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

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< cpp‎ | experimental‎ | ranges
 
 
Technical specifications
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
reference_trvalue_reference_titer_common_reference_t
Iterator adaptors
Stream iterators
 
template <class T>
concept bool /*dereferenceable*/ = requires(T& t) { {*t} -> auto&&; };  // exposition only
template< /*dereferenceable*/ T >
using reference_t = decltype(*declval<T&>());
(1) (ranges TS)
template< /*dereferenceable*/ T >

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

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

using iter_common_reference_t = ranges::common_reference_t<ranges::reference_t<T>,

                                                           ranges::value_type_t<T>&>;
(3) (ranges TS)
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.