MISRA.CATCH.ALL

No ellipsis exception handler in a try-catch block.

MISRA-C++ Rule 15-3-2 (advisory): There should be at least one exception handler to catch all otherwise unhandled exceptions.

[Implementation 15.3(9), 15.5.1(2)]

Rationale

If a program throws an unhandled exception it terminates in an implementation-defined manner. In particular, it is implementation-defined whether the call stack is unwound, before termination, so the destructors of any automatic objects may or may not be executed. By enforcing the provision of a "last-ditch catch-all", the developer can ensure that the program terminates in a consistent manner.

The objective of Rule 15—3—4 is that a program should catch all exceptions that it is expected to throw. This rule"™s objective is to ensure that exceptions that were not expected are also caught.

Example

For the majority of programs this will mean main should look like:

int32_t main( )
{
   try
   {
      // program code
   }

   catch ( ... ) // Catch-all handler
   {
      // Handle unexpected exceptions
   }
   return 0;
}