1
2 // Copyright 2015, 2017 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
main()22 int main()
23 {
24 using boost::mp11::mp_list;
25 using boost::mp11::mp_replace_front;
26 using boost::mp11::mp_replace_first;
27
28 {
29 using L1 = mp_list<X1>;
30
31 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L1, void>, mp_list<void>>));
32 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L1, void>, mp_list<void>>));
33
34 using L2 = mp_list<X1, X2>;
35
36 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L2, void>, mp_list<void, X2>>));
37 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L2, void>, mp_list<void, X2>>));
38
39 using L3 = mp_list<X1, X2, X3>;
40
41 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L3, void>, mp_list<void, X2, X3>>));
42 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L3, void>, mp_list<void, X2, X3>>));
43
44 using L4 = mp_list<X1, X2, X3, X4>;
45
46 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L4, void>, mp_list<void, X2, X3, X4>>));
47 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L4, void>, mp_list<void, X2, X3, X4>>));
48 }
49
50 {
51 using L1 = std::tuple<X1>;
52
53 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L1, void>, std::tuple<void>>));
54 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L1, void>, std::tuple<void>>));
55
56 using L2 = std::tuple<X1, X2>;
57
58 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L2, void>, std::tuple<void, X2>>));
59 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L2, void>, std::tuple<void, X2>>));
60
61 using L3 = std::tuple<X1, X2, X3>;
62
63 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L3, void>, std::tuple<void, X2, X3>>));
64 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L3, void>, std::tuple<void, X2, X3>>));
65
66 using L4 = std::tuple<X1, X2, X3, X4>;
67
68 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L4, void>, std::tuple<void, X2, X3, X4>>));
69 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L4, void>, std::tuple<void, X2, X3, X4>>));
70 }
71
72 {
73 using L2 = std::pair<X1, X2>;
74
75 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L2, void>, std::pair<void, X2>>));
76 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L2, void>, std::pair<void, X2>>));
77 }
78
79 return boost::report_errors();
80 }
81