Inheriting from std::runtime_error

Question

I'm coding my own Exception class:

class Exception : public std::runtime_error{

}

And I would like overload what() . How can I do that?

Also, what do I have to keep in mind when inheriting from std::runtime_error ?

Answer 1

I think that as what is part of the runtime_error I believe it's virtual, so to overload it, you'd need to create a method with the exact same method signature. So if you point your browser to: http://www.cplusplus.com/reference/exception/exception/ then you'll see the definition of what()

So to overload it you'll need to do something like this in your header file:

class Exception : public runtime_error
{
    public:
        const char* what() const throw();
}

then you'd define it thus in your cpp file:

const char* Exception::what() const throw()
{
    // do stuff
}

Hope it helps...