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std::swap(std::optional)

Defined in header <optional>
template< class T >
void swap( optional<T>& lhs, optional<T>& rhs );
(since C++17)

Overloads the std::swap algorithm for std::optional. Exchanges the state of lhs with that of rhs. Effectively calls lhs.swap(rhs).

Parameters

lhs, rhs - optional objects whose states to swap

Return value

(none).

Exceptions

noexcept specification:
noexcept(lhs.swap(rhs))

Example

See also

exchanges the contents
(public member function)

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