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/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 main()18int main() { } 19