* include/std/variant (visit): Make visit constexpr. Also cleanup
__get_alternative and __storage, since we don't support reference/void
alternatives any more.
* testsuite/20_util/variant/compile.cc: Add tests.
From-SVN: r243295
The convertible_to traits need to use a variadic catch-all for the
false-cases.
* include/std/istream (__is_convertible_to_basic_istream):
Change the parameter of the false-case of __check to a variadic.
* include/std/ostream (__is_convertible_to_basic_ostream):
Likewise.
From-SVN: r243098
* include/std/istream (__is_convertible_to_basic_istream):
Change the return types of __check, introduce istream_type.
(operator>>(_Istream&&, _Tp&&)):
Use __is_convertible_to_basic_istream::istream_type as the return type.
* include/std/ostream (__is_convertible_to_basic_ostream):
Change the return types of __check, introduce ostream_type.
(operator>>(_Ostream&&, _Tp&&)):
Use __is_convertible_to_basic_ostream::ostream_type as the return type.
From-SVN: r243036
* doc/xml/manual/intro.xml: Document LWG 2770 status. Remove entries
for 2742 and 2748.
* doc/html/*: Regenerate.
* include/std/utility (__tuple_size_cv_impl): New helper to safely
detect tuple_size<T>::value, as per LWG 2770.
(tuple_size<cv T>): Adjust partial specializations to derive from
__tuple_size_cv_impl.
* testsuite/20_util/tuple/cv_tuple_size.cc: Test SFINAE-friendliness.
From-SVN: r242452
* include/std/variant: Remove variant<T&>, variant<void>, variant<> support
to rebase on the post-Issaquah design.
* testsuite/20_util/variant/compile.cc: Likewise.
From-SVN: r242437
* doc/xml/manual/intro.xml: Document LWG 2748 status.
* include/std/optional (optional<T>::swap): Use is_nothrow_swappable_v
for exception specification.
(swap(optional<T>&, optional<T>&)): Disable when T is not swappable.
* testsuite/20_util/optional/swap/2.cc: New test.
From-SVN: r242415
Implement P0504R0 (Revisiting in-place tag types for
any/optional/variant).
* include/std/any (any(_ValueType&& __value)): Constrain
the __is_in_place_type with the decayed type.
(make_any): Adjust to use the new tag type.
* include/std/utility (in_place_tag): Remove.
(in_place_t): Turn into a non-reference tag type.
(__in_place, __in_place_type, __in_place_index): Remove.
(in_place): Turn into an inline variable of non-reference
tag type.
(in_place<_Tp>): Remove.
(in_place_index<_Idx>): Remove.
(in_place_type_t): New.
(in_place_type): Turn into a variable template of non-reference
type.
(in_place_index_t): New.
(in_place_index): Turn into a variable template of non-reference
type.
* include/std/variant
(_Variant_storage(in_place_index_t<_Np>, _Args&&...)): Adjust to
use the new tag type.
(_Union(in_place_index_t<0>, _Args&&...)): Likewise.
(_Union(in_place_index_t<_Np>, _Args&&...)): Likewise.
(_Variant_base()): Likewise.
(variant(_Tp&&)): Likewise.
(variant(in_place_type_t<_Tp>, _Args&&...)): Likewise.
(variant(in_place_type_t<_Tp>, initializer_list<_Up>,
_Args&&...)): Likewise.
(variant(in_place_index_t<_Np>, _Args&&...)): Likewise.
(variant(in_place_index_t<_Np>, initializer_list<_Up>,
_Args&&...)): Likewise
(variant(allocator_arg_t, const _Alloc&)): Likewise.
(variant(allocator_arg_t, const _Alloc&, _Tp&&)): Likewise.
(variant(allocator_arg_t, const _Alloc&, in_place_type_t<_Tp>,
_Args&&...)): Likewise.
(variant(allocator_arg_t, const _Alloc&, in_place_type_t<_Tp>,
initializer_list<_Up>, _Args&&...)): Likewise.
(variant(allocator_arg_t, const _Alloc&, in_place_index_t<_Np>,
_Args&&...)): Likewise.
(variant(allocator_arg_t, const _Alloc&, in_place_index_t<_Np>,
initializer_list<_Up>, _Args&&...)): Likewise.
(emplace(_Args&&...)): Likewise.
(emplace(initializer_list<_Up>, _Args&&...)): Likewise.
* testsuite/20_util/any/cons/explicit.cc: Likewise.
* testsuite/20_util/any/cons/in_place.cc: Likewise.
* testsuite/20_util/any/requirements.cc: Add tests to
check that any is not constructible from the new in_place_type_t
of any value category.
* testsuite/20_util/in_place/requirements.cc: Adjust to
use the new tag type.
* testsuite/20_util/variant/compile.cc: Likewise.
* testsuite/20_util/variant/run.cc: Likewise.
From-SVN: r242401
not in the template parameters.
* include/std/optional (operator=(_Up&&)): Move SFINAE
from template parameters to the return type.
(operator=(const optional<_Up>&)): Likewise.
(operator=(optional<_Up>&&)): Likewise.
From-SVN: r241372
* include/std/scoped_allocator (scoped_allocator_adaptor): Forward
piecewise construction arguments as tuples of references, to avoid
copies (related to LWG 2511).
* testsuite/20_util/scoped_allocator/construct_pair.cc: New test.
From-SVN: r241169
* include/std/functional (_Reference_wrapper_base_impl): Remove.
(_Refwrap_base_arg1, _Refwrap_base_arg2): New helpers using __void_t.
(_Reference_wrapper_base): Inherit from new helpers.
From-SVN: r241151
* include/std/functional (_Bind_simple, _Bind_simple_helper)
(__bind_simple): Remove.
* include/std/future: Include <bits/invoke.h> instead of <functional>.
(__future_base::_Task_state::_M_run)
(__future_base::_Task_state::_M_run_delayed): Use lambda expressions
instead of __bind_simple.
(__future_base::_Task_state::_S_maybe_wrap_ref): Remove.
(async): Use thread::__make_invoker instead of __bind_simple.
* include/std/thread: Include <tuple> and <bits/invoke.h> instead of
<functional>.
(thread::_Invoker, thread::__make_invoker): Define helpers to do
INVOKE(DECAY_COPY(f), DECAY_COPY(args)...).
From-SVN: r241093
* include/std/functional (_Not_fn): Make exception specifications
depend on whether negating the result can throw.
* testsuite/20_util/not_fn/1.cc: Move to ...
* testsuite/20_util/function_objects/not_fn/1.cc: ... here. Add tests
for types that can throw when negated and that cannot be negated.
From-SVN: r241091
* doc/xml/manual/intro.xml: Document LWG 2442 status.
* include/std/mutex [_GLIBCXX_HAVE_TLS] (__once_call_impl): Remove.
[_GLIBCXX_HAVE_TLS] (_Once_call): Declare primary template and define
partial specialization to unpack args and forward to std::invoke.
(call_once) [_GLIBCXX_HAVE_TLS]: Use forward_as_tuple and _Once_call
instead of __bind_simple and __once_call_impl.
(call_once) [!_GLIBCXX_HAVE_TLS]: Use __invoke instead of
__bind_simple.
* testsuite/30_threads/call_once/dr2442.cc: New test.
From-SVN: r241031
don't copy the underlying value when any is moved,
make in_place constructors explicit.
* include/std/any (any(in_place_type_t<_ValueType>, _Args&&...)):
Make explicit.
(any(in_place_type_t<_ValueType>, initializer_list<_Up>, _Args&&...)):
Likewise.
(operator=(const any&)): Make strongly exception-safe.
(operator=(any&&)): reset() unconditionally in the case where
rhs has a value.
(operator=(_ValueType&&)): Indent the return type.
(_Manager_internal<_Tp>::_S_manage): Move in _Op_xfer, don't copy.
* testsuite/20_util/any/assign/2.cc: Adjust.
* testsuite/20_util/any/assign/exception.cc: New.
* testsuite/20_util/any/cons/2.cc: Adjust.
* testsuite/20_util/any/cons/explicit.cc: New.
* testsuite/20_util/any/misc/any_cast_neg.cc: Ajust.
From-SVN: r240951
* include/std/functional (_Bind_result::__enable_if_void): Use alias
template instead of class template.
(_Bind_result::__disable_if_void): Likewise.
(_Bind_result::__call): Adjust uses of __enable_if_void and
__disable_if_void.
From-SVN: r240940
* doc/xml/manual/status_cxx2011.xml: Update status.
* include/std/scoped_allocator (__outer_allocator_t, __outermost_type):
New helpers for recursive OUTERMOST.
(__outermost): Use __outermost_type::_S_outermost.
(__do_outermost, scoped_allocator_adaptor::__outermost_type): Remove.
(scoped_allocator_adaptor::__outermost_alloc_traits): Use new
__outermost_type helper.
* testsuite/20_util/scoped_allocator/outermost.cc: New test.
From-SVN: r240844
PR libstdc++/70564
* include/experimental/functional (_Not_fn): Remove.
(not_fn): Use std::_Not_fn.
* include/std/functional (_Not_fn): Add second parameter to
disambiguate copying from initialization by not_fn. Define for C++14.
(not_fn): Add second argument to initialization.
* testsuite/20_util/not_fn/1.cc: Copy call wrapper using
direct-initialization.
From-SVN: r240778
Make optional::reset noexcept, make optional::value
work in constant expressions.
* include/std/optional (_M_get): Make constexpr.
(reset): Make noexcept.
* testsuite/20_util/optional/assignment/7.cc: New.
* testsuite/20_util/optional/observers/6.cc: New.
From-SVN: r240623
Tim Shen