17 Language support library [support]

17.9 Exception handling [support.exception]

17.9.5 Abnormal termination [exception.terminate] Type terminate_handler [terminate.handler]

using terminate_handler = void (*)();
The type of a handler function to be invoked by terminate when terminating exception processing.
Required behavior: A terminate_handler shall terminate execution of the program without returning to the caller.
Default behavior: The implementation's default terminate_handler calls abort(). set_terminate [set.terminate]

terminate_handler set_terminate(terminate_handler f) noexcept;
Effects: Establishes the function designated by f as the current handler function for terminating exception processing.
Returns: The previous terminate_handler.
Remarks: It is unspecified whether a null pointer value designates the default terminate_handler. get_terminate [get.terminate]

terminate_handler get_terminate() noexcept;
Returns: The current terminate_handler.
[Note 1: 
This can be a null pointer value.
— end note] terminate [terminate]

[[noreturn]] void terminate() noexcept;
Effects: Calls a terminate_handler function.
It is unspecified which terminate_handler function will be called if an exception is active during a call to set_terminate.
Otherwise calls the current terminate_handler function.
[Note 1: 
A default terminate_handler is always considered a callable handler in this context.
— end note]
Remarks: Called by the implementation when exception handling must be abandoned for any of several reasons ([except.terminate]).
May also be called directly by the program.