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b32b8144 1// Copyright Louis Dionne 2013-2017
7c673cae
FG
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
7#include <cstddef>
8#include <type_traits>
9namespace hana = boost::hana;
10
11
12// operator()
13static_assert(hana::size_c<0>() == 0, "");
14static_assert(hana::size_c<1>() == 1, "");
15static_assert(hana::int_c<-3>() == -3, "");
16
17// decltype(operator())
18static_assert(std::is_same<decltype(hana::size_c<0>()), std::size_t>{}, "");
19static_assert(std::is_same<decltype(hana::int_c<-3>()), int>{}, "");
20
21// conversions
22constexpr std::size_t a = hana::size_c<0>, b = hana::size_c<1>;
23static_assert(a == 0 && b == 1, "");
24
25constexpr int c = hana::int_c<0>, d = hana::int_c<-3>;
26static_assert(c == 0 && d == -3, "");
27
28// nested ::value
29static_assert(decltype(hana::int_c<1>)::value == 1, "");
30
31// nested ::type
32static_assert(std::is_same<
33 decltype(hana::int_c<1>)::type,
34 std::remove_cv_t<decltype(hana::int_c<1>)>
35>{}, "");
36
37// nested ::value_type
38static_assert(std::is_same<decltype(hana::int_c<1>)::value_type, int>{}, "");
39
40// inherits from std::integral_constant
41static_assert(std::is_base_of<std::integral_constant<int, 3>,
42 hana::integral_constant<int, 3>>{}, "");
43
44int main() { }