std::new_handler
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   Defined in header <new>
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|   typedef void (*new_handler)();  | 
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std::new_handler is the function pointer type (pointer to function that takes no arguments and returns void), which is used by the functions std::set_new_handler and std::get_new_handler
[edit] See also
|    allocation functions   (function)  | |
|    registers a new handler  (function)  | |
|    (C++11)  | 
   obtains the current new handler   (function)  |