CRTP aka static polymorphism

crtp.cc

#include <iostream>

// CRTP aka static polymorphism

using namespace std;

template<typename T> class Base {
public:
        void bla() {
                auto derived = static_cast<T&>(*this);
                derived.laber();
        }
};
class Derived: public Base<Derived> {
public:
        void laber() { cout << "laber" << endl; }
};

class Derived2: public Base<Derived2> {
public:
        void laber() { cout << "laber2" << endl; }
};

template<typename T>
void hurz(T* base) {
        base->bla();
}

void crtp() {
        auto base1 = new Derived();
        hurz(base1);
        auto base2 = new Derived2();
        hurz(base2);
}

int main() {
        crtp();
}