1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <algorithm>
11
12// template<InputIterator Iter1, InputIterator Iter2, typename Compare>
13//   requires Predicate<Compare, Iter1::value_type, Iter2::value_type>
14//         && Predicate<Compare, Iter2::value_type, Iter1::value_type>
15//   constexpr bool             // constexpr after C++17
16//   includes(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2, Compare comp);
17
18#include <algorithm>
19#include <functional>
20#include <cassert>
21
22#include "test_macros.h"
23#include "test_iterators.h"
24
25#if TEST_STD_VER > 17
26TEST_CONSTEXPR bool test_constexpr() {
27    int ia[] = {1, 2, 2, 3, 3, 3, 4, 4, 4, 4};
28    int ib[] = {2, 4};
29    int ic[] = {3, 3, 3, 3};
30
31    auto comp = [](int a, int b) {return a < b; };
32    return  std::includes(std::begin(ia), std::end(ia), std::begin(ib), std::end(ib), comp)
33        && !std::includes(std::begin(ia), std::end(ia), std::begin(ic), std::end(ic), comp)
34           ;
35    }
36#endif
37
38
39template <class Iter1, class Iter2>
40void
41test()
42{
43    int ia[] = {1, 2, 2, 3, 3, 3, 4, 4, 4, 4};
44    const unsigned sa = sizeof(ia)/sizeof(ia[0]);
45    int ib[] = {2, 4};
46    const unsigned sb = sizeof(ib)/sizeof(ib[0]);
47    int ic[] = {1, 2};
48    const unsigned sc = sizeof(ic)/sizeof(ic[0]); ((void)sc);
49    int id[] = {3, 3, 3, 3};
50    const unsigned sd = sizeof(id)/sizeof(id[0]); ((void)sd);
51
52    assert(std::includes(Iter1(ia), Iter1(ia), Iter2(ib), Iter2(ib), std::less<int>()));
53    assert(!std::includes(Iter1(ia), Iter1(ia), Iter2(ib), Iter2(ib+1), std::less<int>()));
54    assert(std::includes(Iter1(ia), Iter1(ia+1), Iter2(ib), Iter2(ib), std::less<int>()));
55    assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+sa), std::less<int>()));
56
57    assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(ib), Iter2(ib+sb), std::less<int>()));
58    assert(!std::includes(Iter1(ib), Iter1(ib+sb), Iter2(ia), Iter2(ia+sa), std::less<int>()));
59
60    assert(std::includes(Iter1(ia), Iter1(ia+2), Iter2(ic), Iter2(ic+2), std::less<int>()));
61    assert(!std::includes(Iter1(ia), Iter1(ia+2), Iter2(ib), Iter2(ib+2), std::less<int>()));
62
63    assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+1), std::less<int>()));
64    assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+2), std::less<int>()));
65    assert(std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+3), std::less<int>()));
66    assert(!std::includes(Iter1(ia), Iter1(ia+sa), Iter2(id), Iter2(id+4), std::less<int>()));
67}
68
69int main()
70{
71    test<input_iterator<const int*>, input_iterator<const int*> >();
72    test<input_iterator<const int*>, forward_iterator<const int*> >();
73    test<input_iterator<const int*>, bidirectional_iterator<const int*> >();
74    test<input_iterator<const int*>, random_access_iterator<const int*> >();
75    test<input_iterator<const int*>, const int*>();
76
77    test<forward_iterator<const int*>, input_iterator<const int*> >();
78    test<forward_iterator<const int*>, forward_iterator<const int*> >();
79    test<forward_iterator<const int*>, bidirectional_iterator<const int*> >();
80    test<forward_iterator<const int*>, random_access_iterator<const int*> >();
81    test<forward_iterator<const int*>, const int*>();
82
83    test<bidirectional_iterator<const int*>, input_iterator<const int*> >();
84    test<bidirectional_iterator<const int*>, forward_iterator<const int*> >();
85    test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*> >();
86    test<bidirectional_iterator<const int*>, random_access_iterator<const int*> >();
87    test<bidirectional_iterator<const int*>, const int*>();
88
89    test<random_access_iterator<const int*>, input_iterator<const int*> >();
90    test<random_access_iterator<const int*>, forward_iterator<const int*> >();
91    test<random_access_iterator<const int*>, bidirectional_iterator<const int*> >();
92    test<random_access_iterator<const int*>, random_access_iterator<const int*> >();
93    test<random_access_iterator<const int*>, const int*>();
94
95    test<const int*, input_iterator<const int*> >();
96    test<const int*, forward_iterator<const int*> >();
97    test<const int*, bidirectional_iterator<const int*> >();
98    test<const int*, random_access_iterator<const int*> >();
99    test<const int*, const int*>();
100
101#if TEST_STD_VER > 17
102   static_assert(test_constexpr());
103#endif
104}
105