std::pair< _T1, _T2 >(3) | Library Functions Manual | std::pair< _T1, _T2 >(3) |
NAME¶
std::pair< _T1, _T2 > - Struct holding two objects of arbitrary type.
SYNOPSIS¶
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 = _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 _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 (const pair &)=default
constexpr pair (pair &&)=default
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 _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)
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 _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... >)
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)
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)
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:
_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 283 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 _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]¶
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.
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 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==(), and std::regex_replace().
Author¶
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Fri May 24 2024 | libstdc++ |