std::any::operator=

 

C++

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Technical Specifications

 

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rel_ops::operator!=rel_ops::operator>rel_ops::operator<=rel_ops::operator>=
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pair tuple (C++11) apply (C++17) make_from_tuple (C++17)	optional (C++17) any (C++17) variant (C++17)
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std::any

Member functions

any::any

any::~any

any::operator=

Modifiers

any::emplace

any::reset

any::swap

Observers

any::has_value

any::type

Non-member functions

swap(std::any)

any_cast

make_any

 

any& operator=( const any& rhs );	(1)	(since C++17)
any& operator=( any&& rhs ) noexcept;	(2)	(since C++17)
template<typename ValueType>     any& operator=( ValueType&& rhs );	(3)	(since C++17)

Assigns contents to the contained value.

1) Assigns by copying the state of rhs, as if by any(rhs).swap(*this).

2) Assigns by moving the state of rhs, as if by any(std::move(rhs)).swap(*this). rhs is left in a valid but unspecified state after the assignment.

3) Assigns the type and value of rhs, as if by any(std::forward<ValueType>(rhs)).swap(*this). This overload only participates in overload resolution if std::decay_t<ValueType> is not the same type as any and std::is_copy_constructible_v<std::decay_t<ValueType>> is true. .

Template parameters

ValueType	-	contained value type
Type requirements
- std::decay_t<ValueType> must meet the requirements of CopyConstructible.

Parameters

rhs

-

object whose contained value to assign

Return value

*this

Exceptions

1,3) Throws bad_alloc or any exception thrown by the constructor of the contained type. If an exception is thrown, there are no effects (strong exception guarantee).

See also

(constructor)

constructs an any object (public member function)