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template<class ... Types> struct Tuple {}; A parameter pack is a template parameter accepting zero or more template arguments. If a template has at least one parameter pack is a variadic template.

The pattern parameter_pack ... is expanded into a list of comma-separated substitutions of parameter_pack with each one of its parameters template<class T> // Base of recursion void variadic_printer(T last_argument) { std::cout << last_argument; } template<class T, class .....