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, typename Compare>
12// requires Predicate<Compare, Iter1::value_type, Iter2::value_type>
13// && Predicate<Compare, Iter2::value_type, Iter1::value_type>
14// constexpr bool // constexpr after C++17
15// includes(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2, Compare comp);
16
17#include <algorithm>
18#include <functional>
19#include <cassert>
20
21#include "test_macros.h"
22#include "test_iterators.h"
23
24template <class Iter1, class Iter2>
25TEST_CONSTEXPR_CXX20
26void test()
27{
28 int ia[] = {4, 4, 4, 4, 3, 3, 3, 2, 2, 1};
29 const unsigned sa = sizeof(ia)/sizeof(ia[0]);
30 int ib[] = {4, 2};
31 const unsigned sb = sizeof(ib)/sizeof(ib[0]);
32 int ic[] = {2, 1};
33 const unsigned sc = sizeof(ic)/sizeof(ic[0]); ((void)sc);
34 int id[] = {3, 3, 3, 3};
35 const unsigned sd = sizeof(id)/sizeof(id[0]); ((void)sd);
36
37 assert(std::includes(Iter1(ia), Iter1(ia), Iter2(ib), Iter2(ib), std::greater<int>()));
38 assert(!std::includes(Iter1(ia), Iter1(ia), Iter2(ib), Iter2(ib+1), std::greater<int>()));
39 assert(std::includes(Iter1(ia), Iter1(ia+1), Iter2(ib), Iter2(ib), std::greater<int>()));
40 assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+sa), std::greater<int>()));
41
42 assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(ib), Iter2(ib+sb), std::greater<int>()));
43 assert(!std::includes(Iter1(ib), Iter1(ib+sb), Iter2(ia), Iter2(ia+sa), std::greater<int>()));
44
45 assert(std::includes(Iter1(ia+8), Iter1(ia+sa), Iter2(ic), Iter2(ic+sc), std::greater<int>()));
46 assert(!std::includes(Iter1(ia+8), Iter1(ia+sa), Iter2(ib), Iter2(ib+sb), std::greater<int>()));
47
48 assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+1), std::greater<int>()));
49 assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+2), std::greater<int>()));
50 assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+3), std::greater<int>()));
51 assert(!std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+4), std::greater<int>()));
52}
53
54TEST_CONSTEXPR_CXX20
55bool do_tests()
56{
57 test<cpp17_input_iterator<const int*>, cpp17_input_iterator<const int*> >();
58 test<cpp17_input_iterator<const int*>, forward_iterator<const int*> >();
59 test<cpp17_input_iterator<const int*>, bidirectional_iterator<const int*> >();
60 test<cpp17_input_iterator<const int*>, random_access_iterator<const int*> >();
61 test<cpp17_input_iterator<const int*>, const int*>();
62
63 test<forward_iterator<const int*>, cpp17_input_iterator<const int*> >();
64 test<forward_iterator<const int*>, forward_iterator<const int*> >();
65 test<forward_iterator<const int*>, bidirectional_iterator<const int*> >();
66 test<forward_iterator<const int*>, random_access_iterator<const int*> >();
67 test<forward_iterator<const int*>, const int*>();
68
69 test<bidirectional_iterator<const int*>, cpp17_input_iterator<const int*> >();
70 test<bidirectional_iterator<const int*>, forward_iterator<const int*> >();
71 test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*> >();
72 test<bidirectional_iterator<const int*>, random_access_iterator<const int*> >();
73 test<bidirectional_iterator<const int*>, const int*>();
74
75 test<random_access_iterator<const int*>, cpp17_input_iterator<const int*> >();
76 test<random_access_iterator<const int*>, forward_iterator<const int*> >();
77 test<random_access_iterator<const int*>, bidirectional_iterator<const int*> >();
78 test<random_access_iterator<const int*>, random_access_iterator<const int*> >();
79 test<random_access_iterator<const int*>, const int*>();
80
81 test<const int*, cpp17_input_iterator<const int*> >();
82 test<const int*, forward_iterator<const int*> >();
83 test<const int*, bidirectional_iterator<const int*> >();
84 test<const int*, random_access_iterator<const int*> >();
85 test<const int*, const int*>();
86
87 return true;
88}
89
90int main(int, char**)
91{
92 do_tests();
93#if TEST_STD_VER > 17
94 static_assert(do_tests());
95#endif
96 return 0;
97}
98

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