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iter_swap(std::move_iterator) - cppreference.com

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template< std::indirectly_swappable<Iter> Iter2 > friend constexpr void iter_swap( const move_iterator& x, const std::move_iterator<Iter2>& y ) noexcept(/* see below */);

 (since C++20)

Swaps the objects pointed to by two underlying iterators.

Equivalent to ranges::iter_swap(x.base(), y.base());.

This function template is not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when std::move_iterator<Iter> is an associated class of the arguments.

Parameters

x, y - move iterators to the elements to swap

Complexity

Constant.

Exceptions

noexcept

specification:

noexcept(noexcept(ranges::iter_swap(x.base(), y.base())))

Example

#include <iostream>
#include <iterator>
#include <string>
#include <vector>

int main()
{
    std::vector<std::string> p{"AA", "EE"},
                             q{"ⱯⱯ", "ƎƎ"};
    
    std::move_iterator<std::vector<std::string>::iterator>
        x = std::make_move_iterator(p.begin()),
        y = std::make_move_iterator(q.begin());
    
    std::cout << *x << ' ' << *y << '\n';
    
    iter_swap(x, y); // ADL
    
    std::cout << *x << ' ' << *y << '\n';
}

Output:

See also

swaps the values of two objects
(function template) [edit]
swaps two ranges of elements
(function template) [edit]
swaps the elements pointed to by two iterators
(function template) [edit]
swaps the values referenced by two dereferenceable objects
(customization point object)[edit]
swaps the objects pointed to by two adjusted underlying iterators
(function template) [edit]