libstdc++
std::experimental::fundamentals_v1::optional< _Tp > Class Template Reference
Inheritance diagram for std::experimental::fundamentals_v1::optional< _Tp >:
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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-> ()
 
optionaloperator= (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 >() &&__is_nothrow_swappable< _Tp >::value)
 
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 81 of file optional.


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