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std::counted_iterator<I>::operator*,-> - cppreference.com

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constexpr decltype(auto) operator*();
(1) (since C++20) 
constexpr decltype(auto) operator*() const
    requires /*dereferenceable*/<const I>;
(2) (since C++20) 
constexpr auto operator->() const noexcept
    requires std::contiguous_iterator<I>;
(3) (since C++20)

1,2) Returns a reference to the current element. Equivalent to return *current;.

If count() > 0 is false, the behavior is undefined.

(until C++26)

If count() > 0 is false:

(since C++26)

3) Returns a pointer to the current element. Equivalent to return std::to_address(current);.

Return value

Reference or pointer to the current element.

Example

#include <complex>
#include <iostream>
#include <iterator>

using std::operator""i;

int main()
{
    const auto il = {1.i, 2.i, 3.i, 4.i, 5.i};
    
    for (std::counted_iterator i{il.begin() + 1, 3}; i != std::default_sentinel; ++i)
        std::cout << *i << ' ';
    std::cout << '\n';
    
    for (std::counted_iterator i{il.begin() + 1, 3}; i != std::default_sentinel; ++i)
        std::cout << i->imag() << ' ';
    std::cout << '\n';
}

Output:

See also