The following code example is taken from the book
C++ Templates - The Complete Guide, 2nd Edition
by David Vandevoorde, Nicolai M. Josuttis, and Douglas Gregor,
Addison-Wesley, 2017
© Copyright David Vandevoorde, Nicolai M. Josuttis, Douglas Gregor 2017
template<typename List, typename Element>
class PushFrontT {
public:
using Type = Cons<Element, List>;
};
template<typename List, typename Element>
using PushFront = typename PushFrontT<List, Element>::Type;