Change test to use const variables instead of macros

[thirdparty/gcc.git] / libstdc++-v3 / ChangeLog

2019-03-11  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc: Use
        const variables instead of macros.

        PR libstdc++/89629
        * libsupc++/hash_bytes.cc [__SIZEOF_SIZE_T__ == 8] (_Hash_bytes):
        Use correct type for len_aligned.
        * testsuite/20_util/hash/89629.cc: New test.

2019-03-11  Jakub Jelinek  <jakub@redhat.com>

        PR libstdc++/89641
        * include/std/atomic (atomic<T>::store, atomic<T>::load,
        atomic<T>::exchange, atomic<T>::compare_exchange_weak,
        atomic<T>::compare_exchange_strong): Cast __m or __s and __f to int.
        * include/bits/atomic_base.h (__atomic_base<T>::operator++,
        __atomic_base<T>::operator--, __atomic_base<T>::operator+=,
        __atomic_base<T>::operator-=, __atomic_base<T>::operator&=,
        __atomic_base<T>::operator|=, __atomic_base<T>::operator^=,
        __atomic_base<T*>::operator++, __atomic_base<T*>::operator--,
        __atomic_base<T*>::operator+=, __atomic_base<T*>::operator-=): Cast
        memory_order_seq_cst to int.

2019-03-08  Jonathan Wakely  <jwakely@redhat.com>

        * doc/xml/manual/using.xml: Use link element instead of xref.
        * doc/html/*: Regenerate.

        * include/bits/fs_path.h (path::format): Add fixed underlying type.

2019-03-08  François Dumont  <fdumont@gcc.gnu.org>

        PR libstdc++/89477
        * include/debug/map.h (map): Use _RequireNotAllocator to constrain
        parameters in deduction guides.
        * include/debug/multimap.h (multimap): Likewise.
        * include/debug/set.h (multimap): Likewise.
        * include/debug/multiset.h (multimap): Likewise.
        * include/debug/unordered_map (unordered_map): Likewise.
        (unordered_multimap): Likewise.
        * include/debug/unordered_set (unordered_set): Likewise.
        (unordered_multiset): Likewise.

        PR libstdc++/89608
        * include/debug/unordered_map (unordered_map<>::_M_check_rehashed):
        Invalidate all iterators in case of rehash.
        (unordered_multimap<>::_M_check_rehashed): Likewise.
        * include/debug/unordered_set
        (unordered_set<>::_M_check_rehashed): Likewise.
        (unordered_multiset<>::_M_check_rehashed): Likewise.
        * testsuite/23_containers/unordered_set/debug/89608_neg.cc: New.

2019-03-07  Andreas Schwab  <schwab@suse.de>

        * config/abi/post/riscv64-linux-gnu: New directory.
        * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: New file.

2019-03-07  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/20_util/function_objects/bind_front/1.cc: Change from
        compile test to run. Fix typo.

        * doc/xml/manual/status_cxx2020.xml: Update C++20 status.
        * doc/html/*: Regenerate.

        P0356R5 Simplified partial function application
        * include/std/functional [C++20] (_Bind_front, _Bind_front_t): Define
        helpers for bind_front.
        (bind_front, __cpp_lib_bind_front): Define.
        * testsuite/20_util/function_objects/bind_front/1.cc: New test.

2019-03-06  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/type_traits (__cpp_lib_bounded_array_traits): Define.
        * include/std/version (__cpp_lib_bounded_array_traits): Likewise.
        * testsuite/20_util/is_bounded_array/value.cc: Check for macro.
        * testsuite/20_util/is_unbounded_array/value.cc: Likewise.

2019-03-06  Edward Smith-Rowland  <3dw4rd@verizon.net>

        PR libstdc++/86655 - std::assoc_legendre should not constrain
        the value of m (or x).
        * include/tr1/legendre_function.tcc (__assoc_legendre_p,
        __sph_legendre): If degree > order Don't throw, return 0.
        (__legendre_p, __assoc_legendre_p): Don't constrain x either.
        * testsuite/special_functions/02_assoc_legendre/pr86655.cc: New test.
        * testsuite/special_functions/20_sph_legendre/pr86655.cc: New test.
        * testsuite/tr1/5_numerical_facilities/special_functions/
        02_assoc_legendre/pr86655.cc: New test.
        * testsuite/tr1/5_numerical_facilities/special_functions/
        22_sph_legendre/pr86655.cc: New test.

2019-03-06  Ville Voutilainen  <ville.voutilainen@gmail.com>

        Rewrite variant.
        Also PR libstdc++/85517
        * include/std/variant (__do_visit): New.
        (__variant_cast): Likewise.
        (__variant_cookie): Likewise.
        (__erased_*): Remove.
        (_Variant_storage::_S_vtable): Likewise.
        (_Variant_storage::__M_reset_impl): Adjust to use __do_visit.
        (_Variant_storage::__M_reset): Adjust.
        (__variant_construct): New.
        (_Copy_ctor_base(const _Copy_ctor_base&)): Adjust to use
        __variant_construct.
        (_Move_ctor_base(_Move_ctor_base&&)): Likewise.
        (_Move_ctor_base::__M_destructive_copy): New.
        (_Move_ctor_base::__M_destructive_move): Adjust to use
        __variant_construct.
        (_Copy_assign_base::operator=): Adjust to use __do_visit.
        (_Copy_assign_alias): Adjust to check both copy assignment
        and copy construction for triviality.
        (_Move_assign_base::operator=): Adjust to use __do_visit.
        (_Multi_array): Add support for visitors that accept and return
        a __variant_cookie.
        (__gen_vtable_impl::_S_apply_all_alts): Likewise.
        (__gen_vtable_impl::_S_apply_single_alt): Likewise.
        (__gen_vtable_impl::__element_by_index_or_cookie): New. Generate
        a __variant_cookie temporary for a variant that is valueless and..
        (__gen_vtable_impl::__visit_invoke): ..adjust here.
        (__gen_vtable::_Array_type): Conditionally make space for
        the __variant_cookie visitor case.
        (__variant_construct_by_index): New.
        (get_if): Adjust to use std::addressof.
        (relops): Adjust to use __do_visit.
        (variant): Add __variant_cast and __variant_construct_by_index
        as friends.
        (variant::emplace): Use _M_reset() and __variant_construct_by_index
        instead of self-destruction.
        (variant::swap): Adjust to use __do_visit.
        (visit): Reimplement in terms of __do_visit.
        (__variant_hash_call_base_impl::operator()): Adjust to use __do_visit.
        * testsuite/20_util/variant/compile.cc: Adjust.
        * testsuite/20_util/variant/run.cc: Likewise.

2019-03-06  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/c++config.h (_cpp_lib_char8_t): Add L suffix to
        constant.
        * testsuite/experimental/feat-char8_t.cc: Likewise.

         * include/std/type_traits [C++20] (is_bounded_array)
         (is_unbounded_array, is_bounded_array_v, is_unbounded_array_v):
         Define.
         * testsuite/20_util/is_bounded_array/requirements/
         explicit_instantiation.cc: New test.
         * testsuite/20_util/is_bounded_array/requirements/typedefs.cc: New
         test.
         * testsuite/20_util/is_bounded_array/value.cc: New test.
         * testsuite/20_util/is_unbounded_array/requirements/
         explicit_instantiation.cc: New test.
         * testsuite/20_util/is_unbounded_array/requirements/typedefs.cc: New
         * test.
         * testsuite/20_util/is_unbounded_array/value.cc: New test.

        * include/bits/ptr_traits.h [C++20] (pointer_traits<T*>::pointer_to):
        Add constexpr.
        * testsuite/20_util/pointer_traits/pointer_to_constexpr.cc: New test.

2019-03-05  Jonathan Wakely  <jwakely@redhat.com>

        * include/c_compatibility/math.h [C++20] (lerp): Add using
        declaration.
        * include/c_global/cmath [C++20] (__cpp_lib_interpolate): Define.
        (__lerp): Define function template to implement lerp.
        (lerp(float, float, float), lerp(double, double, double))
        (lerp(long double, long double, long double)): Define for C++20.
        * include/std/numeric [C++20] (__cpp_lib_interpolate): Define.
        (midpoint(T, T), midpoint(T*, T*)): Define.
        * include/std::version [C++20] (__cpp_lib_interpolate): Define.
        * testsuite/26_numerics/lerp.cc: New test.
        * testsuite/26_numerics/midpoint/floating.cc: New test.
        * testsuite/26_numerics/midpoint/integral.cc: New test.
        * testsuite/26_numerics/midpoint/pointer.cc: New test.

2019-03-04  Edward Smith-Rowland  <3dw4rd@verizon.net>

        PR libstdc++/88996 Implement P0439R0
        Make std::memory_order a scoped enumeration.
        * include/bits/atomic_base.h: For C++20 make memory_order a scoped enum,
        add variables for the old enumerators.  Adjust calls.
        * testsuite/29_atomics/headers/atomic/types_std_c++2a.cc: New test.
        * testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc: New test.

2019-03-04  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Remove bogus dg-do
        directive.

        * include/std/memory_resource (polymorphic_allocator): Add default
        template argument for C++20.
        (polymorphic_allocator::allocate_bytes)
        (polymorphic_allocator::deallocate_bytes)
        (polymorphic_allocator::allocate_object)
        (polymorphic_allocator::deallocate_object)
        (polymorphic_allocator::new_object)
        (polymorphic_allocator::delete_object): New member functions for
        C++20.
        * testsuite/20_util/polymorphic_allocator/allocate_object.cc: New
        test.

2019-03-03  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/89562
        * src/filesystem/ops-common.h (do_copy_file): Open files in binary
        mode for mingw.

2019-03-01  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/util/testsuite_allocator.h (__gnu_test::memory_resource)
        [!__cpp_sized_deallocation]: Do not pass size to operator delete.

        * include/std/memory (uses_allocator_construction_args): New set of
        overloaded functions.
        (make_obj_using_allocator, uninitialized_construct_using_allocator):
        New functions.
        * include/std/memory_resource (polymorphic_allocator::construct)
        [__cplusplus > 201703l]: Replace all overloads with a single function
        using uses_allocator_construction_args.
        * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: New
        test.
        * testsuite/20_util/uses_allocator/make_obj.cc: New test.

2019-02-27  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/89466
        * acinclude.m4 (GLIBCXX_CONFIGURE_DOCBOOK): Reorder check for local
        stylesheet directories before check for xsltproc. Try to use
        xmlcatalog to find local stylesheet directory before trying hardcoded
        paths. Add path used by suse to hardcoded paths. Adjust xsltproc
        check to look for the same stylesheet as doc/Makefile.am uses. Don't
        use xsltproc if xmlcatalog fails to find a local stylesheet.
        * configure.ac: Check for xmlcatalog.
        * Makefile.in: Regenerate.
        * configure: Likewise.
        * doc/Makefile.in: Likewise.
        * include/Makefile.in: Likewise.
        * libsupc++/Makefile.in: Likewise.
        * po/Makefile.in: Likewise.
        * python/Makefile.in: Likewise.
        * src/Makefile.in: Likewise.
        * src/c++11/Makefile.in: Likewise.
        * src/c++17/Makefile.in: Likewise.
        * src/c++98/Makefile.in: Likewise.
        * src/filesystem/Makefile.in: Likewise.
        * testsuite/Makefile.in: Likewise.

2019-02-26  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/89477
        * include/bits/alloc_traits.h (_RequireNotAllocator): New helper for
        container deduction guides.
        * include/bits/hashtable.h (_RequireNotAllocatorOrIntegral): Likewise.
        * include/bits/stl_map.h (map): Use _RequireNotAllocator to constrain
        parameters in deduction guides.
        * include/bits/stl_multimap.h (multimap): Likewise.
        * include/bits/stl_multiset.h (multiset): Likewise.
        * include/bits/stl_queue.h (queue, priority_queue): Likewise.
        * include/bits/stl_set.h (set): Likewise.
        * include/bits/stl_stack.h (stack): Likewise.
        * include/bits/unordered_map.h (unordered_map, unordered_multimap):
        use _RequireNotAllocator and _RequireNotAllocatorOrIntegral to
        constrain parameters in deduction guides.
        * include/bits/unordered_set.h (unordered_set, unordered_multiset):
        Likewise.
        * testsuite/23_containers/map/cons/deduction.cc: Test additional
        deduction cases.
        * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
        * testsuite/23_containers/set/cons/deduction.cc: Likewise.
        * testsuite/23_containers/unordered_map/cons/deduction.cc: Likewise.
        * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
        Likewise.
        * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
        Likewise.
        * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.

        PR libstdc++/89416
        * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Change
        to class template and partial specialization using void_t.
        (__is_copy_insertable, __is_move_insertable): Adjust base class.

2019-02-24  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/89416
        * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Make
        copy and move members public.

2019-02-23  Jonathan Wakely  <jwakely@redhat.com>

        * include/std/type_traits (__underlying_type_impl): New helper to
        make underlying_type SFINAE-friendly.
        (underlying_type): Derive from __underlying_type_impl.
        * testsuite/20_util/underlying_type/requirements/typedefs-3.cc: New
        test.

        PR libstdc++/89446
        * include/bits/char_traits.h (__constant_char_array): Check index is
        in range before dereferencing.
        (char_traits<char>::compare, char_traits<char>::find)
        (char_traits<char8_t>::compare, char_traits<char8_t>::find): Return
        immediately if n is zero.
        (char_traits<wchar_t>::compare, char_traits<wchar_t>::find): Likewise.
        Remove workarounds for PR 67026.
        * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
        New test.
        * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
        New test.

2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>

        * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Adjust.
        * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.

2019-02-22  Jakub Jelinek  <jakub@redhat.com>

        PR libstdc++/89402
        * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Change return
        type to std::size_t and argument to type to long double.

2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>

        * configure.host (abi_baseline_pair): Adjust for SPARC64/Linux.
        * config/abi/post/sparc64-linux-gnu: New directory.
        * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: New file.
        * config/abi/post/sparc64-linux-gnu/32: New directory.
        * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: New file.

2019-02-21  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/29_atomics/headers/atomic/types_std_c++20.cc: New test.
        * testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc: New
        test.

2019-02-22  Tom Honermann  <tom@honermann.net>

        * python/libstdcxx/v6/printers.py (register_type_printers): Add type
        printers for u8string and u8string_view.

2019-02-22  Tom Honermann  <tom@honermann.net>

        * testsuite/18_support/byte/ops.cc: Validate
        std::to_integer<char8_t>, std::to_integer<char16_t>, and
        std::to_integer<char32_t>.
        * testsuite/18_support/numeric_limits/dr559.cc: Validate
        std::numeric_limits<char8_t>.
        * testsuite/18_support/numeric_limits/lowest.cc: Validate
        std::numeric_limits<char8_t>::lowest().
        * testsuite/18_support/numeric_limits/max_digits10.cc: Validate
        std::numeric_limits<char8_t>::max_digits10.
        * testsuite/18_support/type_info/fundamental.cc: Validate
        typeinfo for char8_t.
        * testsuite/20_util/from_chars/1_c++20_neg.cc: New test, validating
        std::from_chars with char8_t.
        * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
        Validate explicit instantiation of std::hash<char8_t>.
        * testsuite/20_util/is_integral/value.cc: Validate
        std::is_integral<char8_t>.
        * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
        Validate std::make_signed<char8_t>.
        * testsuite/21_strings/basic_string/cons/char/deduction.cc:
        Validate u8string construction from char8_t sources.
        * testsuite/21_strings/basic_string/types/pmr_typedefs.cc: Validate
        std::pmr::u8string.
        * testsuite/21_strings/basic_string_view/operations/compare/
        char/70483.cc: Validate substr operations on u8string_view.
        * testsuite/21_strings/basic_string_view/typedefs.cc: Validate that
        the u8string_view typedef is defined.
        * testsuite/21_strings/char_traits/requirements/
        constexpr_functions.cc: Validate char_traits<char8_t> constexpr
        member functions.
        * testsuite/21_strings/char_traits/requirements/
        constexpr_functions_c++17.cc: Validate char_traits<char8_t> C++17
        constexpr member functions.
        * testsuite/21_strings/headers/string/types_std_c++0x.cc: Validate
        that the u8string typedef is defined.
        * testsuite/22_locale/locale/cons/unicode.cc: Validate the presence
        of the std::codecvt<char16_t, char8_t, std::mbstate_t> and
        std::codecvt<char32_t, char8_t, std::mbstate_t> facets.
        * testsuite/29_atomics/atomic/cons/assign_neg.cc: Update line
        numbers.
        * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
        * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
        Likewise.
        * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
        * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
        Validate std::atomic<char8_t>::is_always_lock_free
        * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
        Update line numbers.
        * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
        Likewise.
        * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
        Likewise.
        * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
        Validate std::experimental::pmr::u8string.
        * testsuite/experimental/string_view/typedefs.cc: Validate that the
        u8string_view typedef is defined.
        * testsuite/util/testsuite_common_types.h: Add char8_t, char16_t and
        char32_t to the typelists.

2019-02-22  Tom Honermann  <tom@honermann.net>

        * include/ext/typelist.h: Constrain a partial specialization of
        typelist::detail::append_ to only match chain<T1,T2>.

2019-02-21  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/89416
        * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Replace
        class template with class. Replace move and copy member types with
        member alias templates, so they are only instantiated when needed.
        (__is_copy_insertable, __is_move_insertable): Adjust base class.
        * testsuite/23_containers/vector/modifiers/push_back/89130.cc: Enable
        test for C++11/14/17 as well.
        * testsuite/23_containers/vector/modifiers/push_back/89416.cc: New
        test.

2019-02-20  Jakub Jelinek  <jakub@redhat.com>

        PR libstdc++/89402
        * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Add
        _GLIBCXX_PURE to the alias declaration.

2019-02-19  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/21_strings/basic_string/literals/types.cc
        [_GLIBCXX_USE_CHAR8_T]: Adjust expected string type for u8 literal.
        * testsuite/21_strings/basic_string/literals/values.cc
        [_GLIBCXX_USE_CHAR8_T]: Likewise.
        * testsuite/22_locale/codecvt/char16_t.cc: Adjust for u8 literals
        potentially having different type.
        * testsuite/22_locale/codecvt/char32_t.cc: Likewise.
        * testsuite/22_locale/codecvt/codecvt_utf8/79980.cc: Cast u8 literal
        to char.
        * testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: Likewise.
        * testsuite/22_locale/codecvt/utf8.cc: Likewise.
        * testsuite/22_locale/conversions/string/2.cc: Remove u8 prefix from
        string literals only using basic character set.
        * testsuite/22_locale/conversions/string/3.cc: Likewise. Cast other
        u8 literals to char.
        * testsuite/29_atomics/headers/atomic/macros.cc [_GLIBCXX_USE_CHAR8_T]:
        Test ATOMIC_CHAR8_T_LOCK_FREE.
        Add missing #error to ATOMIC_CHAR16_T_LOCK_FREE test.
        * testsuite/29_atomics/headers/atomic/types_std_c++0x.cc
        [_GLIBCXX_USE_CHAR8_T]: Check for std::atomic_char8_t.
        * testsuite/experimental/string_view/literals/types.cc
        [_GLIBCXX_USE_CHAR8_T]: Adjust expected string_view type for u8
        literal.
        * testsuite/experimental/string_view/literals/values.cc
        [_GLIBCXX_USE_CHAR8_T]: Likewise.

2019-02-19  Tom Honermann  <tom@honermann.net>

        * testsuite/18_support/numeric_limits/char8_t.cc: New test cloned
        from char16_32_t.cc; validates numeric_limits<char8_t>.
        * testsuite/21_strings/basic_string/literals/types-char8_t.cc: New
        test cloned from types.cc; validates operator""s for char8_t
        returns u8string.
        * testsuite/21_strings/basic_string/literals/values-char8_t.cc: New
        test cloned from values.cc; validates construction and comparison
        of u8string values.
        * testsuite/21_strings/basic_string/requirements/
        /explicit_instantiation/char8_t/1.cc: New test cloned from
        char16_t/1.cc; validates explicit instantiation of
        basic_string<char8_t>.
        * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
        New test cloned from types.cc; validates operator""sv for char8_t
        returns u8string_view.
        * testsuite/21_strings/basic_string_view/literals/
        values-char8_t.cc: New test cloned from values.cc; validates
        construction and comparison of u8string_view values.
        * testsuite/21_strings/basic_string_view/requirements/
        explicit_instantiation/char8_t/1.cc: New test cloned from
        char16_t/1.cc; validates explicit instantiation of
        basic_string_view<char8_t>.
        * testsuite/21_strings/char_traits/requirements/char8_t/65049.cc:
        New test cloned from char16_t/65049.cc; validates that
        char_traits<char8_t> is not vulnerable to the concerns in PR65049.
        * testsuite/21_strings/char_traits/requirements/char8_t/
        typedefs.cc: New test cloned from char16_t/typedefs.cc; validates
        that char_traits<char8_t> member typedefs are present and correct.
        * testsuite/21_strings/char_traits/requirements/
        explicit_instantiation/char8_t/1.cc: New test cloned from
        char16_t/1.cc; validates explicit instantiation of
        char_traits<char8_t>.
        * testsuite/22_locale/codecvt/char16_t-char8_t.cc: New test cloned
        from char16_t.cc: validates
        codecvt<char16_t, char8_t, mbstate_t>.
        * testsuite/22_locale/codecvt/char32_t-char8_t.cc: New test cloned
        from char32_t.cc: validates
        codecvt<char32_t, char8_t, mbstate_t>.
        * testsuite/22_locale/codecvt/utf8-char8_t.cc: New test cloned from
        utf8.cc; validates codecvt<char16_t, char8_t, std::mbstate_t> and
        codecvt<char32_t, char8_t, std::mbstate_t>.
        * testsuite/27_io/filesystem/path/native/string-char8_t.cc: New
        test cloned from string.cc; validates filesystem::path construction
        from char8_t input.
        * testsuite/experimental/feat-char8_t.cc: New test; validates that
        the __cpp_lib_char8_t feature test macro is defined with the
        correct value.
        * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
        New test cloned from string.cc; validates filesystem::path
        construction from char8_t input.
        * testsuite/experimental/string_view/literals/types-char8_t.cc: New
        test cloned from types.cc; validates operator""sv for char8_t
        returns u8string_view.
        * testsuite/experimental/string_view/literals/values-char8_t.cc:
        New test cloned from values.cc; validates construction and
        comparison of u8string_view values.
        * testsuite/experimental/string_view/requirements/
        explicit_instantiation/char8_t/1.cc: New test cloned from
        char16_t/1.cc; validates explicit instantiation of
        basic_string_view<char8_t>.
        * testsuite/ext/char8_t/atomic-1.cc: New test; validates that
        ATOMIC_CHAR8_T_LOCK_FREE is not defined if char8_t support is not
        enabled.

2019-02-19  Tom Honermann  <tom@honermann.net>

        P0482R5 char8_t: Standard library support
        * config/abi/pre/gnu-versioned-namespace.ver (CXXABI_2.0): Add
        typeinfo symbols for char8_t.
        * config/abi/pre/gnu.ver: Add CXXABI_1.3.12.
        (GLIBCXX_3.4.26): Add symbols for specializations of
        numeric_limits and codecvt that involve char8_t.
        (CXXABI_1.3.12): Add typeinfo symbols for char8_t.
        * include/bits/atomic_base.h: Add atomic_char8_t.
        * include/bits/basic_string.h: Add std::hash<u8string> and
        operator""s(const char8_t*, size_t).
        * include/bits/c++config: Define _GLIBCXX_USE_CHAR8_T and
        __cpp_lib_char8_t.
        * include/bits/char_traits.h: Add char_traits<char8_t>.
        * include/bits/codecvt.h: Add
        codecvt<char16_t, char8_t, mbstate_t>,
        codecvt<char32_t, char8_t, mbstate_t>,
        codecvt_byname<char16_t, char8_t, mbstate_t>, and
        codecvt_byname<char32_t, char8_t, mbstate_t>.
        * include/bits/cpp_type_traits.h: Add __is_integer<char8_t> to
        recognize char8_t as an integral type.
        * include/bits/fs_path.h: (path::__is_encoded_char): Recognize
        char8_t.
        (path::u8string): Return std::u8string when char8_t support is
        enabled.
        (path::generic_u8string): Likewise.
        (path::_S_convert): Handle conversion from char8_t input.
        (path::_S_str_convert): Likewise.
        * include/bits/functional_hash.h: Add hash<char8_t>.
        * include/bits/locale_conv.h (__str_codecvt_out): Add overloads for
        char8_t.
        * include/bits/locale_facets.h (_GLIBCXX_NUM_UNICODE_FACETS): Bump
        for new char8_t specializations.
        * include/bits/localefwd.h: Add missing declarations of
        codecvt<char16_t, char, mbstate_t> and
        codecvt<char32_t, char, mbstate_t>.  Add char8_t declarations
        codecvt<char16_t, char8_t, mbstate_t> and
        codecvt<char32_t, char8_t, mbstate_t>.
        * include/bits/postypes.h: Add u8streampos
        * include/bits/stringfwd.h: Add declarations of
        char_traits<char8_t> and u8string.
        * include/c_global/cstddef: Add __byte_operand<char8_t>.
        * include/experimental/bits/fs_path.h (path::__is_encoded_char):
        Recognize char8_t.
        (path::u8string): Return std::u8string when char8_t support is
        enabled.
        (path::generic_u8string): Likewise.
        (path::_S_convert): Handle conversion from char8_t input.
        (path::_S_str_convert): Likewise.
        * include/experimental/string: Add u8string.
        * include/experimental/string_view: Add u8string_view,
        hash<experimental::u8string_view>, and
        operator""sv(const char8_t*, size_t).
        * include/std/atomic: Add atomic<char8_t> and atomic_char8_t.
        * include/std/charconv (__is_int_to_chars_type): Recognize char8_t
        as a character type.
        * include/std/limits: Add numeric_limits<char8_t>.
        * include/std/string_view: Add u8string_view,
        hash<experimental::u8string_view>, and
        operator""sv(const char8_t*, size_t).
        * include/std/type_traits: Add __is_integral_helper<char8_t>,
        __make_unsigned<char8_t>, and __make_signed<char8_t>.
        * libsupc++/atomic_lockfree_defines.h: Define
        ATOMIC_CHAR8_T_LOCK_FREE.
        * src/c++11/Makefile.am: Compile with -fchar8_t when compiling
        codecvt.cc and limits.cc so that char8_t specializations of
        numeric_limits and codecvt and emitted.
        * src/c++11/Makefile.in: Likewise.
        * src/c++11/codecvt.cc: Define members of
        codecvt<char16_t, char8_t, mbstate_t>,
        codecvt<char32_t, char8_t, mbstate_t>,
        codecvt_byname<char16_t, char8_t, mbstate_t>, and
        codecvt_byname<char32_t, char8_t, mbstate_t>.
        * src/c++11/limits.cc: Define members of
        numeric_limits<char8_t>.
        * src/c++98/Makefile.am: Compile with -fchar8_t when compiling
        locale_init.cc and localename.cc.
        * src/c++98/Makefile.in: Likewise.
        * src/c++98/locale_init.cc: Add initialization for the
        codecvt<char16_t, char8_t, mbstate_t> and
        codecvt<char32_t, char8_t, mbstate_t> facets.
        * src/c++98/localename.cc: Likewise.
        * testsuite/util/testsuite_abi.cc: Validate ABI bump.

2019-02-18  Wilco Dijkstra  <wdijkstr@arm.com>

        * 27_io/filesystem/operations/all.cc: Add dg-require-filesystem-ts.
        * 27_io/filesystem/operations/resize_file.cc: Likewise.
        * 27_io/filesystem/path/generation/normal2.cc: Likewise.

2019-02-14  Jonathan Wakely  <jwakely@redhat.com>

        * doc/xml/manual/status_cxx2020.xml: Update P0887R1 status.
        * doc/html/*: Regenerate.

        * doc/xml/manual/status_cxx2017.xml: Add P0063R3 to status table.
        * doc/html/*: Regenerate.

        * doc/xml/manual/intro.xml: Document LWG 2586 status.
        * include/bits/uses_allocator.h (__uses_alloc): Use const lvalue
        allocator type in is_constructible checks.
        * testsuite/20_util/scoped_allocator/69293_neg.cc: Adjust dg-error.
        * testsuite/20_util/scoped_allocator/dr2586.cc: New test.
        * testsuite/20_util/tuple/cons/allocators.cc: Add test using
        problematic type from LWG 2586 discussion.
        * testsuite/20_util/uses_allocator/69293_neg.cc: Adjust dg-error.
        * testsuite/20_util/uses_allocator/cons_neg.cc: Likewise.

        * configure.ac: Check for C11 timespec_get function.
        * crossconfig.m4 (freebsd, linux, gnu, cygwin, solaris, netbsd)
        (openbsd): Likewise
        * config.h.in: Regenerate.
        * configure: Regenerate.
        * include/c_global/ctime (timespec, timespec_get): Add to namespace
        std for C++17 and up.

        * doc/xml/manual/intro.xml: Document LWG 2537 status.
        * include/bits/stl_queue.h
        (priority_queue(const Compare&, const Container&, const Alloc&))
        (priority_queue(const Compare&, Container&&, const Alloc&)): Call
        make_heap.
        * testsuite/23_containers/priority_queue/dr2537.cc: New test.

        * doc/xml/manual/intro.xml: Document LWG 2566 status.
        * include/bits/stl_queue.h (queue, priority_queue): Add static
        assertions to enforce LWG 2566 requirement on value_type.
        * include/bits/stl_stack.h (stack): Likewise.

        PR middle-end/89303
        * testsuite/20_util/enable_shared_from_this/89303.cc: New test.

        * doc/xml/manual/intro.xml: Document LWG 2735 status.
        * include/bits/std_abs.h: Add comment about LWG 2735.
        * testsuite/26_numerics/headers/cstdlib/dr2735.cc: New test.

2019-02-13  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/89345
        * include/std/version [__cpp_impl_destroying_delete]
        (__cpp_lib_destroying_delete): Only define for C++2a and later.
        * libsupc++/new [__cpp_impl_destroying_delete]
        (__cpp_lib_destroying_delete): Likewise.
        (destroying_delete_t, destroying_delete): Likewise, but define even
        when __cpp_impl_destroying_delete is not defined.
        * testsuite/18_support/destroying_delete.cc: New test.

2019-02-11  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/89023
        * testsuite/17_intro/headers/c++2011/parallel_mode.cc: New test.
        * testsuite/17_intro/headers/c++2014/parallel_mode.cc: New test.
        * testsuite/17_intro/headers/c++2017/parallel_mode.cc: New test.
        * testsuite/28_regex/headers/regex/parallel_mode.cc: Remove.

2019-02-09  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/71044
        * include/bits/fs_path.h (path::has_root_name)
        (path::has_root_directory, path::has_root_path)
        (path::has_relative_path, path::has_parent_path)
        (path::has_filename, path::has_stem, path::has_extension)
        (path::is_absolute, path::is_relative, path::_M_find_extension): Add
        noexcept.
        * src/c++17/fs_path.cc (path::has_root_name)
        (path::has_root_directory, path::has_root_path)
        (path::has_relative_path, path::has_parent_path)
        (path::has_filename, path::_M_find_extension): Add noexcept.

2019-02-06  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/89102 (partial)
        * include/std/type_traits (common_type<>): Define.
        (common_type<T>): Derive from common_type<T, T>.
        * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
        Test zero-length template argument list.
        * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
        Test additional single argument cases.
        * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
        Adjust expected error.

2019-02-05  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/89128
        * include/bits/stl_queue.h (queue, priority_queue): Add deduction
        guides.
        * include/bits/stl_stack.h (stack): Likewise.
        * testsuite/23_containers/priority_queue/deduction.cc: New test.
        * testsuite/23_containers/queue/deduction.cc: New test.
        * testsuite/23_containers/stack/deduction.cc: New test.

        PR libstdc++/89194
        * include/std/type_traits (__is_convertible_helper)
        (__is_convertible_helper<_From, _To, false>): Revert changes to
        support is_nothrow_convertible.
        (__is_nt_convertible_helper): New helper.
        (is_nothrow_convertible): Use __is_nt_convertible_helper.

        * testsuite/23_containers/vector/modifiers/push_back/49836.cc: Restore
        use of CopyConsOnlyType, but also test DelAnyAssign for completeness.

        PR libstdc++/89130
        * include/bits/alloc_traits.h (__is_copy_insertable_impl): Rename to
        __is_alloc_insertable_impl. Replace single type member with two
        members, one for each of copy and move insertable.
        (__is_move_insertable): New trait for internal use.
        * include/bits/stl_vector.h (vector::_S_nothrow_relocate(true_type))
        (vector::_S_nothrow_relocate(true_type)): New functions to
        conditionally check if __relocate_a can throw.
        (vector::_S_use_relocate()): Dispatch to _S_nothrow_relocate based
        on __is_move_insertable.
        (vector::_S_do_relocate): New overloaded functions to conditionally
        call __relocate_a.
        (vector::_S_relocate): New function that dispatches to _S_do_relocate
        based on _S_use_relocate.
        * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
        (vector::_M_default_append): Call _S_relocate instead of __relocate_a.
        * testsuite/23_containers/vector/modifiers/push_back/89130.cc: New.

        PR libstdc++/89090
        * include/bits/stl_uninitialized.h (__relocate_a_1): Make unused
        parameter unnamed. Add message to static assertion.
        * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
        (vector::_M_default_append): Use _GLIBCXX17_CONSTEXPR for if constexpr
        in C++11 code.

2019-02-05  Marc Glisse  <marc.glisse@inria.fr>

        PR libstdc++/87106
        * include/bits/stl_uninitialized.h (__is_trivially_relocatable):
        Rename...
        (__is_bitwise_relocatable): ... to this.
        (__relocate_a_1): Adapt.
        * include/bits/stl_deque.h (__is_trivially_relocatable): Rename...
        (__is_bitwise_relocatable): ... to this.

2019-01-30  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/89117
        * src/c++17/fs_path.cc (path::replace_extension): Erase extension from
        final component as well as from _M_pathname. Append the dot using
        operator+= instead of only to _M_pathname.
        (path::_M_find_extension): Reformat slightly.
        * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
        Add more test cases.

2019-01-30  Ulrich Drepper  <drepper@redhat.com>

        * doc/xml/manual/status_cxx2020.xml: Update P0600 entry.

2019-01-29  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/26_numerics/headers/complex/synopsis.cc: Remove incorrect
        constexpr specifiers from arg and proj.

        * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
        __shared_ptr instantiations used by gcc4-compatible ABI.

        * include/experimental/forward_list (experimental::erase): Qualify
        call to erase_if.
        * include/experimental/list (experimental::erase): Likewise.
        * include/std/forward_list (std::erase): Likewise.
        * include/std/list (std::erase): Likewise.

        * testsuite/20_util/reference_wrapper/result_type.cc: Disable for
        C++2a.
        * testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
        * testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
        * testsuite/20_util/reference_wrapper/typedefs.cc: Likewise.
        * testsuite/30_threads/async/54297.cc: Suppress nodiscard warning.
        * testsuite/ext/array_allocator/26875.cc: Likewise.
        * testsuite/ext/pool_allocator/allocate_chunk.cc: Likewise.
        * testsuite/util/replacement_memory_operators.h: Likewise.
        * testsuite/util/testsuite_allocator.h: Likewise.

        * include/std/memory_resource (__pool_resource::_M_unpooled): Use
        normal mode vector, even for debug mode.
        * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
        Define alias template for normal mode vector.

2019-01-28  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/68737
        * config/locale/generic/c_locale.h (__convert_from_v)
        [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
        * config/os/hpux/os_defines.h: Define _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
        * include/bits/locale_facets.tcc (num_put::_M_insert_float)
        [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.

2019-01-24  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/88840
        * include/bits/stl_vector.h (vector::__use_relocate): Replace static
        data member with static member function _S_use_relocate().
        * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
        (vector::_M_default_append): Use _S_use_relocate() instead of
        __use_relocate.

        * testsuite/27_io/filesystem/path/compare/strings.cc: Only compare
        sign of results.

2019-01-22  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/88740
        * testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
        write to stderr instead of using printf.

2019-01-21  Jakub Jelinek  <jakub@redhat.com>

        PR libstdc++/86590
        * include/bits/char_traits.h (__constant_string_p,
        __constant_char_array_p): Use __builtin_is_constant_evaluated if
        available.

2019-01-20  Ulrich Drepper  <drepper@redhat.com>

        Implement C++20 P0600r1.
        * include/backward/hash_map: Add nodiscard attribute to empty.
        * include/backward/hash_set: Likewise.
        * backward/hashtable.h: Likewise.
        * include/bits/basic_string.h: Likewise.
        * include/bits/forward_list.h: Likewise.
        * include/bits/hashtable.h: Likewise.
        * include/bits/regex.h: Likewise.
        * include/bits/stl_deque.h: Likewise.
        * include/bits/stl_list.h: Likewise.
        * include/bits/stl_map.h: Likewise.
        * include/bits/stl_multimap.h: Likewise.
        * include/bits/stl_multiset.h: Likewise.
        * include/bits/stl_queue.h: Likewise.
        * include/bits/stl_set.h: Likewise.
        * include/bits/stl_stack.h: Likewise.
        * include/bits/stl_tree.h: Likewise.
        * include/bits/stl_vector.h: Likewise.
        * include/bits/unordered_map.h: Likewise.
        * include/bits/unordered_set.h: Likewise.
        * include/debug/array: Likewise.
        * include/experimental/any: Likewise.
        * include/experimental/bits/fs_path.h: Likewise.
        * include/experimental/internet: Likewise.
        * include/experimental/string_view: Likewise.
        * include/ext/pb_ds/detail/bin_search_tree_/info_fn_imps.hpp:
        Likewise.
        * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp:
        Likewise.
        * include/ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp:
        Likewise.
        * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:
        Likewise.
        * include/ext/pb_ds/detail/cc_hash_table_map_/info_fn_imps.hpp:
        Likewise.
        * include/ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp:
        Likewise.
        * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp:
        Likewise.
        * include/ext/pb_ds/detail/gp_hash_table_map_/info_fn_imps.hpp:
        Likewise.
        * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
        info_fn_imps.hpp: Likewise.
        * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
        left_child_next_sibling_heap_.hpp: Likewise.
        * include/ext/pb_ds/detail/list_update_map_/info_fn_imps.hpp:
        Likewise.
        * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp:
        Likewise.
        * include/ext/pb_ds/detail/ov_tree_map_/info_fn_imps.hpp:
        Likewise.
        * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hp:
        Likewise.
        * include/ext/pb_ds/detail/pat_trie_/info_fn_imps.hpp:
        Likewise.
        * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:
        Likewise.
        * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp:
        Likewise.
        * include/ext/pb_ds/detail/tree_trace_base.hpp: Likewise.
        * include/ext/pb_ds/trie_policy.hpp: Likewise.
        * include/ext/rope: Likewise.
        * include/ext/slist: Likewise.
        * include/ext/vstring.h: Likewise.
        * include/profile/array: Likewise.
        * include/std/array: Likewise.
        * include/tr1/array: Likewise.
        * include/tr1/hashtable.h: Likewise.
        * include/tr1/regex: Likewise.
        * include/tr2/dynamic_bitset: Likewise.
        * include/bits/alloc_traits.h: Add nodiscard attribute to
        allocate.
        * include/experimental/memory_resource: Likewise.
        * include/ext/alloc_traits.h: Likewise.
        * include/ext/array_allocator.h: Likewise.
        * include/ext/bitmap_allocator.h: Likewise.
        * include/ext/debug_allocator.h: Likewise.
        * include/ext/extptr_allocator.h: Likewise.
        * include/ext/mt_allocator.h: Likewise.
        * include/ext/new_allocator.h: Likewise.
        * include/ext/pool_allocator.h: Likewise.
        * include/ext/throw_allocator.h: Likewise.
        * include/std/scoped_allocator: Likewise.
        * libsupc++/eh_alloc.cc: Likewise.
        * include/std/future: Add nodiscard attribute to async.
        * libsupc++/new: Add nodiscard attribute to new.

2019-01-18  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/87514
        PR libstdc++/87520
        PR libstdc++/88782
        * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export new symbol.
        * include/bits/shared_ptr.h
        (shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...))
        (allocate_shared): Change to use new tag type.
        * include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_eq):
        Declare new member function.
        (_Sp_alloc_shared_tag): Define new type.
        (_Sp_counted_ptr_inplace): Declare __shared_count<_Lp> as a friend.
        (_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Use
        _Sp_make_shared_tag::_S_eq to check type_info.
        (__shared_count(Ptr, Deleter),__shared_count(Ptr, Deleter, Alloc)):
        Constrain to prevent being called with _Sp_alloc_shared_tag.
        (__shared_count(_Sp_make_shared_tag, const _Alloc&, Args&&...)):
        Replace constructor with ...
        (__shared_count(Tp*&, _Sp_alloc_shared_tag<_Alloc>, Args&&...)): Use
        reference parameter so address of the new object can be returned to
        the caller. Obtain the allocator from the tag type.
        (__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Replace
        constructor with ...
        (__shared_ptr(_Sp_alloc_shared_tag<Alloc>, Args&&...)): Pass _M_ptr
        to the __shared_count constructor.
        (__allocate_shared): Change to use new tag type.
        * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq): Define.

2019-01-17  Jonathan Wakely  <jwakely@redhat.com>

        * src/c++17/fs_ops.cc
        (equivalent(const path&, const path&, error_code&))
        [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use GetFileInformationByHandle to
        compare files instead of relying on incomplete info returned by stat.

        PR libstdc++/88884
        * src/c++17/fs_ops.cc (absolute(const path&, error_code&)): Do nothing
        if the path is already absolute.
        [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize root-directory.
        [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Pass error_code to current_path.

        PR libstdc++/88881
        * src/c++17/fs_ops.cc (canonical(const path&, error_code&))
        [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize path, to match behaviour
        of filesystem::exists.
        (create_directories(const path&, error_code&)): Add assertions.
        (status(const path&, error_code&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
        Add workaround for bug in _wstat for paths with trailing slash.
        * testsuite/27_io/filesystem/operations/create_directories.cc: Adjust
        for expected behaviour on mingw.
        * testsuite/experimental/filesystem/operations/create_directories.cc:
        Likewise.
        * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Use
        "TMP" instead of "TMPDIR" and clean environment before each test. Do
        not test permissions on mingw targets.

2019-01-16  Jonathan Wakely  <jwakely@redhat.com>

        * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
        constructors and open members taking wide strings. Fix patterns for
        filesystem::path members to match wstring_view parameters. Add
        exports for shared_ptr members used by directory iterators.
        * src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
        error code parameter if the file doesn't exist.
        * src/filesystem/ops.cc (remove(const path&, error_code&)):
        Likewise.
        * testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
        values for mingw targets, where "/" is not an absolute path. Do not
        test symlinks on mingw targets.
        * testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
        * testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
        on mingw targets.
        * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
        * testsuite/27_io/filesystem/operations/create_directories.cc: Check
        that each component of the path is created.
        * testsuite/experimental/filesystem/operations/create_directories.cc:
        Likewise.
        * testsuite/27_io/filesystem/operations/exists.cc: Do not test
        permissions on mingw targets.
        * testsuite/experimental/filesystem/operations/exists.cc: Likewise.
        * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
        * testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
        * testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
        mingw targets.
        * testsuite/experimental/filesystem/operations/permissions.cc:
        Likewise.
        * testsuite/27_io/filesystem/operations/remove.cc: Do not test
        symlinks or permissions on mingw targets.
        * testsuite/experimental/filesystem/operations/remove.cc: Likewise.
        * testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
        symlinks on mingw targets.
        * testsuite/experimental/filesystem/operations/remove_all.cc:
        Likewise.
        * testsuite/27_io/filesystem/operations/status.cc: Do not test
        permissions on mingw targets.
        * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
        test symlinks on mingw targets.
        * testsuite/experimental/filesystem/operations/space.cc: Fix test
        for mingw targets.

2019-02-14  Ulrich Drepper  <drepper@redhat.com>

        PR libstdc++/88738
        Warn about unused comparisons of shared_ptr/unique_ptr
        * include/bits/c++config [_GLIBCXX_NODISCARD]: Define.
        * include/bits/shared_ptr.h: Use it for operator ==, !=,
        <, <=, >, >= for shared_ptr.
        * include/bits/unique_ptr.h: Likewise for unique_ptr.

2019-01-15  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/shared_ptr_base.h (__cpp_lib_shared_ptr_arrays): Define
        as 201611L, because P0497R0 changes are supported.
        * include/std/version (__cpp_lib_shared_ptr_arrays): Likewise.

        * include/bits/erase_if.h [__cplusplus > 201703L]
        (__cpp_lib_erase_if): Only define for C++2a.
        * include/std/iterator [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
        (__cpp_lib_null_iterators): Define.
        * include/std/version [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
        (__cpp_lib_null_iterators): Define.
        [__cpp_impl_destroying_delete] (__cpp_lib_destroying_delete): Define.

        * doc/xml/manual/status_cxx2017.xml: Document P0032R3 and P0307R2
        status.
        * include/bits/stl_uninitialized.h (__cpp_lib_raw_memory_algorithms):
        Define.
        * include/std/any (__cpp_lib_any): Define as 201606L, because P0032R3
        changes are supported.
        * include/std/optional (__cpp_lib_optional): Likewise.
        * include/std/variant (__cpp_lib_variant): Likewise.
        * include/std/version [!__STRICT_ANSI__]
        (__cpp_lib_uncaught_exceptions): Define as long integer.
        [__cplusplus >= 201703L] (__cpp_lib_any)
        (__cpp_lib_raw_memory_algorithms, __cpp_lib_uncaught_exceptions)
        (__cpp_lib_variant): Define for C++17.
        [__cplusplus >= 201703L] (__cpp_lib_optional): Update value and define
        as long integer.
        * libsupc++/exception (__cpp_lib_uncaught_exceptions): Define as long
        integer.

        * doc/xml/manual/status_cxx2020.xml: Update P1123R0 status.

2019-01-12  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/88811
        PR libstdc++/83306
        * src/filesystem/path.cc: Fix typo. If first path is empty, show []
        before second path.
        * testsuite/experimental/filesystem/filesystem_error/cons.cc: New
        test.

2019-01-11  Jonathan Wakely  <jwakely@redhat.com>

        * doc/xml/manual/intro.xml: Include new section.
        * doc/xml/manual/status_cxx2017.xml: Document more
        implementation-defined properties of the library.
        * doc/xml/manual/status_cxx2020.xml: Document C++2a status.
        * doc/html/*: Regenerate.

        * include/bits/refwrap.h [__cplusplus > 201703L]
        (_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
        (_Reference_wrapper_base_memfun): Do not define for C++2a.
        (reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
        for C++2a.
        (reference_wrapper::operator()): Add static assertion.
        * testsuite/20_util/reference_wrapper/incomplete.cc: New test.

        * include/std/chrono (duration_values::zero(), duration_values::min())
        (duration_values::max()): Add noexcept.
        (duration::zero(), duration::min(), duration::max()): Likewise.
        (time_point::zero(), time_point::min(), time_point::max()): Likewise.
        * testsuite/20_util/duration/requirements/noexcept.cc: New test.
        * testsuite/20_util/time_point/requirements/noexcept.cc: New test.

        * include/std/version (__cpp_lib_erase_if): Move to C++20 group.

2019-01-11  Jakub Jelinek  <jakub@redhat.com>

        * include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
        * include/std/version (__cpp_lib_is_constant_evaluated): Define.

2019-01-11  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/88802
        * include/bits/functional_hash.h (hash<nullptr_t>): Define
        specialization for C++17 (P0513R0, LWG 2817).
        * testsuite/20_util/hash/nullptr.cc: New test.

        PR libstdc++/88125
        * config/abi/pre/gnu.ver (GLIBCXX_3.4.6): Remove unused duplicate
        pattern for std::basic_stringbuf::str().

        * config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
        basic_ostream::operator<< patterns.

2019-01-10  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/27_io/filesystem/operations/last_write_time.cc: Fix
        test failures on targets with 32-bit time_t.

        * include/bits/erase_if.h: Define __cpp_lib_erase_if.
        * include/std/deque: Likewise.
        * include/std/forward_list: Likewise.
        * include/std/list: Likewise.
        * include/std/string: Likewise.
        * include/std/vector: Likewise.
        * include/std/version: Likewise.
        * testsuite/21_strings/basic_string/erasure.cc: Test macro.
        * testsuite/23_containers/deque/erasure.cc: Likewise.
        * testsuite/23_containers/forward_list/erasure.cc: Likewise.
        * testsuite/23_containers/list/erasure.cc: Likewise.
        * testsuite/23_containers/map/erasure.cc: Likewise.
        * testsuite/23_containers/set/erasure.cc: Likewise.
        * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
        * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
        * testsuite/23_containers/vector/erasure.cc: Likewise.

        * include/experimental/internet [AI_NUMERICSERV]
        (resolver_base::numeric_service): Define conditionally.
        * testsuite/experimental/net/internet/resolver/base.cc: Test it
        conditionally.
        * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
        Likewise.

2019-01-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
            Jonathan Wakely  <jwakely@redhat.com>

        Implement LWG 2221
        * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten patterns.
        (GLIBCXX_3.4.26): Add new exports.
        * include/Makefile.am: Add ostream-inst.cc. Move string-inst.cc to
        correct list of sources.
        * include/Makefile.in: Regenerate.
        * include/std/ostream (operator<<(nullptr_t)): New member function.
        * src/c++17/ostream-inst.cc: New file.
        * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc: New
        test.

2019-01-10  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/util/testsuite_fs.h (nonexistent_path): Include name
        of the source file containing the caller.
        * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Remove
        directories created by test.
        * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
        Likewise.
        * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
        Likewise.
        * testsuite/experimental/filesystem/iterators/
        recursive_directory_iterator.cc: Likewise.

2019-01-10  Jakub Jelinek  <jakub@redhat.com>

        PR tree-optimization/88775
        * include/bits/stl_function.h (greater<_Tp*>::operator(),
        less<_Tp*>::operator(), greater_equal<_Tp*>::operator(),
        less_equal<_Tp*>::operator()): Use __builtin_is_constant_evaluated
        instead of __builtin_constant_p if available.  Don't bother with
        the pointer comparison in C++11 and earlier.

2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>

        PR other/16615

        * include/ext/bitmap_allocator.h: Mechanically replace "can not"
        with "cannot".

2019-01-09  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix expected output
        for filesystem::path. Give variables more distinctive names.

        * include/std/optional (_Optional_payload_base::_M_copy_assign): New
        member function to perform non-trivial assignment.
        (_Optional_payload_base::_M_move_assign): Likewise.
        (_Optional_payload<T, true, false, true>::operator=)
        (_Optional_payload<T, true, true, false>::operator=)
        (_Optional_payload<T, true, false, false>::operator=): Call
        _M_copy_assign and/or _M_move_assign to do non-trivial assignments.

        PR libstdc++/88204
        * testsuite/26_numerics/complex/operators/more_constexpr.cc: Do not
        test std::complex<long double> if long double format is IBM128.
        * testsuite/26_numerics/complex/requirements/more_constexpr.cc:
        Likewise.

2019-01-08  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/libstdc++-prettyprinters/compat.cc: Test printer support
        for old std::unique_ptr layout.
        * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix std::variant test
        to become valueless. Add filesystem::path tests.

        PR libstdc++/87855
        * include/std/optional (_Optional_payload_base): New class template
        for common code hoisted from _Optional_payload specializations. Use
        a template for the union, to allow a partial specialization for
        types with non-trivial destructors. Add constructors for in-place
        initialization to the union.
        (_Optional_payload(bool, const _Optional_payload&)): Use _M_construct
        to perform non-trivial copy construction, instead of relying on
        non-standard copy elision in a delegating constructor.
        (_Optional_payload(bool, _Optional_payload&&)): Likewise for
        non-trivial move construction.
        (_Optional_payload): Derive from _Optional_payload_base and use it
        for everything except the non-trivial assignment operators, which are
        defined as needed.
        (_Optional_payload<false, C, M>): Derive from the specialization
        _Optional_payload<true, false, false> and add a destructor.
        (_Optional_base_impl::_M_destruct, _Optional_base_impl::_M_reset):
        Forward to corresponding members of _Optional_payload.
        (_Optional_base_impl::_M_is_engaged, _Optional_base_impl::_M_get):
        Hoist common members from _Optional_base.
        (_Optional_base): Make all members and base class public.
        (_Optional_base::_M_get, _Optional_base::_M_is_engaged): Move to
        _Optional_base_impl.
        * python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Add
        support for new std::optional layout.
        * testsuite/libstdc++-prettyprinters/compat.cc: New test.

        PR libstdc++/88066
        * include/bits/locale_conv.h: Use <> for includes not "".
        * include/ext/random: Likewise.
        * include/ext/vstring.h: Likewise.

2019-01-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

        * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten existing patterns.
        (GLIBCXX_3.4.21): Likewise.

2019-01-08  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/88749
        * src/filesystem/ops.cc (last_write_time): Fix preprocessor condition
        to match the one that controls whether utimbuf and utime are declared.

2019-01-07  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/87787
        * include/bits/char_traits.h (char_traits::move): Do not pass null
        pointers to memmove.
        * include/bits/locale_facets.h
        (ctype<char>::widen(const char*, const char*, char*)): Do not
        pass null pointers to memcpy.
        (ctype<char>::narrow(const char*, const char*, char, char*)):
        Likewise.
        (ctype<char>::do_widen(const char*, const char*, char*)):
        Likewise.
        (ctype<char>::do_narrow(const char*, const char*, char, char*)):
        Likewise.

        * doc/xml/manual/spine.xml: Update copyright years.
        * doc/xml/manual/status_cxx2017.xml: Adjust note about -lstdc++fs.
        * doc/xml/manual/using.xml: Remove requirement to link with -lstdc++fs
        for C++17 filesystem library.
        * doc/html/*: Regenerate.

        * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
        * config.h.in: Regenerate.
        * config/abi/pre/gnu.ver: Order patterns for filesystem operations
        alphabetically and add missing entries for copy_symlink,
        hard_link_count, rename, and resize_file.
        * configure: Regenerate.
        * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
        used unconditionally.
        * src/filesystem/ops-common.h (__gnu_posix::truncate)
        [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
        supports truncating to zero length.
        * testsuite/27_io/filesystem/operations/all.cc: New test.
        * testsuite/27_io/filesystem/operations/resize_file.cc: New test.

2019-01-06  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/86756
        * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and
        lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT.
        * config.h.in: Regenerate.
        * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for
        remaining std::filesystem types and functions.
        * configure: Regenerate.
        * src/c++17/Makefile.am: Add C++17 filesystem sources.
        * src/c++17/Makefile.in: Regenerate.
        * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to
        here, and change name of included file.
        * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to
        here, and change name of included file.
        * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change
        path to dir-common.h.
        * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change
        path to ops-common.h. Disable -Wunused-parameter warnings.
        (internal_file_clock): Define unconditionally.
        [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not
        define.
        (do_copy_file, do_space): Move definitions to ops.common.h.
        (copy, file_size, hard_link_count, last_write_time, space): Only
        perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise
        report an error.
        (last_write_time, read_symlink): Remove unused attributes from
        parameters.
        * src/filesystem/Makefile.am: Remove C++17 filesystem sources.
        * src/filesystem/Makefile.in: Regenerate.
        * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc.
        * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc.
        * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc.
        * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc.
        * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define
        dummy types and functions instead of using #error.
        * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error.
        * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define
        in terms of stat.
        [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions.
        (do_copy_file, do_space): Move definitions here from std-ops.cc.
        * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space
        to account for new namespace.
        * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove
        -lstdc++fs from dg-options.
        * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise.
        * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
        * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
        * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
        * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
        Likewise.
        * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
        * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
        Likewise.
        * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
        * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
        * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
        * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
        * testsuite/27_io/filesystem/operations/create_directories.cc:
        Likewise.
        * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise.
        * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise.
        * testsuite/27_io/filesystem/operations/current_path.cc: Likewise.
        * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
        * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
        * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
        * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
        * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise.
        * testsuite/27_io/filesystem/operations/permissions.cc: Likewise.
        * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
        * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise.
        * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
        * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
        * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
        * testsuite/27_io/filesystem/operations/space.cc: Likewise.
        * testsuite/27_io/filesystem/operations/status.cc: Likewise.
        * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
        * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
        Likewise.
        * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise.


        PR libstdc++/86756
        * config/abi/pre/gnu.ver (GLIBCXX_3.4): Make various patterns for
        typeinfo and vtables less greedy.
        (GLIBCXX_3.4.26): Export symbols for std::filesystem::path.
        * src/c++17/Makefile.am: Add fs_path.cc and cow-fs_path.cc.
        * src/c++17/Makefile.in: Regenerate.
        * src/c++17/cow-fs_path.cc: Move src/filesystem/cow-std-path.cc to
        here, and change name of included file.
        * src/c++17/fs_path.cc: Move src/filesystem/std-path.cc to here.
        * src/filesystem/Makefile.am: Remove std-path.cc and cow-std-path.cc
        from sources.
        * src/filesystem/Makefile.in: Regenerate.
        * src/filesystem/cow-std-path.cc: Move to src/c++17/cow-fs_path.cc.
        * src/filesystem/std-path.cc: Move to src/c++17/fs_path.cc.
        * testsuite/27_io/filesystem/path/append/path.cc: Remove -lstdc++fs
        from dg-options and remove dg-require-filesystem-ts.
        * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
        * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
        * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
        * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
        * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
        * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
        * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
        * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
        * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
        * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
        * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
        * testsuite/27_io/filesystem/path/construct/default.cc: Likewise.
        * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
        * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
        * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
        * testsuite/27_io/filesystem/path/construct/string_view.cc: Likewise.
        * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise.
        * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise.
        * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise.
        * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise.
        * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
        Likewise.
        * testsuite/27_io/filesystem/path/decompose/root_name.cc: Likewise.
        * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise.
        * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
        * testsuite/27_io/filesystem/path/generation/normal.cc: Likewise.
        * testsuite/27_io/filesystem/path/generation/normal2.cc: Likewise.
        * testsuite/27_io/filesystem/path/generation/proximate.cc: Likewise.
        * testsuite/27_io/filesystem/path/generation/relative.cc: Likewise.
        * testsuite/27_io/filesystem/path/generic/generic_string.cc: Likewise.
        * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
        * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
        * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
        * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
        Likewise.
        * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
        Likewise.
        * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
        Likewise.
        * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
        Likewise.
        * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
        * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
        * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
        * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise.
        * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
        * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise.
        * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise.
        * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise.
        * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise.
        * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
        Likewise.
        * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise.
        * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise.
        * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
        * testsuite/27_io/filesystem/path/query/is_absolute.cc: Likewise.
        * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.

        PR libstdc++/87431
        * include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
        Check is_trivially_copyable instead of is_scalar.
        (variant::emplace<N, Args>(Args&&...)): If construction of the new
        contained value can throw and its type is trivially copyable then
        construct into a temporary variant and move from it, to provide the
        strong exception safety guarantee.
        (variant::emplace<N, U, Args>(initializer_list<U>, Args&&...)):
        Likewise.
        * testsuite/20_util/variant/87431.cc: New test.
        * testsuite/20_util/variant/run.cc: Adjust test so that throwing
        conversion causes valueless state.

        PR libstdc++/88607
        * testsuite/17_intro/headers/c++1998/charset.cc: New test.
        * testsuite/17_intro/headers/c++2011/charset.cc: New test.
        * testsuite/17_intro/headers/c++2014/charset.cc: New test.
        * testsuite/17_intro/headers/c++2017/charset.cc: New test.
        * testsuite/17_intro/headers/c++2020/charset.cc: New test.

2019-01-05  Jonathan Wakely  <jwakely@redhat.com>

        * include/bits/fs_fwd.h (__file_clock): Define new clock.
        (file_time_type): Redefine in terms of __file_clock.
        * src/filesystem/ops-common.h (file_time): Add FIXME comment about
        overflow.
        * src/filesystem/std-ops.cc (is_set(perm_options, perm_options)): Give
        internal linkage.
        (internal_file_lock): New helper type for accessing __file_clock.
        (do_copy_file): Use internal_file_lock to convert system time to
        file_time_type.
        (last_write_time(const path&, error_code&)): Likewise.
        (last_write_time(const path&, file_time_type, error_code&)): Likewise.

2019-01-04  Jonathan Wakely  <jwakely@redhat.com>

        * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make patterns less greedy
        for const member functions of std::basic_string.
        (GLIBCXX_3.4.26): Export member functions of std::basic_string added
        in C++17.
        * include/bits/basic_string.h (basic_string(__sv_wrapper, const A&)):
        Make non-standard constructor private.
        [!_GLIBCXX_USE_CXX11_ABI] (basic_string(__sv_wrapper, const A&)):
        Likewise.
        * include/bits/basic_string.tcc (std::string, std::wstring): Declare
        explicit instantiations for C++17 as well as earlier dialects.
        * src/c++17/Makefile.am: Add new source files.
        * src/c++17/Makefile.in: Regenerate.
        * src/c++17/cow-string-inst.cc: New file defining explicit
        instantiations for basic_string member functions added in C++17.
        * src/c++17/string-inst.cc: Likewise.

        * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export allocator-extended
        copy/move constructors for old std::basic_string.
        * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
        (basic_string::reference, basic_string::const_reference): Define
        as plain references for C++11 and later.
        (basic_string::basic_string()): Put constructor body outside
        preprocessor conditional groups.
        (basic_string::basic_string(basic_string&&)): Move _Alloc_hider
        instead of copying it.
        (basic_string::basic_string(const basic_string&, const _Alloc&)):
        Define.
        (basic_string::basic_string(basic_string&&, const _Alloc&)):
        Define.
        * include/bits/fs_path.h [!_GLIBCXX_USE_CXX11_ABI]: Remove special
        cases for old basic_string.
        * testsuite/21_strings/basic_string/cons/char/8.cc: Test
        allocator-extended constructors unconditionally. Add extra members to
        allocator type when using old string ABI.
        * testsuite/21_strings/basic_string/allocator/71964.cc: Enable test
        for old string ABI.
        * testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.

        * testsuite/23_containers/list/61347.cc: Avoid spurious failure when
        -fno-inline added to test flags.

        * testsuite/21_strings/basic_string/requirements/
        explicit_instantiation/debug.cc: Remove XFAIL for old ABI.

        * testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
        assertion failures with old std::string ABI.

        * include/bits/fs_path.h (path::_List::erase): Replace both overloads
        with ...
        (path::pop_back(), path::_M_erase_from(const_iterator)): New member
        functions that will only erase elements at the end.
        * src/filesystem/std-path.cc (path::_List::_Impl::pop_back()): Define.
        (path::_List::_Impl::_M_erase_from(const_iterator)): Define.
        (path::_List::operator=(const _List&)): Use _M_erase_from(p) instead
        of erase(p, end()).
        (path::_List::pop_back()): Define.
        (path::_List::_M_erase_from(const_iterator)): Define.
        (path::operator/=(const path&)): Use pop_back to remove last component
        and _M_erase_from to remove multiple components.
        (path::_M_append(basic_string_view<value_type>)): Likewise.
        (path::operator+=(const path&)): Likewise.
        (path::_M_concat(basic_string_view<value_type>)): Likewise.
        (path::remove_filename()): Likewise.
        (path::lexically_normal()): Use _List::_Impl iterators instead of
        path::iterator. Use pop_back to remove components from the end. Clear
        trailing filename, instead of using erase(const_iterator) to remove
        a non-final component.
        * testsuite/27_io/filesystem/path/generation/normal.cc: Test
        additional cases.
        * testsuite/27_io/filesystem/path/generation/normal2.cc: New test.

        * src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
        incorrect treatment of empty filename after trailing slash.
        * testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.

        * testsuite/21_strings/basic_string/modifiers/assign/char/
        move_assign_optim.cc: Avoid spurious failure when -fno-inline added
        to test flags.
        * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/
        move_assign_optim.cc: Likewise.

2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
            Jakub Jelinek  <jakub@redhat.com>

        PR libstdc++/88607
        * include/experimental/memory: Replace UTF-8 quote characters.
        * include/std/future: Replace UTF-8 "em dash" characters.

2019-01-03  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/88607
        * include/bits/forward_list.h: Replace UTF-8 "ligature fi" character.
        * include/debug/forward_list: Likewise.
        * include/experimental/bits/shared_ptr.h: Remove UTF-8 "section sign"
        character.
        * include/experimental/chrono: Likewise.
        * include/experimental/functional: Likewise.
        * include/experimental/ratio: Likewise.
        * include/experimental/system_error: Likewise.
        * include/experimental/tuple: Likewise.
        * include/experimental/type_traits: Likewise.
        * include/parallel/workstealing.h: Replace UTF-8 "en dash" character.
        * include/parallel/multiseq_selection.h: Likewise.

        PR libstdc++/88681
        * config/abi/pre/gnu.ver: Add missing exports.
        * testsuite/22_locale/collate_byname/88681.cc: New test.
        * testsuite/22_locale/time_get/get/char/88681.cc: New test.
        * testsuite/22_locale/time_get/get/wchar_t/88681.cc: New test.

2019-01-02  Jonathan Wakely  <jwakely@redhat.com>

        * testsuite/23_containers/map/cons/deduction.cc: Test deduction from
        initializer_list<value_type> and from input iterator ranges.
        * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.

        * testsuite/experimental/string_view/element_access/char/empty.cc:
        Fix year range in copyright header.

2019-01-02  Joel Brobecker  <brobecker@adacore.com>

        * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
        Fix year range in copyright header.

2019-01-01  Jakub Jelinek  <jakub@redhat.com>

        Update copyright years.
\f
Copyright (C) 2019 Free Software Foundation, Inc.

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.