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, CopyConstructible Compare>
13//   requires Predicate<Compare, Iter1::value_type, Iter2::value_type>
14//         && Predicate<Compare, Iter2::value_type, Iter1::value_type>
15//   bool
16//   lexicographical_compare(Iter1 first1, Iter1 last1,
17//                           Iter2 first2, Iter2 last2, Compare comp);
18
19#include <algorithm>
20#include <functional>
21#include <cassert>
22
23#include "test_iterators.h"
24
25template <class Iter1, class Iter2>
26void
27test()
28{
29    int ia[] = {1, 2, 3, 4};
30    const unsigned sa = sizeof(ia)/sizeof(ia[0]);
31    int ib[] = {1, 2, 3};
32    typedef std::greater<int> C;
33    C c;
34    assert(!std::lexicographical_compare(ia, ia+sa, ib, ib+2, c));
35    assert(std::lexicographical_compare(ib, ib+2, ia, ia+sa, c));
36    assert(!std::lexicographical_compare(ia, ia+sa, ib, ib+3, c));
37    assert(std::lexicographical_compare(ib, ib+3, ia, ia+sa, c));
38    assert(!std::lexicographical_compare(ia, ia+sa, ib+1, ib+3, c));
39    assert(std::lexicographical_compare(ib+1, ib+3, ia, ia+sa, c));
40}
41
42int main()
43{
44    test<input_iterator<const int*>, input_iterator<const int*> >();
45    test<input_iterator<const int*>, forward_iterator<const int*> >();
46    test<input_iterator<const int*>, bidirectional_iterator<const int*> >();
47    test<input_iterator<const int*>, random_access_iterator<const int*> >();
48    test<input_iterator<const int*>, const int*>();
49
50    test<forward_iterator<const int*>, input_iterator<const int*> >();
51    test<forward_iterator<const int*>, forward_iterator<const int*> >();
52    test<forward_iterator<const int*>, bidirectional_iterator<const int*> >();
53    test<forward_iterator<const int*>, random_access_iterator<const int*> >();
54    test<forward_iterator<const int*>, const int*>();
55
56    test<bidirectional_iterator<const int*>, input_iterator<const int*> >();
57    test<bidirectional_iterator<const int*>, forward_iterator<const int*> >();
58    test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*> >();
59    test<bidirectional_iterator<const int*>, random_access_iterator<const int*> >();
60    test<bidirectional_iterator<const int*>, const int*>();
61
62    test<random_access_iterator<const int*>, input_iterator<const int*> >();
63    test<random_access_iterator<const int*>, forward_iterator<const int*> >();
64    test<random_access_iterator<const int*>, bidirectional_iterator<const int*> >();
65    test<random_access_iterator<const int*>, random_access_iterator<const int*> >();
66    test<random_access_iterator<const int*>, const int*>();
67
68    test<const int*, input_iterator<const int*> >();
69    test<const int*, forward_iterator<const int*> >();
70    test<const int*, bidirectional_iterator<const int*> >();
71    test<const int*, random_access_iterator<const int*> >();
72    test<const int*, const int*>();
73}
74