#include <cassert>
#include <iostream>
#include <list>
#include <string>
#include <vector>

int main()
{
    std::vector<int> v { 1, 2, 3 };

    assert(v.front() == 1);
    prepend(v, 0);
    assert(v.front() == 0);
    
    std::list<float> d { 1.2f, 3.45f, 67.8f, 9.0f };

    assert(d.front() == 1.2f);
    prepend(d, 0);
    assert(d.front() == 0.0f);

    std::string s { "ello world!" };

    assert(s.front() == 'e');
    prepend(s, 'H');
    assert(s.front() == 'H');
}