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... Types>
class Tuple;
// recursive case:
template<typename Head, typename... Tail>
class Tuple<Head, Tail...>
{
private:
Head head;
Tuple<Tail...> tail;
public:
// constructors:
Tuple() {
}
Tuple(Head const& head, Tuple<Tail...> const& tail)
: head(head), tail(tail) {
}
//...
Head& getHead() { return head; }
Head const& getHead() const { return head; }
Tuple<Tail...>& getTail() { return tail; }
Tuple<Tail...> const& getTail() const { return tail; }
};
// basis case:
template<>
class Tuple<> {
// no storage required
};