Поиск элемента в queue

std::queue<int> f;
f._Get_container();

#include <iostream>
#include <vector>
#include <list>
#include <queue>
#include <deque>
#include <algorithm>
#include <iterator>
 
template<typename T, typename Cont, typename FwdIter>
void queue_to_container(const std::queue<T, Cont>& q, FwdIter iter)
{
    typedef T value_type;
    
    std::queue<T> copy_q = q;
    
    while (!copy_q.empty())
    {
        *iter++ = copy_q.front();
        
        copy_q.pop();
    }
}
 
int main()
{
    std::queue<int> q;
    
    q.push(10);
    q.push(20);
    q.push(30);
    
    std::vector<int> vec(3);
    
    queue_to_container(q, vec.begin());
    
    std::list<int> lst;
    
    queue_to_container(q, std::back_inserter(lst));
    
    std::cout << "Vector: ";
    std::copy(vec.begin(), vec.end(), std::ostream_iterator<int>(std::cout, "  "));
    std::cout << std::endl;
    
    std::cout << "List: ";
    std::copy(lst.begin(), lst.end(), std::ostream_iterator<int>(std::cout, "  "));
    std::cout << std::endl;
    
    std::cout << "Queue: ";
    std::cout << q.front() << "  ";
    q.pop();
    std::cout << q.front() << "  ";
    q.pop();
    std::cout << q.front() << std::endl;
    q.pop();
    
    return 0;
}