std::experimental::any

Section: C Library Functions (3)
Updated: Wed Apr 17 2019
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NAME

std::experimental::any - A type-safe container of any type.

SYNOPSIS

Public Member Functions

any () noexcept
Default constructor, creates an empty object.
any (const any &__other)
Copy constructor, copies the state of __other.
any (any &&__other) noexcept
Move constructor, transfer the state from __other.
template<typename _ValueType , typename _Tp = _Decay<_ValueType>, typename _Mgr = _Manager<_Tp>, typename enable_if< is_constructible< _Tp, _ValueType && >::value, bool >::type = true> any (_ValueType &&__value)
Construct with a copy of __value as the contained object.
template<typename _ValueType , typename _Tp = _Decay<_ValueType>, typename _Mgr = _Manager<_Tp>, typename enable_if<!is_constructible< _Tp, _ValueType && >::value, bool >::type = false> any (_ValueType &&__value)
Construct with a copy of __value as the contained object.
~any ()
Destructor, calls clear()
void clear () noexcept
If not empty, destroy the contained object.
bool empty () const noexcept
Reports whether there is a contained object or not.
any & operator= (const any &__rhs)
Copy the state of another object.
any & operator= (any &&__rhs) noexcept
Move assignment operator.
template<typename _ValueType > enable_if_t<!is_same< any, decay_t< _ValueType > >::value, any & > operator= (_ValueType &&__rhs)
Store a copy of __rhs as the contained object.
void swap (any &__rhs) noexcept
Exchange state with another object.
const type_info & type () const noexcept
The typeid of the contained object, or typeid(void) if empty.

Static Public Member Functions

template<typename _Tp > static constexpr bool __is_valid_cast ()

Friends

template<typename _Tp > void * __any_caster (const any *__any)

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.

Definition at line 87 of file any.

Constructor & Destructor Documentation

std::experimental::any::any () [inline], [noexcept]

Default constructor, creates an empty object.

Definition at line 126 of file any.

Referenced by operator=().

std::experimental::any::any (const any & __other) [inline]

Copy constructor, copies the state of __other.

Definition at line 129 of file any.

References empty().

std::experimental::any::any (any && __other) [inline], [noexcept]

Move constructor, transfer the state from __other.

Postcondition:

: __other.empty() (this postcondition is a GNU extension)

Definition at line 146 of file any.

template<typename _ValueType , typename _Tp = _Decay<_ValueType>, typename _Mgr = _Manager<_Tp>, typename enable_if< is_constructible< _Tp, _ValueType && >::value, bool >::type = true> std::experimental::any::any (_ValueType && __value) [inline]

Construct with a copy of __value as the contained object.

Definition at line 163 of file any.

template<typename _ValueType , typename _Tp = _Decay<_ValueType>, typename _Mgr = _Manager<_Tp>, typename enable_if<!is_constructible< _Tp, _ValueType && >::value, bool >::type = false> std::experimental::any::any (_ValueType && __value) [inline]

Construct with a copy of __value as the contained object.

Definition at line 176 of file any.

std::experimental::any::~any () [inline]

Destructor, calls clear()

Definition at line 185 of file any.

References clear().

Member Function Documentation

void std::experimental::any::clear () [inline], [noexcept]

If not empty, destroy the contained object.

Definition at line 227 of file any.

References empty().

Referenced by operator=(), and ~any().

bool std::experimental::any::empty () const [inline], [noexcept]

Reports whether there is a contained object or not.

Definition at line 269 of file any.

Referenced by any(), clear(), swap(), and type().

any& std::experimental::any::operator= (const any & __rhs) [inline]

Copy the state of another object.

Definition at line 190 of file any.

References any().

any& std::experimental::any::operator= (any && __rhs) [inline], [noexcept]

Move assignment operator.

Postcondition:

: __rhs.empty() (not guaranteed for other implementations)

Definition at line 201 of file any.

References clear().

template<typename _ValueType > enable_if_t<!is_same<any, decay_t<_ValueType> >::value, any&> std::experimental::any::operator= (_ValueType && __rhs) [inline]

Store a copy of __rhs as the contained object.

Definition at line 218 of file any.

References any().

void std::experimental::any::swap (any & __rhs) [inline], [noexcept]

Exchange state with another object.

Definition at line 237 of file any.

References empty().

const type_info& std::experimental::any::type () const [inline], [noexcept]

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

Definition at line 273 of file any.

References empty().

Author

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