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,
13//          Predicate<auto, Iter1::value_type, Iter2::value_type> Pred>
14//   requires CopyConstructible<Pred>
15//   pair<Iter1, Iter2>
16//   mismatch(Iter1 first1, Iter1 last1, Iter2 first2, Pred pred);
17
18#include <algorithm>
19#include <functional>
20#include <cassert>
21
22#include "test_iterators.h"
23
24#if _LIBCPP_STD_VER > 11
25#define HAS_FOUR_ITERATOR_VERSION
26#endif
27
28
29int main()
30{
31    int ia[] = {0, 1, 2, 2, 0, 1, 2, 3};
32    const unsigned sa = sizeof(ia)/sizeof(ia[0]);
33    int ib[] = {0, 1, 2, 3, 0, 1, 2, 3};
34    assert(std::mismatch(input_iterator<const int*>(ia),
35                         input_iterator<const int*>(ia + sa),
36                         input_iterator<const int*>(ib),
37                         std::equal_to<int>()) ==
38                         (std::pair<input_iterator<const int*>,
39                                    input_iterator<const int*> >(
40                            input_iterator<const int*>(ia+3),
41                            input_iterator<const int*>(ib+3))));
42#ifdef HAS_FOUR_ITERATOR_VERSION
43    assert(std::mismatch(input_iterator<const int*>(ia),
44                         input_iterator<const int*>(ia + sa),
45                         input_iterator<const int*>(ib),
46                         input_iterator<const int*>(ib + sa),
47                         std::equal_to<int>()) ==
48                         (std::pair<input_iterator<const int*>,
49                                    input_iterator<const int*> >(
50                            input_iterator<const int*>(ia+3),
51                            input_iterator<const int*>(ib+3))));
52#endif
53
54    assert(std::mismatch(ia, ia + sa, ib, std::equal_to<int>()) ==
55           (std::pair<int*,int*>(ia+3,ib+3)));
56#ifdef HAS_FOUR_ITERATOR_VERSION
57    assert(std::mismatch(ia, ia + sa, ib, ib + sa, std::equal_to<int>()) ==
58           (std::pair<int*,int*>(ia+3,ib+3)));
59    assert(std::mismatch(ia, ia + sa, ib, ib + 2, std::equal_to<int>()) ==
60           (std::pair<int*,int*>(ia+2,ib+2)));
61#endif
62}
63