index-tuple.h

template <size_t N> struct index_tuple_from_N;

template <size_t... I> struct index_tuple_t {
    enum {
        count = sizeof... (I),
        last = count - 1,
        first = 0,
    };

    using grow = index_tuple_t < I ..., last + 1 > ;
    using shrink = typename index_tuple_from_N < count - 1 >::make ;
};

template <size_t N> struct index_tuple_from_N {
    using make = typename index_tuple_from_N<N - 1>::make::grow;
};
template <> struct index_tuple_from_N<1> {
    using make = index_tuple_t < 0 > ;
};
template <> struct index_tuple_from_N<0> {
    using make = void; // A trick to shut up the compiler. Actually it never reaches this 'make'
};