std::get(std::pair)

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C++ Standard Library
Utilities library
std::pair
Member functions
pair::pair
pair::operator=
pair::swap
Non-member functions
make_pair
operator=
operator!=
operator<
operator<=
operator>
operator>=
std::swap
get (C++11)
Helper classes
tuple_size (C++11)
tuple_element (C++11)
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)
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)
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)

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

Contents

[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

[edit] Exceptions

1-3)
noexcept specification:  
noexcept
  (since C++11)

[edit] Example 

#include <iostream>
#include <utility>
 
int main()
{
    auto p = std::make_pair(1, 3.14);
    std::cout << '(' << std::get<0>(p) << ", " << std::get<1>(p) << ')' << std::endl;
}

Output: 

(1, 3.14)


[edit] See also

accesses specified element
(function template)
accesses an element of an array
(function template)
Retrieved from "http://en.cppreference.com/w/cpp/utility/pair/get"