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1 | |
2 | // Copyright 2015 Peter Dimov. | |
3 | // | |
4 | // Distributed under the Boost Software License, Version 1.0. | |
5 | // | |
6 | // See accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt | |
8 | ||
9 | ||
10 | #include <boost/mp11/algorithm.hpp> | |
11 | #include <boost/mp11/list.hpp> | |
12 | #include <boost/mp11/integral.hpp> | |
13 | #include <boost/core/lightweight_test_trait.hpp> | |
14 | #include <type_traits> | |
15 | #include <tuple> | |
16 | #include <utility> | |
17 | ||
18 | struct X1 {}; | |
19 | struct X2 {}; | |
20 | struct X3 {}; | |
21 | struct X4 {}; | |
22 | struct X5 {}; | |
23 | ||
24 | int main() | |
25 | { | |
26 | using boost::mp11::mp_list; | |
27 | using boost::mp11::mp_drop; | |
28 | using boost::mp11::mp_drop_c; | |
29 | using boost::mp11::mp_size_t; | |
30 | ||
31 | { | |
32 | using L1 = mp_list<>; | |
33 | ||
34 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L1, 0>, L1>)); | |
35 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L1, mp_size_t<0>>, L1>)); | |
36 | ||
37 | using L2 = mp_list<X1, X2, X3, X4, X5>; | |
38 | ||
39 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L2, 0>, mp_list<X1, X2, X3, X4, X5>>)); | |
40 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L2, 1>, mp_list<X2, X3, X4, X5>>)); | |
41 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L2, 2>, mp_list<X3, X4, X5>>)); | |
42 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L2, 3>, mp_list<X4, X5>>)); | |
43 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L2, 4>, mp_list<X5>>)); | |
44 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L2, 5>, mp_list<>>)); | |
45 | ||
46 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L2, mp_size_t<0>>, mp_list<X1, X2, X3, X4, X5>>)); | |
47 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L2, mp_size_t<1>>, mp_list<X2, X3, X4, X5>>)); | |
48 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L2, mp_size_t<2>>, mp_list<X3, X4, X5>>)); | |
49 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L2, mp_size_t<3>>, mp_list<X4, X5>>)); | |
50 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L2, mp_size_t<4>>, mp_list<X5>>)); | |
51 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L2, mp_size_t<5>>, mp_list<>>)); | |
52 | } | |
53 | ||
54 | { | |
55 | using L1 = std::tuple<>; | |
56 | ||
57 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L1, 0>, L1>)); | |
58 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L1, mp_size_t<0>>, L1>)); | |
59 | ||
60 | using L2 = std::tuple<X1, X2, X3, X4, X5>; | |
61 | ||
62 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L2, 0>, std::tuple<X1, X2, X3, X4, X5>>)); | |
63 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L2, 1>, std::tuple<X2, X3, X4, X5>>)); | |
64 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L2, 2>, std::tuple<X3, X4, X5>>)); | |
65 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L2, 3>, std::tuple<X4, X5>>)); | |
66 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L2, 4>, std::tuple<X5>>)); | |
67 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L2, 5>, std::tuple<>>)); | |
68 | ||
69 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L2, mp_size_t<0>>, std::tuple<X1, X2, X3, X4, X5>>)); | |
70 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L2, mp_size_t<1>>, std::tuple<X2, X3, X4, X5>>)); | |
71 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L2, mp_size_t<2>>, std::tuple<X3, X4, X5>>)); | |
72 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L2, mp_size_t<3>>, std::tuple<X4, X5>>)); | |
73 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L2, mp_size_t<4>>, std::tuple<X5>>)); | |
74 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L2, mp_size_t<5>>, std::tuple<>>)); | |
75 | } | |
76 | ||
77 | { | |
78 | using L1 = std::pair<X1, X2>; | |
79 | ||
80 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop_c<L1, 0>, L1>)); | |
81 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_drop<L1, mp_size_t<0>>, L1>)); | |
82 | } | |
83 | ||
84 | return boost::report_errors(); | |
85 | } |