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 // <iterator>
11
12 // move_iterator
13
14 // requires RandomAccessIterator<Iter>
15 // unspecified operator[](difference_type n) const;
16
17 #include <iterator>
18 #include <cassert>
19 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
20 #include <memory>
21 #endif
22
23 #include "test_iterators.h"
24
25 template <class It>
26 void
test(It i,typename std::iterator_traits<It>::difference_type n,typename std::iterator_traits<It>::value_type x)27 test(It i, typename std::iterator_traits<It>::difference_type n,
28 typename std::iterator_traits<It>::value_type x)
29 {
30 typedef typename std::iterator_traits<It>::value_type value_type;
31 const std::move_iterator<It> r(i);
32 value_type rr = r[n];
33 assert(rr == x);
34 }
35
36 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
37
38 struct do_nothing
39 {
operator ()do_nothing40 void operator()(void*) const {}
41 };
42
43 #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
44
main()45 int main()
46 {
47 char s[] = "1234567890";
48 test(random_access_iterator<char*>(s+5), 4, '0');
49 test(s+5, 4, '0');
50 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
51 int i[5];
52 typedef std::unique_ptr<int, do_nothing> Ptr;
53 Ptr p[5];
54 for (unsigned j = 0; j < 5; ++j)
55 p[j].reset(i+j);
56 test(p, 3, Ptr(i+3));
57 #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
58 }
59