std::experimental::ranges::Range

Defined in header `<experimental/ranges/range>`
template< class T > concept bool Range = requires(T&& t) { ranges::begin(t); /* not necessarily equality-preserving (see below) */ ranges::end(t); };		(ranges TS)

Given an lvalue t of type std::remove_reference_t<T>, Range<T> is satisfied only if

[ranges::begin(t), ranges::end(t)) denotes a range; and
both ranges::begin(t) and ranges::end(t) are amortized constant time and non-modifying.
If ranges::iterator_t<T> satisfies ForwardIterator, ranges::begin(t) is equality preserving.