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/mp11/integral.hpp>
13 #include <boost/mp11/utility.hpp>
14 #include <boost/core/lightweight_test_trait.hpp>
15 #include <type_traits>
16 #include <tuple>
17
18 struct X1 {};
19 struct X2 {};
20 struct X3 {};
21 struct X4 {};
22
23 template<class T1, class T2> struct F {};
24
main()25 int main()
26 {
27 using boost::mp11::mp_list;
28 using boost::mp11::mp_fold_q;
29 using boost::mp11::mp_quote;
30
31 using Q = mp_quote<F>;
32
33 {
34 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<mp_list<>, void, Q>, void>));
35 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<mp_list<X1>, void, Q>, F<void, X1>>));
36 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<mp_list<X1, X2>, void, Q>, F<F<void, X1>, X2>>));
37 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<mp_list<X1, X2, X3>, void, Q>, F<F<F<void, X1>, X2>, X3>>));
38 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<mp_list<X1, X2, X3, X4>, void, Q>, F<F<F<F<void, X1>, X2>, X3>, X4>>));
39 }
40
41 {
42 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<>, void, Q>, void>));
43 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<X1>, void, Q>, F<void, X1>>));
44 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<X1, X2>, void, Q>, F<F<void, X1>, X2>>));
45 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<X1, X2, X3>, void, Q>, F<F<F<void, X1>, X2>, X3>>));
46 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<X1, X2, X3, X4>, void, Q>, F<F<F<F<void, X1>, X2>, X3>, X4>>));
47 }
48
49 using boost::mp11::mp_push_back;
50
51 {
52 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<X1, X2, X3, X4>, mp_list<>, mp_quote<mp_push_back>>, mp_list<X1, X2, X3, X4>>));
53 }
54
55 using boost::mp11::mp_push_front;
56
57 {
58 BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<X1, X2, X3, X4>, mp_list<>, mp_quote<mp_push_front>>, mp_list<X4, X3, X2, X1>>));
59 }
60
61 return boost::report_errors();
62 }
63