std:: swap (std::set)

Specializes the std::swap algorithm for std::set . Swaps the contents of lhs and rhs . Calls lhs. swap ( rhs ) .

Parameters

Return value

(none)

Complexity

Constant.

Exceptions

Example

#include <algorithm>
#include <iostream>
#include <set>
 
int main()
{
    std::set<int> alice{1, 2, 3};
    std::set<int> bob{7, 8, 9, 10};
 
    auto print = [](const int& n) { std::cout << ' ' << n; };
 
    // Print state before swap
    std::cout << "Alice:";
    std::for_each(alice.begin(), alice.end(), print);
    std::cout << "\nBobby:";
    std::for_each(bob.begin(), bob.end(), print);
    std::cout << '\n';
 
    std::cout << "-- SWAP\n";
    std::swap(alice, bob);
 
    // Print state after swap
    std::cout << "Alice:";
    std::for_each(alice.begin(), alice.end(), print);
    std::cout << "\nBobby:";
    std::for_each(bob.begin(), bob.end(), print);
    std::cout << '\n';
}

Alice: 1 2 3
Bobby: 7 8 9 10
-- SWAP
Alice: 7 8 9 10
Bobby: 1 2 3

See also