1 // Copyright Louis Dionne 2013-2017 2 // Distributed under the Boost Software License, Version 1.0. 3 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) 4 5 //! [main] 6 #include <boost/hana/ext/std/tuple.hpp> 7 #include <boost/hana/front.hpp> 8 #include <tuple> // still required to create a tuple 9 namespace hana = boost::hana; 10 11 main()12int main() { 13 constexpr std::tuple<int, char, float> xs{1, '2', 3.0f}; 14 static_assert(hana::front(xs) == 1, ""); 15 } 16 //! [main] 17