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<BidirectionalIterator InIter, BidirectionalIterator OutIter>
13 // requires OutputIterator<OutIter, InIter::reference>
14 // OutIter
15 // copy_backward(InIter first, InIter last, OutIter result);
16
17 #include <algorithm>
18 #include <cassert>
19
20 #include "test_iterators.h"
21
22 template <class InIter, class OutIter>
23 void
test()24 test()
25 {
26 const unsigned N = 1000;
27 int ia[N];
28 for (unsigned i = 0; i < N; ++i)
29 ia[i] = i;
30 int ib[N] = {0};
31
32 OutIter r = std::copy_backward(InIter(ia), InIter(ia+N), OutIter(ib+N));
33 assert(base(r) == ib);
34 for (unsigned i = 0; i < N; ++i)
35 assert(ia[i] == ib[i]);
36 }
37
main()38 int main()
39 {
40 test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
41 test<bidirectional_iterator<const int*>, random_access_iterator<int*> >();
42 test<bidirectional_iterator<const int*>, int*>();
43
44 test<random_access_iterator<const int*>, bidirectional_iterator<int*> >();
45 test<random_access_iterator<const int*>, random_access_iterator<int*> >();
46 test<random_access_iterator<const int*>, int*>();
47
48 test<const int*, bidirectional_iterator<int*> >();
49 test<const int*, random_access_iterator<int*> >();
50 test<const int*, int*>();
51 }
52