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// forward_list::swap
#include <iostream>
#include <forward_list>
int main ()
{
std::forward_list<int> first = {10, 20, 30};
std::forward_list<int> second = {100, 200};
std::forward_list<int>::iterator it;
first.swap(second);
std::cout << "first contains:";
for (int& x: first) std::cout << ' ' << x;
std::cout << '\n';
std::cout << "second contains:";
for (int& x: second) std::cout << ' ' << x;
std::cout << '\n';
return 0;
}
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