C++ unique static id and class name with base class

Question

Having class TaskBase, each derived class of it must have name and unique id.

The TaskBase is something like below:

class TaskB         


        

Answer 1

If you are following strictly standard C++, you may need to just bite the bullet and do some additional bookkeeping. Make an enum somewhere that stores all the classnames:

enum ClassID {
    MYTASK1_CLASS,
    MYTASK2_CLASS
};

It doesn't take that long to add a new classId when you make a new class.

I've done this before. It's sufficient for uniqueness to do what I describe above. But... if the enum values are set with a clever enough macro, you can encode the hierarchy of the classes, and implement dynamic cast and instanceof solely from the ClassID and a bitwise mask!