Can I get polymorphic behavior without using virtual functions?

Question

Because of my device I can\'t use virtual functions. Suppose I have:

class Base
{
    void doSomething() { }
};

class Derived : public Base
{
    void doSom         


        

Answer 1

I think it is possible with CRTP (if your 'Device' supports Templates).

#include 

template struct base{
    void g(){
        if(T *p = static_cast(this)){
            p->f();
        }
    }
    void f(){volatile int v = 0; std::cout << 1;}
    virtual ~base(){}
};

struct derived1 : base{
    void f(){std::cout << 2;}
};

struct derived2 : base{
    void f(){std::cout << 3;}
};

int main(){
    derived1 d1;
    d1.g();

    derived2 d2;
    d2.g();
}