libstdc++
std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor > Class Template Reference
Inheritance diagram for std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >:
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Public Member Functions

 _Optional_base (_Optional_base &&__other) noexcept(is_nothrow_move_constructible< _Tp >())
 
 _Optional_base (const _Optional_base &__other)
 
template<typename... _Args>
constexpr _Optional_base (in_place_t, _Args &&... __args)
 
template<typename _Up , typename... _Args, enable_if_t< is_constructible< _Tp, initializer_list< _Up > &, _Args &&... >::value, int > ...>
constexpr _Optional_base (in_place_t, initializer_list< _Up > __il, _Args &&... __args)
 
constexpr _Optional_base (nullopt_t) noexcept
 
_Optional_baseoperator= (_Optional_base &&__other) noexcept(__and_< is_nothrow_move_constructible< _Tp >, is_nothrow_move_assignable< _Tp > >())
 
_Optional_baseoperator= (const _Optional_base &__other)
 

Protected Member Functions

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

Detailed Description

template<typename _Tp, bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
class std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >

Class template that holds the necessary state for Optional values and that has the responsibility for construction and the special members.

Such a separate base class template is necessary in order to conditionally enable the special members (e.g. copy/move constructors). Note that this means that _Optional_base implements the functionality for copy and move assignment, but not for converting assignment.

See also
optional, _Enable_special_members

Definition at line 202 of file optional.

Constructor & Destructor Documentation

◆ _Optional_base() [1/6]

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
constexpr std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_Optional_base ( )
inlineconstexprnoexcept

Definition at line 214 of file optional.

◆ _Optional_base() [2/6]

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
constexpr std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_Optional_base ( nullopt_t  )
inlineconstexprnoexcept

Definition at line 217 of file optional.

◆ _Optional_base() [3/6]

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
template<typename... _Args>
constexpr std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_Optional_base ( in_place_t  ,
_Args &&...  __args 
)
inlineexplicitconstexpr

Definition at line 222 of file optional.

◆ _Optional_base() [4/6]

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
template<typename _Up , typename... _Args, enable_if_t< is_constructible< _Tp, initializer_list< _Up > &, _Args &&... >::value, int > ...>
constexpr std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_Optional_base ( in_place_t  ,
initializer_list< _Up >  __il,
_Args &&...  __args 
)
inlineexplicitconstexpr

Definition at line 230 of file optional.

◆ _Optional_base() [5/6]

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_Optional_base ( const _Optional_base< _Tp, _ShouldProvideDestructor > &  __other)
inline

Definition at line 237 of file optional.

◆ _Optional_base() [6/6]

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_Optional_base ( _Optional_base< _Tp, _ShouldProvideDestructor > &&  __other)
inlinenoexcept

Definition at line 243 of file optional.

◆ ~_Optional_base()

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::~_Optional_base ( )
inline

Definition at line 285 of file optional.

Member Function Documentation

◆ _M_construct()

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
template<typename... _Args>
void std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_M_construct ( _Args &&...  __args)
inlineprotectednoexcept

Definition at line 310 of file optional.

◆ _M_destruct()

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
void std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_M_destruct ( )
inlineprotected

Definition at line 319 of file optional.

◆ _M_get() [1/2]

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
constexpr const _Tp & std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_M_get ( ) const
inlineconstexprprotectednoexcept

Definition at line 303 of file optional.

◆ _M_get() [2/2]

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
constexpr _Tp & std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_M_get ( )
inlineconstexprprotectednoexcept

Definition at line 299 of file optional.

◆ _M_is_engaged()

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
constexpr bool std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_M_is_engaged ( ) const
inlineconstexprprotectednoexcept

Definition at line 294 of file optional.

◆ _M_reset()

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
void std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_M_reset ( )
inlineprotected

Definition at line 327 of file optional.

◆ operator=() [1/2]

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
_Optional_base & std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::operator= ( _Optional_base< _Tp, _ShouldProvideDestructor > &&  __other)
inlinenoexcept

Definition at line 268 of file optional.

◆ operator=() [2/2]

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
_Optional_base & std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::operator= ( const _Optional_base< _Tp, _ShouldProvideDestructor > &  __other)
inline

Definition at line 252 of file optional.

Member Data Documentation

◆ _M_empty

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
_Empty_byte std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_M_empty

Definition at line 336 of file optional.

◆ _M_payload

template<typename _Tp , bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value>
_Stored_type std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor >::_M_payload

Definition at line 337 of file optional.


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