use static assert to check if the template parameter is a class derived of another one.

static_assert_is_base_of.cpp

#include <iostream>

struct A {} ;
struct B: public A {};

template<class T>
struct C {
	static_assert(std::is_base_of<A, T>::value, "Wrong class parameter");
};

int main() {
	// your code goes here
	C<B> b;
	C<A> a;
	C<int> c;
	return 0;
}