Provided by: libstdc++-9-doc_9.5.0-3ubuntu1_all 
NAME
std::pair< _T1, _T2 > - Struct holding two objects of arbitrary type.
SYNOPSIS
#include <stl_pair.h>
Inherits std::__pair_base< _U1, _U2 >.
Public Types
template<typename _U1 , typename _U2 > using _PCCFP = _PCC<!is_same< _T1, _U1
>::value||!is_same< _T2, _U2 >::value, _T1, _T2 >
using _PCCP = _PCC< true, _T1, _T2 >
typedef _T1 first_type
typedef _T2 second_type
first_type is the first bound type
Public Member Functions
template<typename _U1 = _T1, typename _U2 = _T2, typename enable_if< __and_<
__is_implicitly_default_constructible< _U1 >, __is_implicitly_default_constructible<
_U2 > > ::value, bool >::type = true> constexpr pair ()
second is a copy of the second object
template<typename _U1 , typename _U2 , typename enable_if< _PCCP::template
_MoveConstructiblePair< _U1, _U2 >() &&_PCCP::template _ImplicitlyMoveConvertiblePair<
_U1, _U2 >(), bool >::type = true> constexpr pair (_U1 &&__x, _U2 &&__y)
template<typename _U1 , typename _U2 , typename enable_if< _PCCP::template
_MoveConstructiblePair< _U1, _U2 >() &&!_PCCP::template
_ImplicitlyMoveConvertiblePair< _U1, _U2 >(), bool >::type = false> constexpr pair
(_U1 &&__x, _U2 &&__y)
template<typename _U1 , typename enable_if< _PCCP::template _MoveCopyPair< true, _U1, _T2
>(), bool >::type = true> constexpr pair (_U1 &&__x, const _T2 &__y)
template<typename _U1 , typename enable_if< _PCCP::template _MoveCopyPair< false, _U1, _T2
>(), bool >::type = false> constexpr pair (_U1 &&__x, const _T2 &__y)
template<typename _U1 = _T1, typename _U2 = _T2, typename enable_if< _PCCP::template
_ConstructiblePair< _U1, _U2 >() &&_PCCP::template _ImplicitlyConvertiblePair< _U1,
_U2 >(), bool >::type = true> constexpr pair (const _T1 &__a, const _T2 &__b)
template<typename _U1 = _T1, typename _U2 = _T2, typename enable_if< _PCCP::template
_ConstructiblePair< _U1, _U2 >() &&!_PCCP::template _ImplicitlyConvertiblePair< _U1,
_U2 >(), bool >::type = false> constexpr pair (const _T1 &__a, const _T2 &__b)
template<typename _U2 , typename enable_if< _PCCP::template _CopyMovePair< true, _T1, _U2
>(), bool >::type = true> constexpr pair (const _T1 &__x, _U2 &&__y)
template<typename _U2 , typename enable_if< _PCCP::template _CopyMovePair< false, _T1, _U2
>(), bool >::type = false> pair (const _T1 &__x, _U2 &&__y)
constexpr pair (const pair &)=default
template<typename _U1 , typename _U2 , typename enable_if< _PCCFP< _U1, _U2 >::template
_ConstructiblePair< _U1, _U2 >() &&_PCCFP< _U1, _U2 >::template
_ImplicitlyConvertiblePair< _U1, _U2 >(), bool >::type = true> constexpr pair (const
pair< _U1, _U2 > &__p)
template<typename _U1 , typename _U2 , typename enable_if< _PCCFP< _U1, _U2 >::template
_ConstructiblePair< _U1, _U2 >() &&!_PCCFP< _U1, _U2 >::template
_ImplicitlyConvertiblePair< _U1, _U2 >(), bool >::type = false> constexpr pair (const
pair< _U1, _U2 > &__p)
constexpr pair (pair &&)=default
template<typename _U1 , typename _U2 , typename enable_if< _PCCFP< _U1, _U2 >::template
_MoveConstructiblePair< _U1, _U2 >() &&_PCCFP< _U1, _U2 >::template
_ImplicitlyMoveConvertiblePair< _U1, _U2 >(), bool >::type = true> constexpr pair
(pair< _U1, _U2 > &&__p)
template<typename _U1 , typename _U2 , typename enable_if< _PCCFP< _U1, _U2 >::template
_MoveConstructiblePair< _U1, _U2 >() &&!_PCCFP< _U1, _U2 >::template
_ImplicitlyMoveConvertiblePair< _U1, _U2 >(), bool >::type = false> constexpr pair
(pair< _U1, _U2 > &&__p)
template<typename... _Args1, typename... _Args2> pair (piecewise_construct_t, tuple<
_Args1... >, tuple< _Args2... >)
template<typename _U1 , typename _U2 > enable_if< __and_< is_assignable< _T1 &, const_U1 &
>, is_assignable< _T2 &, const_U2 & > >::value, pair & >::type operator= (const pair<
_U1, _U2 > &__p)
template<typename _U1 , typename _U2 > enable_if< __and_< is_assignable< _T1 &, _U1 && >,
is_assignable< _T2 &, _U2 && > >::value, pair & >::type operator= (pair< _U1, _U2 >
&&__p)
pair & operator= (typename conditional< __and_< is_copy_assignable< _T1 >,
is_copy_assignable< _T2 > >::value, const pair &, const __nonesuch_no_braces & >::type
__p)
pair & operator= (typename conditional< __and_< is_move_assignable< _T1 >,
is_move_assignable< _T2 > >::value, pair &&, __nonesuch_no_braces && >::type __p)
noexcept(__and_< is_nothrow_move_assignable< _T1 >, is_nothrow_move_assignable< _T2 >
>::value)
void swap (pair &__p) noexcept(__and_< __is_nothrow_swappable< _T1 >,
__is_nothrow_swappable< _T2 > >::value)
Public Attributes
_T1 first
second_type is the second bound type
_T2 second
first is a copy of the first object
Detailed Description
template<typename _T1, typename _T2>
struct std::pair< _T1, _T2 >"Struct holding two objects of arbitrary type.
Template Parameters
_T1 Type of first object.
_T2 Type of second object.
Definition at line 208 of file stl_pair.h.
Member Typedef Documentation
template<typename _T1 , typename _T2 > template<typename _U1 , typename _U2 > using std::pair<
_T1, _T2 >::_PCCFP = _PCC<!is_same<_T1, _U1>::value || !is_same<_T2, _U2>::value, _T1,
_T2>
There is also a templated copy ctor for the pair class itself.
Definition at line 281 of file stl_pair.h.
template<typename _T1 , typename _T2 > using std::pair< _T1, _T2 >::_PCCP = _PCC<true, _T1,
_T2>
Two objects may be passed to a pair constructor to be copied.
Definition at line 252 of file stl_pair.h.
template<typename _T1 , typename _T2 > typedef _T1 std::pair< _T1, _T2 >::first_type
Definition at line 211 of file stl_pair.h.
template<typename _T1 , typename _T2 > typedef _T2 std::pair< _T1, _T2 >::second_type
first_type is the first bound type
Definition at line 212 of file stl_pair.h.
Constructor & Destructor Documentation
template<typename _T1 , typename _T2 > template<typename _U1 = _T1, typename _U2 = _T2,
typename enable_if< __and_< __is_implicitly_default_constructible< _U1 >,
__is_implicitly_default_constructible< _U2 > > ::value, bool >::type = true> constexpr
std::pair< _T1, _T2 >::pair () [inline], [constexpr]
second is a copy of the second object The default constructor creates first and second
using their respective default constructors.
Definition at line 229 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U1 = _T1, typename _U2 = _T2,
typename enable_if< __and_< is_default_constructible< _U1 >, is_default_constructible< _U2
>, __not_< __and_< __is_implicitly_default_constructible< _U1 >,
__is_implicitly_default_constructible< _U2 > > > > ::value, bool >::type = false>
constexpr std::pair< _T1, _T2 >::pair () [inline], [explicit], [constexpr]
Definition at line 242 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U1 = _T1, typename _U2 = _T2,
typename enable_if< _PCCP::template _ConstructiblePair< _U1, _U2 >() &&_PCCP::template
_ImplicitlyConvertiblePair< _U1, _U2 >(), bool >::type = true> constexpr std::pair< _T1,
_T2 >::pair (const _T1 & __a, const _T2 & __b) [inline], [constexpr]
Definition at line 260 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U1 = _T1, typename _U2 = _T2,
typename enable_if< _PCCP::template _ConstructiblePair< _U1, _U2 >() &&!_PCCP::template
_ImplicitlyConvertiblePair< _U1, _U2 >(), bool >::type = false> constexpr std::pair< _T1,
_T2 >::pair (const _T1 & __a, const _T2 & __b) [inline], [explicit], [constexpr]
Definition at line 269 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U1 , typename _U2 , typename
enable_if< _PCCFP< _U1, _U2 >::template _ConstructiblePair< _U1, _U2 >() &&_PCCFP< _U1,
_U2 >::template _ImplicitlyConvertiblePair< _U1, _U2 >(), bool >::type = true> constexpr
std::pair< _T1, _T2 >::pair (const pair< _U1, _U2 > & __p) [inline], [constexpr]
Definition at line 291 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U1 , typename _U2 , typename
enable_if< _PCCFP< _U1, _U2 >::template _ConstructiblePair< _U1, _U2 >() &&!_PCCFP< _U1,
_U2 >::template _ImplicitlyConvertiblePair< _U1, _U2 >(), bool >::type = false> constexpr
std::pair< _T1, _T2 >::pair (const pair< _U1, _U2 > & __p) [inline], [explicit],
[constexpr]
Definition at line 300 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U1 , typename enable_if<
_PCCP::template _MoveCopyPair< true, _U1, _T2 >(), bool >::type = true> constexpr
std::pair< _T1, _T2 >::pair (_U1 && __x, const _T2 & __y) [inline], [constexpr]
Definition at line 311 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U1 , typename enable_if<
_PCCP::template _MoveCopyPair< false, _U1, _T2 >(), bool >::type = false> constexpr
std::pair< _T1, _T2 >::pair (_U1 && __x, const _T2 & __y) [inline], [explicit],
[constexpr]
Definition at line 318 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U2 , typename enable_if<
_PCCP::template _CopyMovePair< true, _T1, _U2 >(), bool >::type = true> constexpr
std::pair< _T1, _T2 >::pair (const _T1 & __x, _U2 && __y) [inline], [constexpr]
Definition at line 325 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U2 , typename enable_if<
_PCCP::template _CopyMovePair< false, _T1, _U2 >(), bool >::type = false> std::pair< _T1,
_T2 >::pair (const _T1 & __x, _U2 && __y) [inline], [explicit]
Definition at line 332 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U1 , typename _U2 , typename
enable_if< _PCCP::template _MoveConstructiblePair< _U1, _U2 >() &&_PCCP::template
_ImplicitlyMoveConvertiblePair< _U1, _U2 >(), bool >::type = true> constexpr std::pair<
_T1, _T2 >::pair (_U1 && __x, _U2 && __y) [inline], [constexpr]
Definition at line 341 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U1 , typename _U2 , typename
enable_if< _PCCP::template _MoveConstructiblePair< _U1, _U2 >() &&!_PCCP::template
_ImplicitlyMoveConvertiblePair< _U1, _U2 >(), bool >::type = false> constexpr std::pair<
_T1, _T2 >::pair (_U1 && __x, _U2 && __y) [inline], [explicit], [constexpr]
Definition at line 350 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U1 , typename _U2 , typename
enable_if< _PCCFP< _U1, _U2 >::template _MoveConstructiblePair< _U1, _U2 >() &&_PCCFP<
_U1, _U2 >::template _ImplicitlyMoveConvertiblePair< _U1, _U2 >(), bool >::type = true>
constexpr std::pair< _T1, _T2 >::pair (pair< _U1, _U2 > && __p) [inline], [constexpr]
Definition at line 360 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U1 , typename _U2 , typename
enable_if< _PCCFP< _U1, _U2 >::template _MoveConstructiblePair< _U1, _U2 >() &&!_PCCFP<
_U1, _U2 >::template _ImplicitlyMoveConvertiblePair< _U1, _U2 >(), bool >::type = false>
constexpr std::pair< _T1, _T2 >::pair (pair< _U1, _U2 > && __p) [inline], [explicit],
[constexpr]
Definition at line 370 of file stl_pair.h.
Member Function Documentation
template<typename _T1 , typename _T2 > template<typename _U1 , typename _U2 > enable_if<
__and_< is_assignable< _T1 &, const_U1 & >, is_assignable< _T2 &, const_U2 & > >::value,
pair & >::type std::pair< _T1, _T2 >::operator= (const pair< _U1, _U2 > & __p) [inline]
Definition at line 405 of file stl_pair.h.
template<typename _T1 , typename _T2 > template<typename _U1 , typename _U2 > enable_if<
__and_< is_assignable< _T1 &, _U1 && >, is_assignable< _T2 &, _U2 && > >::value, pair &
>::type std::pair< _T1, _T2 >::operator= (pair< _U1, _U2 > && __p) [inline]
Definition at line 416 of file stl_pair.h.
template<typename _T1 , typename _T2 > pair & std::pair< _T1, _T2 >::operator= (typename
conditional< __and_< is_copy_assignable< _T1 >, is_copy_assignable< _T2 > >::value, const
pair< _T1, _T2 > &, const __nonesuch_no_braces & >::type __p) [inline]
Definition at line 378 of file stl_pair.h.
template<typename _T1 , typename _T2 > pair & std::pair< _T1, _T2 >::operator= (typename
conditional< __and_< is_move_assignable< _T1 >, is_move_assignable< _T2 > >::value, pair<
_T1, _T2 > &&, __nonesuch_no_braces && >::type __p) [inline], [noexcept]
Definition at line 389 of file stl_pair.h.
template<typename _T1 , typename _T2 > void std::pair< _T1, _T2 >::swap (pair< _T1, _T2 > &
__p) [inline], [noexcept]
Definition at line 424 of file stl_pair.h.
Member Data Documentation
template<typename _T1 , typename _T2 > _T1 std::pair< _T1, _T2 >::first
second_type is the second bound type
Definition at line 214 of file stl_pair.h.
Referenced by __gnu_parallel::__find_template(), std::__sample(),
__gnu_debug::__valid_range_aux(), std::set< _Key, _Compare, _Alloc >::insert(),
std::operator<(), std::operator==(), and std::regex_replace().
template<typename _T1 , typename _T2 > _T2 std::pair< _T1, _T2 >::second
first is a copy of the first object
Definition at line 215 of file stl_pair.h.
Referenced by std::__sample(), __gnu_debug::__valid_range_aux(), std::set< _Key, _Compare,
_Alloc >::insert(), std::operator<(), std::operator==(), and std::regex_replace().
Author
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