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f51cf556 | 1 | // Copyright Louis Dionne 2013-2022 |
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/ext/std/integral_constant.hpp> | |
6 | ||
7 | #include <boost/hana/core/tag_of.hpp> | |
8 | ||
9 | #include <type_traits> | |
10 | namespace hana = boost::hana; | |
11 | ||
12 | ||
13 | struct inherit_simple : std::integral_constant<int, 3> { }; | |
14 | struct inherit_no_default : std::integral_constant<int, 3> { | |
15 | inherit_no_default() = delete; | |
16 | }; | |
17 | ||
18 | struct incomplete; | |
19 | struct empty_type { }; | |
20 | struct non_pod { virtual ~non_pod() { } }; | |
21 | ||
22 | ||
23 | static_assert(std::is_same< | |
24 | hana::tag_of_t<inherit_simple>, | |
25 | hana::ext::std::integral_constant_tag<int> | |
26 | >{}, ""); | |
27 | static_assert(std::is_same< | |
28 | hana::tag_of_t<inherit_no_default>, | |
29 | hana::ext::std::integral_constant_tag<int> | |
30 | >{}, ""); | |
31 | static_assert(std::is_same< | |
32 | hana::tag_of_t<std::is_pointer<int*>>, | |
33 | hana::ext::std::integral_constant_tag<bool> | |
34 | >{}, ""); | |
35 | ||
36 | static_assert(!std::is_same< | |
37 | hana::tag_of_t<incomplete>, | |
38 | hana::ext::std::integral_constant_tag<int> | |
39 | >{}, ""); | |
40 | static_assert(!std::is_same< | |
41 | hana::tag_of_t<empty_type>, | |
42 | hana::ext::std::integral_constant_tag<int> | |
43 | >{}, ""); | |
44 | static_assert(!std::is_same< | |
45 | hana::tag_of_t<non_pod>, | |
46 | hana::ext::std::integral_constant_tag<int> | |
47 | >{}, ""); | |
48 | static_assert(!std::is_same< | |
49 | hana::tag_of_t<void>, | |
50 | hana::ext::std::integral_constant_tag<int> | |
51 | >{}, ""); | |
52 | ||
53 | int main() { } |