std::chrono::duration<Rep,Period>::operator=
From cppreference.com
                    
                                        
                    
                    
                                                            
                    | duration& operator=( const duration &other ) = default; | (since C++11) | |
Assigns the contents of one duration to another.
Parameters
| other | - | durationto copy from | 
See also
| constructs new duration (public member function) |