std::get(std::pair) - cppreference.com

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# std::get(std::pair)

From cppreference.com
< cpp‎ | utility‎ | pair

| (1) |
template< size_t N, class T1, class T2 > typename std::tuple_element<I, std::pair<T1,T2> >::type& get( pair<T1, T2>& p ); | (1) | (since C++11) (until C++14)
template< size_t N, class T1, class T2 > constexpr typename std::tuple_element<I, std::pair<T1,T2> >::type& get( pair<T1, T2>& p ); | (1) | (since C++14)
| (2) |
template< size_t N, class T1, class T2 > const typename std::tuple_element<I, std::pair<T1,T2> >::type& get( const pair<T1,T2>& p ); | (2) | (since C++11) (until C++14)
template< size_t N, class T1, class T2 > constexpr const typename std::tuple_element<I, std::pair<T1,T2> >::type& get( const pair<T1,T2>& p ); | (2) | (since C++14)
| (3) |
template< size_t N, class T1, class T2 > typename std::tuple_element<I, std::pair<T1,T2> >::type&& get( std::pair<T1,T2>&& p ); | (3) | (since C++11) (until C++14)
template< size_t N, class T1, class T2 > constexpr typename std::tuple_element<I, std::pair<T1,T2> >::type&& get( std::pair<T1,T2>&& p ); | (3) | (since C++14)
template <class T, class U> constexpr T& get(std::pair<T, U>& p); template <class T, class U> constexpr const T& get(const std::pair<T, U>& p); | (4) | (since C++14)
template <class T, class U> constexpr T&& get(std::pair<T, U>&& p); | (5) | (since C++14)
template <class T, class U> constexpr T& get(std::pair<U, T>& p); template <class T, class U> constexpr const T& get(const std::pair<U, T>& p); | (6) | (since C++14)
template <class T, class U> constexpr T&& get(std::pair<U, T>&& p); | (7) | (since C++14)

Extracts an element from the pair using tuple-like interface.

Type-based overloads 4-7 fail to compile if the types `T` and `U` are the same.

### [edit] Parameters

p | - | pair whose contents to extract

### [edit] Return value

1,2) Returns `p.first` if `N==0` and `p.second` if `N==1`.
3) Returns std::forward<T1&&>(p.first) if `N==0` and std::forward<T2&&>(p.second) if `N==1`
4) Returns std::get<0>(p)
5) Returns std::get<0>(std::move(p))
6) Returns std::get<1>(p)
7) Returns std::get<1>(std::move(p))

### [edit] Exceptions

`noexcept` specification:
noexcept

### [edit] Example

Run this code

    #include <iostream>
    #include <utility>

    int main()
    {
        auto p = std::make_pair(1, 3.14);
        std::cout << '(' << std::get<0>(p) << ", " << std::get<1>(p) << ")\n";
        std::cout << '(' << std::get<int>(p) << ", " << std::get<double>(p) << ")\n";
    }

Output:

    (1, 3.14)
    (1, 3.14)

### [edit] See also

std::get(std::tuple) | tuple accesses specified element (function template) [edit]
std::get(std::array) | accesses an element of an `array` (function template) [edit]

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Category:

- unconditionally noexcept