ceph/src/boost/libs/hana/example/value.cpp

   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 #include <boost/hana/integral_constant.hpp>
   6 #include <boost/hana/value.hpp>
   7 namespace hana = boost::hana;
   8
   9
  10 int main() {
  11     auto i = hana::integral_c<int, 3>; // notice no constexpr
  12     static_assert(hana::value<decltype(i)>() == 3, "");
  13     static_assert(hana::value(i) == 3, "value(i) is always a constant expression!");
  14 }