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 ?

Doralynn

Answer 1

Use its constructor:

const my_pair p( 1, 2 );

Alicea

Answer 2

With C++11 you can also use one of the following:

const my_pair p = {2, 3};
const my_pair p({2, 3});
const my_pair p{2, 3};

Medical

Answer 3

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

Allowed

Answer 4

const my_pair p = my_pair(3, 2);

Teofilateosinte

Answer 5

Although this post is quite old, I encountered the same problem today and managed to resolve it as follows. I hope it will be helpful for others.

const std::array<const std::pair<std::string, int>, argument_no> infoArr = {std::make_pair("start_year", 0), std::make_pair("end_year", 0)};

Dealings