| Defined in header <utility> | ||
|---|---|---|
template< class T1, class T2 > std::pair<T1,T2> make_pair( T1 t, T2 u ); | (until C++11) | |
template< class T1, class T2 > std::pair<V1,V2> make_pair( T1&& t, T2&& u ); | (since C++11) (until C++14) | |
template< class T1, class T2 > constexpr std::pair<V1,V2> make_pair( T1&& t, T2&& u ); | (since C++14) |
Creates a std::pair object, deducing the target type from the types of arguments.
| The deduced types | (since C++11) |
Parameters
| t, u | - | the values to construct the pair from |
Return value
An std::pair object containing the given values.
Example
#include <iostream>
#include <utility>
#include <functional>
int main()
{
int n = 1;
int a[5] = {1, 2, 3, 4, 5};
// build a pair from two ints
auto p1 = std::make_pair(n, a[1]);
std::cout << "The value of p1 is "
<< "(" << p1.first << ", " << p1.second << ")\n";
// build a pair from a reference to int and an array (decayed to pointer)
auto p2 = std::make_pair(std::ref(n), a);
n = 7;
std::cout << "The value of p2 is "
<< "(" << p2.first << ", " << *(p2.second + 1) << ")\n";
}Output:
The value of p1 is (1, 2) The value of p2 is (7, 2)
Please login to continue.