std::any Class Reference

Public Member Functions
constexpr	any () noexcept
template<typename _Tp , typename _VTp = _Decay_if_not_any<_Tp>, typename _Mgr = _Manager<_VTp>, enable_if_t< is_copy_constructible_v< _VTp > &&!__is_in_place_type_v< _VTp >, bool > = true>
	any (_Tp &&__value)
	any (any &&__other) noexcept
	any (const any &__other)
template<typename _Tp , typename... _Args, typename _VTp = decay_t<_Tp>, typename _Mgr = _Manager<_VTp>, __any_constructible_t< _VTp, _Args &&... > = false>
	any (in_place_type_t< _Tp >, _Args &&... __args)
template<typename _Tp , typename _Up , typename... _Args, typename _VTp = decay_t<_Tp>, typename _Mgr = _Manager<_VTp>, __any_constructible_t< _VTp, initializer_list< _Up > &, _Args &&... > = false>
	any (in_place_type_t< _Tp >, initializer_list< _Up > __il, _Args &&... __args)
	~any ()
template<typename _Tp , typename... _Args>
__emplace_t< decay_t< _Tp >, _Args... >	emplace (_Args &&... __args)
template<typename _Tp , typename _Up , typename... _Args>
__emplace_t< decay_t< _Tp >, initializer_list< _Up > &, _Args &&... >	emplace (initializer_list< _Up > __il, _Args &&... __args)
bool	has_value () const noexcept
template<typename _Tp >
enable_if_t< is_copy_constructible< _Decay_if_not_any< _Tp > >::value, any & >	operator= (_Tp &&__rhs)
any &	operator= (any &&__rhs) noexcept
any &	operator= (const any &__rhs)
void	reset () noexcept
void	swap (any &__rhs) noexcept
const type_info &	type () const noexcept

Detailed Description

A type-safe container of any type.

An any object's state is either empty or it stores a contained object of CopyConstructible type.

Since

C++17

Definition at line 80 of file any.

Constructor & Destructor Documentation

any() [1/6]

constexpr std::any::any ( )

inlineconstexprnoexcept

Default constructor, creates an empty object.

Definition at line 153 of file any.

any() [2/6]

std::any::any ( const any &  __other )

inline

Copy constructor, copies the state of __other.

Definition at line 156 of file any.

any() [3/6]

std::any::any ( any &&  __other )

inlinenoexcept

Move constructor, transfer the state from __other.

Postcondition

!__other.has_value() (this postcondition is a GNU extension)

Definition at line 173 of file any.

any() [4/6]

template<typename _Tp , typename _VTp = _Decay_if_not_any<_Tp>, typename _Mgr = _Manager<_VTp>, enable_if_t< is_copy_constructible_v< _VTp > &&!__is_in_place_type_v< _VTp >, bool > = true>

std::any::any ( _Tp &&  __value )

inline

Construct with a copy of __value as the contained object.

Definition at line 190 of file any.

any() [5/6]

template<typename _Tp , typename... _Args, typename _VTp = decay_t<_Tp>, typename _Mgr = _Manager<_VTp>, __any_constructible_t< _VTp, _Args &&... > = false>

std::any::any ( in_place_type_t< _Tp >  , _Args &&...  __args  )

inlineexplicit

Construct with an object created from __args as the contained object.

Definition at line 201 of file any.

any() [6/6]

template<typename _Tp , typename _Up , typename... _Args, typename _VTp = decay_t<_Tp>, typename _Mgr = _Manager<_VTp>, __any_constructible_t< _VTp, initializer_list< _Up > &, _Args &&... > = false>

std::any::any ( in_place_type_t< _Tp >  , initializer_list< _Up >  __il, _Args &&...  __args  )

inlineexplicit

Construct with an object created from __il and __args as the contained object.

Definition at line 214 of file any.

~any()

std::any::~any ( )

inline

Destructor, calls reset()

Definition at line 221 of file any.

Member Function Documentation

emplace() [1/2]

template<typename _Tp , typename... _Args>

__emplace_t< decay_t< _Tp >, _Args... > std::any::emplace ( _Args &&...  __args )

inline

Emplace with an object created from __args as the contained object.

Definition at line 265 of file any.

emplace() [2/2]

template<typename _Tp , typename _Up , typename... _Args>

__emplace_t< decay_t< _Tp >, initializer_list< _Up > &, _Args &&... > std::any::emplace ( initializer_list< _Up >  __il, _Args &&...  __args  )

inline

Emplace with an object created from __il and __args as the contained object.

Definition at line 276 of file any.

has_value()

bool std::any::has_value ( ) const

inlinenoexcept

Reports whether there is a contained object or not.

Definition at line 328 of file any.

operator=() [1/3]

template<typename _Tp >

enable_if_t< is_copy_constructible< _Decay_if_not_any< _Tp > >::value, any & > std::any::operator= ( _Tp &&  __rhs )

inline

Store a copy of __rhs as the contained object.

Definition at line 256 of file any.

operator=() [2/3]

any & std::any::operator= ( any &&  __rhs )

inlinenoexcept

Move assignment operator.

Postcondition

!__rhs.has_value() (not guaranteed for other implementations)

Definition at line 239 of file any.

operator=() [3/3]

any & std::any::operator= ( const any &  __rhs )

inline

Copy the state of another object.

Definition at line 227 of file any.

reset()

void std::any::reset ( )

inlinenoexcept

If not empty, destroy the contained object.

Definition at line 286 of file any.

swap()

void std::any::swap ( any &  __rhs )

inlinenoexcept

Exchange state with another object.

Definition at line 296 of file any.

type()

const type_info & std::any::type ( ) const

inlinenoexcept

The typeid of the contained object, or typeid(void) if empty.

Definition at line 332 of file any.

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

• any