#include <iostream>
using namespace std;
 
template <const int EVENT>
class Special {
  public:
	virtual ~Special() = default;
 
  protected:
	Special() {
		call();
	}
	virtual void call() = 0;
};
 
class Test : public Special<0>, public Special<2> {
  private:
	void call() override;
};
 
template<>
void Test::Special<0>::call() {
	cout << "Call to Special<0>'s call" << endl;
}
 
template<>
void Test::Special<2>::call() {
	cout << "Call to Special<2>'s call" << endl;
}
 
int main() {
	Test t;  // Calls constructors
	return 0;
}

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