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1 | // Copyright Louis Dionne 2013-2016 |
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 | #ifndef BOOST_HANA_TEST_AUTO_DROP_BACK_HPP | |
6 | #define BOOST_HANA_TEST_AUTO_DROP_BACK_HPP | |
7 | ||
8 | #include <boost/hana/assert.hpp> | |
9 | #include <boost/hana/drop_back.hpp> | |
10 | #include <boost/hana/equal.hpp> | |
11 | #include <boost/hana/integral_constant.hpp> | |
12 | ||
13 | #include <laws/base.hpp> | |
14 | #include "test_case.hpp" | |
15 | ||
16 | ||
17 | TestCase test_drop_back{[]{ | |
18 | namespace hana = boost::hana; | |
19 | using hana::test::ct_eq; | |
20 | ||
21 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
22 | hana::drop_back(MAKE_TUPLE(), hana::size_c<0>), | |
23 | MAKE_TUPLE() | |
24 | )); | |
25 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
26 | hana::drop_back(MAKE_TUPLE(), hana::size_c<1>), | |
27 | MAKE_TUPLE() | |
28 | )); | |
29 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
30 | hana::drop_back(MAKE_TUPLE(), hana::size_c<2>), | |
31 | MAKE_TUPLE() | |
32 | )); | |
33 | ||
34 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
35 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}), hana::size_c<0>), | |
36 | MAKE_TUPLE(ct_eq<0>{}) | |
37 | )); | |
38 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
39 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}), hana::size_c<1>), | |
40 | MAKE_TUPLE() | |
41 | )); | |
42 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
43 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}), hana::size_c<2>), | |
44 | MAKE_TUPLE() | |
45 | )); | |
46 | ||
47 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
48 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}), hana::size_c<0>), | |
49 | MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}) | |
50 | )); | |
51 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
52 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}), hana::size_c<1>), | |
53 | MAKE_TUPLE(ct_eq<0>{}) | |
54 | )); | |
55 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
56 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}), hana::size_c<2>), | |
57 | MAKE_TUPLE() | |
58 | )); | |
59 | ||
60 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
61 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::size_c<0>), | |
62 | MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}) | |
63 | )); | |
64 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
65 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::size_c<1>), | |
66 | MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}) | |
67 | )); | |
68 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
69 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::size_c<2>), | |
70 | MAKE_TUPLE(ct_eq<0>{}) | |
71 | )); | |
72 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
73 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::size_c<3>), | |
74 | MAKE_TUPLE() | |
75 | )); | |
76 | ||
77 | // make sure hana::drop_back(xs) == hana::drop_back(xs, hana::size_c<1>) | |
78 | BOOST_HANA_CHECK(hana::equal( | |
79 | hana::drop_back(MAKE_TUPLE()), | |
80 | hana::drop_back(MAKE_TUPLE(), hana::size_c<1>) | |
81 | )); | |
82 | ||
83 | BOOST_HANA_CHECK(hana::equal( | |
84 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{})), | |
85 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}), hana::size_c<1>) | |
86 | )); | |
87 | ||
88 | BOOST_HANA_CHECK(hana::equal( | |
89 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{})), | |
90 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}), hana::size_c<1>) | |
91 | )); | |
92 | ||
93 | BOOST_HANA_CHECK(hana::equal( | |
94 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<2>{})), | |
95 | hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<2>{}), hana::size_c<1>) | |
96 | )); | |
97 | }}; | |
98 | ||
99 | #endif // !BOOST_HANA_TEST_AUTO_DROP_BACK_HPP |