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... Elements, unsigned... Indices>
auto select(Tuple<Elements...> const& t,
Valuelist<unsigned, Indices...>)
{
return makeTuple(get<Indices>(t)...);
}