std::exception::exception
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   exception();  | 
(1) | |
|   exception( const exception& other );  | 
(2) | |
Constructs new exception object.
1) Default constructor. what() returns empty string.
2) Copy constructor. Initializes the contents with those of other
[edit] Parameters
| other | - | another exception to assign the contents of |