ceph/src/boost/libs/hana/example/tutorial/include_ext.cpp

   1 // Copyright Louis Dionne 2013-2016
   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
  12 int main() {
  13   constexpr std::tuple<int, char, float> xs{1, '2', 3.0f};
  14   static_assert(hana::front(xs) == 1, "");
  15 }
  16 //! [main]