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Reference

C library:
- <cassert> (assert.h)
- <cctype> (ctype.h)
- <cerrno> (errno.h)
- C++11
  <cfenv> (fenv.h)
- <cfloat> (float.h)
- C++11
  <cinttypes> (inttypes.h)
- <ciso646> (iso646.h)
- <climits> (limits.h)
- <clocale> (locale.h)
- <cmath> (math.h)
- <csetjmp> (setjmp.h)
- <csignal> (signal.h)
- <cstdarg> (stdarg.h)
- C++11
  <cstdbool> (stdbool.h)
- <cstddef> (stddef.h)
- C++11
  <cstdint> (stdint.h)
- <cstdio> (stdio.h)
- <cstdlib> (stdlib.h)
- <cstring> (string.h)
- C++11
  <ctgmath> (tgmath.h)
- <ctime> (time.h)
- C++11
  <cuchar> (uchar.h)
- <cwchar> (wchar.h)
- <cwctype> (wctype.h)
Containers:
- C++11
  <array>
- <deque>
- C++11
  <forward_list>
- <list>
- <map>
- <queue>
- <set>
- <stack>
- C++11
  <unordered_map>
- C++11
  <unordered_set>
- <vector>
Input/Output:
- <fstream>
- <iomanip>
- <ios>
- <iosfwd>
- <iostream>
- <istream>
- <ostream>
- <sstream>
- <streambuf>
Multi-threading:
- C++11
  <atomic>
- C++11
  <condition_variable>
- C++11
  <future>
- C++11
  <mutex>
- C++11
  <thread>
Other:
- <algorithm>
- <bitset>
- C++11
  <chrono>
- C++11
  <codecvt>
- <complex>
- <exception>
- <functional>
- C++11
  <initializer_list>
- <iterator>
- <limits>
- <locale>
- <memory>
- <new>
- <numeric>
- C++11
  <random>
- C++11
  <ratio>
- C++11
  <regex>
- <stdexcept>
- <string>
- C++11
  <system_error>
- C++11
  <tuple>
- C++11
  <type_traits>
- C++11
  <typeindex>
- <typeinfo>
- <utility>
- <valarray>

<utility>

classes
- pair
functions
- C++11
  declval
- C++11
  forward
- make_pair
- C++11
  move
- C++11
  move_if_noexcept
- C++11
  swap
types
- C++11
  piecewise_construct_t
constants
- C++11
  piecewise_construct
namespaces
- rel_ops

pair

pair::pair
member functions
- pair::operator=
- C++11
  pair::swap
non-member overloads
- C++11
  get (pair)
- relational operators (pair)
- C++11
  swap (pair)
non-member specializations
- C++11
  tuple_element<pair>
- C++11
  tuple_size<pair>

class template

std::pair

template <class T1, class T2> struct pair;

Pair of values

This class couples together a pair of values, which may be of different types (T1 and T2). The individual values can be accessed through its public members first and second.

Pairs are a particular case of tuple.

Template parameters

T1: Type of member first, aliased as first_type.
T2: Type of member second, aliased as second_type.

Member types

member type	definition	notes
`first_type`	The first template parameter (`T1`)	Type of member `first`.
`second_type`	The second template parameter (`T2`)	Type of member `second`.

Member variables

member variable	definition
`first`	The first value in the `pair`
`second`	The second value in the `pair`

Member functions

(constructor): Construct pair (public member function)

pair::operator=: Assign contents (public member function)

pair::swap: Swap contents (public member function)

Non-member function overloads

relational operators (pair): Relational operators for pair (function template)

swap (pair): Exchanges the contents of two pairs (function template)

get (pair): Get element (tuple interface) (function template)

Non-member class specializations

tuple_element<pair>: Tuple element type for pair (class template specialization)

tuple_size<pair>: Tuple traits for pair (class template specialization)

classes

functions

types

constants

namespaces

member functions

non-member overloads

non-member specializations