std::promise::set_exception_at_thread_exit
From cppreference.com
                    
                                        
                    
                    
                                                            
                    | void set_exception_at_thread_exit( std::exception_ptr p ); | (since C++11) | |
Stores the exception pointer p into the shared state without making the state ready immediately. The state is made ready when the current thread exits, after all variables with thread-local storage duration have been destroyed.  
The operation behaves as though set_value, set_exception, set_value_at_thread_exit, and set_exception_at_thread_exit acquire a single mutex associated with the promise object while updating the promise object.
An exception is thrown if there is no shared state or the shared state already stores a value or exception.
| Contents | 
[edit] Parameters
| p | - | exception pointer to store. The behavior is undefined if pis null. | 
[edit] Return value
(none)
[edit] Exceptions
std::future_error on the following conditions:
- *this has no shared state. The error category is set to no_state.
- The shared state already stores a value or exception. The error category is set to promise_already_satisfied.
[edit] Example
| This section is incomplete Reason: no example | 
[edit] See also
| sets the result to indicate an exception (public member function) | 


