std::experimental::ranges::reference_t, std::experimental::ranges::rvalue_reference_t, std::experimental::ranges::iter_common_reference_t
From cppreference.com
< cpp | experimental | ranges
C++
Feature test macros (C++20)
Concepts library (C++20)
Metaprogramming library (C++11)
Ranges library (C++20)
Filesystem library (C++17)
Concurrency support library (C++11)
Execution control library (C++26)
Experimental
Filesystem library (filesystem TS)
Library fundamentals (library fundamentals TS)
Library fundamentals 2 (library fundamentals TS v2)
Library fundamentals 3 (library fundamentals TS v3)
Extensions for parallelism (parallelism TS)
Extensions for parallelism 2 (parallelism TS v2)
Extensions for concurrency (concurrency TS)
Extensions for concurrency 2 (concurrency TS v2)
Concepts (concepts TS)
Ranges (ranges TS)
Reflection (reflection TS)
Mathematical special functions (special functions TR)
Iterators library
Iterator concepts
Indirect callable concepts
Common algorithm requirements
Concept utilities
Iterator utilities and operations
Iterator traits
Iterator adaptors
Stream iterators
Defined in header
<experimental/ranges/iterator>
template< class T >
concept bool /*dereferenceable*/ = requires(T& t) { {*t} -> auto&&; };
(exposition only*)
concept bool /*dereferenceable*/ = requires(T& t) { {*t} -> auto&&; };
template< /*dereferenceable*/ T >
using reference_t = decltype(*declval<T&>());
(1)
(ranges TS)
using reference_t = decltype(*declval<T&>());
template< /*dereferenceable*/ T >
(2)
(ranges TS)
requires requires(T& t) { { ranges::iter_move (t) } -> auto&&; }
template< Readable T >
(3)
(ranges TS)
using iter_common_reference_t = ranges::common_reference_t <ranges::reference_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.[edit] Notes
The -> auto&& constraint checks that the type of the expression is not void.