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
#include "removecv.hpp"
template<typename T>
struct DecayT : RemoveCVT<T> {
};
template<typename T>
struct DecayT<T[]> {
using Type = T*;
};
template<typename T, std::size_t N>
struct DecayT<T[N]> {
using Type = T*;
};
template<typename R, typename... Args>
struct DecayT<R(Args...)> {
using Type = R (*)(Args...);
};
template<typename R, typename... Args>
struct DecayT<R(Args..., ...)> {
using Type = R (*)(Args..., ...);
};