c++ dynamic_cast error handling

Question

Is there any good practice related to dynamic_cast error handling (except not using it when you don\'t have to)? I\'m wondering how should I go about NULL and bad_cast it can th

Answer 1

I'd concur with the 'it depends' answer, and also add "Graceful degradation": just because a cast fails somewhere isn't enough reason to let the application fail (and the user lose his/her work, etc.). I'd recommend a combination of asserts and defensive programming:

ptr = dynamic_cast(obj);
ASSERT(ptr);
if(ptr)
{
   // do stuff
}