std::pair<T1,T2>::swap

void swap( pair& other ) noexcept(/* see below */);

constexpr void swap( pair& other ) noexcept(/* see below */);

constexpr void swap( const pair& other ) noexcept(/* see below */);

Swaps first with other.first and second with other.second, as if by using std::swap; swap(first, other.first); swap(second, other.second);.

Parameters

Return value

(none).

Exceptions

Example

#include <iostream>
#include <utility>
#include <string>
int main()
{
    std::pair<int, std::string> p1, p2;
    p1 = std::make_pair(10, "test");
    p2.swap(p1);
    std::cout << "(" << p2.first << ", " << p2.second << ")\n";
}

(10, test)

Defect reports

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

See also