Defined in header
template < class T >
concept bool 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.