std::experimental::ranges:: Range

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.