22 Iterators library [iterators]

22.5 Iterator adaptors [predef.iterators]

22.5.6 Counted iterators [iterators.counted]

22.5.6.3 Accessors [counted.iter.access]

constexpr I base() const;
Effects: Equivalent to: return current;
constexpr iter_difference_t<I> count() const noexcept;
Effects: Equivalent to: return length;