Understanding Range Concepts and Views

The term “range” refers to an abstraction that defines a sequence of elements bounded by start and end iterators. A range, therefore, represents an iterable sequence of elements. However, such a sequence can be defined in several ways:

• With a begin iterator and an end sentinel. Such a sequence is iterated from the beginning to the end. A sentinel is an object that indicates the end of the sequence. It can have the same type as the iterator type, or it can be of a different type.

• With a start object and a size (number of elements), representing a counted sequence. Such a sequence is iterated $N$ times (where $N$ ...