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 // reference operator*() const;
15 
16 #include <iterator>
17 #include <cassert>
18 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
19 #include <memory>
20 #endif
21 
22 class A
23 {
24     int data_;
25 public:
26     A() : data_(1) {}
27     ~A() {data_ = -1;}
28 
29     friend bool operator==(const A& x, const A& y)
30         {return x.data_ == y.data_;}
31 };
32 
33 template <class It>
34 void
35 test(It i, typename std::iterator_traits<It>::value_type x)
36 {
37     std::move_iterator<It> r(i);
38     assert(*r == x);
39     typename std::iterator_traits<It>::value_type x2 = *r;
40     assert(x2 == x);
41 }
42 
43 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
44 
45 struct do_nothing
46 {
47     void operator()(void*) const {}
48 };
49 
50 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
51 
52 int main()
53 {
54     A a;
55     test(&a, A());
56 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
57     int i;
58     std::unique_ptr<int, do_nothing> p(&i);
59     test(&p, std::unique_ptr<int, do_nothing>(&i));
60 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
61 }
62