#include <iostream>
 
class SomeA
{
public:
	SomeA(int param1)
	{
		std::cout << "SomeA: " << param1 << std::endl;
	}
};
 
class SomeB
{
public:
	SomeB(int p1, int p2)
	{
		std::cout << "SomeB: " <<  p1 << " "<< p2 << std::endl;
	}
};
 
class SomeC
{
public:
	SomeC(int p1, int p2, bool p3)
	{
		std::cout << "SomeC: " << p1 << " " << p2 << " " << p3 << std::endl;
	}
};
 
 
template<class T>
class X : public T
{
public:
	template<class...U>
	X(U... args) 
	: T(args...)
	{ 
	}
};
 
int main()
{
	X<SomeC> c(1, 2, false);
	return 0;
}

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