0
2808         * doc/xml/manual/allocator.xml: Remove documentation for
2809         array_allocator.
2810         * doc/xml/manual/evolution.xml: Document array_allocator removal.
2811         * doc/xml/manual/using.xml: Remove header from documentation.
2812         * include/Makefile.am: Remove <ext/array_allocator.h> header.
2813         * include/Makefile.in: Regenerate.
2814         * include/ext/array_allocator.h: Remove.
2815         * include/precompiled/extc++.h: Do not include removed header.
2816         * testsuite/ext/array_allocator/1.cc: Remove.
2817         * testsuite/ext/array_allocator/2.cc: Remove.
2818         * testsuite/ext/array_allocator/26875.cc: Remove.
2819         * testsuite/ext/array_allocator/3.cc: Remove.
2820         * testsuite/ext/array_allocator/check_deallocate_null.cc: Remove.
2821         * testsuite/ext/array_allocator/check_delete.cc: Remove.
2822         * testsuite/ext/array_allocator/check_new.cc: Remove.
2823         * testsuite/ext/array_allocator/variadic_construct.cc: Remove.
2824         * testsuite/ext/headers.cc: Do not include removed header.
2825
2826 2019-05-11  François Dumont  <fdumont@gcc.gnu.org>
2827
2828         * include/bits/stl_bvector.h
2829         (operator==(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2830         Make hidden friend.
2831         (operator<(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2832         Likewise.
2833         (operator!=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2834         Likewise.
2835         (operator>(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2836         Likewise.
2837         (operator<=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2838         Likewise.
2839         (operator>=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2840         Likewise.
2841         (operator-(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2842         Likewise.
2843         (_Bit_iterator::operator+(difference_type)): Likewise and allow NRVO
2844         copy elision.
2845         (_Bit_iterator::operator-(difference_type)): Likewise.
2846         (operator+(ptrdiff_t, const _Bit_iterator&)): Make hidden friend.
2847         (_Bit_const_iterator::operator+(difference_type)): Likewise and allow
2848         NRVO copy elision.
2849         (_Bit_const_iterator::operator-(difference_type)): Likewise.
2850         (operator+(ptrdiff_t, const _Bit_const_iterator&)): Make hidden friend.
2851
2852 2019-05-10  Jonathan Wakely  <jwakely@redhat.com>
2853
2854         PR libstdc++/81266
2855         * testsuite/util/thread/all.h: Do not use remove_pointer for
2856         std::thread::native_handle_type.
2857
2858         PR libstdc++/90397
2859         * include/std/variant (_Variant_storage<false, Types...>::_M_storage())
2860         (_Variant_storage<true, Types...>::_M_reset()))
2861         (_Variant_storage<true, Types...>::_M_storage())): Add noexcept.
2862         (__get_storage): Likewise.
2863         (variant): Add noexcept to friend declarations for __get and
2864         __get_storage.
2865
2866         PR libstdc++/90388
2867         * include/bits/unique_ptr.h (default_delete, default_delete<T[]>):
2868         Use _Require for constraints.
2869         (operator>(nullptr_t, const unique_ptr<T,D>&)): Implement exactly as
2870         per the standard.
2871         (__uniq_ptr_hash): New base class with conditionally-disabled call
2872         operator.
2873         (hash<unique_ptr<T,D>>): Derive from __uniq_ptr_hash.
2874         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
2875         * testsuite/20_util/unique_ptr/hash/90388.cc: New test.
2876
2877         * include/bits/shared_ptr.h: Improve docs.
2878         * include/bits/shared_ptr_base.h: Likewise.
2879         * include/bits/stl_uninitialized.h: Likewise.
2880         * include/bits/unique_ptr.h: Likewise.
2881         * libsupc++/new: Likewise.
2882
2883 2019-05-09  François Dumont  <fdumont@gcc.gnu.org>
2884
2885         * include/bits/stl_deque.h
2886         (operator==(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2887         Make hidden friend.
2888         (operator!=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2889         Likewise.
2890         (operator<(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2891         Likewise.
2892         (operator<=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2893         Likewise.
2894         (operator>(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2895         Likewise.
2896         (operator>=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2897         Likewise.
2898         (_Deque_iterator<>::operator+(difference_type)): Likewise and allow NRVO
2899         copy elision.
2900         (_Deque_iterator<>::operator-(difference_type)): Likewise.
2901
2902 2019-05-08  François Dumont  <fdumont@gcc.gnu.org>
2903
2904         PR libstdc++/90277
2905         * testsuite/23_containers/unordered_multiset/insert/24061-multiset.cc
2906         (test01): Reserve for number of insertions to avoid rehash during test.
2907         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
2908         (test01): Likewise.
2909         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
2910         (test01): Likewise.
2911         (test02): Likewise.
2912         (test03): Likewise.
2913
2914 2019-05-08  Jonathan Wakely  <jwakely@redhat.com>
2915
2916         * include/experimental/bits/fs_path.h: Improve docs.
2917         * include/experimental/bits/net.h: Fix wrong header name in comment.
2918         Do not document implementation details.
2919         * include/experimental/netfwd: Fix doxygen grouping.
2920
2921 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
2922
2923         * include/bits/stl_pair.h: Improve docs.
2924         * include/std/tuple: Likewise.
2925
2926         * doc/doxygen/doxygroups.cc (std::literals): Add documentation for
2927         inline namespace.
2928         * include/std/chrono: Improve docs.
2929         * include/std/ratio: Do not document implementation details.
2930         * testsuite/20_util/ratio/cons/cons_overflow_neg.cc: Adjust dg-error
2931         line numbers.
2932         * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Likewise.
2933
2934         PR libstdc++/89102
2935         * doc/xml/manual/intro.xml: Document DR 2408 and 2465 changes.
2936         * include/std/chrono (__duration_common_type_wrapper): Replace with ...
2937         (__duration_common_type): New helper.
2938         (common_type<chrono::duration<R1, P2>, chrono::duration<R2, P2>>): Use
2939         __duration_common_type.
2940         (__timepoint_common_type_wrapper): Replace with ...
2941         (__timepoint_common_type): New helper.
2942         (common_type<chrono::time_point<C, D2>, chrono::time_point<C, D2>>):
2943         Use __time_point_common_type.
2944         * include/std/type_traits (common_type<>): Define, as per LWG 2408.
2945         (__common_type_impl): If either argument is transformed by decay,
2946         use the common_type of the decayed types.
2947         (__common_type_impl<_Tp, _Up, _Tp, _Up>): If the types are already
2948         decayed, use __do_common_type_impl to get the common_type.
2949         (common_type<_Tp>): Use common_type<_Tp, _Tp>.
2950         (__do_member_type_wrapper, __member_type_wrapper)
2951         (__expanded_common_type_wrapper): Remove.
2952         (__common_type_pack, __common_type_fold): New helpers.
2953         (common_type<_Tp, _Up, _Vp...>): Use new helpers instead of
2954         __member_type_wrapper and __expanded_common_type_wrapper.
2955         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
2956         Test zero-length template argument list.
2957         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
2958         Test single argument cases and argument types that should decay.
2959         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
2960         Adjust expected error.
2961         * testsuite/20_util/duration/literals/range_neg.cc: Use zero for
2962         dg-error lineno.
2963         * testsuite/20_util/duration/requirements/typedefs_neg1.cc: Likewise.
2964         * testsuite/20_util/duration/requirements/typedefs_neg2.cc: Likewise.
2965         * testsuite/20_util/duration/requirements/typedefs_neg3.cc: Likewise.
2966
2967         * doc/xml/manual/intro.xml: Fix DR 2537 and DR 2566 confusion.
2968
2969 2019-05-01  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2970
2971         Make allocator propagation more consistent for
2972         operator+(basic_string) (P1165R1)
2973         * include/bits/basic_string.h
2974         (operator+(basic_string&&, basic_string&&): Changed resulting
2975         allocator to always be the one from the first parameter.
2976         * include/bits/basic_string.tcc
2977         (operator+(const _CharT*, const basic_string&)): Changed
2978         resulting allocator to be SOCCC on the second parameter's allocator.
2979         (operator+(_CharT, const basic_string&)): Likewise.
2980         * testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
2981         New.
2982         * testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
2983         New.
2984
2985 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
2986
2987         * include/bits/regex.h: Improve docs.
2988         * include/bits/regex.tcc: Do not document implementation details.
2989
2990         * testsuite/19_diagnostics/error_code/hash.cc: New test.
2991
2992 2019-05-06  François Dumont  <fdumont@gcc.gnu.org>
2993
2994         * python/libstdcxx/v6/printers.py (add_one_template_type_printer):
2995         Add type printer for container types in std::__debug namespace.
2996         * testsuite/lib/gdb-test.exp (whatis-regexp-test): New.
2997         (gdb-tests): Use distinct parameters for the type of test and use of
2998         regex.
2999         (gdb-test): Check for regex test even if 'whatis' test.
3000         * testsuite/libstdc++-prettyprinters/80276.cc: Adapt for _GLIBCXX_DEBUG
3001         mode.
3002         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
3003         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
3004         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
3005         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
3006         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
3007         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
3008         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
3009
3010 2019-05-04  Jonathan Wakely  <jwakely@redhat.com>
3011
3012         * include/std/system_error (error_category): Fix comment.
3013
3014         PR libstdc++/90299
3015         * src/c++17/fs_ops.cc (absolute(const path&)): Report an error if the
3016         argument is an empty path.
3017         (absolute(const path&, error_code&)): Use invalid_argument as error
3018         code instead of no_such_file_or_directory.
3019         * testsuite/27_io/filesystem/operations/absolute.cc: Check handling
3020         of non-existent paths and empty paths with both overloads of absolute.
3021
3022         * include/std/system_error (error_category, error_code)
3023         (error_condition): Improve docs.
3024         * libsupc++/exception: Add missing @addtogroup Doxygen command.
3025         * libsupc++/exception_ptr.h (exception_ptr): Link equality operators
3026         to class documentation. Suppress documentation for implementation
3027         details.
3028         * libsupc++/nested_exception.h (throw_with_nested, rethrow_if_nested):
3029         Suppress documentation for implementation details.
3030
3031         * include/std/system_error (error_code): Remove friend declaration
3032         for hash<error_code>.
3033         (hash<error_code>::operator()): Use public member functions to access
3034         value and category.
3035         (hash<error_condition>::operator()): Use address of category, not
3036         its object representation.
3037         * src/c++11/compatibility-c++0x.cc (hash<error_code>::operator()):
3038         Use public member functions to access value and category.
3039         * testsuite/19_diagnostics/error_condition/hash.cc: New test.
3040
3041 2019-05-04  François Dumont  <fdumont@gcc.gnu.org>
3042
3043         * include/bits/hashtable.h (_Hashtable<>::rehash): Review comment.
3044         * include/bits/hashtable_policy.h
3045         (_Prime_rehash_policy::_M_bkt_for_elements): Use __builtin_ceill.
3046         (_Power2_rehash_policy::_M_bkt_for_elements): Likewise.
3047         (_Power2_rehash_policy::_M_next_bkt): Enforce returning a result not
3048         smaller than input value rather than always greater. Preserve
3049         _M_next_resize if called with 0 input. Use __builtin_floorl.
3050         (_Power2_rehash_policy::_M_need_rehash): Rehash only if number of
3051         elements + number of insertions is greater than _M_next_resize. Start
3052         with 11 buckets if not told otherwise. Use __builtin_floorl.
3053         (_Rehash_base<>::reserve): Use rehash policy _M_bkt_for_elements.
3054         * src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy::_M_next_bkt):
3055         Preserve _M_next_resize if called with 0 input. Use __builtin_floorl.
3056         (_Prime_rehash_policy::_M_need_rehash): Start with 11 buckets if not
3057         told otherwise. Use __builtin_floorl.
3058         * testsuite/23_containers/unordered_set/hash_policy/71181.cc: Adapt test
3059         to also validate _Power2_rehash_policy.
3060         * testsuite/23_containers/unordered_set/hash_policy/power2_rehash.cc:
3061         Adapt.
3062
3063 2019-05-03  Jonathan Wakely  <jwakely@redhat.com>
3064
3065         PR libstdc++/61761
3066         * testsuite/26_numerics/complex/proj.cc: Don't assume <cmath> defines
3067         std::copysign.
3068
3069         PR libstdc++/52119
3070         * include/ext/numeric_traits.h (__glibcxx_min): Avoid integer
3071         overflow warning with -Wpedantic -Wsystem-headers.
3072
3073 2019-05-02  Jonathan Wakely  <jwakely@redhat.com>
3074
3075         PR libstdc++/90314
3076         * include/bits/c++config (_GLIBCXX_NOEXCEPT_IF): Use variadic macro.
3077         * include/bits/move.h (swap): Remove extra parentheses.
3078
3079         * include/experimental/bits/lfts_config.h: Improve doc markup.
3080         * include/experimental/optional: Improve docs.
3081         (_Has_addressof_mem, _Has_addressof_free, _Has_addressof)
3082         (__constexpr_addressof): Remove.
3083         (optional::operator->()): Use std::__addressof().
3084         * include/std/optional (optional::operator->()): Adjust whitespace.
3085         * testsuite/experimental/optional/constexpr/observers/2.cc: Check
3086         that operator-> is still constexpr with overloaded operator&. Change
3087         to compile-only test.
3088         * testsuite/experimental/optional/constexpr/observers/3.cc: Change to
3089         compile-only test.
3090
3091         * include/bits/shared_ptr.h: Improve docs.
3092         * include/bits/shared_ptr_atomic.h: Likewise.
3093         * include/bits/unique_ptr.h: Likewise. Adjust whitespace.
3094
3095         * include/bits/basic_string.h: Fix iterator/index confusion in
3096         Doxygen comments.
3097         * include/bits/range_access.h: Fix Doxygen warnings.
3098         * include/bits/refwrap.h: Do not document implementation details.
3099         (ref, cref): Group docs with reference_wrapper.
3100         * include/std/fstream: Fix Doxygen markup.
3101         * libsupc++/initializer_list (begin, end): Group docs with
3102         initializer_list.
3103
3104         * doc/doxygen/user.cfg.in: Set MARKDOWN_SUPPORT=YES.
3105
3106         * include/bits/unique_lock.h: Fix/improve doxygen markup.
3107         * include/std/mutex: Likewise.
3108         * include/std/shared_mutex: Likewise.
3109
3110         * include/bits/fs_dir.h: Fix/improve doxygen markup.
3111         * include/bits/fs_fwd.h: Likewise.
3112         * include/bits/fs_ops.h: Likewise.
3113         * include/bits/fs_path.h: Likewise.
3114         * include/std/filesystem: Likewise.
3115
3116         * include/experimental/bits/net.h: Fix/improve doxygen markup.
3117         * include/experimental/buffer: Likewise.
3118         * include/experimental/executor: Likewise.
3119         * include/experimental/internet: Likewise.
3120         * include/experimental/io_context: Likewise.
3121         * include/experimental/net: Likewise.
3122         * include/experimental/netfwd: Likewise.
3123         * include/experimental/socket: Likewise.
3124         * include/experimental/timer: Likewise.
3125
3126         * doc/doxygen/doxygroups.cc: Move description of experimental group
3127         here.
3128         * include/experimental/algorithm: Add to libfund-ts doc group.
3129         * include/experimental/any: Likewise. Do not document implementation
3130         details.
3131         * include/experimental/array: Add to libfund-ts doc group.
3132         * include/experimental/bits/lfts_config.h: Define libfund-ts doc group
3133         for Library Fundamentals.
3134         * include/experimental/chrono: Add to libfund-ts doc group.
3135         * include/experimental/deque: Likewise.
3136         * include/experimental/forward_list: Likewise.
3137         * include/experimental/functional: Likewise.
3138         * include/experimental/iterator: Likewise.
3139         * include/experimental/list: Likewise.
3140         * include/experimental/map: Likewise.
3141         * include/experimental/memory: Likewise.
3142         * include/experimental/memory_resource: Likewise. Improve docs.
3143         details.
3144         * include/experimental/numeric: Add to libfund-ts doc group.
3145         * include/experimental/optional: Likewise.
3146         * include/experimental/propagate_const: Likewise.
3147         * include/experimental/random: Likewise.
3148         * include/experimental/ratio: Likewise.
3149         * include/experimental/regex: Likewise.
3150         * include/experimental/set: Likewise.
3151         * include/experimental/source_location: Likewise.
3152         * include/experimental/string: Likewise.
3153         * include/experimental/string_view: Likewise.
3154         * include/experimental/system_error: Likewise.
3155         * include/experimental/tuple: Likewise.
3156         * include/experimental/type_traits: Likewise.
3157         * include/experimental/unordered_map: Likewise.
3158         * include/experimental/unordered_set: Likewise.
3159         * include/experimental/utility: Likewise.
3160         * include/experimental/vector: Likewise.
3161         * testsuite/experimental/any/misc/any_cast_neg.cc: Adjust dg-error.
3162         * testsuite/experimental/array/neg.cc: Adjust dg-error.
3163         * testsuite/experimental/propagate_const/assignment/move_neg.cc:
3164         Likewise.
3165         * testsuite/experimental/propagate_const/cons/move_neg.cc: Likewise.
3166         * testsuite/experimental/propagate_const/requirements2.cc: Likewise.
3167         * testsuite/experimental/propagate_const/requirements3.cc: Likewise.
3168         * testsuite/experimental/propagate_const/requirements4.cc: Likewise.
3169         * testsuite/experimental/propagate_const/requirements5.cc: Likewise.
3170
3171         * include/experimental/bits/fs_dir.h: Fix Doxygen markup.
3172         * include/experimental/bits/fs_fwd.h: Improve docs.
3173         * include/experimental/bits/fs_ops.h: fix Doxygen markup.
3174         * include/experimental/bits/fs_path.h: Likewise.
3175         (path, filesystem_error, u8path): Improve docs.
3176         * include/experimental/filesystem: Link to docs for TS.
3177
3178         * config/allocator/new_allocator_base.h (__allocator_base): Add
3179         workaround for Doxygen bug #6945.
3180         * include/std/memory: Improve docs. Define group for pointer safety.
3181         * include/std/scoped_allocator: Improve docs. Use "undocumented"
3182         conditional to suppress documentation for implementation details.
3183
3184         * include/bits/specfun.h: Improve docs.
3185         * include/tr1/cmath: Likewise. Fix nesting of preprocessor conditions
3186         and namespaces.
3187
3188         * doc/doxygen/doxygroups.cc (std::tr2, std::__gnu_cxx): Improve docs.
3189         (std::experimental): Add docs.
3190         * doc/doxygen/user.cfg.in (PREDEFINED): Expand macros for __cxx11
3191         namespace to nothing when generating docs.
3192         * include/bits/regex_constants.h (std::regex_constants): Improve docs.
3193         * include/std/chrono (std::chrono): Likewise.
3194         * include/std/functional (std::placeholders): Likewise.
3195         * include/std/thread (std::this_thread): Likewise.
3196
3197         * include/parallel/settings.h: Fix Doxygen markup.
3198
3199         * include/ext/pb_ds/detail/bin_search_tree_/*_imps.hpp: Do not define
3200         anything unless PB_DS_CLASS_C_DEC is defined.
3201         * include/ext/pb_ds/detail/binary_heap_/*_imps.hpp: Likewise.
3202         * include/ext/pb_ds/detail/binomial_heap_/*_imps.hpp: Likewise.
3203         * include/ext/pb_ds/detail/binomial_heap_base_/*_imps.hpp: Likewise.
3204         * include/ext/pb_ds/detail/cc_hash_table_map_/*_imps.hpp: Likewise.
3205         * include/ext/pb_ds/detail/gp_hash_table_map_/*_imps.hpp: Likewise.
3206         * include/ext/pb_ds/detail/hash_fn/*_imp.hpp: Likewise.
3207         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/*_imps.hpp:
3208         Likewise.
3209         * include/ext/pb_ds/detail/list_update_map_/*_imps.hpp: Likewise.
3210         * include/ext/pb_ds/detail/ov_tree_map_/*_imps.hpp: Likewise.
3211         * include/ext/pb_ds/detail/pairing_heap_/*_imps.hpp: Likewise.
3212         * include/ext/pb_ds/detail/pat_trie_/*_imps.hpp: Likewise.
3213         * include/ext/pb_ds/detail/rb_tree_map_/*_imps.hpp: Likewise.
3214         * include/ext/pb_ds/detail/rc_binomial_heap_/*_imps.hpp: Likewise.
3215         * include/ext/pb_ds/detail/resize_policy*_imp.hpp: Likewise.
3216         * include/ext/pb_ds/detail/splay_tree_/*_imps.hpp: Likewise.
3217         * include/ext/pb_ds/detail/thin_heap_/*_imps.hpp: Likewise.
3218         * include/ext/pb_ds/detail/trie_policy*_imp.hpp: Likewise.
3219         * include/ext/pb_ds/detail/unordered_iterator/const_iterator.hpp:
3220         Likewise.
3221         * include/ext/pb_ds/detail/unordered_iterator/iterator.hpp: Likewise.
3222         * include/ext/pb_ds/detail/unordered_iterator/point_const_iterator.hpp:
3223         Likewise.
3224         * include/ext/pb_ds/detail/unordered_iterator/point_iterator.hpp:
3225         Likewise.
3226
3227         * doc/doxygen/user.cfg.in: Regenerate with Doxygen 1.8.14 and set
3228         GROUP_NESTED_COMPOUNDS=YES and SORT_BY_SCOPE_NAME=NO. Add various
3229         _GLIBCXX_xxx macros and __attribute__(X) to PREDEFINED macros that
3230         Doxygen expands.
3231
3232 2019-05-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
3233
3234         * config/abi/post/i386-solaris2.10/baseline_symbols.txt: Regenerate.
3235         * config/abi/post/i386-solaris2.10/amd64/baseline_symbols.txt: Likewise.
3236         * config/abi/post/i386-solaris2.11/baseline_symbols.txt: Likewise.
3237         * config/abi/post/i386-solaris2.11/amd64/baseline_symbols.txt: Likewise.
3238         * config/abi/post/sparc-solaris2.10/baseline_symbols.txt: Likewise.
3239         * config/abi/post/sparc-solaris2.10/sparcv9/baseline_symbols.txt:
3240         Likewise.
3241         * config/abi/post/sparc-solaris2.11/baseline_symbols.txt: Likewise.
3242         * config/abi/post/sparc-solaris2.11/sparcv9/baseline_symbols.txt:
3243         Likewise.
3244
3245 2019-05-01  Jonathan Wakely  <jwakely@redhat.com>
3246
3247         PR libstdc++/61761
3248         * include/std/complex (__complex_proj): Return parameter unchanged.
3249         [_GLIBCXX_USE_C99_COMPLEX] (__complex_proj): Change overloads for
3250         floating-point types to take std::complex arguments.
3251         [_GLIBCXX_USE_C99_MATH_TR1] (__complex_proj): Add overloads for
3252         floating-point types.
3253         * testsuite/26_numerics/complex/proj.cc: New test.
3254
3255 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
3256
3257         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Change _Lock_policyE2 exports
3258         to _Lock_policyE[012].
3259         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
3260
3261 2019-04-30  Jonathan Wakely  <jwakely@redhat.com>
3262
3263         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Remove
3264         macros accidentally left in.
3265         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Remove
3266         unnecessary -lstdc++fs option. Fix test for mingw.
3267         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
3268         Fix test for mingw.
3269
3270 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
3271
3272         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
3273
3274 2019-04-29  Jonathan Wakely  <jwakely@redhat.com>
3275
3276         * include/bits/stl_algo.h (generate_n): Adjust doxygen comment.
3277
3278         * include/bits/move.h (swap(T&, T&), swap(T (&)[N], T (&)[N])): Use
3279         _GLIBCXX_NOEXCEPT_IF to simplify declarations.
3280
3281         PR libstdc++/71312
3282         * src/c++11/shared_ptr.cc (get_mutex): Align pool mutexes to 64 bytes.
3283
3284         * include/bits/stl_bvector.h (vector<bool>::empty()): Add nodiscard
3285         attribute.
3286
3287         * include/bits/stl_iterator_base_types.h (_Iter_base): Remove unused
3288         class template and partial specialization.
3289
3290         PR libstdc++/87982
3291         * include/bits/stl_algo.h (generate_n): Convert _Size parameter to
3292         an integral type.
3293         * include/bits/stl_algobase.h (__size_to_integer): New overloaded
3294         functions to convert a value to an integral type.
3295         (__fill_n_a, __fill_n_a): Assert that __n is already an integral type.
3296         (fill_n): Convert _Size parameter to an integral type.
3297         * testsuite/25_algorithms/fill_n/87982.cc: New test.
3298         * testsuite/25_algorithms/fill_n/87982_neg.cc: New test.
3299         * testsuite/25_algorithms/fill_n/dr426.cc: New test.
3300         * testsuite/25_algorithms/generate_n/87982.cc: New test.
3301         * testsuite/25_algorithms/generate_n/87982_neg.cc: New test.
3302         * testsuite/25_algorithms/generate_n/dr426.cc: New test.
3303
3304 2019-04-28  Nina Dinka Ranns  <dinka.ranns@gmail.com>
3305
3306         Adding noexcept-specification on tuple constructors (LWG 2899)
3307         * libstdc++-v3/include/std/tuple:
3308         (tuple()): Add noexcept-specification.
3309         (tuple(const _Elements&...)): Likewise
3310         (tuple(_UElements&&...)): Likewise
3311         (tuple(const tuple<_UElements...>&)): Likewise
3312         (tuple(tuple<_UElements...>&&)): Likewise
3313         (tuple(const _T1&, const _T2&)): Likewise
3314         (tuple(_U1&&, _U2&&)): Likewise
3315         (tuple(const tuple<_U1, _U2>&): Likewise
3316         (tuple(tuple<_U1, _U2>&&): Likewise
3317         (tuple(const pair<_U1, _U2>&): Likewise
3318         (tuple(pair<_U1, _U2>&&): Likewise
3319         * libstdc++-v3/testsuite/20_util/tuple/cons/noexcept_specs.cc: New
3320
3321 2019-04-27  Marc Glisse  <marc.glisse@inria.fr>
3322
3323         PR libstdc++/87106
3324         * include/bits/stl_uninitialized.h (__relocate_object_a): Mark the
3325         arguments with __restrict.
3326
3327 2019-04-26  H.J. Lu  <hongjiu.lu@intel.com>
3328
3329         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
3330
3331 2019-04-26  Jonathan Wakely  <jwakely@redhat.com>
3332
3333         * include/experimental/bits/fs_path.h
3334         (path::_S_convert_loc<_InputIterator>): Create const std::string to
3335         avoid redundant call to _S_convert_loc with non-const pointers.
3336
3337         * testsuite/20_util/variant/run.cc: Use a new Hashable type to test
3338         hashing, because pmr::string depends on _GLIBCXX_USE_CXX11_ABI==1.
3339         * testsuite/21_strings/basic_string/hash/hash.cc
3340         [!_GLIBCXX_USE_CXX11_ABI]: Don't test pmr strings.
3341         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc
3342         [!_GLIBCXX_USE_CXX11_ABI]: Likewise.
3343
3344         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Replace wildcard that matches
3345         wstring::_M_replace_dispatch with more specific patterns.
3346         * include/bits/fs_path.h (path::_S_convert_loc<_InputIterator>):
3347         Create const std::string to avoid redundant call to _S_convert_loc
3348         with non-const pointers.
3349         * include/bits/locale_conv.h (__do_str_codecvt): Use if-constexpr to
3350         avoid unnecessary basic_string::assign instantiations.
3351
3352         * include/std/memory (__uses_alloc_args): Add string-literal to
3353         static_assert, to match the one in __uses_alloc.
3354         [__cpp_concepts] (_Std_pair): Use C++2a syntax for concept.
3355         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: Check
3356         for recursive uses-allocator construction of nested pairs.
3357         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc:: Add
3358         comment.
3359
3360 2019-04-26  Jakub Jelinek  <jakub@redhat.com>
3361
3362         * config/abi/post/s390x-linux-gnu/32/baseline_symbols.txt: Update.
3363         * config/abi/post/s390-linux-gnu/baseline_symbols.txt: Update.
3364         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
3365         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
3366
3367         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
3368         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
3369         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
3370         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
3371         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
3372         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
3373         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
3374
3375 2019-04-25  Jonathan Wakely  <jwakely@redhat.com>
3376
3377         PR libstdc++/90239
3378         * doc/xml/manual/status_cxx2020.xml: Amend P0591R4 status.
3379         * include/std/scoped_allocator [__cplusplus > 201703L]
3380         (scoped_allocator_adaptor::construct): Define in terms of
3381         uses_allocator_construction_args, as per P0591R4.
3382         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc: New test.
3383         * testsuite/util/testsuite_allocator.h: Remove name of unused
3384         parameter.
3385
3386 2019-04-24  Jonathan Wakely  <jwakely@redhat.com>
3387
3388         * doc/xml/manual/status_cxx2017.xml: Document P0024R2 status.
3389         * doc/html/*: Regenerate.
3390
3391         * include/bits/fs_path.h (operator<, operator<=, operator>)
3392         (operator>=, operator==, operator!=): Make hidden friends, as per
3393         LWG 3065.
3394         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Fix
3395         string type in test.
3396         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
3397
3398         * include/std/any (any::any(ValueType&&)): Use __and_v.
3399         * include/std/numeric (midpoint(T, T, T), midpoint(T*, T*, T*)):
3400         Likewise.
3401
3402         * include/std/tuple (apply): Use remove_reference_t instead of decay_t
3403         as per P0777R1.
3404         * include/std/type_traits (__result_of_memfun): Use remove_reference
3405         instead of __remove_cvref_t and remove redundant is_same check.
3406         (__inv_unwrap): Use __remove_cvref_t instead of decay_t.
3407
3408         * include/experimental/string_view (basic_string_view::pointer)
3409         (basic_string_view::reference): Fix to refer to non-const value_type.
3410         * include/bits/basic_string.h (basic_string): Use __sv_check and
3411         __sv_limit instead of basic_string_view::_M_check and
3412         basic_string_view::_M_limit.
3413         * include/std/string_view (__sv_check, __sv_limit): New
3414         helper functions to replace basic_string_view::_M_check and
3415         basic_string_view::_M_limit.
3416         (basic_string_view): Add static assertions to enforce ill-formed
3417         requirement for traits_type::char_type from P1148R0, and to enforce
3418         required properties of char-like types.
3419         (basic_string_view::pointer, basic_string_view::reference): Fix to
3420         refer to non-const value_type.
3421         (basic_string_view::operator[], basic_string_view::at)
3422         (basic_string_view::front, basic_string_view::back)
3423         (basic_string_view::data): Use const_reference and const_pointer
3424         typedefs for return types.
3425         (basic_string_view::_M_check, basic_string_view::_M_limit): Remove.
3426         (hash<wstring_view>): Fix argument_type typedef.
3427         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
3428         char/1.cc: Fix expected return type of basic_string_view::data().
3429         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
3430         wchar_t/1.cc: Likewise.
3431         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
3432         char/1.cc: Likewise.
3433         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
3434         wchar_t/1.cc: Likewise.
3435         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
3436         New test.
3437         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
3438         Check reference and pointer typedefs.
3439         * testsuite/experimental/string_view/requirements/typedefs.cc:
3440         Likewise.
3441         * testsuite/experimental/string_view/modifiers/remove_prefix/char/1.cc:
3442         Fix expected return type of basic_string_view::data().
3443         * testsuite/experimental/string_view/modifiers/remove_prefix/wchar_t/
3444         1.cc: Likewise.
3445         * testsuite/experimental/string_view/modifiers/remove_suffix/char/1.cc:
3446         Likewise.
3447         * testsuite/experimental/string_view/modifiers/remove_suffix/wchar_t/
3448         1.cc: Likewise.
3449
3450         PR libstdc++/90220
3451         * include/std/any (__any_caster): Use remove_cv_t instead of decay_t.
3452         Avoid a runtime check for types that can never be stored in std::any.
3453         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
3454         array types.
3455
3456         PR libstdc++/90220 (partial)
3457         * include/std/any (any_cast<T>(any*), any_cast<T>(const any*)): Do
3458         not attempt ill-formed static_cast to pointers to non-object types.
3459         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
3460         function types.
3461
3462         * testsuite/20_util/variant/run.cc: Catch exception by reference to
3463         prevent -Wcatch-value warning.
3464
3465         * include/std/variant (__variant_construct): Use template parameter
3466         type instead of equivalent decltype-specifier.
3467         (_Move_ctor_base<false, Types...>::_Move_ctor_base(_Move_ctor_base&&)):
3468         Replace forward with move.
3469         (_Move_ctor_base<false, Types...>::_M_destructive_move)
3470         (_Move_ctor_base<false, Types...>::_M_destructive_copy)
3471         (_Move_ctor_base<true, Types...>::_M_destructive_move)
3472         (_Move_ctor_base<true, Types...>::_M_destructive_copy): Only set the
3473         index after construction succeeds.
3474         (_Copy_assign_base<false, Types...>::operator=): Remove redundant
3475         if-constexpr checks that are always true. Use __remove_cvref_t instead
3476         of remove_reference so that is_nothrow_move_constructible check
3477         doesn't use a const rvalue parameter. In the potentially-throwing case
3478         construct a temporary and move assign it, as per LWG 2904.
3479         (_Move_assign_base<false, Types...>::operator=): Remove redundant
3480         if-constexpr checks that are always true. Use emplace as per LWG 2904.
3481         (variant::operator=(T&&)): Only use emplace conditionally, otherwise
3482         construct a temporary and move assign from it, as per LWG 2904.
3483         * testsuite/20_util/variant/exception_safety.cc: Check that
3484         assignment operators have strong exception safety guarantee.
3485
3486 2019-04-23  Thomas Rodgers <trodgers@redhat.com>
3487
3488         Document PSTL linker flags
3489
3490         * doc/xml/manual/using.xml: Add PSTL linker flags to table 3.1.
3491
3492 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
3493
3494         * include/std/variant (__detail::__variant::_Traits): Make
3495         _S_trivial_copy_assign depend on _S_trivial_copy_ctor and make
3496         _S_trivial_move_assign depend on _S_trivial_move_ctor, as per
3497         P0602R4.
3498         (__detail::__variant::_Copy_assign_alias): Only depend on
3499         _S_trivial_copy_assign, which subsumes _S_trivial_copy_ctor now.
3500         * testsuite/20_util/variant/compile.cc: Correct checks for trivial
3501         move assignment operators.
3502
3503         PR libstdc++/90165
3504         * include/std/variant (variant::__not_self): New helper for the
3505         is_same_v<remove_cvref_t<T>, variant>==false constraints.
3506         (variant::__to_type_impl): Remove.
3507         (variant::__to_type): Add default argument to check pack size, instead
3508         of using __to_type_impl.
3509         (variant::__accepted_type): Add default argument using __not_self.
3510         (variant::__is_in_place_tag, variant::__not_in_place_tag): New helpers
3511         for variant(T&&) constructor constraint.
3512         (variant::variant(T&&)): Use __not_in_place_tag in constraints.
3513         Extract __accepted_type into a named template parameter for reuse in
3514         other constraints and in the exception specification.
3515         (variant::variant(in_place_type_t<T>, Args&&...))
3516         (variant::variant(in_place_type_t<T>, initializer_list<U>, Args&&...))
3517         (variant::variant(in_place_index_t<T>, Args&&...))
3518         (variant::variant(in_place_index_t<T>, initializer_list<U>, Args&&...))
3519         (variant::operator=T&&)): Remove redundant && from trait arguments.
3520         * testsuite/20_util/variant/compile.cc: Check variant(T&&) constructor
3521         isn't used for in_place_type or in_place_index arguments.
3522
3523         * include/std/type_traits (unwrap_reference_t): Define for C++2a.
3524         (unwrap_ref_decay): Remove inheritance from unwrap_reference.
3525         * testsuite/20_util/unwrap_reference/1.cc: Adjust test to use alias.
3526
3527 2019-04-23  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
3528             Bernd Edlinger  <bernd.edlinger@hotmail.de>
3529             Jakub Jelinek  <jakub@redhat.com>
3530
3531         PR target/89093
3532         * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Add
3533         general-regs-only target attribute for ARM.
3534
3535 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
3536
3537         PR libstdc++/87431
3538         * include/bits/basic_string.h (_Never_valueless_alt): Make partial
3539         specialization also depend on is_nothrow_move_constructible.
3540         * include/std/variant (__detail::__variant::__never_valueless()):
3541         Only true if the variant would have a move assignment operator.
3542         (__detail::__variant::_Variant_storage<false, T...>::_M_valid()):
3543         Check __never_valueless<T...>().
3544         (variant::emplace): Only perform non-throwing move assignments
3545         for never-valueless alternatives if the variant has a move assignment
3546         operator.
3547         * testsuite/20_util/variant/compile.cc: Check that never-valueless
3548         types can be emplaced into non-assignable variants.
3549         * testsuite/20_util/variant/run.cc: Check that never-valueless types
3550         don't get copied when emplaced into non-assignable variants.
3551
3552         * include/std/variant (__detail::__variant::__ref_cast): Remove
3553         unused function.
3554         (__detail::__variant::_Uninitialized::_M_get)
3555         (__detail::__variant::__get)
3556         (__gen_vtable_impl::__element_by_index_or_cookie): Add noexcept.
3557
3558 2019-04-21  Iain Sandoe  <iain@sandoe.co.uk>
3559
3560         * testsuite/17_intro/headers/c++1998/charset.cc: Skip for Darwin8
3561         to Darwin10.
3562         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
3563         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
3564         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
3565         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
3566
3567 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
3568
3569         Delegate PSTL configuration to pstl/pstl_config.h
3570
3571         * include/bits/c++config: Remove explicit PSTL configuration
3572         macros and use definitions from <pstl/pstl_config.h>.
3573
3574 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
3575
3576         Cleanup algorithm implementations
3577         * include/pstl/glue_algorithm_impl.h (stable_sort): Forward
3578         execution policy.
3579         (mismatch): Forward execution policy.
3580         (equal): Qualify call to std::equal().
3581         (partial_sort): Forward execution policy.
3582         (inplace_merge): Forward execution policy.
3583
3584 2019-04-19  Thomas Rodgers <trodgers@redhat.com>
3585
3586         Improve implementation of parallel equal()
3587         * include/pstl/algorithm_impl.h
3588         (__internal::__brick_equal): use "4 iterator" version of
3589         std::equal().
3590         (__internal::__brick_equal): use simd for random access
3591         iterators on unsequenced execution policies.
3592         (__internal::__pattern_equal): add "4 iterator" version
3593         (__internal::__pattern_equal): dispatch to simd __brick_equal
3594         for vector-only execution policies.
3595         (__internal::__pattern_equal): dispatch to __parallel_or for
3596         parallel execution policies.
3597         * include/pstl/glue_algorithm_impl.h
3598         (std::equal): dispatch to "4 iterator" version of
3599         __internal::__pattern_equal().
3600
3601 2019-04-17  Jonathan Wakely  <jwakely@redhat.com>
3602
3603         PR libstdc++/90105
3604         * include/bits/forward_list.h (operator==): Do not use operator!= to
3605         compare elements.
3606         (forward_list<T, A>::sort(Comp)): When elements are equal take the one
3607         earlier in the list, so that sort is stable.
3608         * testsuite/23_containers/forward_list/operations/90105.cc: New test.
3609         * testsuite/23_containers/forward_list/comparable.cc: Test with
3610         types that meet the minimum EqualityComparable and LessThanComparable
3611         requirements. Remove irrelevant comment.
3612
3613         * include/std/variant (__detail::__variant::_Traits::_S_copy_assign):
3614         Do not depend on whether all alternative types are move constructible.
3615         (__detail::__variant::_Copy_assign_base::operator=): Remove cv-quals
3616         from the operand when deciding whether to perform the assignment.
3617         * testsuite/20_util/variant/compile.cc (DeletedMoves): Define type
3618         with deleted move constructor and deleted move assignment operator.
3619         (default_ctor, copy_ctor, move_ctor, copy_assign, move_assign): Check
3620         behaviour of variants with DeletedMoves as an alternative.
3621         * testsuite/20_util/variant/run.cc (DeletedMoves): Define same type.
3622         (move_ctor, move_assign): Check that moving a variant with a
3623         DeletedMoves alternative falls back to copying instead of moving.
3624
3625         * testsuite/20_util/variant/compile.cc: Remove empty string literals
3626         from static_assert declarations.
3627
3628         * testsuite/20_util/variant/compile.cc (MoveCtorOnly): Fix type to
3629         actually match its name.
3630         (MoveCtorAndSwapOnly): Define new type that adds swap to MoveCtorOnly.
3631         (test_swap()): Fix result for MoveCtorOnly and check
3632         MoveCtorAndSwapOnly.
3633
3634         * include/std/optional (optional::value_or(U&&) &&): Add missing
3635         constexpr specifier.
3636         * testsuite/20_util/optional/constexpr/observers/4.cc: Check value_or
3637         for disengaged optionals and rvalue optionals.
3638         * testsuite/20_util/optional/observers/4.cc: Likewise.
3639
3640 2019-04-12  Thomas Rodgers  <trodgers@redhat.com>
3641
3642         * include/pstl/algorithm_impl.h: Uglify identfiers.
3643         * include/pstl/numeric_impl.h:  Uglify identfiers.
3644         * include/pstl/parallel_backend_tbb.h: Uglify identfiers.
3645
3646 2019-04-11  Thomas Rodgers  <trodgers@redhat.com>
3647
3648         * include/bits/c++config:
3649         Add definition for __PSTL_ASSERT.
3650         Add definition for __PSTL_ASSERT_MSG.
3651         * include/pstl/algorithm_impl.h: Replace use of assert().
3652         * include/pstl/numeric_impl.h: Replace use of assert().
3653         * include/pstl/parallel_backend_tbb.h:
3654         Replace use of assert().
3655         Replace use of __TBB_ASSERT().
3656         * include/pstl/parallel_backend_utils.h: Replace use of assert().
3657
3658 2019-04-11  Jonathan Wakely  <jwakely@redhat.com>
3659
3660         PR libstdc++/90046
3661         * src/c++17/memory_resource.cc
3662         (monotonic_buffer_resource::_Chunk::allocate): Increase alignment if
3663         needed to allow placing a _Chunk at the end of the buffer.
3664         (monotonic_buffer_resource::_M_new_buffer): Remove static_assert.
3665
3666 2019-04-10  Jonathan Wakely  <jwakely@redhat.com>
3667
3668         * doc/xml/faq.xml: Add information about emergency EH pool.
3669         * doc/xml/manual/debug.xml: Update list of memory debugging tools.
3670         Move outdated information on mt_allocator to a separate section.
3671         * doc/xml/manual/evolution.xml: Clarify that GLIBCXX_FORCE_NEW
3672         doesn't affect the default allocator.
3673
3674         * testsuite/lib/libstdc++.exp (check_v3_target_parallel_mode): Fix
3675         typo.
3676
3677         PR libstdc++/89851
3678         * testsuite/20_util/variant/89851.cc: New test.
3679
3680 2019-04-09  Jonathan Wakely  <jwakely@redhat.com>
3681
3682         * include/std/variant: Adjust whitespace. Add comments.
3683         (_Multi_array): Leave primary template undefined.
3684         (_Multi_array<_Tp>): Define partial specialization for base case of
3685         recursion.
3686         (__gen_vtable_impl, __gen_vtable): Remove redundant && from type
3687         which is always a reference.
3688         (__gen_vtable::_S_apply()): Remove function, inline body into
3689         default member initializer.
3690         * testsuite/20_util/variant/visit.cc: Test with noncopyable types.
3691
3692         * include/std/variant (__variant_idx_cookie): Add member type.
3693         (__visitor_result_type): Remove.
3694         (__do_visit): Use invoke_result instead of __visitor_result_type.
3695         * testsuite/20_util/variant/visit.cc: New test.
3696
3697         PR libstdc++/90008
3698         * include/std/variant (_VARIANT_RELATION_FUNCTION_TEMPLATE): Remove
3699         unused capture.
3700         * testsuite/20_util/variant/90008.cc: New test.
3701
3702 2019-04-09  Thomas Rodgers  <trodgers@redhat.com>
3703
3704         * include/pstl/algorithm_impl.h: Add namespace qualification.
3705         * include/pstl/execution_defs.h: Add namespace qualification.
3706         * include/pstl/execution_impl.h: Add namespace qualification.
3707         * include/pstl/numeric_impl.h: Add namespace qualification.
3708         * include/pstl/parallel_backend_tbb.h: Add namespace qualification.
3709         * include/pstl/unseq_backend_simd.h: Add namespace qualification.
3710         * include/pstl/parallel_backend_utils.h: Include <cassert>.
3711
3712 2019-04-08  Ville Voutilainen  <ville.voutilainen@gmail.com>
3713
3714         Fix visit<R> for variant.
3715         * include/std/variant (__do_visit): Add a template parameter
3716         for enforcing same return types for visit.
3717         (__gen_vtable_impl): Likewise.
3718         (_S_apply_single_alt): Adjust.
3719         (__visit_invoke_impl): New. Handle casting to void.
3720         (__do_visit_invoke): New. Enforces same return types.
3721         (__do_visit_invoke_r): New. Converts return types.
3722         (__visit_invoke): Adjust.
3723         (__gen_vtable):  Add a template parameter for enforcing
3724         same return types for visit.
3725         * testsuite/20_util/variant/visit_r.cc: Add a test for a visitor with
3726         different return types.
3727         * testsuite/20_util/variant/visit_neg.cc: New. Ensures that
3728         visitors with different return types don't accidentally
3729         compile with regular visitation.
3730
3731 2019-04-08  Christophe Lyon  <christophe.lyon@linaro.org>
3732
3733         * testsuite/27_io/filesystem/iterators/caching.cc: Add
3734         dg-require-filesystem-ts.
3735
3736 2019-04-05  Jonathan Wakely  <jwakely@redhat.com>
3737
3738         * doc/xml/manual/status_cxx2020.xml: Update status.
3739         * include/std/variant (visit<R>): Define for C++2a (P0655R1).
3740         * testsuite/20_util/variant/visit_r.cc: New test.
3741
3742         * include/bits/fs_dir.h (directory_iterator::operator*)
3743         (directory_iterator::operator->): Add noexcept.
3744         (operator==, operator!=): Replace namespace-scope equality operators
3745         for directory iterators with hidden friends.
3746
3747         PR libstdc++/89986
3748         * config/abi/pre/gnu.ver: Add missing exports.
3749         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Test
3750         increment member.
3751
3752         * config/abi/pre/gnu.ver: Export new symbols.
3753         * include/bits/fs_dir.h (recursive_directory_iterator::options())
3754         (recursive_directory_iterator::recursion_pending())
3755         (recursive_directory_iterator::disable_recursion_pending()): Remove
3756         inline definitions. Make noexcept.
3757         (recursive_directory_iterator::depth())
3758         (recursive_directory_iterator::operator*())
3759         (recursive_directory_iterator::operator->()): Make noexcept.
3760         (recursive_directory_iterator::_M_options)
3761         (recursive_directory_iterator::_M_pending): Remove data members.
3762         * src/c++17/fs_path.cc (_Dir_stack): Add constructor and data members.
3763         (recursive_directory_iterator::recursive_directory_iterator): Remove
3764         ctor-initializer. Use new constructor for _Dir_stack.
3765         (recursive_directory_iterator::options())
3766         (recursive_directory_iterator::recursion_pending())
3767         (recursive_directory_iterator::disable_recursion_pending()): Add
3768         non-inline definitions.
3769         (recursive_directory_iterator::depth()): Make noexcept.
3770         (recursive_directory_iterator::increment(error_code&))
3771         (recursive_directory_iterator::pop(error_code&)): Adjust to new
3772         location of options and recursion_pending members.
3773         * testsuite/27_io/filesystem/iterators/recursion_pending.cc: New test.
3774         * testsuite/util/testsuite_fs.h (__gnu_test::scoped_file): Add
3775         user-declared move constructor and assignment operator, to make the
3776         type move-only.
3777
3778         * src/c++17/fs_dir.cc (_Dir::advance(bool, error_code&)): Handle
3779         d_type == DT_UNKNOWN immediately.
3780         (_Dir::should_recurse(bool, error_code&)): Remove file_type::unknown
3781         handling here.
3782         * testsuite/27_io/filesystem/iterators/caching.cc: New test.
3783
3784         * include/bits/fs_path.h (path::operator=(path&&)): Check for self
3785         assignment.
3786         * src/c++17/fs_path.cc (path::operator=(const path&)): Likewise.
3787         * testsuite/27_io/filesystem/path/assign/copy.cc: Test self
3788         assignment.
3789
3790         PR libstdc++/87431 (again)
3791         * include/bits/basic_string.h (__variant::_Never_valueless_alt):
3792         Define partial specialization for basic_string.
3793         * include/bits/shared_ptr.h (_Never_valueless_alt): Likewise for
3794         shared_ptr and weak_ptr.
3795         * include/bits/std_function.h (_Never_valueless_alt): Likewise for
3796         function.
3797         * include/bits/stl_vector.h (_Never_valueless_alt): Likewise for
3798         vector.
3799         * include/bits/unique_ptr.h (_Never_valueless_alt): Likewise for
3800         unique_ptr.
3801         * include/debug/vector (_Never_valueless_alt): Likewise for debug
3802         vector.
3803         * include/std/any (_Never_valueless_alt): Define explicit
3804         specialization for any.
3805         * include/std/variant (_Never_valueless_alt): Define primary template.
3806         (__never_valueless): Use _Never_valueless_alt instead of
3807         is_trivially_copyable.
3808         (variant::emplace<N>(Args&&...)): Add special case for non-throwing
3809         initializations to avoid try-catch overhead. Add special case for
3810         scalars produced by potentially-throwing conversions. Use
3811         _Never_valueless_alt instead of is_trivially_copyable for the
3812         remaining strong exception-safety cases.
3813         (variant::emplace<N>(initializer_list<U>, Args&&...)): Likewise.
3814         * testsuite/20_util/variant/87431.cc: Run both test functions.
3815         * testsuite/20_util/variant/exception_safety.cc: New test.
3816         * testsuite/20_util/variant/run.cc: Use pmr::string instead of string,
3817         so the variant becomes valueless.
3818
3819 2019-04-03  Jonathan Wakely  <jwakely@redhat.com>
3820
3821         PR libstdc++/85184
3822         * include/std/variant (_Copy_assign_base, _Move_assign_base, variant):
3823         Remove assertions.
3824         (variant::emplace<_Tp>): Return result of emplace<N> directly.
3825
3826         * include/std/string (__hash_string_base): New class template defining
3827         operator() for hashing strings.
3828         (hash<pmr::string>, hash<pmr::u8string>, hash<pmr::u16string>)
3829         (hash<pmr::u32string>, hash<pmr::wstring>): Define for C++17.
3830         * testsuite/21_strings/basic_string/hash/hash.cc: New test.
3831         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc: New test.
3832
3833 2019-04-01  Ville Voutilainen  <ville.voutilainen@gmail.com>
3834
3835         Use single-visitation in variant assignment and swap and relops.
3836         Also use indices instead of types when checking whether
3837         variants hold the same thing.
3838         * include/std/variant (__do_visit): Add a template parameter
3839         for index visitation, invoke with indices if index visitation
3840         is used.
3841         (__variant_idx_cookie): New.
3842         (__visit_with_index): Likewise.
3843         (_Copy_assign_base::operator=): Do single-visitation with
3844         an index visitor.
3845         (_Move_assign_base::operator=): Likewise.
3846         (_Extra_visit_slot_needed): Adjust.
3847         (__visit_invoke): Call with indices if it's an index visitor.
3848         (relops): Do single-visitation with an index visitor.
3849         (swap): Likewise.
3850         (__visitor_result_type): New.
3851
3852 2019-03-30  Eric Botcazou  <ebotcazou@adacore.com>
3853
3854         * src/c++17/fs_ops.cc (fs::permissions): Use std::errc::not_supported.
3855
3856 2019-03-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
3857
3858         Don't revisit a variant we are already visiting.
3859         * include/std/variant (__variant_construct_single): New.
3860         (__variant_construct): Use it.
3861         (_M_destructive_move): Likewise.
3862         (_M_destructive_copy): Likewise.
3863         (_Copy_assign_base::operator=): Adjust.
3864         (_Move_assign_base::operator=): Likewise.
3865         (swap): Likewise.
3866
3867 2019-03-26  Jonathan Wakely  <jwakely@redhat.com>
3868
3869         PR libstdc++/85965
3870         * include/bits/hashtable.h (_Hashtable): Move static assertions to
3871         destructor so they are not evaluated until the _Key type is complete.
3872         * include/bits/stl_tree.h (_Rb_tree): Likewise.
3873         * testsuite/23_containers/set/85965.cc: New test.
3874         * testsuite/23_containers/unordered_set/85965.cc: New test.
3875         * testsuite/23_containers/map/48101_neg.cc: Replace "here" errors
3876         with regexp matching the corresponding _Rb_tree specialization.
3877         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
3878         * testsuite/23_containers/multiset/48101_neg.cc: Remove "here" error.
3879         * testsuite/23_containers/set/48101_neg.cc: Likewise.
3880         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
3881         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
3882         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
3883         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
3884
3885 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
3886
3887         PR libstdc++/89825
3888         Fix based on a suggestion by Antony Polukhin.
3889         * include/std/variant (__never_valueless): New.
3890         (_M_valid): Use it.
3891         (_Extra_visit_slot_needed): New.
3892         (_Multi_array): Use it.
3893         (_S_apply_all_alts): Likewise.
3894
3895 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
3896
3897         PR libstdc++/89824
3898         Fix based on a suggestion by Antony Polukhin.
3899         * include/std/variant (__gen_vtable): Don't reserve an
3900         additional table slot, _Multi_array already does that.
3901
3902 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
3903
3904         PR libstdc++/89816
3905         Fix based on a suggestion by Antony Polukhin.
3906         * include/std/variant (__variant_construct): Capture a pointer
3907         to the storage and visit just one variant.
3908
3909 2019-03-22  Jonathan Wakely  <jwakely@redhat.com>
3910
3911         * doc/xml/manual/backwards_compatibility.xml: Remove link to
3912         Doxygen-generated pages with unstable URL.
3913         * doc/xml/manual/concurrency_extensions.xml: Likewise.
3914         * doc/xml/manual/extensions.xml: Likewise.
3915         * doc/xml/manual/parallel_mode.xml: Likewise.
3916         * doc/xml/manual/support.xml: Likewise.
3917
3918         * include/bits/stl_algobase.h (__lg): Do arithmetic on type int to
3919         avoid -Wconversion warnings.
3920
3921 2019-03-21  Thomas Rodgers  <trodgers@redhat.com>
3922
3923         * include/Makefile.am (std_header): Add ${std_srcdir}/execution.
3924         (pstl_srcdir, pstl_builddir, pstl_headers): New variables.
3925         (allstamped): Add stamp-pstl.
3926         (install-headers): Add ptsl_builddir.
3927         * include/Makefile.in: Regenerate.
3928         * include/bits/c++config: Add pstl configuration.
3929         * include/pstl/LICENSE.txt: New file.
3930         * include/pstl/algorithm_fwd.h: New file.
3931         * include/pstl/algorithm_impl.h: New file.
3932         * include/pstl/execution_defs.h: New file.
3933         * include/pstl/execution_impl.h: New file.
3934         * include/pstl/glue_algorithm_defs.h: New file.
3935         * include/pstl/glue_algorithm_impl.h: New file.
3936         * include/pstl/glue_execution_defs.h: New file.
3937         * include/pstl/glue_memory_defs.h: New file.
3938         * include/pstl/glue_memory_impl.h: New file.
3939         * include/pstl/glue_numeric_defs.h: New file.
3940         * include/pstl/glue_numeric_impl.h: New file.
3941         * include/pstl/memory_impl.h: New file.
3942         * include/pstl/numeric_fwd.h: New file.
3943         * include/pstl/numeric_impl.h: New file.
3944         * include/pstl/parallel_backend.h: New file.
3945         * include/pstl/parallel_backend_tbb.h: New file.
3946         * include/pstl/parallel_backend_utils.h: New file.
3947         * include/pstl/parallel_impl.h: New file.
3948         * include/pstl/pstl_config.h: New file.
3949         * include/pstl/unseq_backend_simd.h: New file.
3950         * include/pstl/utils.h: New file.
3951         * include/std/algorithm: Include parallel algorithm implementations.
3952         * include/std/execution: New file.
3953         * include/std/memory: Include parallel algorithm implementations.
3954         * include/std/numeric: Include parallel algorithm implementations.
3955         * include/std/version: Add parallel algorithms feature test macro.
3956         * testsuite/util/pstl/pstl_test_config.h: New file.
3957         * testsuite/util/pstl/test_utils.h: New file.
3958         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
3959         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
3960         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
3961         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
3962         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
3963         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
3964         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
3965         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
3966         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
3967         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
3968         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
3969         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
3970         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
3971         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
3972         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
3973         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
3974         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
3975         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
3976         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
3977         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
3978         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
3979         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
3980         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
3981         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
3982         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
3983         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
3984         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
3985         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
3986         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
3987         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
3988         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
3989         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
3990         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
3991         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
3992         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
3993         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
3994         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
3995         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
3996         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
3997         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
3998         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
3999         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
4000         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
4001         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
4002         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
4003         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
4004         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
4005         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
4006         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
4007         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
4008         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
4009         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
4010         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
4011         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
4012         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
4013         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
4014         * testsuite/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
4015         * testsuite/testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
4016         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
4017         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
4018         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
4019         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
4020         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
4021         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
4022         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
4023         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
4024         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
4025         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
4026         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
4027         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
4028         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
4029         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
4030         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
4031         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
4032         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
4033         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
4034         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
4035         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
4036         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
4037         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
4038         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
4039         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
4040         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
4041         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
4042         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
4043         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
4044         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
4045         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
4046         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
4047         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
4048         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
4049         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
4050         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
4051         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
4052         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
4053         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
4054         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
4055         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
4056         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
4057         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
4058         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
4059         * testsuite/testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
4060         * testsuite/testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
4061         * testsuite/testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
4062         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
4063         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
4064
4065 2019-03-21  Jonathan Wakely  <jwakely@redhat.com>
4066
4067         * include/c_compatibility/math.h [!__STDCPP_WANT_MATH_SPEC_FUNCS__]
4068         (assoc_laguerre, assoc_laguerref, assoc_laguerrel, assoc_legendre)
4069         (assoc_legendref, assoc_legendrel, beta, betaf, betal, comp_ellint_1)
4070         (comp_ellint_1f, comp_ellint_1l, comp_ellint_2, comp_ellint_2f)
4071         (comp_ellint_2l, comp_ellint_3, comp_ellint_3f, comp_ellint_3l)
4072         (cyl_bessel_i, cyl_bessel_if, cyl_bessel_il, cyl_bessel_j)
4073         (cyl_bessel_jf, cyl_bessel_jl, cyl_bessel_k, cyl_bessel_kf)
4074         (cyl_bessel_kl, cyl_neumann, cyl_neumannf, cyl_neumannl, ellint_1)
4075         (ellint_1f, ellint_1l, ellint_2, ellint_2f, ellint_2l, ellint_3)
4076         (ellint_3f, ellint_3l, expint, expintf, expintl, hermite, hermitef)
4077         (hermitel, laguerre, laguerref, laguerrel, legendre, legendref)
4078         (legendrel, riemann_zeta, riemann_zetaf, riemann_zetal, sph_bessel)
4079         (sph_besself, sph_bessell, sph_legendre, sph_legendref, sph_legendrel)
4080         (sph_neumann, sph_neumannf, sph_neumannl): Only add using-declarations
4081         when the special functions IS is enabled, not for C++17.
4082         * testsuite/26_numerics/headers/cmath/functions_global_c++17.cc:
4083         Replace with ...
4084         * testsuite/26_numerics/headers/cmath/functions_global.cc: New test,
4085         without checks for special functions in C++17.
4086         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
4087         New test.
4088
4089         PR libstdc++/88066
4090         * include/backward/hash_map: Use <> for includes not "".
4091         * include/backward/hash_set: Likewise.
4092         * include/backward/strstream: Likewise.
4093         * include/tr1/bessel_function.tcc: Likewise.
4094         * include/tr1/exp_integral.tcc: Likewise.
4095         * include/tr1/legendre_function.tcc: Likewise.
4096         * include/tr1/modified_bessel_func.tcc: Likewise.
4097         * include/tr1/riemann_zeta.tcc: Likewise.
4098
4099 2019-03-19  Jonathan Wakely  <jwakely@redhat.com>
4100
4101         * doc/xml/manual/allocator.xml: Link to table documenting evolution
4102         of extension allocators.
4103         * doc/xml/manual/evolution.xml: Use angle brackets for header names.
4104         Document new headers in 7.2, 8.1 and 9.1 releases.
4105         * doc/xml/manual/using.xml: Adjust link target for new_allocator.
4106         * doc/html/*: Regenerate.
4107
4108 2019-03-12  John David Anglin  <dave.anglin@bell.net>
4109
4110         PR libstdc++/89461
4111         * testsuite/lib/libstdc++.exp: Locate libatomic.
4112         * testsuite/lib/dg-options.exp (add_options_for_libatomic): New.
4113         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc: Add
4114         libatomic options.
4115         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc: Likewise.
4116         * testsuite/experimental/net/timer/waitable/cons.cc: Likewise.
4117         * testsuite/experimental/net/timer/waitable/dest.cc: Likewise.
4118         * testsuite/experimental/net/timer/waitable/ops.cc: Likewise.
4119
4120 2019-03-11  Jonathan Wakely  <jwakely@redhat.com>
4121
4122         PR libstdc++/89460
4123         * configure.ac: Check for sockatmark.
4124         * crossconfig.m4: Check for sockatmark.
4125         * config.h.in: Regenerate.
4126         * configure: Regenerate.
4127         * include/experimental/internet (address_v4::_S_hton): Rename
4128         overloaded functions to _S_hton_16 and _S_ntoh_16.
4129         (address_v4::_S_ntoh): Rename to _S_ntoh_16 and _S_ntoh_32.
4130         (basic_endpoint): Adjust calls to _S_hton and _S_ntoh.
4131         * include/experimental/socket (basic_socket::at_mark): Check
4132         _GLIBCXX_HAVE_SOCKATMARK.
4133
4134         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc: Use
4135         const variables instead of macros.
4136
4137         PR libstdc++/89629
4138         * libsupc++/hash_bytes.cc [__SIZEOF_SIZE_T__ == 8] (_Hash_bytes):
4139         Use correct type for len_aligned.
4140         * testsuite/20_util/hash/89629.cc: New test.
4141
4142 2019-03-11  Jakub Jelinek  <jakub@redhat.com>
4143
4144         PR libstdc++/89641
4145         * include/std/atomic (atomic<T>::store, atomic<T>::load,
4146         atomic<T>::exchange, atomic<T>::compare_exchange_weak,
4147         atomic<T>::compare_exchange_strong): Cast __m or __s and __f to int.
4148         * include/bits/atomic_base.h (__atomic_base<T>::operator++,
4149         __atomic_base<T>::operator--, __atomic_base<T>::operator+=,
4150         __atomic_base<T>::operator-=, __atomic_base<T>::operator&=,
4151         __atomic_base<T>::operator|=, __atomic_base<T>::operator^=,
4152         __atomic_base<T*>::operator++, __atomic_base<T*>::operator--,
4153         __atomic_base<T*>::operator+=, __atomic_base<T*>::operator-=): Cast
4154         memory_order_seq_cst to int.
4155
4156 2019-03-08  Jonathan Wakely  <jwakely@redhat.com>
4157
4158         * doc/xml/manual/using.xml: Use link element instead of xref.
4159         * doc/html/*: Regenerate.
4160
4161         * include/bits/fs_path.h (path::format): Add fixed underlying type.
4162
4163 2019-03-08  François Dumont  <fdumont@gcc.gnu.org>
4164
4165         PR libstdc++/89477
4166         * include/debug/map.h (map): Use _RequireNotAllocator to constrain
4167         parameters in deduction guides.
4168         * include/debug/multimap.h (multimap): Likewise.
4169         * include/debug/set.h (multimap): Likewise.
4170         * include/debug/multiset.h (multimap): Likewise.
4171         * include/debug/unordered_map (unordered_map): Likewise.
4172         (unordered_multimap): Likewise.
4173         * include/debug/unordered_set (unordered_set): Likewise.
4174         (unordered_multiset): Likewise.
4175
4176         PR libstdc++/89608
4177         * include/debug/unordered_map (unordered_map<>::_M_check_rehashed):
4178         Invalidate all iterators in case of rehash.
4179         (unordered_multimap<>::_M_check_rehashed): Likewise.
4180         * include/debug/unordered_set
4181         (unordered_set<>::_M_check_rehashed): Likewise.
4182         (unordered_multiset<>::_M_check_rehashed): Likewise.
4183         * testsuite/23_containers/unordered_set/debug/89608_neg.cc: New.
4184
4185 2019-03-07  Andreas Schwab  <schwab@suse.de>
4186
4187         * config/abi/post/riscv64-linux-gnu: New directory.
4188         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: New file.
4189
4190 2019-03-07  Jonathan Wakely  <jwakely@redhat.com>
4191
4192         * testsuite/20_util/function_objects/bind_front/1.cc: Change from
4193         compile test to run. Fix typo.
4194
4195         * doc/xml/manual/status_cxx2020.xml: Update C++20 status.
4196         * doc/html/*: Regenerate.
4197
4198         P0356R5 Simplified partial function application
4199         * include/std/functional [C++20] (_Bind_front, _Bind_front_t): Define
4200         helpers for bind_front.
4201         (bind_front, __cpp_lib_bind_front): Define.
4202         * testsuite/20_util/function_objects/bind_front/1.cc: New test.
4203
4204 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
4205
4206         * include/std/type_traits (__cpp_lib_bounded_array_traits): Define.
4207         * include/std/version (__cpp_lib_bounded_array_traits): Likewise.
4208         * testsuite/20_util/is_bounded_array/value.cc: Check for macro.
4209         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
4210
4211 2019-03-06  Edward Smith-Rowland  <3dw4rd@verizon.net>
4212
4213         PR libstdc++/86655 - std::assoc_legendre should not constrain
4214         the value of m (or x).
4215         * include/tr1/legendre_function.tcc (__assoc_legendre_p,
4216         __sph_legendre): If degree > order Don't throw, return 0.
4217         (__legendre_p, __assoc_legendre_p): Don't constrain x either.
4218         * testsuite/special_functions/02_assoc_legendre/pr86655.cc: New test.
4219         * testsuite/special_functions/20_sph_legendre/pr86655.cc: New test.
4220         * testsuite/tr1/5_numerical_facilities/special_functions/
4221         02_assoc_legendre/pr86655.cc: New test.
4222         * testsuite/tr1/5_numerical_facilities/special_functions/
4223         22_sph_legendre/pr86655.cc: New test.
4224
4225 2019-03-06  Ville Voutilainen  <ville.voutilainen@gmail.com>
4226
4227         Rewrite variant.
4228         Also PR libstdc++/85517
4229         * include/std/variant (__do_visit): New.
4230         (__variant_cast): Likewise.
4231         (__variant_cookie): Likewise.
4232         (__erased_*): Remove.
4233         (_Variant_storage::_S_vtable): Likewise.
4234         (_Variant_storage::__M_reset_impl): Adjust to use __do_visit.
4235         (_Variant_storage::__M_reset): Adjust.
4236         (__variant_construct): New.
4237         (_Copy_ctor_base(const _Copy_ctor_base&)): Adjust to use
4238         __variant_construct.
4239         (_Move_ctor_base(_Move_ctor_base&&)): Likewise.
4240         (_Move_ctor_base::__M_destructive_copy): New.
4241         (_Move_ctor_base::__M_destructive_move): Adjust to use
4242         __variant_construct.
4243         (_Copy_assign_base::operator=): Adjust to use __do_visit.
4244         (_Copy_assign_alias): Adjust to check both copy assignment
4245         and copy construction for triviality.
4246         (_Move_assign_base::operator=): Adjust to use __do_visit.
4247         (_Multi_array): Add support for visitors that accept and return
4248         a __variant_cookie.
4249         (__gen_vtable_impl::_S_apply_all_alts): Likewise.
4250         (__gen_vtable_impl::_S_apply_single_alt): Likewise.
4251         (__gen_vtable_impl::__element_by_index_or_cookie): New. Generate
4252         a __variant_cookie temporary for a variant that is valueless and..
4253         (__gen_vtable_impl::__visit_invoke): ..adjust here.
4254         (__gen_vtable::_Array_type): Conditionally make space for
4255         the __variant_cookie visitor case.
4256         (__variant_construct_by_index): New.
4257         (get_if): Adjust to use std::addressof.
4258         (relops): Adjust to use __do_visit.
4259         (variant): Add __variant_cast and __variant_construct_by_index
4260         as friends.
4261         (variant::emplace): Use _M_reset() and __variant_construct_by_index
4262         instead of self-destruction.
4263         (variant::swap): Adjust to use __do_visit.
4264         (visit): Reimplement in terms of __do_visit.
4265         (__variant_hash_call_base_impl::operator()): Adjust to use __do_visit.
4266         * testsuite/20_util/variant/compile.cc: Adjust.
4267         * testsuite/20_util/variant/run.cc: Likewise.
4268
4269 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
4270
4271         * include/bits/c++config.h (_cpp_lib_char8_t): Add L suffix to
4272         constant.
4273         * testsuite/experimental/feat-char8_t.cc: Likewise.
4274
4275          * include/std/type_traits [C++20] (is_bounded_array)
4276          (is_unbounded_array, is_bounded_array_v, is_unbounded_array_v):
4277          Define.
4278          * testsuite/20_util/is_bounded_array/requirements/
4279          explicit_instantiation.cc: New test.
4280          * testsuite/20_util/is_bounded_array/requirements/typedefs.cc: New
4281          test.
4282          * testsuite/20_util/is_bounded_array/value.cc: New test.
4283          * testsuite/20_util/is_unbounded_array/requirements/
4284          explicit_instantiation.cc: New test.
4285          * testsuite/20_util/is_unbounded_array/requirements/typedefs.cc: New
4286          * test.
4287          * testsuite/20_util/is_unbounded_array/value.cc: New test.
4288
4289         * include/bits/ptr_traits.h [C++20] (pointer_traits<T*>::pointer_to):
4290         Add constexpr.
4291         * testsuite/20_util/pointer_traits/pointer_to_constexpr.cc: New test.
4292
4293 2019-03-05  Jonathan Wakely  <jwakely@redhat.com>
4294
4295         * include/c_compatibility/math.h [C++20] (lerp): Add using
4296         declaration.
4297         * include/c_global/cmath [C++20] (__cpp_lib_interpolate): Define.
4298         (__lerp): Define function template to implement lerp.
4299         (lerp(float, float, float), lerp(double, double, double))
4300         (lerp(long double, long double, long double)): Define for C++20.
4301         * include/std/numeric [C++20] (__cpp_lib_interpolate): Define.
4302         (midpoint(T, T), midpoint(T*, T*)): Define.
4303         * include/std::version [C++20] (__cpp_lib_interpolate): Define.
4304         * testsuite/26_numerics/lerp.cc: New test.
4305         * testsuite/26_numerics/midpoint/floating.cc: New test.
4306         * testsuite/26_numerics/midpoint/integral.cc: New test.
4307         * testsuite/26_numerics/midpoint/pointer.cc: New test.
4308
4309 2019-03-04  Edward Smith-Rowland  <3dw4rd@verizon.net>
4310
4311         PR libstdc++/88996 Implement P0439R0
4312         Make std::memory_order a scoped enumeration.
4313         * include/bits/atomic_base.h: For C++20 make memory_order a scoped enum,
4314         add variables for the old enumerators.  Adjust calls.
4315         * testsuite/29_atomics/headers/atomic/types_std_c++2a.cc: New test.
4316         * testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc: New test.
4317
4318 2019-03-04  Jonathan Wakely  <jwakely@redhat.com>
4319
4320         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Remove bogus dg-do
4321         directive.
4322
4323         * include/std/memory_resource (polymorphic_allocator): Add default
4324         template argument for C++20.
4325         (polymorphic_allocator::allocate_bytes)
4326         (polymorphic_allocator::deallocate_bytes)
4327         (polymorphic_allocator::allocate_object)
4328         (polymorphic_allocator::deallocate_object)
4329         (polymorphic_allocator::new_object)
4330         (polymorphic_allocator::delete_object): New member functions for
4331         C++20.
4332         * testsuite/20_util/polymorphic_allocator/allocate_object.cc: New
4333         test.
4334
4335 2019-03-03  Jonathan Wakely  <jwakely@redhat.com>
4336
4337         PR libstdc++/89562
4338         * src/filesystem/ops-common.h (do_copy_file): Open files in binary
4339         mode for mingw.
4340
4341 2019-03-01  Jonathan Wakely  <jwakely@redhat.com>
4342
4343         * testsuite/util/testsuite_allocator.h (__gnu_test::memory_resource)
4344         [!__cpp_sized_deallocation]: Do not pass size to operator delete.
4345
4346         * include/std/memory (uses_allocator_construction_args): New set of
4347         overloaded functions.
4348         (make_obj_using_allocator, uninitialized_construct_using_allocator):
4349         New functions.
4350         * include/std/memory_resource (polymorphic_allocator::construct)
4351         [__cplusplus > 201703l]: Replace all overloads with a single function
4352         using uses_allocator_construction_args.
4353         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: New
4354         test.
4355         * testsuite/20_util/uses_allocator/make_obj.cc: New test.
4356
4357 2019-02-27  Jonathan Wakely  <jwakely@redhat.com>
4358
4359         PR libstdc++/89466
4360         * acinclude.m4 (GLIBCXX_CONFIGURE_DOCBOOK): Reorder check for local
4361         stylesheet directories before check for xsltproc. Try to use
4362         xmlcatalog to find local stylesheet directory before trying hardcoded
4363         paths. Add path used by suse to hardcoded paths. Adjust xsltproc
4364         check to look for the same stylesheet as doc/Makefile.am uses. Don't
4365         use xsltproc if xmlcatalog fails to find a local stylesheet.
4366         * configure.ac: Check for xmlcatalog.
4367         * Makefile.in: Regenerate.
4368         * configure: Likewise.
4369         * doc/Makefile.in: Likewise.
4370         * include/Makefile.in: Likewise.
4371         * libsupc++/Makefile.in: Likewise.
4372         * po/Makefile.in: Likewise.
4373         * python/Makefile.in: Likewise.
4374         * src/Makefile.in: Likewise.
4375         * src/c++11/Makefile.in: Likewise.
4376         * src/c++17/Makefile.in: Likewise.
4377         * src/c++98/Makefile.in: Likewise.
4378         * src/filesystem/Makefile.in: Likewise.
4379         * testsuite/Makefile.in: Likewise.
4380
4381 2019-02-26  Jonathan Wakely  <jwakely@redhat.com>
4382
4383         PR libstdc++/89477
4384         * include/bits/alloc_traits.h (_RequireNotAllocator): New helper for
4385         container deduction guides.
4386         * include/bits/hashtable.h (_RequireNotAllocatorOrIntegral): Likewise.
4387         * include/bits/stl_map.h (map): Use _RequireNotAllocator to constrain
4388         parameters in deduction guides.
4389         * include/bits/stl_multimap.h (multimap): Likewise.
4390         * include/bits/stl_multiset.h (multiset): Likewise.
4391         * include/bits/stl_queue.h (queue, priority_queue): Likewise.
4392         * include/bits/stl_set.h (set): Likewise.
4393         * include/bits/stl_stack.h (stack): Likewise.
4394         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
4395         use _RequireNotAllocator and _RequireNotAllocatorOrIntegral to
4396         constrain parameters in deduction guides.
4397         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
4398         Likewise.
4399         * testsuite/23_containers/map/cons/deduction.cc: Test additional
4400         deduction cases.
4401         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
4402         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
4403         * testsuite/23_containers/unordered_map/cons/deduction.cc: Likewise.
4404         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
4405         Likewise.
4406         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
4407         Likewise.
4408         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
4409
4410         PR libstdc++/89416
4411         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Change
4412         to class template and partial specialization using void_t.
4413         (__is_copy_insertable, __is_move_insertable): Adjust base class.
4414
4415 2019-02-24  Jonathan Wakely  <jwakely@redhat.com>
4416
4417         PR libstdc++/89416
4418         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Make
4419         copy and move members public.
4420
4421 2019-02-23  Jonathan Wakely  <jwakely@redhat.com>
4422
4423         * include/std/type_traits (__underlying_type_impl): New helper to
4424         make underlying_type SFINAE-friendly.
4425         (underlying_type): Derive from __underlying_type_impl.
4426         * testsuite/20_util/underlying_type/requirements/typedefs-3.cc: New
4427         test.
4428
4429         PR libstdc++/89446
4430         * include/bits/char_traits.h (__constant_char_array): Check index is
4431         in range before dereferencing.
4432         (char_traits<char>::compare, char_traits<char>::find)
4433         (char_traits<char8_t>::compare, char_traits<char8_t>::find): Return
4434         immediately if n is zero.
4435         (char_traits<wchar_t>::compare, char_traits<wchar_t>::find): Likewise.
4436         Remove workarounds for PR 67026.
4437         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
4438         New test.
4439         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
4440         New test.
4441
4442 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
4443
4444         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Adjust.
4445         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
4446
4447 2019-02-22  Jakub Jelinek  <jakub@redhat.com>
4448
4449         PR libstdc++/89402
4450         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Change return
4451         type to std::size_t and argument to type to long double.
4452
4453 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
4454
4455         * configure.host (abi_baseline_pair): Adjust for SPARC64/Linux.
4456         * config/abi/post/sparc64-linux-gnu: New directory.
4457         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: New file.
4458         * config/abi/post/sparc64-linux-gnu/32: New directory.
4459         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: New file.
4460
4461 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
4462
4463         * testsuite/29_atomics/headers/atomic/types_std_c++20.cc: New test.
4464         * testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc: New
4465         test.
4466
4467 2019-02-22  Tom Honermann  <tom@honermann.net>
4468
4469         * python/libstdcxx/v6/printers.py (register_type_printers): Add type
4470         printers for u8string and u8string_view.
4471
4472 2019-02-22  Tom Honermann  <tom@honermann.net>
4473
4474         * testsuite/18_support/byte/ops.cc: Validate
4475         std::to_integer<char8_t>, std::to_integer<char16_t>, and
4476         std::to_integer<char32_t>.
4477         * testsuite/18_support/numeric_limits/dr559.cc: Validate
4478         std::numeric_limits<char8_t>.
4479         * testsuite/18_support/numeric_limits/lowest.cc: Validate
4480         std::numeric_limits<char8_t>::lowest().
4481         * testsuite/18_support/numeric_limits/max_digits10.cc: Validate
4482         std::numeric_limits<char8_t>::max_digits10.
4483         * testsuite/18_support/type_info/fundamental.cc: Validate
4484         typeinfo for char8_t.
4485         * testsuite/20_util/from_chars/1_c++20_neg.cc: New test, validating
4486         std::from_chars with char8_t.
4487         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
4488         Validate explicit instantiation of std::hash<char8_t>.
4489         * testsuite/20_util/is_integral/value.cc: Validate
4490         std::is_integral<char8_t>.
4491         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
4492         Validate std::make_signed<char8_t>.
4493         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
4494         Validate u8string construction from char8_t sources.
4495         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc: Validate
4496         std::pmr::u8string.
4497         * testsuite/21_strings/basic_string_view/operations/compare/
4498         char/70483.cc: Validate substr operations on u8string_view.
4499         * testsuite/21_strings/basic_string_view/typedefs.cc: Validate that
4500         the u8string_view typedef is defined.
4501         * testsuite/21_strings/char_traits/requirements/
4502         constexpr_functions.cc: Validate char_traits<char8_t> constexpr
4503         member functions.
4504         * testsuite/21_strings/char_traits/requirements/
4505         constexpr_functions_c++17.cc: Validate char_traits<char8_t> C++17
4506         constexpr member functions.
4507         * testsuite/21_strings/headers/string/types_std_c++0x.cc: Validate
4508         that the u8string typedef is defined.
4509         * testsuite/22_locale/locale/cons/unicode.cc: Validate the presence
4510         of the std::codecvt<char16_t, char8_t, std::mbstate_t> and
4511         std::codecvt<char32_t, char8_t, std::mbstate_t> facets.
4512         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Update line
4513         numbers.
4514         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
4515         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
4516         Likewise.
4517         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
4518         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
4519         Validate std::atomic<char8_t>::is_always_lock_free
4520         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
4521         Update line numbers.
4522         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
4523         Likewise.
4524         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
4525         Likewise.
4526         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
4527         Validate std::experimental::pmr::u8string.
4528         * testsuite/experimental/string_view/typedefs.cc: Validate that the
4529         u8string_view typedef is defined.
4530         * testsuite/util/testsuite_common_types.h: Add char8_t, char16_t and
4531         char32_t to the typelists.
4532
4533 2019-02-22  Tom Honermann  <tom@honermann.net>
4534
4535         * include/ext/typelist.h: Constrain a partial specialization of
4536         typelist::detail::append_ to only match chain<T1,T2>.
4537
4538 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
4539
4540         PR libstdc++/89416
4541         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Replace
4542         class template with class. Replace move and copy member types with
4543         member alias templates, so they are only instantiated when needed.
4544         (__is_copy_insertable, __is_move_insertable): Adjust base class.
4545         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: Enable
4546         test for C++11/14/17 as well.
4547         * testsuite/23_containers/vector/modifiers/push_back/89416.cc: New
4548         test.
4549
4550 2019-02-20  Jakub Jelinek  <jakub@redhat.com>
4551
4552         PR libstdc++/89402
4553         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Add
4554         _GLIBCXX_PURE to the alias declaration.
4555
4556 2019-02-19  Jonathan Wakely  <jwakely@redhat.com>
4557
4558         * testsuite/21_strings/basic_string/literals/types.cc
4559         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string type for u8 literal.
4560         * testsuite/21_strings/basic_string/literals/values.cc
4561         [_GLIBCXX_USE_CHAR8_T]: Likewise.
4562         * testsuite/22_locale/codecvt/char16_t.cc: Adjust for u8 literals
4563         potentially having different type.
4564         * testsuite/22_locale/codecvt/char32_t.cc: Likewise.
4565         * testsuite/22_locale/codecvt/codecvt_utf8/79980.cc: Cast u8 literal
4566         to char.
4567         * testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: Likewise.
4568         * testsuite/22_locale/codecvt/utf8.cc: Likewise.
4569         * testsuite/22_locale/conversions/string/2.cc: Remove u8 prefix from
4570         string literals only using basic character set.
4571         * testsuite/22_locale/conversions/string/3.cc: Likewise. Cast other
4572         u8 literals to char.
4573         * testsuite/29_atomics/headers/atomic/macros.cc [_GLIBCXX_USE_CHAR8_T]:
4574         Test ATOMIC_CHAR8_T_LOCK_FREE.
4575         Add missing #error to ATOMIC_CHAR16_T_LOCK_FREE test.
4576         * testsuite/29_atomics/headers/atomic/types_std_c++0x.cc
4577         [_GLIBCXX_USE_CHAR8_T]: Check for std::atomic_char8_t.
4578         * testsuite/experimental/string_view/literals/types.cc
4579         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string_view type for u8
4580         literal.
4581         * testsuite/experimental/string_view/literals/values.cc
4582         [_GLIBCXX_USE_CHAR8_T]: Likewise.
4583
4584 2019-02-19  Tom Honermann  <tom@honermann.net>
4585
4586         * testsuite/18_support/numeric_limits/char8_t.cc: New test cloned
4587         from char16_32_t.cc; validates numeric_limits<char8_t>.
4588         * testsuite/21_strings/basic_string/literals/types-char8_t.cc: New
4589         test cloned from types.cc; validates operator""s for char8_t
4590         returns u8string.
4591         * testsuite/21_strings/basic_string/literals/values-char8_t.cc: New
4592         test cloned from values.cc; validates construction and comparison
4593         of u8string values.
4594         * testsuite/21_strings/basic_string/requirements/
4595         /explicit_instantiation/char8_t/1.cc: New test cloned from
4596         char16_t/1.cc; validates explicit instantiation of
4597         basic_string<char8_t>.
4598         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
4599         New test cloned from types.cc; validates operator""sv for char8_t
4600         returns u8string_view.
4601         * testsuite/21_strings/basic_string_view/literals/
4602         values-char8_t.cc: New test cloned from values.cc; validates
4603         construction and comparison of u8string_view values.
4604         * testsuite/21_strings/basic_string_view/requirements/
4605         explicit_instantiation/char8_t/1.cc: New test cloned from
4606         char16_t/1.cc; validates explicit instantiation of
4607         basic_string_view<char8_t>.
4608         * testsuite/21_strings/char_traits/requirements/char8_t/65049.cc:
4609         New test cloned from char16_t/65049.cc; validates that
4610         char_traits<char8_t> is not vulnerable to the concerns in PR65049.
4611         * testsuite/21_strings/char_traits/requirements/char8_t/
4612         typedefs.cc: New test cloned from char16_t/typedefs.cc; validates
4613         that char_traits<char8_t> member typedefs are present and correct.
4614         * testsuite/21_strings/char_traits/requirements/
4615         explicit_instantiation/char8_t/1.cc: New test cloned from
4616         char16_t/1.cc; validates explicit instantiation of
4617         char_traits<char8_t>.
4618         * testsuite/22_locale/codecvt/char16_t-char8_t.cc: New test cloned
4619         from char16_t.cc: validates
4620         codecvt<char16_t, char8_t, mbstate_t>.
4621         * testsuite/22_locale/codecvt/char32_t-char8_t.cc: New test cloned
4622         from char32_t.cc: validates
4623         codecvt<char32_t, char8_t, mbstate_t>.
4624         * testsuite/22_locale/codecvt/utf8-char8_t.cc: New test cloned from
4625         utf8.cc; validates codecvt<char16_t, char8_t, std::mbstate_t> and
4626         codecvt<char32_t, char8_t, std::mbstate_t>.
4627         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: New
4628         test cloned from string.cc; validates filesystem::path construction
4629         from char8_t input.
4630         * testsuite/experimental/feat-char8_t.cc: New test; validates that
4631         the __cpp_lib_char8_t feature test macro is defined with the
4632         correct value.
4633         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
4634         New test cloned from string.cc; validates filesystem::path
4635         construction from char8_t input.
4636         * testsuite/experimental/string_view/literals/types-char8_t.cc: New
4637         test cloned from types.cc; validates operator""sv for char8_t
4638         returns u8string_view.
4639         * testsuite/experimental/string_view/literals/values-char8_t.cc:
4640         New test cloned from values.cc; validates construction and
4641         comparison of u8string_view values.
4642         * testsuite/experimental/string_view/requirements/
4643         explicit_instantiation/char8_t/1.cc: New test cloned from
4644         char16_t/1.cc; validates explicit instantiation of
4645         basic_string_view<char8_t>.
4646         * testsuite/ext/char8_t/atomic-1.cc: New test; validates that
4647         ATOMIC_CHAR8_T_LOCK_FREE is not defined if char8_t support is not
4648         enabled.
4649
4650 2019-02-19  Tom Honermann  <tom@honermann.net>
4651
4652         P0482R5 char8_t: Standard library support
4653         * config/abi/pre/gnu-versioned-namespace.ver (CXXABI_2.0): Add
4654         typeinfo symbols for char8_t.
4655         * config/abi/pre/gnu.ver: Add CXXABI_1.3.12.
4656         (GLIBCXX_3.4.26): Add symbols for specializations of
4657         numeric_limits and codecvt that involve char8_t.
4658         (CXXABI_1.3.12): Add typeinfo symbols for char8_t.
4659         * include/bits/atomic_base.h: Add atomic_char8_t.
4660         * include/bits/basic_string.h: Add std::hash<u8string> and
4661         operator""s(const char8_t*, size_t).
4662         * include/bits/c++config: Define _GLIBCXX_USE_CHAR8_T and
4663         __cpp_lib_char8_t.
4664         * include/bits/char_traits.h: Add char_traits<char8_t>.
4665         * include/bits/codecvt.h: Add
4666         codecvt<char16_t, char8_t, mbstate_t>,
4667         codecvt<char32_t, char8_t, mbstate_t>,
4668         codecvt_byname<char16_t, char8_t, mbstate_t>, and
4669         codecvt_byname<char32_t, char8_t, mbstate_t>.
4670         * include/bits/cpp_type_traits.h: Add __is_integer<char8_t> to
4671         recognize char8_t as an integral type.
4672         * include/bits/fs_path.h: (path::__is_encoded_char): Recognize
4673         char8_t.
4674         (path::u8string): Return std::u8string when char8_t support is
4675         enabled.
4676         (path::generic_u8string): Likewise.
4677         (path::_S_convert): Handle conversion from char8_t input.
4678         (path::_S_str_convert): Likewise.
4679         * include/bits/functional_hash.h: Add hash<char8_t>.
4680         * include/bits/locale_conv.h (__str_codecvt_out): Add overloads for
4681         char8_t.
4682         * include/bits/locale_facets.h (_GLIBCXX_NUM_UNICODE_FACETS): Bump
4683         for new char8_t specializations.
4684         * include/bits/localefwd.h: Add missing declarations of
4685         codecvt<char16_t, char, mbstate_t> and
4686         codecvt<char32_t, char, mbstate_t>.  Add char8_t declarations
4687         codecvt<char16_t, char8_t, mbstate_t> and
4688         codecvt<char32_t, char8_t, mbstate_t>.
4689         * include/bits/postypes.h: Add u8streampos
4690         * include/bits/stringfwd.h: Add declarations of
4691         char_traits<char8_t> and u8string.
4692         * include/c_global/cstddef: Add __byte_operand<char8_t>.
4693         * include/experimental/bits/fs_path.h (path::__is_encoded_char):
4694         Recognize char8_t.
4695         (path::u8string): Return std::u8string when char8_t support is
4696         enabled.
4697         (path::generic_u8string): Likewise.
4698         (path::_S_convert): Handle conversion from char8_t input.
4699         (path::_S_str_convert): Likewise.
4700         * include/experimental/string: Add u8string.
4701         * include/experimental/string_view: Add u8string_view,
4702         hash<experimental::u8string_view>, and
4703         operator""sv(const char8_t*, size_t).
4704         * include/std/atomic: Add atomic<char8_t> and atomic_char8_t.
4705         * include/std/charconv (__is_int_to_chars_type): Recognize char8_t
4706         as a character type.
4707         * include/std/limits: Add numeric_limits<char8_t>.
4708         * include/std/string_view: Add u8string_view,
4709         hash<experimental::u8string_view>, and
4710         operator""sv(const char8_t*, size_t).
4711         * include/std/type_traits: Add __is_integral_helper<char8_t>,
4712         __make_unsigned<char8_t>, and __make_signed<char8_t>.
4713         * libsupc++/atomic_lockfree_defines.h: Define
4714         ATOMIC_CHAR8_T_LOCK_FREE.
4715         * src/c++11/Makefile.am: Compile with -fchar8_t when compiling
4716         codecvt.cc and limits.cc so that char8_t specializations of
4717         numeric_limits and codecvt and emitted.
4718         * src/c++11/Makefile.in: Likewise.
4719         * src/c++11/codecvt.cc: Define members of
4720         codecvt<char16_t, char8_t, mbstate_t>,
4721         codecvt<char32_t, char8_t, mbstate_t>,
4722         codecvt_byname<char16_t, char8_t, mbstate_t>, and
4723         codecvt_byname<char32_t, char8_t, mbstate_t>.
4724         * src/c++11/limits.cc: Define members of
4725         numeric_limits<char8_t>.
4726         * src/c++98/Makefile.am: Compile with -fchar8_t when compiling
4727         locale_init.cc and localename.cc.
4728         * src/c++98/Makefile.in: Likewise.
4729         * src/c++98/locale_init.cc: Add initialization for the
4730         codecvt<char16_t, char8_t, mbstate_t> and
4731         codecvt<char32_t, char8_t, mbstate_t> facets.
4732         * src/c++98/localename.cc: Likewise.
4733         * testsuite/util/testsuite_abi.cc: Validate ABI bump.
4734
4735 2019-02-18  Wilco Dijkstra  <wdijkstr@arm.com>
4736
4737         * 27_io/filesystem/operations/all.cc: Add dg-require-filesystem-ts.
4738         * 27_io/filesystem/operations/resize_file.cc: Likewise.
4739         * 27_io/filesystem/path/generation/normal2.cc: Likewise.
4740
4741 2019-02-14  Jonathan Wakely  <jwakely@redhat.com>
4742
4743         * doc/xml/manual/status_cxx2020.xml: Update P0887R1 status.
4744         * doc/html/*: Regenerate.
4745
4746         * doc/xml/manual/status_cxx2017.xml: Add P0063R3 to status table.
4747         * doc/html/*: Regenerate.
4748
4749         * doc/xml/manual/intro.xml: Document LWG 2586 status.
4750         * include/bits/uses_allocator.h (__uses_alloc): Use const lvalue
4751         allocator type in is_constructible checks.
4752         * testsuite/20_util/scoped_allocator/69293_neg.cc: Adjust dg-error.
4753         * testsuite/20_util/scoped_allocator/dr2586.cc: New test.
4754         * testsuite/20_util/tuple/cons/allocators.cc: Add test using
4755         problematic type from LWG 2586 discussion.
4756         * testsuite/20_util/uses_allocator/69293_neg.cc: Adjust dg-error.
4757         * testsuite/20_util/uses_allocator/cons_neg.cc: Likewise.
4758
4759         * configure.ac: Check for C11 timespec_get function.
4760         * crossconfig.m4 (freebsd, linux, gnu, cygwin, solaris, netbsd)
4761         (openbsd): Likewise
4762         * config.h.in: Regenerate.
4763         * configure: Regenerate.
4764         * include/c_global/ctime (timespec, timespec_get): Add to namespace
4765         std for C++17 and up.
4766
4767         * doc/xml/manual/intro.xml: Document LWG 2537 status.
4768         * include/bits/stl_queue.h
4769         (priority_queue(const Compare&, const Container&, const Alloc&))
4770         (priority_queue(const Compare&, Container&&, const Alloc&)): Call
4771         make_heap.
4772         * testsuite/23_containers/priority_queue/dr2537.cc: New test.
4773
4774         * doc/xml/manual/intro.xml: Document LWG 2566 status.
4775         * include/bits/stl_queue.h (queue, priority_queue): Add static
4776         assertions to enforce LWG 2566 requirement on value_type.
4777         * include/bits/stl_stack.h (stack): Likewise.
4778
4779         PR middle-end/89303
4780         * testsuite/20_util/enable_shared_from_this/89303.cc: New test.
4781
4782         * doc/xml/manual/intro.xml: Document LWG 2735 status.
4783         * include/bits/std_abs.h: Add comment about LWG 2735.
4784         * testsuite/26_numerics/headers/cstdlib/dr2735.cc: New test.
4785
4786 2019-02-13  Jonathan Wakely  <jwakely@redhat.com>
4787
4788         PR libstdc++/89345
4789         * include/std/version [__cpp_impl_destroying_delete]
4790         (__cpp_lib_destroying_delete): Only define for C++2a and later.
4791         * libsupc++/new [__cpp_impl_destroying_delete]
4792         (__cpp_lib_destroying_delete): Likewise.
4793         (destroying_delete_t, destroying_delete): Likewise, but define even
4794         when __cpp_impl_destroying_delete is not defined.
4795         * testsuite/18_support/destroying_delete.cc: New test.
4796
4797 2019-02-11  Jonathan Wakely  <jwakely@redhat.com>
4798
4799         PR libstdc++/89023
4800         * testsuite/17_intro/headers/c++2011/parallel_mode.cc: New test.
4801         * testsuite/17_intro/headers/c++2014/parallel_mode.cc: New test.
4802         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: New test.
4803         * testsuite/28_regex/headers/regex/parallel_mode.cc: Remove.
4804
4805 2019-02-09  Jonathan Wakely  <jwakely@redhat.com>
4806
4807         PR libstdc++/71044
4808         * include/bits/fs_path.h (path::has_root_name)
4809         (path::has_root_directory, path::has_root_path)
4810         (path::has_relative_path, path::has_parent_path)
4811         (path::has_filename, path::has_stem, path::has_extension)
4812         (path::is_absolute, path::is_relative, path::_M_find_extension): Add
4813         noexcept.
4814         * src/c++17/fs_path.cc (path::has_root_name)
4815         (path::has_root_directory, path::has_root_path)
4816         (path::has_relative_path, path::has_parent_path)
4817         (path::has_filename, path::_M_find_extension): Add noexcept.
4818
4819 2019-02-06  Jonathan Wakely  <jwakely@redhat.com>
4820
4821         PR libstdc++/89102 (partial)
4822         * include/std/type_traits (common_type<>): Define.
4823         (common_type<T>): Derive from common_type<T, T>.
4824         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
4825         Test zero-length template argument list.
4826         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
4827         Test additional single argument cases.
4828         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
4829         Adjust expected error.
4830
4831 2019-02-05  Jonathan Wakely  <jwakely@redhat.com>
4832
4833         PR libstdc++/89128
4834         * include/bits/stl_queue.h (queue, priority_queue): Add deduction
4835         guides.
4836         * include/bits/stl_stack.h (stack): Likewise.
4837         * testsuite/23_containers/priority_queue/deduction.cc: New test.
4838         * testsuite/23_containers/queue/deduction.cc: New test.
4839         * testsuite/23_containers/stack/deduction.cc: New test.
4840
4841         PR libstdc++/89194
4842         * include/std/type_traits (__is_convertible_helper)
4843         (__is_convertible_helper<_From, _To, false>): Revert changes to
4844         support is_nothrow_convertible.
4845         (__is_nt_convertible_helper): New helper.
4846         (is_nothrow_convertible): Use __is_nt_convertible_helper.
4847
4848         * testsuite/23_containers/vector/modifiers/push_back/49836.cc: Restore
4849         use of CopyConsOnlyType, but also test DelAnyAssign for completeness.
4850
4851         PR libstdc++/89130
4852         * include/bits/alloc_traits.h (__is_copy_insertable_impl): Rename to
4853         __is_alloc_insertable_impl. Replace single type member with two
4854         members, one for each of copy and move insertable.
4855         (__is_move_insertable): New trait for internal use.
4856         * include/bits/stl_vector.h (vector::_S_nothrow_relocate(true_type))
4857         (vector::_S_nothrow_relocate(true_type)): New functions to
4858         conditionally check if __relocate_a can throw.
4859         (vector::_S_use_relocate()): Dispatch to _S_nothrow_relocate based
4860         on __is_move_insertable.
4861         (vector::_S_do_relocate): New overloaded functions to conditionally
4862         call __relocate_a.
4863         (vector::_S_relocate): New function that dispatches to _S_do_relocate
4864         based on _S_use_relocate.
4865         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
4866         (vector::_M_default_append): Call _S_relocate instead of __relocate_a.
4867         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: New.
4868
4869         PR libstdc++/89090
4870         * include/bits/stl_uninitialized.h (__relocate_a_1): Make unused
4871         parameter unnamed. Add message to static assertion.
4872         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
4873         (vector::_M_default_append): Use _GLIBCXX17_CONSTEXPR for if constexpr
4874         in C++11 code.
4875
4876 2019-02-05  Marc Glisse  <marc.glisse@inria.fr>
4877
4878         PR libstdc++/87106
4879         * include/bits/stl_uninitialized.h (__is_trivially_relocatable):
4880         Rename...
4881         (__is_bitwise_relocatable): ... to this.
4882         (__relocate_a_1): Adapt.
4883         * include/bits/stl_deque.h (__is_trivially_relocatable): Rename...
4884         (__is_bitwise_relocatable): ... to this.
4885
4886 2019-01-30  Jonathan Wakely  <jwakely@redhat.com>
4887
4888         PR libstdc++/89117
4889         * src/c++17/fs_path.cc (path::replace_extension): Erase extension from
4890         final component as well as from _M_pathname. Append the dot using
4891         operator+= instead of only to _M_pathname.
4892         (path::_M_find_extension): Reformat slightly.
4893         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
4894         Add more test cases.
4895
4896 2019-01-30  Ulrich Drepper  <drepper@redhat.com>
4897
4898         * doc/xml/manual/status_cxx2020.xml: Update P0600 entry.
4899
4900 2019-01-29  Jonathan Wakely  <jwakely@redhat.com>
4901
4902         * testsuite/26_numerics/headers/complex/synopsis.cc: Remove incorrect
4903         constexpr specifiers from arg and proj.
4904
4905         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
4906         __shared_ptr instantiations used by gcc4-compatible ABI.
4907
4908         * include/experimental/forward_list (experimental::erase): Qualify
4909         call to erase_if.
4910         * include/experimental/list (experimental::erase): Likewise.
4911         * include/std/forward_list (std::erase): Likewise.
4912         * include/std/list (std::erase): Likewise.
4913
4914         * testsuite/20_util/reference_wrapper/result_type.cc: Disable for
4915         C++2a.
4916         * testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
4917         * testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
4918         * testsuite/20_util/reference_wrapper/typedefs.cc: Likewise.
4919         * testsuite/30_threads/async/54297.cc: Suppress nodiscard warning.
4920         * testsuite/ext/array_allocator/26875.cc: Likewise.
4921         * testsuite/ext/pool_allocator/allocate_chunk.cc: Likewise.
4922         * testsuite/util/replacement_memory_operators.h: Likewise.
4923         * testsuite/util/testsuite_allocator.h: Likewise.
4924
4925         * include/std/memory_resource (__pool_resource::_M_unpooled): Use
4926         normal mode vector, even for debug mode.
4927         * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
4928         Define alias template for normal mode vector.
4929
4930 2019-01-28  Jonathan Wakely  <jwakely@redhat.com>
4931
4932         PR libstdc++/68737
4933         * config/locale/generic/c_locale.h (__convert_from_v)
4934         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
4935         * config/os/hpux/os_defines.h: Define _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
4936         * include/bits/locale_facets.tcc (num_put::_M_insert_float)
4937         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
4938
4939 2019-01-24  Jonathan Wakely  <jwakely@redhat.com>
4940
4941         PR libstdc++/88840
4942         * include/bits/stl_vector.h (vector::__use_relocate): Replace static
4943         data member with static member function _S_use_relocate().
4944         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
4945         (vector::_M_default_append): Use _S_use_relocate() instead of
4946         __use_relocate.
4947
4948         * testsuite/27_io/filesystem/path/compare/strings.cc: Only compare
4949         sign of results.
4950
4951 2019-01-22  Jonathan Wakely  <jwakely@redhat.com>
4952
4953         PR libstdc++/88740
4954         * testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
4955         write to stderr instead of using printf.
4956
4957 2019-01-21  Jakub Jelinek  <jakub@redhat.com>
4958
4959         PR libstdc++/86590
4960         * include/bits/char_traits.h (__constant_string_p,
4961         __constant_char_array_p): Use __builtin_is_constant_evaluated if
4962         available.
4963
4964 2019-01-20  Ulrich Drepper  <drepper@redhat.com>
4965
4966         Implement C++20 P0600r1.
4967         * include/backward/hash_map: Add nodiscard attribute to empty.
4968         * include/backward/hash_set: Likewise.
4969         * backward/hashtable.h: Likewise.
4970         * include/bits/basic_string.h: Likewise.
4971         * include/bits/forward_list.h: Likewise.
4972         * include/bits/hashtable.h: Likewise.
4973         * include/bits/regex.h: Likewise.
4974         * include/bits/stl_deque.h: Likewise.
4975         * include/bits/stl_list.h: Likewise.
4976         * include/bits/stl_map.h: Likewise.
4977         * include/bits/stl_multimap.h: Likewise.
4978         * include/bits/stl_multiset.h: Likewise.
4979         * include/bits/stl_queue.h: Likewise.
4980         * include/bits/stl_set.h: Likewise.
4981         * include/bits/stl_stack.h: Likewise.
4982         * include/bits/stl_tree.h: Likewise.
4983         * include/bits/stl_vector.h: Likewise.
4984         * include/bits/unordered_map.h: Likewise.
4985         * include/bits/unordered_set.h: Likewise.
4986         * include/debug/array: Likewise.
4987         * include/experimental/any: Likewise.
4988         * include/experimental/bits/fs_path.h: Likewise.
4989         * include/experimental/internet: Likewise.
4990         * include/experimental/string_view: Likewise.
4991         * include/ext/pb_ds/detail/bin_search_tree_/info_fn_imps.hpp:
4992         Likewise.
4993         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp:
4994         Likewise.
4995         * include/ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp:
4996         Likewise.
4997         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:
4998         Likewise.
4999         * include/ext/pb_ds/detail/cc_hash_table_map_/info_fn_imps.hpp:
5000         Likewise.
5001         * include/ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp:
5002         Likewise.
5003         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp:
5004         Likewise.
5005         * include/ext/pb_ds/detail/gp_hash_table_map_/info_fn_imps.hpp:
5006         Likewise.
5007         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
5008         info_fn_imps.hpp: Likewise.
5009         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
5010         left_child_next_sibling_heap_.hpp: Likewise.
5011         * include/ext/pb_ds/detail/list_update_map_/info_fn_imps.hpp:
5012         Likewise.
5013         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp:
5014         Likewise.
5015         * include/ext/pb_ds/detail/ov_tree_map_/info_fn_imps.hpp:
5016         Likewise.
5017         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hp:
5018         Likewise.
5019         * include/ext/pb_ds/detail/pat_trie_/info_fn_imps.hpp:
5020         Likewise.
5021         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:
5022         Likewise.
5023         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp:
5024         Likewise.
5025         * include/ext/pb_ds/detail/tree_trace_base.hpp: Likewise.
5026         * include/ext/pb_ds/trie_policy.hpp: Likewise.
5027         * include/ext/rope: Likewise.
5028         * include/ext/slist: Likewise.
5029         * include/ext/vstring.h: Likewise.
5030         * include/profile/array: Likewise.
5031         * include/std/array: Likewise.
5032         * include/tr1/array: Likewise.
5033         * include/tr1/hashtable.h: Likewise.
5034         * include/tr1/regex: Likewise.
5035         * include/tr2/dynamic_bitset: Likewise.
5036         * include/bits/alloc_traits.h: Add nodiscard attribute to
5037         allocate.
5038         * include/experimental/memory_resource: Likewise.
5039         * include/ext/alloc_traits.h: Likewise.
5040         * include/ext/array_allocator.h: Likewise.
5041         * include/ext/bitmap_allocator.h: Likewise.
5042         * include/ext/debug_allocator.h: Likewise.
5043         * include/ext/extptr_allocator.h: Likewise.
5044         * include/ext/mt_allocator.h: Likewise.
5045         * include/ext/new_allocator.h: Likewise.
5046         * include/ext/pool_allocator.h: Likewise.
5047         * include/ext/throw_allocator.h: Likewise.
5048         * include/std/scoped_allocator: Likewise.
5049         * libsupc++/eh_alloc.cc: Likewise.
5050         * include/std/future: Add nodiscard attribute to async.
5051         * libsupc++/new: Add nodiscard attribute to new.
5052
5053 2019-01-18  Jonathan Wakely  <jwakely@redhat.com>
5054
5055         PR libstdc++/87514
5056         PR libstdc++/87520
5057         PR libstdc++/88782
5058         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export new symbol.
5059         * include/bits/shared_ptr.h
5060         (shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...))
5061         (allocate_shared): Change to use new tag type.
5062         * include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_eq):
5063         Declare new member function.
5064         (_Sp_alloc_shared_tag): Define new type.
5065         (_Sp_counted_ptr_inplace): Declare __shared_count<_Lp> as a friend.
5066         (_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Use
5067         _Sp_make_shared_tag::_S_eq to check type_info.
5068         (__shared_count(Ptr, Deleter),__shared_count(Ptr, Deleter, Alloc)):
5069         Constrain to prevent being called with _Sp_alloc_shared_tag.
5070         (__shared_count(_Sp_make_shared_tag, const _Alloc&, Args&&...)):
5071         Replace constructor with ...
5072         (__shared_count(Tp*&, _Sp_alloc_shared_tag<_Alloc>, Args&&...)): Use
5073         reference parameter so address of the new object can be returned to
5074         the caller. Obtain the allocator from the tag type.
5075         (__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Replace
5076         constructor with ...
5077         (__shared_ptr(_Sp_alloc_shared_tag<Alloc>, Args&&...)): Pass _M_ptr
5078         to the __shared_count constructor.
5079         (__allocate_shared): Change to use new tag type.
5080         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq): Define.
5081
5082 2019-01-17  Jonathan Wakely  <jwakely@redhat.com>
5083
5084         * src/c++17/fs_ops.cc
5085         (equivalent(const path&, const path&, error_code&))
5086         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use GetFileInformationByHandle to
5087         compare files instead of relying on incomplete info returned by stat.
5088
5089         PR libstdc++/88884
5090         * src/c++17/fs_ops.cc (absolute(const path&, error_code&)): Do nothing
5091         if the path is already absolute.
5092         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize root-directory.
5093         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Pass error_code to current_path.
5094
5095         PR libstdc++/88881
5096         * src/c++17/fs_ops.cc (canonical(const path&, error_code&))
5097         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize path, to match behaviour
5098         of filesystem::exists.
5099         (create_directories(const path&, error_code&)): Add assertions.
5100         (status(const path&, error_code&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
5101         Add workaround for bug in _wstat for paths with trailing slash.
5102         * testsuite/27_io/filesystem/operations/create_directories.cc: Adjust
5103         for expected behaviour on mingw.
5104         * testsuite/experimental/filesystem/operations/create_directories.cc:
5105         Likewise.
5106         * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Use
5107         "TMP" instead of "TMPDIR" and clean environment before each test. Do
5108         not test permissions on mingw targets.
5109
5110 2019-01-16  Jonathan Wakely  <jwakely@redhat.com>
5111
5112         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
5113         constructors and open members taking wide strings. Fix patterns for
5114         filesystem::path members to match wstring_view parameters. Add
5115         exports for shared_ptr members used by directory iterators.
5116         * src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
5117         error code parameter if the file doesn't exist.
5118         * src/filesystem/ops.cc (remove(const path&, error_code&)):
5119         Likewise.
5120         * testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
5121         values for mingw targets, where "/" is not an absolute path. Do not
5122         test symlinks on mingw targets.
5123         * testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
5124         * testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
5125         on mingw targets.
5126         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
5127         * testsuite/27_io/filesystem/operations/create_directories.cc: Check
5128         that each component of the path is created.
5129         * testsuite/experimental/filesystem/operations/create_directories.cc:
5130         Likewise.
5131         * testsuite/27_io/filesystem/operations/exists.cc: Do not test
5132         permissions on mingw targets.
5133         * testsuite/experimental/filesystem/operations/exists.cc: Likewise.
5134         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
5135         * testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
5136         * testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
5137         mingw targets.
5138         * testsuite/experimental/filesystem/operations/permissions.cc:
5139         Likewise.
5140         * testsuite/27_io/filesystem/operations/remove.cc: Do not test
5141         symlinks or permissions on mingw targets.
5142         * testsuite/experimental/filesystem/operations/remove.cc: Likewise.
5143         * testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
5144         symlinks on mingw targets.
5145         * testsuite/experimental/filesystem/operations/remove_all.cc:
5146         Likewise.
5147         * testsuite/27_io/filesystem/operations/status.cc: Do not test
5148         permissions on mingw targets.
5149         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
5150         test symlinks on mingw targets.
5151         * testsuite/experimental/filesystem/operations/space.cc: Fix test
5152         for mingw targets.
5153
5154 2019-02-14  Ulrich Drepper  <drepper@redhat.com>
5155
5156         PR libstdc++/88738
5157         Warn about unused comparisons of shared_ptr/unique_ptr
5158         * include/bits/c++config [_GLIBCXX_NODISCARD]: Define.
5159         * include/bits/shared_ptr.h: Use it for operator ==, !=,
5160         <, <=, >, >= for shared_ptr.
5161         * include/bits/unique_ptr.h: Likewise for unique_ptr.
5162
5163 2019-01-15  Jonathan Wakely  <jwakely@redhat.com>
5164
5165         * include/bits/shared_ptr_base.h (__cpp_lib_shared_ptr_arrays): Define
5166         as 201611L, because P0497R0 changes are supported.
5167         * include/std/version (__cpp_lib_shared_ptr_arrays): Likewise.
5168
5169         * include/bits/erase_if.h [__cplusplus > 201703L]
5170         (__cpp_lib_erase_if): Only define for C++2a.
5171         * include/std/iterator [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
5172         (__cpp_lib_null_iterators): Define.
5173         * include/std/version [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
5174         (__cpp_lib_null_iterators): Define.
5175         [__cpp_impl_destroying_delete] (__cpp_lib_destroying_delete): Define.
5176
5177         * doc/xml/manual/status_cxx2017.xml: Document P0032R3 and P0307R2
5178         status.
5179         * include/bits/stl_uninitialized.h (__cpp_lib_raw_memory_algorithms):
5180         Define.
5181         * include/std/any (__cpp_lib_any): Define as 201606L, because P0032R3
5182         changes are supported.
5183         * include/std/optional (__cpp_lib_optional): Likewise.
5184         * include/std/variant (__cpp_lib_variant): Likewise.
5185         * include/std/version [!__STRICT_ANSI__]
5186         (__cpp_lib_uncaught_exceptions): Define as long integer.
5187         [__cplusplus >= 201703L] (__cpp_lib_any)
5188         (__cpp_lib_raw_memory_algorithms, __cpp_lib_uncaught_exceptions)
5189         (__cpp_lib_variant): Define for C++17.
5190         [__cplusplus >= 201703L] (__cpp_lib_optional): Update value and define
5191         as long integer.
5192         * libsupc++/exception (__cpp_lib_uncaught_exceptions): Define as long
5193         integer.
5194
5195         * doc/xml/manual/status_cxx2020.xml: Update P1123R0 status.
5196
5197 2019-01-12  Jonathan Wakely  <jwakely@redhat.com>
5198
5199         PR libstdc++/88811
5200         PR libstdc++/83306
5201         * src/filesystem/path.cc: Fix typo. If first path is empty, show []
5202         before second path.
5203         * testsuite/experimental/filesystem/filesystem_error/cons.cc: New
5204         test.
5205
5206 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
5207
5208         * doc/xml/manual/intro.xml: Include new section.
5209         * doc/xml/manual/status_cxx2017.xml: Document more
5210         implementation-defined properties of the library.
5211         * doc/xml/manual/status_cxx2020.xml: Document C++2a status.
5212         * doc/html/*: Regenerate.
5213
5214         * include/bits/refwrap.h [__cplusplus > 201703L]
5215         (_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
5216         (_Reference_wrapper_base_memfun): Do not define for C++2a.
5217         (reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
5218         for C++2a.
5219         (reference_wrapper::operator()): Add static assertion.
5220         * testsuite/20_util/reference_wrapper/incomplete.cc: New test.
5221
5222         * include/std/chrono (duration_values::zero(), duration_values::min())
5223         (duration_values::max()): Add noexcept.
5224         (duration::zero(), duration::min(), duration::max()): Likewise.
5225         (time_point::zero(), time_point::min(), time_point::max()): Likewise.
5226         * testsuite/20_util/duration/requirements/noexcept.cc: New test.
5227         * testsuite/20_util/time_point/requirements/noexcept.cc: New test.
5228
5229         * include/std/version (__cpp_lib_erase_if): Move to C++20 group.
5230
5231 2019-01-11  Jakub Jelinek  <jakub@redhat.com>
5232
5233         * include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
5234         * include/std/version (__cpp_lib_is_constant_evaluated): Define.
5235
5236 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
5237
5238         PR libstdc++/88802
5239         * include/bits/functional_hash.h (hash<nullptr_t>): Define
5240         specialization for C++17 (P0513R0, LWG 2817).
5241         * testsuite/20_util/hash/nullptr.cc: New test.
5242
5243         PR libstdc++/88125
5244         * config/abi/pre/gnu.ver (GLIBCXX_3.4.6): Remove unused duplicate
5245         pattern for std::basic_stringbuf::str().
5246
5247         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
5248         basic_ostream::operator<< patterns.
5249
5250 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
5251
5252         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fix
5253         test failures on targets with 32-bit time_t.
5254
5255         * include/bits/erase_if.h: Define __cpp_lib_erase_if.
5256         * include/std/deque: Likewise.
5257         * include/std/forward_list: Likewise.
5258         * include/std/list: Likewise.
5259         * include/std/string: Likewise.
5260         * include/std/vector: Likewise.
5261         * include/std/version: Likewise.
5262         * testsuite/21_strings/basic_string/erasure.cc: Test macro.
5263         * testsuite/23_containers/deque/erasure.cc: Likewise.
5264         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
5265         * testsuite/23_containers/list/erasure.cc: Likewise.
5266         * testsuite/23_containers/map/erasure.cc: Likewise.
5267         * testsuite/23_containers/set/erasure.cc: Likewise.
5268         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
5269         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
5270         * testsuite/23_containers/vector/erasure.cc: Likewise.
5271
5272         * include/experimental/internet [AI_NUMERICSERV]
5273         (resolver_base::numeric_service): Define conditionally.
5274         * testsuite/experimental/net/internet/resolver/base.cc: Test it
5275         conditionally.
5276         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
5277         Likewise.
5278
5279 2019-01-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
5280             Jonathan Wakely  <jwakely@redhat.com>
5281
5282         Implement LWG 2221
5283         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten patterns.
5284         (GLIBCXX_3.4.26): Add new exports.
5285         * include/Makefile.am: Add ostream-inst.cc. Move string-inst.cc to
5286         correct list of sources.
5287         * include/Makefile.in: Regenerate.
5288         * include/std/ostream (operator<<(nullptr_t)): New member function.
5289         * src/c++17/ostream-inst.cc: New file.
5290         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc: New
5291         test.
5292
5293 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
5294
5295         * testsuite/util/testsuite_fs.h (nonexistent_path): Include name
5296         of the source file containing the caller.
5297         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Remove
5298         directories created by test.
5299         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
5300         Likewise.
5301         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
5302         Likewise.
5303         * testsuite/experimental/filesystem/iterators/
5304         recursive_directory_iterator.cc: Likewise.
5305
5306 2019-01-10  Jakub Jelinek  <jakub@redhat.com>
5307
5308         PR tree-optimization/88775
5309         * include/bits/stl_function.h (greater<_Tp*>::operator(),
5310         less<_Tp*>::operator(), greater_equal<_Tp*>::operator(),
5311         less_equal<_Tp*>::operator()): Use __builtin_is_constant_evaluated
5312         instead of __builtin_constant_p if available.  Don't bother with
5313         the pointer comparison in C++11 and earlier.
5314
5315 2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>
5316
5317         PR other/16615
5318
5319         * include/ext/bitmap_allocator.h: Mechanically replace "can not"
5320         with "cannot".
5321
5322 2019-01-09  Jonathan Wakely  <jwakely@redhat.com>
5323
5324         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix expected output
5325         for filesystem::path. Give variables more distinctive names.
5326
5327         * include/std/optional (_Optional_payload_base::_M_copy_assign): New
5328         member function to perform non-trivial assignment.
5329         (_Optional_payload_base::_M_move_assign): Likewise.
5330         (_Optional_payload<T, true, false, true>::operator=)
5331         (_Optional_payload<T, true, true, false>::operator=)
5332         (_Optional_payload<T, true, false, false>::operator=): Call
5333         _M_copy_assign and/or _M_move_assign to do non-trivial assignments.
5334
5335         PR libstdc++/88204
5336         * testsuite/26_numerics/complex/operators/more_constexpr.cc: Do not
5337         test std::complex<long double> if long double format is IBM128.
5338         * testsuite/26_numerics/complex/requirements/more_constexpr.cc:
5339         Likewise.
5340
5341 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
5342
5343         * testsuite/libstdc++-prettyprinters/compat.cc: Test printer support
5344         for old std::unique_ptr layout.
5345         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix std::variant test
5346         to become valueless. Add filesystem::path tests.
5347
5348         PR libstdc++/87855
5349         * include/std/optional (_Optional_payload_base): New class template
5350         for common code hoisted from _Optional_payload specializations. Use
5351         a template for the union, to allow a partial specialization for
5352         types with non-trivial destructors. Add constructors for in-place
5353         initialization to the union.
5354         (_Optional_payload(bool, const _Optional_payload&)): Use _M_construct
5355         to perform non-trivial copy construction, instead of relying on
5356         non-standard copy elision in a delegating constructor.
5357         (_Optional_payload(bool, _Optional_payload&&)): Likewise for
5358         non-trivial move construction.
5359         (_Optional_payload): Derive from _Optional_payload_base and use it
5360         for everything except the non-trivial assignment operators, which are
5361         defined as needed.
5362         (_Optional_payload<false, C, M>): Derive from the specialization
5363         _Optional_payload<true, false, false> and add a destructor.
5364         (_Optional_base_impl::_M_destruct, _Optional_base_impl::_M_reset):
5365         Forward to corresponding members of _Optional_payload.
5366         (_Optional_base_impl::_M_is_engaged, _Optional_base_impl::_M_get):
5367         Hoist common members from _Optional_base.
5368         (_Optional_base): Make all members and base class public.
5369         (_Optional_base::_M_get, _Optional_base::_M_is_engaged): Move to
5370         _Optional_base_impl.
5371         * python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Add
5372         support for new std::optional layout.
5373         * testsuite/libstdc++-prettyprinters/compat.cc: New test.
5374
5375         PR libstdc++/88066
5376         * include/bits/locale_conv.h: Use <> for includes not "".
5377         * include/ext/random: Likewise.
5378         * include/ext/vstring.h: Likewise.
5379
5380 2019-01-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
5381
5382         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten existing patterns.
5383         (GLIBCXX_3.4.21): Likewise.
5384
5385 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
5386
5387         PR libstdc++/88749
5388         * src/filesystem/ops.cc (last_write_time): Fix preprocessor condition
5389         to match the one that controls whether utimbuf and utime are declared.
5390
5391 2019-01-07  Jonathan Wakely  <jwakely@redhat.com>
5392
5393         PR libstdc++/87787
5394         * include/bits/char_traits.h (char_traits::move): Do not pass null
5395         pointers to memmove.
5396         * include/bits/locale_facets.h
5397         (ctype<char>::widen(const char*, const char*, char*)): Do not
5398         pass null pointers to memcpy.
5399         (ctype<char>::narrow(const char*, const char*, char, char*)):
5400         Likewise.
5401         (ctype<char>::do_widen(const char*, const char*, char*)):
5402         Likewise.
5403         (ctype<char>::do_narrow(const char*, const char*, char, char*)):
5404         Likewise.
5405
5406         * doc/xml/manual/spine.xml: Update copyright years.
5407         * doc/xml/manual/status_cxx2017.xml: Adjust note about -lstdc++fs.
5408         * doc/xml/manual/using.xml: Remove requirement to link with -lstdc++fs
5409         for C++17 filesystem library.
5410         * doc/html/*: Regenerate.
5411
5412         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
5413         * config.h.in: Regenerate.
5414         * config/abi/pre/gnu.ver: Order patterns for filesystem operations
5415         alphabetically and add missing entries for copy_symlink,
5416         hard_link_count, rename, and resize_file.
5417         * configure: Regenerate.
5418         * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
5419         used unconditionally.
5420         * src/filesystem/ops-common.h (__gnu_posix::truncate)
5421         [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
5422         supports truncating to zero length.
5423         * testsuite/27_io/filesystem/operations/all.cc: New test.
5424         * testsuite/27_io/filesystem/operations/resize_file.cc: New test.
5425
5426 2019-01-06  Jonathan Wakely  <jwakely@redhat.com>
5427
5428         PR libstdc++/86756
5429         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and
5430         lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT.
5431         * config.h.in: Regenerate.
5432         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for
5433         remaining std::filesystem types and functions.
5434         * configure: Regenerate.
5435         * src/c++17/Makefile.am: Add C++17 filesystem sources.
5436         * src/c++17/Makefile.in: Regenerate.
5437         * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to
5438         here, and change name of included file.
5439         * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to
5440         here, and change name of included file.
5441         * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change
5442         path to dir-common.h.
5443         * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change
5444         path to ops-common.h. Disable -Wunused-parameter warnings.
5445         (internal_file_clock): Define unconditionally.
5446         [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not
5447         define.
5448         (do_copy_file, do_space): Move definitions to ops.common.h.
5449         (copy, file_size, hard_link_count, last_write_time, space): Only
5450         perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise
5451         report an error.
5452         (last_write_time, read_symlink): Remove unused attributes from
5453         parameters.
5454         * src/filesystem/Makefile.am: Remove C++17 filesystem sources.
5455         * src/filesystem/Makefile.in: Regenerate.
5456         * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc.
5457         * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc.
5458         * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc.
5459         * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc.
5460         * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define
5461         dummy types and functions instead of using #error.
5462         * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error.
5463         * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define
5464         in terms of stat.
5465         [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions.
5466         (do_copy_file, do_space): Move definitions here from std-ops.cc.
5467         * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space
5468         to account for new namespace.
5469         * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove
5470         -lstdc++fs from dg-options.
5471         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise.
5472         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
5473         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
5474         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
5475         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
5476         Likewise.
5477         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
5478         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
5479         Likewise.
5480         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
5481         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
5482         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
5483         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
5484         * testsuite/27_io/filesystem/operations/create_directories.cc:
5485         Likewise.
5486         * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise.
5487         * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise.
5488         * testsuite/27_io/filesystem/operations/current_path.cc: Likewise.
5489         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
5490         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
5491         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
5492         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
5493         * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise.
5494         * testsuite/27_io/filesystem/operations/permissions.cc: Likewise.
5495         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
5496         * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise.
5497         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
5498         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
5499         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
5500         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
5501         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
5502         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
5503         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
5504         Likewise.
5505         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise.
5506
5507
5508         PR libstdc++/86756
5509         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Make various patterns for
5510         typeinfo and vtables less greedy.
5511         (GLIBCXX_3.4.26): Export symbols for std::filesystem::path.
5512         * src/c++17/Makefile.am: Add fs_path.cc and cow-fs_path.cc.
5513         * src/c++17/Makefile.in: Regenerate.
5514         * src/c++17/cow-fs_path.cc: Move src/filesystem/cow-std-path.cc to
5515         here, and change name of included file.
5516         * src/c++17/fs_path.cc: Move src/filesystem/std-path.cc to here.
5517         * src/filesystem/Makefile.am: Remove std-path.cc and cow-std-path.cc
5518         from sources.
5519         * src/filesystem/Makefile.in: Regenerate.
5520         * src/filesystem/cow-std-path.cc: Move to src/c++17/cow-fs_path.cc.
5521         * src/filesystem/std-path.cc: Move to src/c++17/fs_path.cc.
5522         * testsuite/27_io/filesystem/path/append/path.cc: Remove -lstdc++fs
5523         from dg-options and remove dg-require-filesystem-ts.
5524         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
5525         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
5526         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
5527         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
5528         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
5529         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
5530         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
5531         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
5532         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
5533         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
5534         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
5535         * testsuite/27_io/filesystem/path/construct/default.cc: Likewise.
5536         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
5537         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
5538         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
5539         * testsuite/27_io/filesystem/path/construct/string_view.cc: Likewise.
5540         * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise.
5541         * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise.
5542         * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise.
5543         * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise.
5544         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
5545         Likewise.
5546         * testsuite/27_io/filesystem/path/decompose/root_name.cc: Likewise.
5547         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise.
5548         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
5549         * testsuite/27_io/filesystem/path/generation/normal.cc: Likewise.
5550         * testsuite/27_io/filesystem/path/generation/normal2.cc: Likewise.
5551         * testsuite/27_io/filesystem/path/generation/proximate.cc: Likewise.
5552         * testsuite/27_io/filesystem/path/generation/relative.cc: Likewise.
5553         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Likewise.
5554         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
5555         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
5556         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
5557         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
5558         Likewise.
5559         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
5560         Likewise.
5561         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
5562         Likewise.
5563         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
5564         Likewise.
5565         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
5566         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
5567         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
5568         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise.
5569         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
5570         * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise.
5571         * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise.
5572         * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise.
5573         * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise.
5574         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
5575         Likewise.
5576         * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise.
5577         * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise.
5578         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
5579         * testsuite/27_io/filesystem/path/query/is_absolute.cc: Likewise.
5580         * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.
5581
5582         PR libstdc++/87431
5583         * include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
5584         Check is_trivially_copyable instead of is_scalar.
5585         (variant::emplace<N, Args>(Args&&...)): If construction of the new
5586         contained value can throw and its type is trivially copyable then
5587         construct into a temporary variant and move from it, to provide the
5588         strong exception safety guarantee.
5589         (variant::emplace<N, U, Args>(initializer_list<U>, Args&&...)):
5590         Likewise.
5591         * testsuite/20_util/variant/87431.cc: New test.
5592         * testsuite/20_util/variant/run.cc: Adjust test so that throwing
5593         conversion causes valueless state.
5594
5595         PR libstdc++/88607
5596         * testsuite/17_intro/headers/c++1998/charset.cc: New test.
5597         * testsuite/17_intro/headers/c++2011/charset.cc: New test.
5598         * testsuite/17_intro/headers/c++2014/charset.cc: New test.
5599         * testsuite/17_intro/headers/c++2017/charset.cc: New test.
5600         * testsuite/17_intro/headers/c++2020/charset.cc: New test.
5601
5602 2019-01-05  Jonathan Wakely  <jwakely@redhat.com>
5603
5604         * include/bits/fs_fwd.h (__file_clock): Define new clock.
5605         (file_time_type): Redefine in terms of __file_clock.
5606         * src/filesystem/ops-common.h (file_time): Add FIXME comment about
5607         overflow.
5608         * src/filesystem/std-ops.cc (is_set(perm_options, perm_options)): Give
5609         internal linkage.
5610         (internal_file_lock): New helper type for accessing __file_clock.
5611         (do_copy_file): Use internal_file_lock to convert system time to
5612         file_time_type.
5613         (last_write_time(const path&, error_code&)): Likewise.
5614         (last_write_time(const path&, file_time_type, error_code&)): Likewise.
5615
5616 2019-01-04  Jonathan Wakely  <jwakely@redhat.com>
5617
5618         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make patterns less greedy
5619         for const member functions of std::basic_string.
5620         (GLIBCXX_3.4.26): Export member functions of std::basic_string added
5621         in C++17.
5622         * include/bits/basic_string.h (basic_string(__sv_wrapper, const A&)):
5623         Make non-standard constructor private.
5624         [!_GLIBCXX_USE_CXX11_ABI] (basic_string(__sv_wrapper, const A&)):
5625         Likewise.
5626         * include/bits/basic_string.tcc (std::string, std::wstring): Declare
5627         explicit instantiations for C++17 as well as earlier dialects.
5628         * src/c++17/Makefile.am: Add new source files.
5629         * src/c++17/Makefile.in: Regenerate.
5630         * src/c++17/cow-string-inst.cc: New file defining explicit
5631         instantiations for basic_string member functions added in C++17.
5632         * src/c++17/string-inst.cc: Likewise.
5633
5634         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export allocator-extended
5635         copy/move constructors for old std::basic_string.
5636         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
5637         (basic_string::reference, basic_string::const_reference): Define
5638         as plain references for C++11 and later.
5639         (basic_string::basic_string()): Put constructor body outside
5640         preprocessor conditional groups.
5641         (basic_string::basic_string(basic_string&&)): Move _Alloc_hider
5642         instead of copying it.
5643         (basic_string::basic_string(const basic_string&, const _Alloc&)):
5644         Define.
5645         (basic_string::basic_string(basic_string&&, const _Alloc&)):
5646         Define.
5647         * include/bits/fs_path.h [!_GLIBCXX_USE_CXX11_ABI]: Remove special
5648         cases for old basic_string.
5649         * testsuite/21_strings/basic_string/cons/char/8.cc: Test
5650         allocator-extended constructors unconditionally. Add extra members to
5651         allocator type when using old string ABI.
5652         * testsuite/21_strings/basic_string/allocator/71964.cc: Enable test
5653         for old string ABI.
5654         * testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.
5655
5656         * testsuite/23_containers/list/61347.cc: Avoid spurious failure when
5657         -fno-inline added to test flags.
5658
5659         * testsuite/21_strings/basic_string/requirements/
5660         explicit_instantiation/debug.cc: Remove XFAIL for old ABI.
5661
5662         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
5663         assertion failures with old std::string ABI.
5664
5665         * include/bits/fs_path.h (path::_List::erase): Replace both overloads
5666         with ...
5667         (path::pop_back(), path::_M_erase_from(const_iterator)): New member
5668         functions that will only erase elements at the end.
5669         * src/filesystem/std-path.cc (path::_List::_Impl::pop_back()): Define.
5670         (path::_List::_Impl::_M_erase_from(const_iterator)): Define.
5671         (path::_List::operator=(const _List&)): Use _M_erase_from(p) instead
5672         of erase(p, end()).
5673         (path::_List::pop_back()): Define.
5674         (path::_List::_M_erase_from(const_iterator)): Define.
5675         (path::operator/=(const path&)): Use pop_back to remove last component
5676         and _M_erase_from to remove multiple components.
5677         (path::_M_append(basic_string_view<value_type>)): Likewise.
5678         (path::operator+=(const path&)): Likewise.
5679         (path::_M_concat(basic_string_view<value_type>)): Likewise.
5680         (path::remove_filename()): Likewise.
5681         (path::lexically_normal()): Use _List::_Impl iterators instead of
5682         path::iterator. Use pop_back to remove components from the end. Clear
5683         trailing filename, instead of using erase(const_iterator) to remove
5684         a non-final component.
5685         * testsuite/27_io/filesystem/path/generation/normal.cc: Test
5686         additional cases.
5687         * testsuite/27_io/filesystem/path/generation/normal2.cc: New test.
5688
5689         * src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
5690         incorrect treatment of empty filename after trailing slash.
5691         * testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.
5692
5693         * testsuite/21_strings/basic_string/modifiers/assign/char/
5694         move_assign_optim.cc: Avoid spurious failure when -fno-inline added
5695         to test flags.
5696         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/
5697         move_assign_optim.cc: Likewise.
5698
5699 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
5700             Jakub Jelinek  <jakub@redhat.com>
5701
5702         PR libstdc++/88607
5703         * include/experimental/memory: Replace UTF-8 quote characters.
5704         * include/std/future: Replace UTF-8 "em dash" characters.
5705
5706 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
5707
5708         PR libstdc++/88607
5709         * include/bits/forward_list.h: Replace UTF-8 "ligature fi" character.
5710         * include/debug/forward_list: Likewise.
5711         * include/experimental/bits/shared_ptr.h: Remove UTF-8 "section sign"
5712         character.
5713         * include/experimental/chrono: Likewise.
5714         * include/experimental/functional: Likewise.
5715         * include/experimental/ratio: Likewise.
5716         * include/experimental/system_error: Likewise.
5717         * include/experimental/tuple: Likewise.
5718         * include/experimental/type_traits: Likewise.
5719         * include/parallel/workstealing.h: Replace UTF-8 "en dash" character.
5720         * include/parallel/multiseq_selection.h: Likewise.
5721
5722         PR libstdc++/88681
5723         * config/abi/pre/gnu.ver: Add missing exports.
5724         * testsuite/22_locale/collate_byname/88681.cc: New test.
5725         * testsuite/22_locale/time_get/get/char/88681.cc: New test.
5726         * testsuite/22_locale/time_get/get/wchar_t/88681.cc: New test.
5727
5728 2019-01-02  Jonathan Wakely  <jwakely@redhat.com>
5729
5730         * testsuite/23_containers/map/cons/deduction.cc: Test deduction from
5731         initializer_list<value_type> and from input iterator ranges.
5732         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
5733
5734         * testsuite/experimental/string_view/element_access/char/empty.cc:
5735         Fix year range in copyright header.
5736
5737 2019-01-02  Joel Brobecker  <brobecker@adacore.com>
5738
5739         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
5740         Fix year range in copyright header.
5741
5742 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
5743
5744         Update copyright years.
5745 \f
5746 Copyright (C) 2019 Free Software Foundation, Inc.
5747
5748 Copying and distribution of this file, with or without modification,
5749 are permitted in any medium without royalty provided the copyright
5750 notice and this notice are preserved.