std::swap(std::unique_ptr) (3) Linux Manual Page

std::swap(std::unique_ptr) – std::swap(std::unique_ptr)

Synopsis

template <class T, class Deleter>
(since C++ 11)

    void swap(unique_ptr<T, Deleter> &lhs, unique_ptr<T, Deleter> &rhs) noexcept;

Specializes the std::swap algorithm for std::unique_ptr. Swaps the pointers of lhs and rhs. Calls lhs.swap(rhs).
This function does not participate in overload resolution unless std::is_swappable<D>::value is true. (since C++17)

Parameters

lhs, rhs – smart pointers whose contents to swap

Return value

(none)

Complexity

Constant

See also

     swaps the values of two objects
swap (function template)
     swaps the contents
swap (public member function)