| 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).
| lhs, rhs | - | optional objects whose states to swap |
(none).
noexcept specification: noexcept(lhs.swap(rhs))| exchanges the contents (public member function) |
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