class Machine{
void makeIntersection(Machine const& other)
virtual someFunc()=0;
}

class DFA: public Machine{
}

class NFA: public Machine{
}

// I WANT THIS FUNCTION TO HAVE THE ABILLITY, THAT 'Machine' CAN BE EVERY DERIVED CLASS WITHOUT WRITING THE METHOD SEPARETLY IN EVERY
//DERIVED CLASS
void Machine::makeIntersection(Machine const& other) //this is giving me an error because I can't construct an abstract class object
{
    auto test = [this, other](std::string const& a, std::string const& b)->bool
    {
        if (this->isFinalState(a) && other.isFinalState(b))return true;
        return false;
    };
    this->makeStates(other, test);
}