How do I initialize a const std::pair ?

Question

Let's say that I've got a :

#include <utility>
using namespace std;
typedef pair<int, int> my_pair;

how do I initialize a const my_pair ?

Answer 1

Use its constructor:

const my_pair p( 1, 2 );

Answer 2

const my_pair p = my_pair(3, 2);

Answer 3

const my_pair p = std::make_pair( 2, 3);