std::any::operator= (3) - Linux Manuals

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).