std::experimental::ranges::reference_t,std::experimental::ranges::rvalue_reference_t, (3) - Linux Manuals

std::experimental::ranges::reference_t,std::experimental::ranges::rvalue_reference_t,: std::experimental::ranges::reference_t,std::experimental::ranges::rvalue_reference_t,

NAME

std::experimental::ranges::reference_t,std::experimental::ranges::rvalue_reference_t, - std::experimental::ranges::reference_t,std::experimental::ranges::rvalue_reference_t,

Synopsis

Defined in header <experimental/ranges/iterator>
template <class T>
concept bool /*dereferenceable*/ = requires(T& t) { {*t} -> auto&&;
}; // exposition only
template< /*dereferenceable*/ T >                                    (1) (ranges TS)
using reference_t = decltype(*declval<T&>());
template< /*dereferenceable*/ T >

requires requires(T& t) { { ranges::iter_move(t) } -> auto&&; }      (2) (ranges TS)

using rvalue_reference_t =
decltype(ranges::iter_move(declval<T&>()));
template< Readable T >

using iter_common_reference_t =                                      (3) (ranges TS)
ranges::common_reference_t<ranges::reference_t<T>,

ranges::value_type_t<T>&>;

1) Obtain the reference type of a dereferenceable type T.
2) Obtain the rvalue reference type of a dereferenceable type T, that is, the return
type of ranges::iter_move.
3) Compute a Readable type's common reference type. This is the common reference
type of its reference type and an lvalue reference to its value type.

Notes

The -> auto&& constraint checks that the type of the expression is not void.