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/core/lightweight_test_trait.hpp>
13 #include <type_traits>
14 #include <tuple>
15 #include <utility>
16
17 struct X1 {};
18 struct X2 {};
19 struct X3 {};
20 struct X4 {};
21
22 struct Y1 {};
23 struct Y2 {};
24 struct Y3 {};
25 struct Y4 {};
26
27 struct Z1 {};
28 struct Z2 {};
29 struct Z3 {};
30 struct Z4 {};
31
32 struct U1 {};
33 struct U2 {};
34
35 struct V1 {};
36 struct V2 {};
37
38 struct W1 {};
39 struct W2 {};
40
41 template<class T> using add_pointer = typename std::add_pointer<T>::type;
42 template<class T, class U> using is_same = typename std::is_same<T, U>::type;
43
main()44 int main()
45 {
46 using boost::mp11::mp_list;
47 using boost::mp11::mp_transform;
48
49 using L1 = mp_list<X1, X2, X3, X4>;
50
51 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<mp_list, L1>, mp_list<mp_list<X1>, mp_list<X2>, mp_list<X3>, mp_list<X4>>>));
52 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<std::tuple, L1>, mp_list<std::tuple<X1>, std::tuple<X2>, std::tuple<X3>, std::tuple<X4>>>));
53 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<std::add_pointer, L1>, mp_list<std::add_pointer<X1>, std::add_pointer<X2>, std::add_pointer<X3>, std::add_pointer<X4>>>));
54 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<add_pointer, L1>, mp_list<X1*, X2*, X3*, X4*>>));
55
56 using L2 = std::tuple<Y1, Y2, Y3, Y4>;
57
58 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<mp_list, L1, L2>, mp_list<mp_list<X1, Y1>, mp_list<X2, Y2>, mp_list<X3, Y3>, mp_list<X4, Y4>>>));
59 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<std::tuple, L1, L2>, mp_list<std::tuple<X1, Y1>, std::tuple<X2, Y2>, std::tuple<X3, Y3>, std::tuple<X4, Y4>>>));
60 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<std::pair, L1, L2>, mp_list<std::pair<X1, Y1>, std::pair<X2, Y2>, std::pair<X3, Y3>, std::pair<X4, Y4>>>));
61
62 using L3 = mp_list<Z1, Z2, Z3, Z4>;
63
64 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<mp_list, L1, L2, L3>, mp_list<mp_list<X1, Y1, Z1>, mp_list<X2, Y2, Z2>, mp_list<X3, Y3, Z3>, mp_list<X4, Y4, Z4>>>));
65 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<std::tuple, L1, L2, L3>, mp_list<std::tuple<X1, Y1, Z1>, std::tuple<X2, Y2, Z2>, std::tuple<X3, Y3, Z3>, std::tuple<X4, Y4, Z4>>>));
66
67 //
68
69 using L4 = std::tuple<X1, Y2, X3, Y4>;
70
71 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<is_same, L1, L1>, mp_list<std::true_type, std::true_type, std::true_type, std::true_type>>));
72 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<is_same, L1, L2>, mp_list<std::false_type, std::false_type, std::false_type, std::false_type>>));
73 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<is_same, L1, L4>, mp_list<std::true_type, std::false_type, std::true_type, std::false_type>>));
74
75 //
76
77 using L5 = std::pair<X1, X2>;
78 using L6 = std::pair<Y1, Y2>;
79 using L7 = std::pair<X1, Y2>;
80
81 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<mp_list, L5>, std::pair<mp_list<X1>, mp_list<X2>>>));
82 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<mp_list, L5, L6>, std::pair<mp_list<X1, Y1>, mp_list<X2, Y2>>>));
83 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<mp_list, L5, L6, L7>, std::pair<mp_list<X1, Y1, X1>, mp_list<X2, Y2, Y2>>>));
84
85 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<add_pointer, L5>, std::pair<X1*, X2*>>));
86
87 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<is_same, L5, L5>, std::pair<std::true_type, std::true_type>>));
88 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<is_same, L5, L6>, std::pair<std::false_type, std::false_type>>));
89 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<is_same, L5, L7>, std::pair<std::true_type, std::false_type>>));
90
91 //
92
93 using L8 = std::pair<Z1, Z2>;
94 using L9 = std::pair<U1, U2>;
95 using L10 = std::pair<V1, V2>;
96 using L11 = std::pair<W1, W2>;
97
98 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<std::tuple, L5, L6, L8, L9>, std::pair<std::tuple<X1, Y1, Z1, U1>, std::tuple<X2, Y2, Z2, U2>>>));
99 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<std::tuple, L5, L6, L8, L9, L10>, std::pair<std::tuple<X1, Y1, Z1, U1, V1>, std::tuple<X2, Y2, Z2, U2, V2>>>));
100 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_transform<std::tuple, L5, L6, L8, L9, L10, L11>, std::pair<std::tuple<X1, Y1, Z1, U1, V1, W1>, std::tuple<X2, Y2, Z2, U2, V2, W2>>>));
101
102 //
103
104 return boost::report_errors();
105 }
106