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 T>
struct AddLValueReferenceT {
using Type = T&;
};
template<typename T>
using AddLValueReference = typename AddLValueReferenceT<T>::Type;
template<typename T>
struct AddRValueReferenceT {
using Type = T&&;
};
template<typename T>
using AddRValueReference = typename AddRValueReferenceT<T>::Type;