std::experimental::ranges:: Readable

From cppreference.com

Defined in header `<experimental/ranges/iterator>`
template < class In > concept bool Readable = requires { typename ranges :: value_type_t < In > ; typename ranges :: reference_t < In > ; typename ranges :: rvalue_reference_t < In > ; } && CommonReference < ranges :: reference_t < In > && , ranges :: value_type_t < In > & > && CommonReference < ranges :: reference_t < In > && , ranges :: rvalue_reference_t < In > && > && CommonReference < ranges :: rvalue_reference_t < In > && , const ranges :: value_type_t < In > & > ;		(ranges TS)

The concept Readable is satisfied by types that are readable by applying operator* , such as pointers, smart pointers, and iterators.

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