std::experimental::fundamentals_v1::optional< _Tp > Class Template Reference

Inheritance diagram for std::experimental::fundamentals_v1::optional< _Tp >:

Public Types
using	value_type = _Tp

Public Member Functions
template<typename _Up = _Tp, enable_if_t< __and_< __not_< is_same< optional< _Tp >, decay_t< _Up >>>, is_constructible< _Tp, _Up && >, is_convertible< _Up &&, _Tp > >::value, bool > = true>
constexpr	optional (_Up &&__t)
template<typename _Up = _Tp, enable_if_t< __and_< __not_< is_same< optional< _Tp >, decay_t< _Up >>>, is_constructible< _Tp, _Up && >, __not_< is_convertible< _Up &&, _Tp >> >::value, bool > = false>
constexpr	optional (_Up &&__t)
template<typename _Up , enable_if_t< __and_< __not_< is_same< _Tp, _Up >>, is_constructible< _Tp, const _Up & >, is_convertible< const _Up &, _Tp >, __not_< __converts_from_optional< _Tp, _Up >> >::value, bool > = true>
constexpr	optional (const optional< _Up > &__t)
template<typename _Up , enable_if_t< __and_< __not_< is_same< _Tp, _Up >>, is_constructible< _Tp, const _Up & >, __not_< is_convertible< const _Up &, _Tp >>, __not_< __converts_from_optional< _Tp, _Up >> >::value, bool > = false>
constexpr	optional (const optional< _Up > &__t)
template<typename _Up , enable_if_t< __and_< __not_< is_same< _Tp, _Up >>, is_constructible< _Tp, _Up && >, is_convertible< _Up &&, _Tp >, __not_< __converts_from_optional< _Tp, _Up >> >::value, bool > = true>
constexpr	optional (optional< _Up > &&__t)
template<typename _Up , enable_if_t< __and_< __not_< is_same< _Tp, _Up >>, is_constructible< _Tp, _Up && >, __not_< is_convertible< _Up &&, _Tp >>, __not_< __converts_from_optional< _Tp, _Up >> >::value, bool > = false>
constexpr	optional (optional< _Up > &&__t)
template<typename... _Args>
enable_if_t< is_constructible< _Tp, _Args &&... >::value >	emplace (_Args &&...__args)
template<typename _Up , typename... _Args>
enable_if_t< is_constructible< _Tp, initializer_list< _Up > &, _Args &&... >::value >	emplace (initializer_list< _Up > __il, _Args &&...__args)
constexpr	operator bool () const noexcept
constexpr const _Tp &	operator* () const &
constexpr _Tp &	operator* ()&
constexpr _Tp &&	operator* ()&&
constexpr const _Tp &&	operator* () const &&
constexpr const _Tp *	operator-> () const
_Tp *	operator-> ()
optional &	operator= (nullopt_t) noexcept
template<typename _Up = _Tp>
enable_if_t< __and_< __not_< is_same< optional< _Tp >, decay_t< _Up > > >, is_constructible< _Tp, _Up >, __not_< __and_< is_scalar< _Tp >, is_same< _Tp, decay_t< _Up > > > >, is_assignable< _Tp &, _Up > >::value, optional & >	operator= (_Up &&__u)
template<typename _Up >
enable_if_t< __and_< __not_< is_same< _Tp, _Up > >, is_constructible< _Tp, const _Up & >, is_assignable< _Tp &, _Up >, __not_< __converts_from_optional< _Tp, _Up > >, __not_< __assigns_from_optional< _Tp, _Up > > >::value, optional & >	operator= (const optional< _Up > &__u)
template<typename _Up >
enable_if_t< __and_< __not_< is_same< _Tp, _Up > >, is_constructible< _Tp, _Up >, is_assignable< _Tp &, _Up >, __not_< __converts_from_optional< _Tp, _Up > >, __not_< __assigns_from_optional< _Tp, _Up > > >::value, optional & >	operator= (optional< _Up > &&__u)
void	swap (optional &__other) noexcept(is_nothrow_move_constructible< _Tp >() &&noexcept(swap(declval< _Tp & >(), declval< _Tp & >())))
constexpr const _Tp &	value () const &
constexpr _Tp &	value ()&
constexpr _Tp &&	value ()&&
constexpr const _Tp &&	value () const &&
template<typename _Up >
constexpr _Tp	value_or (_Up &&__u) const &
template<typename _Up >
_Tp	value_or (_Up &&__u)&&

Private Member Functions
void	_M_construct (_Args &&...__args) noexcept(is_nothrow_constructible< _Stored_type, _Args... >())
void	_M_destruct ()
constexpr _Tp &	_M_get () noexcept
constexpr const _Tp &	_M_get () const noexcept
constexpr bool	_M_is_engaged () const noexcept
void	_M_reset ()

Private Attributes
_Empty_byte	_M_empty
_Stored_type	_M_payload

Detailed Description

template<typename _Tp>
class std::experimental::fundamentals_v1::optional< _Tp >

Class template for optional values.

Definition at line 83 of file optional.

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The documentation for this class was generated from the following file:

• optional