std::any::operator= (3) - Linux Man Pages

std::any::operator=: std::any::operator=

NAME

std::any::operator= - std::any::operator=

Synopsis


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


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


              constructs an any object
constructor (public member function)