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std::move_iterator<Iter>::base

	(1)
iterator_type base() const;		(since C++11) (until C++17)
constexpr iterator_type base() const;		(since C++17) (until C++20)
constexpr const iterator_type& base() const& noexcept;		(since C++20)
constexpr iterator_type base() &&;	(2)	(since C++20)

Returns the underlying base iterator.

1) Copy constructs the return value from the underlying iterator.	(until C++20)
1) Returns a reference to the underlying iterator.	(since C++20)

2) Move constructs the return value from the underlying iterator.

Parameters

(none).

Return value

1) A copy of the underlying iterator.	(until C++20)
1) A reference to the underlying iterator.	(since C++20)

2) An iterator move constructed from the underlying iterator.

Exceptions

May throw implementation-defined exceptions.

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';
}

Output:

4 3 2 1 0

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.