std::swap(std::shared_ptr)
From cppreference.com
                    
                                        
                    < cpp | memory | shared ptr
                    
                                                            
                    |   template< class T > 
void swap( shared_ptr<T>& lhs, shared_ptr<T>& rhs );  | 
(since C++11) | |
Specializes the std::swap algorithm for std::shared_ptr. Swaps the pointers of lhs and rhs. Calls lhs.swap(rhs).
Contents | 
[edit] Parameters
| lhs, rhs | - | smart pointers whose contents to swap | 
[edit] Return value
(none)
[edit] Exceptions
noexcept specification:  
noexcept
  [edit] Complexity
Constant
[edit] See also
|    swaps the values of two objects   (function template)  | 
|
|    swaps the contents   (public member function)  |