std::any(3cxx) | std::any(3cxx) |
NAME¶
std::any - A type-safe container of any type.
SYNOPSIS¶
Public Member Functions¶
constexpr any () noexcept
Default constructor, creates an empty object. template<typename _Tp ,
typename _VTp = _Decay_if_not_any<_Tp>, typename _Mgr =
_Manager<_VTp>, enable_if_t< is_copy_constructible< _VTp
>::value &&!__is_in_place_type< _VTp >::value, bool > =
true> any (_Tp &&__value)
Construct with a copy of __value as the contained object. any
(any &&__other) noexcept
Move constructor, transfer the state from __other. any (const
any &__other)
Copy constructor, copies the state of __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)
Construct with an object created from __args as the contained object.
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)
Construct with an object created from __il and __args as the contained
object. ~any ()
Destructor, calls reset() template<typename _Tp , typename...
_Args> __emplace_t< decay_t< _Tp >, _Args... >
emplace (_Args &&... __args)
Emplace with an object created from __args as the contained object.
template<typename _Tp , typename _Up , typename... _Args>
__emplace_t< decay_t< _Tp >, initializer_list< _Up
> &, _Args &&... > emplace
(initializer_list< _Up > __il, _Args &&... __args)
Emplace with an object created from __il and __args as the contained
object. bool has_value () const noexcept
Reports whether there is a contained object or not. template<typename _Tp
> enable_if_t< is_copy_constructible<
_Decay_if_not_any< _Tp > >::value, any & >
operator= (_Tp &&__rhs)
Store a copy of __rhs as the contained object. any &
operator= (any &&__rhs) noexcept
Move assignment operator. any & operator= (const any
&__rhs)
Copy the state of another object. void reset () noexcept
If not empty, destroy 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 77 of file any.
Constructor & Destructor Documentation¶
constexpr std::any::any () [inline], [constexpr], [noexcept]¶
Default constructor, creates an empty object.
Definition at line 150 of file any.
std::any::any (const any & __other) [inline]¶
Copy constructor, copies the state of __other.
Definition at line 153 of file any.
std::any::any (any && __other) [inline], [noexcept]¶
Move constructor, transfer the state from __other.
Postcondition
Definition at line 170 of file any.
template<typename _Tp , typename _VTp = _Decay_if_not_any<_Tp>, typename _Mgr = _Manager<_VTp>, enable_if_t< is_copy_constructible< _VTp >::value &&!__is_in_place_type< _VTp >::value, bool > = true> std::any::any (_Tp && __value) [inline]¶
Construct with a copy of __value as the contained object.
Definition at line 187 of file any.
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) [inline], [explicit]¶
Construct with an object created from __args as the contained object.
Definition at line 198 of file any.
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) [inline], [explicit]¶
Construct with an object created from __il and __args as the contained object.
Definition at line 211 of file any.
std::any::~any () [inline]¶
Destructor, calls reset()
Definition at line 218 of file any.
Member Function Documentation¶
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 262 of file any.
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 275 of file any.
bool std::any::has_value () const [inline], [noexcept]¶
Reports whether there is a contained object or not.
Definition at line 329 of file any.
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 253 of file any.
any& std::any::operator= (any && __rhs) [inline], [noexcept]¶
Move assignment operator.
Postcondition
Definition at line 236 of file any.
any& std::any::operator= (const any & __rhs) [inline]¶
Copy the state of another object.
Definition at line 224 of file any.
void std::any::reset () [inline], [noexcept]¶
If not empty, destroy the contained object.
Definition at line 287 of file any.
void std::any::swap (any & __rhs) [inline], [noexcept]¶
Exchange state with another object.
Definition at line 297 of file any.
const type_info& std::any::type () const [inline], [noexcept]¶
The typeid of the contained object, or typeid(void) if empty.
Definition at line 333 of file any.
Author¶
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Wed Jul 28 2021 | libstdc++ |