std::basic_ios::swap
From cppreference.com
                    
                                        
                    
                    
                                                            
                    | protected: void swap( basic_ios& other ); | (since C++11) | |
Exchanges the states of *this and other, except for the associated rdbuf objects. rdbuf() and other.rdbuf() returns the same values as before the call.
This swap function is protected: it is called by the swap member functions of the derived stream classes such as std::basic_ofstream or std::basic_istringstream, which know how to correctly swap the associated streambuffers.
| Contents | 
[edit] Parameters
| other | - | the basic_iosobject to exchange the state with | 
[edit] Return value
(none)
[edit] Exceptions
noexcept specification:  
noexcept
  [edit] See also
| (C++11) | moves from another std::basic_ios except for rdbuf(protected member function) | 


