1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// <algorithm>
10
11// template<InputIterator Iter1, InputIterator Iter2>
12// requires HasLess<Iter1::value_type, Iter2::value_type>
13// && HasLess<Iter2::value_type, Iter1::value_type>
14// constexpr bool // constexpr after C++17
15// includes(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2);
16
17#include <algorithm>
18#include <cassert>
19
20#include "test_macros.h"
21#include "test_iterators.h"
22
23template <class Iter1, class Iter2>
24TEST_CONSTEXPR_CXX20
25void test()
26{
27 int ia[] = {1, 2, 2, 3, 3, 3, 4, 4, 4, 4};
28 const unsigned sa = sizeof(ia)/sizeof(ia[0]);
29 int ib[] = {2, 4};
30 const unsigned sb = sizeof(ib)/sizeof(ib[0]);
31 int ic[] = {1, 2};
32 const unsigned sc = sizeof(ic)/sizeof(ic[0]); ((void)sc);
33 int id[] = {3, 3, 3, 3};
34 const unsigned sd = sizeof(id)/sizeof(id[0]); ((void)sd);
35
36 assert(std::includes(Iter1(ia), Iter1(ia), Iter2(ib), Iter2(ib)));
37 assert(!std::includes(Iter1(ia), Iter1(ia), Iter2(ib), Iter2(ib+1)));
38 assert(std::includes(Iter1(ia), Iter1(ia+1), Iter2(ib), Iter2(ib)));
39 assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+sa)));
40
41 assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(ib), Iter2(ib+sb)));
42 assert(!std::includes(Iter1(ib), Iter1(ib+sb), Iter2(ia), Iter2(ia+sa)));
43
44 assert(std::includes(Iter1(ia), Iter1(ia+2), Iter2(ic), Iter2(ic+2)));
45 assert(!std::includes(Iter1(ia), Iter1(ia+2), Iter2(ib), Iter2(ib+2)));
46
47 assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+1)));
48 assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+2)));
49 assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+3)));
50 assert(!std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+4)));
51}
52
53TEST_CONSTEXPR_CXX20
54bool do_tests()
55{
56 test<cpp17_input_iterator<const int*>, cpp17_input_iterator<const int*> >();
57 test<cpp17_input_iterator<const int*>, forward_iterator<const int*> >();
58 test<cpp17_input_iterator<const int*>, bidirectional_iterator<const int*> >();
59 test<cpp17_input_iterator<const int*>, random_access_iterator<const int*> >();
60 test<cpp17_input_iterator<const int*>, const int*>();
61
62 test<forward_iterator<const int*>, cpp17_input_iterator<const int*> >();
63 test<forward_iterator<const int*>, forward_iterator<const int*> >();
64 test<forward_iterator<const int*>, bidirectional_iterator<const int*> >();
65 test<forward_iterator<const int*>, random_access_iterator<const int*> >();
66 test<forward_iterator<const int*>, const int*>();
67
68 test<bidirectional_iterator<const int*>, cpp17_input_iterator<const int*> >();
69 test<bidirectional_iterator<const int*>, forward_iterator<const int*> >();
70 test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*> >();
71 test<bidirectional_iterator<const int*>, random_access_iterator<const int*> >();
72 test<bidirectional_iterator<const int*>, const int*>();
73
74 test<random_access_iterator<const int*>, cpp17_input_iterator<const int*> >();
75 test<random_access_iterator<const int*>, forward_iterator<const int*> >();
76 test<random_access_iterator<const int*>, bidirectional_iterator<const int*> >();
77 test<random_access_iterator<const int*>, random_access_iterator<const int*> >();
78 test<random_access_iterator<const int*>, const int*>();
79
80 test<const int*, cpp17_input_iterator<const int*> >();
81 test<const int*, forward_iterator<const int*> >();
82 test<const int*, bidirectional_iterator<const int*> >();
83 test<const int*, random_access_iterator<const int*> >();
84 test<const int*, const int*>();
85
86 return true;
87}
88
89int main(int, char**)
90{
91 do_tests();
92#if TEST_STD_VER > 17
93 static_assert(do_tests());
94#endif
95 return 0;
96}
97

source code of libcxx/test/std/algorithms/alg.sorting/alg.set.operations/includes/includes.pass.cpp