Extending enum in derived classes

Question

I have a class hierarchy, and each class in it has an exception class, derived in a parallel hierarchy, thus...

class Base
{
};

class Derived : public Base
{
};         


        

Answer 1

The "reason" of the exception is most likely something that needs to be shown to the user or to be logged, so a string seems more appropriate, so it can be used in what().
If it is more than that, more subclassing is needed.