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std::swap(std::optional)

From cppreference.com
< cpp‎ | utility‎ | 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).

Contents

[edit] Parameters

lhs, rhs - optional objects whose states to swap

[edit] Return value

(none)

[edit] Exceptions

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

[edit] Example

[edit] See also

exchanges the contents
(public member function) [edit]