std::basic_streambuf<CharT,Traits>::swap
From cppreference.com
                    
                                        
                    < cpp | io | basic streambuf
                    
                                                            
                    |   void swap( basic_streambuf& other );  | 
(since C++11) | |
Exchanges  the contents of the stream buffer with those of other. 
Parameters
| other | - | stream buffer to exchange contents with | 
Return value
(none)
Exceptions
May throw implementation-defined exceptions.
Example
| This section is incomplete Reason: no example  |