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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_take; | |
28 | using boost::mp11::mp_take_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_take_c<L1, 0>, L1>)); | |
35 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<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_take_c<L2, 0>, mp_list<>>)); | |
40 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 1>, mp_list<X1>>)); | |
41 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 2>, mp_list<X1, X2>>)); | |
42 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 3>, mp_list<X1, X2, X3>>)); | |
43 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 4>, mp_list<X1, X2, X3, X4>>)); | |
44 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 5>, mp_list<X1, X2, X3, X4, X5>>)); | |
45 | ||
46 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<0>>, mp_list<>>)); | |
47 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<1>>, mp_list<X1>>)); | |
48 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<2>>, mp_list<X1, X2>>)); | |
49 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<3>>, mp_list<X1, X2, X3>>)); | |
50 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<4>>, mp_list<X1, X2, X3, X4>>)); | |
51 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<5>>, mp_list<X1, X2, X3, X4, X5>>)); | |
52 | ||
53 | using L3 = mp_list<X1, X2, X3, X4, X5, X1, X2, X3, X4, X5, X1, X2, X3, X4, X5, X1, X2, X3, X4, X5>; | |
54 | ||
55 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L3, 8>, mp_list<X1, X2, X3, X4, X5, X1, X2, X3>>)); | |
56 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L3, mp_size_t<9>>, mp_list<X1, X2, X3, X4, X5, X1, X2, X3, X4>>)); | |
57 | } | |
58 | ||
59 | { | |
60 | using L1 = std::tuple<>; | |
61 | ||
62 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L1, 0>, L1>)); | |
63 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L1, mp_size_t<0>>, L1>)); | |
64 | ||
65 | using L2 = std::tuple<X1, X2, X3, X4, X5>; | |
66 | ||
67 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 0>, std::tuple<>>)); | |
68 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 1>, std::tuple<X1>>)); | |
69 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 2>, std::tuple<X1, X2>>)); | |
70 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 3>, std::tuple<X1, X2, X3>>)); | |
71 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 4>, std::tuple<X1, X2, X3, X4>>)); | |
72 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 5>, std::tuple<X1, X2, X3, X4, X5>>)); | |
73 | ||
74 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<0>>, std::tuple<>>)); | |
75 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<1>>, std::tuple<X1>>)); | |
76 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<2>>, std::tuple<X1, X2>>)); | |
77 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<3>>, std::tuple<X1, X2, X3>>)); | |
78 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<4>>, std::tuple<X1, X2, X3, X4>>)); | |
79 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<5>>, std::tuple<X1, X2, X3, X4, X5>>)); | |
80 | ||
81 | using L3 = std::tuple<X1, X2, X3, X4, X5, X1, X2, X3, X4, X5, X1, X2, X3, X4, X5, X1, X2, X3, X4, X5>; | |
82 | ||
83 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L3, 8>, std::tuple<X1, X2, X3, X4, X5, X1, X2, X3>>)); | |
84 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L3, mp_size_t<9>>, std::tuple<X1, X2, X3, X4, X5, X1, X2, X3, X4>>)); | |
85 | } | |
86 | ||
87 | { | |
88 | using L1 = std::pair<X1, X2>; | |
89 | ||
90 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L1, 2>, L1>)); | |
91 | BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L1, mp_size_t<2>>, L1>)); | |
92 | } | |
93 | ||
94 | return boost::report_errors(); | |
95 | } |