C++: Expand array elements as parameter of a function using boost::hana

I discovered two months ago boost::hana. Seems very powerfull so I decided to take a look. From the documentation I saw this examples:

std::string s;
hana::int_c<10>.times([&]{ s += "x"; });

that is equivalent to:

s += "x"; s += "x"; ... s += "x"; // 10 times

I'd like to know if it is possible (and if yes how) to write smthg like:

std::string s;
std::array<int, 10> xs = {1, 3, 5, ...};
hana::int_c<10>.times([&](int i){ s += std::to_string(xs[i]) + ","; });

a sort of "unpacking" at compile time, or even:

myfunction( hana::unpack<...>( xs ) );