ceph/src/boost/libs/hana/example/type/integral.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 #include <boost/hana/assert.hpp>
   6 #include <boost/hana/ext/std/integral_constant.hpp>
   7 #include <boost/hana/not.hpp>
   8 #include <boost/hana/type.hpp>
   9
  10 #include <type_traits>
  11 namespace hana = boost::hana;
  12
  13
  14 constexpr auto is_void = hana::integral(hana::metafunction<std::is_void>);
  15 BOOST_HANA_CONSTANT_CHECK(is_void(hana::type_c<void>));
  16 BOOST_HANA_CONSTANT_CHECK(hana::not_(is_void(hana::type_c<int>)));
  17
  18 int main() { }