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)
5 #include <boost/hana/integral_constant.hpp>
9 namespace hana = boost::hana;
13 static_assert(hana::size_c<0>() == 0, "");
14 static_assert(hana::size_c<1>() == 1, "");
15 static_assert(hana::int_c<-3>() == -3, "");
17 // decltype(operator())
18 static_assert(std::is_same<decltype(hana::size_c<0>()), std::size_t>{}, "");
19 static_assert(std::is_same<decltype(hana::int_c<-3>()), int>{}, "");
22 constexpr std::size_t a = hana::size_c<0>, b = hana::size_c<1>;
23 static_assert(a == 0 && b == 1, "");
25 constexpr int c = hana::int_c<0>, d = hana::int_c<-3>;
26 static_assert(c == 0 && d == -3, "");
29 static_assert(decltype(hana::int_c<1>)::value == 1, "");
32 static_assert(std::is_same<
33 decltype(hana::int_c<1>)::type,
34 std::remove_cv_t<decltype(hana::int_c<1>)>
37 // nested ::value_type
38 static_assert(std::is_same<decltype(hana::int_c<1>)::value_type, int>{}, "");
40 // inherits from std::integral_constant
41 static_assert(std::is_base_of<std::integral_constant<int, 3>,
42 hana::integral_constant<int, 3>>{}, "");