std::tuple_element<std::pair>

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C++ Standard Library
Language Utilities library Strings library Containers library Algorithms library Iterators library Numerics library Input/output library Localizations library Regular expressions library (C++11) Atomic operations library (C++11) Thread support library (C++11)
Utilities library
Type support (basic types, RTTI, type traits) Dynamic memory management Error handling Program utilities Compile-time rational arithmetic (C++11) Date and time Function objects initializer_list (C++11) bitset hash (C++11) Relational operators rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>= Pairs and tuples pair tuple (C++11) piecewise_construct_t (C++11) piecewise_construct (C++11) Swap, forward and move swap forward (C++11) move (C++11) move_if_noexcept (C++11) declval (C++11)
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)

Defined in header <utility>
template< class T1, class T2 > struct tuple_element<0, std::pair<T1,T2> >;	(1)	(C++11 feature)
template< class T1, class T2 > struct tuple_element<1, std::pair<T1,T2> >;	(2)	(C++11 feature)

The partial specializations of std::tuple_element for pairs provide a compile-time way to obtain the types of the pair's elements, using tuple-like syntax.

Contents 1 Member types 1.1 First version 1.2 Second version 2 Example 3 See also

[edit] Member types

First version
Member type	Definition
type	T1
Second version
Member type	Definition
type	T2

[edit] Example

This section is incomplete

[edit] See also

tuple_size (C++11)	obtains the size of a pair (class template specialization)