std::move_iterator<Iter>::base

Since C++20

Returns the underlying iterator.

# Declarations

iterator_type base() const;

(constexpr since C++17) (until C++20)

constexpr const iterator_type& base() const& noexcept;

(since C++20)

constexpr iterator_type base() &&;

(since C++20)

# Example

#include <algorithm>
#include <iostream>
#include <iterator>
#include <vector>
 
int main()
{
    std::vector<int> v{0, 1, 2, 3, 4};
    std::move_iterator<std::vector<int>::reverse_iterator>
        m1{v.rbegin()},
        m2{v.rend()};
 
    std::copy(m1.base(), m2.base(), std::ostream_iterator<int>(std::cout, " "));
    std::cout << '\n';
}

# Defect reports

DR	Applied to	Behavior as published	Correct behavior
LWG 3391	C++20	overload (1) returned a copy of the underlying iterator	returns a reference
LWG 3593	C++20	overload (1) was not noexcept	made noexcept

# See also

operator*operator->