#include <utility>

Public Types
typedef _T1	first_type

typedef _T2	second_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 ()

template<typename _U2, __enable_if_t< __and_< is_pointer< _T1 >, __not_< is_reference< _U2 > >, is_constructible< _T2, _U2 >, __not_< is_constructible< _T2, const _U2 & > >, is_convertible< _U2, _T2 > >::value, bool > = true>
constexpr	pair (__zero_as_null_pointer_constant, _U2 &&__y,...)

template<typename _U2, __enable_if_t< __and_< is_pointer< _T1 >, __not_< is_reference< _U2 > >, is_constructible< _T2, _U2 >, __not_< is_constructible< _T2, const _U2 & > >, __not_< is_convertible< _U2, _T2 > > >::value, bool > = false>
constexpr	pair (__zero_as_null_pointer_constant, _U2 &&__y,...)

template<typename _U1, __enable_if_t< __and_< __not_< is_reference< _U1 > >, is_pointer< _T2 >, is_constructible< _T1, _U1 >, __not_< is_constructible< _T1, const _U1 & > >, is_convertible< _U1, _T1 > >::value, bool > = true>
constexpr	pair (_U1 &&__x, __zero_as_null_pointer_constant,...)

template<typename _U1, __enable_if_t< __and_< __not_< is_reference< _U1 > >, is_pointer< _T2 >, is_constructible< _T1, _U1 >, __not_< is_constructible< _T1, const _U1 & > >, __not_< is_convertible< _U1, _T1 > > >::value, bool > = false>
constexpr	pair (_U1 &&__x, __zero_as_null_pointer_constant,...)

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 = _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)

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>
constexpr	pair (piecewise_construct_t, tuple< _Args1... >, tuple< _Args2... >)

pair &	operator= (__conditional_t< __and_< is_copy_assignable< _T1 >, is_copy_assignable< _T2 > >::value, const pair &, const __nonesuch & > __p)

pair &	operator= (__conditional_t< __and_< is_move_assignable< _T1 >, is_move_assignable< _T2 > >::value, pair &&, __nonesuch && > __p) noexcept(__and_< is_nothrow_move_assignable< _T1 >, is_nothrow_move_assignable< _T2 > >::value)

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)

constexpr void	swap (pair &__p) noexcept(__and_< __is_nothrow_swappable< _T1 >, __is_nothrow_swappable< _T2 > >::value)

Public Attributes
_T1	first

_T2	second

Related Symbols
(Note that these are not member symbols.)

template<typename _T1, typename _T2>
	pair (_T1, _T2) -> pair< _T1, _T2 >

template<typename _T1, typename _T2, typename _U1, typename _U2>
constexpr bool	operator== (const pair< _T1, _T2 > &__x, const pair< _U1, _U2 > &__y)

template<typename _T1, typename _T2, typename _U1, typename _U2>
constexpr common_comparison_category_t< __detail::__synth3way_t< _T1, _U1 >, __detail::__synth3way_t< _T2, _U2 > >	operator<=> (const pair< _T1, _T2 > &__x, const pair< _U1, _U2 > &__y)

template<typename _T1, typename _T2>
constexpr enable_if< __and_< __is_swappable< _T1 >, __is_swappable< _T2 > >::value >::type	swap (pair< _T1, _T2 > &__x, pair< _T1, _T2 > &__y) noexcept(noexcept(__x.swap(__y)))

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.

https://gcc.gnu.org/onlinedocs/libstdc++/manual/utilities.html

Definition at line 302 of file stl_pair.h.

Member Typedef Documentation

◆ first_type

template<typename _T1, typename _T2>

typedef _T1 std::pair< _T1, _T2 >::first_type

The type of the first member.

Definition at line 305 of file stl_pair.h.

◆ second_type

template<typename _T1, typename _T2>

typedef _T2 std::pair< _T1, _T2 >::second_type

The type of the second member.

Definition at line 306 of file stl_pair.h.

Constructor & Destructor Documentation

◆ pair() [1/16]

template<typename _T1, typename _T2>

std::pair< _T1, _T2 >::pair ( const pair< _T1, _T2 > & )

constexprdefault

Copy constructor.

◆ pair() [2/16]

template<typename _T1, typename _T2>

std::pair< _T1, _T2 >::pair ( pair< _T1, _T2 > && )

constexprdefault

Move constructor.

◆ pair() [3/16]

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>

std::pair< _T1, _T2 >::pair ( )

inlineconstexpr

The default constructor creates first and second using their respective default constructors.

Definition at line 745 of file stl_pair.h.

◆ pair() [4/16]

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>

std::pair< _T1, _T2 >::pair ( )

inlineexplicitconstexpr

Definition at line 757 of file stl_pair.h.

◆ pair() [5/16]

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>

std::pair< _T1, _T2 >::pair	(	const _T1 &	__a,
		const _T2 &	__b )

inlineconstexpr

Construct from two const lvalues, allowing implicit conversions.

Definition at line 772 of file stl_pair.h.

◆ pair() [6/16]

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>

std::pair< _T1, _T2 >::pair	(	const _T1 &	__a,
		const _T2 &	__b )

inlineexplicitconstexpr

Construct from two const lvalues, disallowing implicit conversions.

Definition at line 782 of file stl_pair.h.

◆ pair() [7/16]

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>

std::pair< _T1, _T2 >::pair ( const pair< _U1, _U2 > & __p )

inlineconstexpr

Definition at line 799 of file stl_pair.h.

◆ pair() [8/16]

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>

std::pair< _T1, _T2 >::pair ( const pair< _U1, _U2 > & __p )

inlineexplicitconstexpr

Definition at line 809 of file stl_pair.h.

◆ pair() [9/16]

template<typename _T1, typename _T2>

template<typename _U1, __enable_if_t< __and_< __not_< is_reference< _U1 > >, is_pointer< _T2 >, is_constructible< _T1, _U1 >, __not_< is_constructible< _T1, const _U1 & > >, is_convertible< _U1, _T1 > >::value, bool > = true>

std::pair< _T1, _T2 >::pair	(	_U1 &&	__x,
		__zero_as_null_pointer_constant	,
			... )

inlineconstexpr

Definition at line 850 of file stl_pair.h.

◆ pair() [10/16]

template<typename _T1, typename _T2>

template<typename _U1, __enable_if_t< __and_< __not_< is_reference< _U1 > >, is_pointer< _T2 >, is_constructible< _T1, _U1 >, __not_< is_constructible< _T1, const _U1 & > >, __not_< is_convertible< _U1, _T1 > > >::value, bool > = false>

std::pair< _T1, _T2 >::pair	(	_U1 &&	__x,
		__zero_as_null_pointer_constant	,
			... )

inlineexplicitconstexpr

Definition at line 863 of file stl_pair.h.

◆ pair() [11/16]

template<typename _T1, typename _T2>

template<typename _U2, __enable_if_t< __and_< is_pointer< _T1 >, __not_< is_reference< _U2 > >, is_constructible< _T2, _U2 >, __not_< is_constructible< _T2, const _U2 & > >, is_convertible< _U2, _T2 > >::value, bool > = true>

std::pair< _T1, _T2 >::pair	(	__zero_as_null_pointer_constant	,
		_U2 &&	__y,
			... )

inlineconstexpr

Definition at line 876 of file stl_pair.h.

◆ pair() [12/16]

template<typename _T1, typename _T2>

template<typename _U2, __enable_if_t< __and_< is_pointer< _T1 >, __not_< is_reference< _U2 > >, is_constructible< _T2, _U2 >, __not_< is_constructible< _T2, const _U2 & > >, __not_< is_convertible< _U2, _T2 > > >::value, bool > = false>

std::pair< _T1, _T2 >::pair	(	__zero_as_null_pointer_constant	,
		_U2 &&	__y,
			... )

inlineexplicitconstexpr

Definition at line 889 of file stl_pair.h.

◆ pair() [13/16]

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>

std::pair< _T1, _T2 >::pair	(	_U1 &&	__x,
		_U2 &&	__y )

inlineconstexpr

Definition at line 901 of file stl_pair.h.

◆ pair() [14/16]

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>

std::pair< _T1, _T2 >::pair	(	_U1 &&	__x,
		_U2 &&	__y )

inlineexplicitconstexpr

Definition at line 911 of file stl_pair.h.

◆ pair() [15/16]

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>

std::pair< _T1, _T2 >::pair ( pair< _U1, _U2 > && __p )

inlineconstexpr

Definition at line 922 of file stl_pair.h.

◆ pair() [16/16]

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>

std::pair< _T1, _T2 >::pair ( pair< _U1, _U2 > && __p )

inlineexplicitconstexpr

Definition at line 933 of file stl_pair.h.

Member Function Documentation

◆ operator=() [1/4]

template<typename _T1, typename _T2>

pair & std::pair< _T1, _T2 >::operator= ( __conditional_t< __and_< is_copy_assignable< _T1 >, is_copy_assignable< _T2 > >::value, const pair< _T1, _T2 > &, const __nonesuch & > __p )

inline

Definition at line 941 of file stl_pair.h.

◆ operator=() [2/4]

template<typename _T1, typename _T2>

pair & std::pair< _T1, _T2 >::operator= ( __conditional_t< __and_< is_move_assignable< _T1 >, is_move_assignable< _T2 > >::value, pair< _T1, _T2 > &&, __nonesuch && > __p )

inlinenoexcept

Definition at line 951 of file stl_pair.h.

◆ operator=() [3/4]

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 966 of file stl_pair.h.

◆ operator=() [4/4]

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 977 of file stl_pair.h.

◆ swap()

template<typename _T1, typename _T2>

void std::pair< _T1, _T2 >::swap ( pair< _T1, _T2 > & __p )

inlineconstexprnoexcept

Swap the first members and then the second members.

Definition at line 321 of file stl_pair.h.

Referenced by std::pair< const __iter_key_t< _InputIterator >, __iter_val_t< _InputIterator > >::swap(), std::sub_match< const char * >::swap(), and std::swap().

Member Data Documentation

◆ first

template<typename _T1, typename _T2>

_T1 std::pair< _T1, _T2 >::first

The first member.

Definition at line 308 of file stl_pair.h.

Referenced by __gnu_parallel::__find_template(), __gnu_parallel::__find_template(), std::__sample(), std::set< _Key, _Cmp, polymorphic_allocator< _Key > >::insert(), std::pair< const __iter_key_t< _InputIterator >, __iter_val_t< _InputIterator > >::operator<=>(), std::pair< const __iter_key_t< _InputIterator >, __iter_val_t< _InputIterator > >::operator==(), and std::shuffle().

◆ second

template<typename _T1, typename _T2>

_T2 std::pair< _T1, _T2 >::second

The second member.

Definition at line 309 of file stl_pair.h.

Referenced by std::__sample(), std::set< _Key, _Cmp, polymorphic_allocator< _Key > >::insert(), std::pair< const __iter_key_t< _InputIterator >, __iter_val_t< _InputIterator > >::operator<=>(), std::pair< const __iter_key_t< _InputIterator >, __iter_val_t< _InputIterator > >::operator==(), and std::shuffle().

The documentation for this struct was generated from the following files:

Public Types

Public Member Functions

Public Attributes

Related Symbols

Detailed Description

Member Typedef Documentation

◆ first_type

◆ second_type

Constructor & Destructor Documentation

◆ pair() [1/16]

◆ pair() [2/16]

◆ pair() [3/16]

◆ pair() [4/16]

◆ pair() [5/16]

◆ pair() [6/16]

◆ pair() [7/16]

◆ pair() [8/16]

◆ pair() [9/16]

◆ pair() [10/16]

◆ pair() [11/16]

◆ pair() [12/16]

◆ pair() [13/16]

◆ pair() [14/16]

◆ pair() [15/16]

◆ pair() [16/16]

Member Function Documentation

◆ operator=() [1/4]

◆ operator=() [2/4]

◆ operator=() [3/4]

◆ operator=() [4/4]

◆ swap()

Member Data Documentation

◆ first

◆ second