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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/detail/variadic/at.hpp> | |
6 | ||
7 | #include <boost/hana/assert.hpp> | |
8 | #include <boost/hana/equal.hpp> | |
9 | ||
10 | #include <laws/base.hpp> | |
11 | namespace hana = boost::hana; | |
12 | namespace vd = hana::detail::variadic; | |
13 | using hana::test::ct_eq; | |
14 | ||
15 | ||
16 | struct non_pod { virtual ~non_pod() { } }; | |
17 | ||
18 | template <int i> struct y { }; | |
19 | ||
20 | int main() { | |
21 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
22 | vd::at<0>(ct_eq<0>{}), | |
23 | ct_eq<0>{} | |
24 | )); | |
25 | ||
26 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
27 | vd::at<0>(ct_eq<0>{}, ct_eq<1>{}), | |
28 | ct_eq<0>{} | |
29 | )); | |
30 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
31 | vd::at<1>(y<0>{}, ct_eq<1>{}), | |
32 | ct_eq<1>{} | |
33 | )); | |
34 | ||
35 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
36 | vd::at<0>(ct_eq<0>{}, y<1>{}, y<2>{}), | |
37 | ct_eq<0>{} | |
38 | )); | |
39 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
40 | vd::at<1>(y<0>{}, ct_eq<1>{}, y<2>{}), | |
41 | ct_eq<1>{} | |
42 | )); | |
43 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
44 | vd::at<2>(y<0>{}, y<1>{}, ct_eq<2>{}), | |
45 | ct_eq<2>{} | |
46 | )); | |
47 | ||
48 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
49 | vd::at<0>(ct_eq<0>{}, y<1>{}, y<2>{}, y<3>{}), | |
50 | ct_eq<0>{} | |
51 | )); | |
52 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
53 | vd::at<1>(y<0>{}, ct_eq<1>{}, y<2>{}, y<3>{}), | |
54 | ct_eq<1>{} | |
55 | )); | |
56 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
57 | vd::at<2>(y<0>{}, y<1>{}, ct_eq<2>{}, y<3>{}), | |
58 | ct_eq<2>{} | |
59 | )); | |
60 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
61 | vd::at<3>(y<0>{}, y<1>{}, y<2>{}, ct_eq<3>{}), | |
62 | ct_eq<3>{} | |
63 | )); | |
64 | ||
65 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
66 | vd::at<0>(ct_eq<0>{}, y<1>{}, y<2>{}, y<3>{}, y<4>{}), | |
67 | ct_eq<0>{} | |
68 | )); | |
69 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
70 | vd::at<1>(y<0>{}, ct_eq<1>{}, y<2>{}, y<3>{}, y<4>{}), | |
71 | ct_eq<1>{} | |
72 | )); | |
73 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
74 | vd::at<2>(y<0>{}, y<1>{}, ct_eq<2>{}, y<3>{}, y<4>{}), | |
75 | ct_eq<2>{} | |
76 | )); | |
77 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
78 | vd::at<3>(y<0>{}, y<1>{}, y<2>{}, ct_eq<3>{}, y<4>{}), | |
79 | ct_eq<3>{} | |
80 | )); | |
81 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
82 | vd::at<4>(y<0>{}, y<1>{}, y<2>{}, y<3>{}, ct_eq<4>{}), | |
83 | ct_eq<4>{} | |
84 | )); | |
85 | ||
86 | // make sure we can use non-pods on both side of the fetched object | |
87 | vd::at<0>(ct_eq<0>{}, non_pod{}); | |
88 | vd::at<1>(non_pod{}, ct_eq<1>{}); | |
89 | ||
90 | // make sure it works with const objects | |
91 | int const i = 1; | |
92 | vd::at<0>(i); | |
93 | } |