enabler.cpp

#include <type_traits>
#include <initializer_list>
#include <iostream>

class enable_class
{
public:
  template <typename ... Types, typename std::enable_if_t<sizeof...(Types) == 2, std::nullptr_t> = nullptr>
  enable_class(Types... args)
  {
    using swallow = std::initializer_list<int>;
    (void)swallow{(void(this->initialize(args)), 0)...};
  }
private:
  void
  initialize(int a)
  {
    std::cout << a << std::endl;
  }

};


int
main(void)
{
  enable_class e(1, 2);
}