1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// <iterator>
10
11// move_iterator
12
13// reference operator*() const;
14//
15// constexpr in C++17
16
17#include <iterator>
18#include <cassert>
19#include <memory>
20
21#include "test_iterators.h"
22#include "test_macros.h"
23
24class A
25{
26 int data_;
27public:
28 A() : data_(1) {}
29 A(const A&) = default;
30 A& operator=(const A&) = default;
31 ~A() {data_ = -1;}
32
33 friend bool operator==(const A& x, const A& y)
34 {return x.data_ == y.data_;}
35};
36
37template <class It>
38void
39test(It i, typename std::iterator_traits<It>::value_type x)
40{
41 std::move_iterator<It> r(i);
42 assert(*r == x);
43 typename std::iterator_traits<It>::value_type x2 = *r;
44 assert(x2 == x);
45}
46
47struct do_nothing
48{
49 void operator()(void*) const {}
50};
51
52
53int main(int, char**) {
54 {
55 A a;
56 test(i: &a, x: A());
57 }
58#if TEST_STD_VER >= 11
59 {
60 int i;
61 std::unique_ptr<int, do_nothing> p(&i);
62 test(&p, std::unique_ptr<int, do_nothing>(&i));
63 }
64#endif
65#if TEST_STD_VER > 14
66 {
67 constexpr const char *p = "123456789";
68 typedef std::move_iterator<const char *> MI;
69 constexpr MI it1 = std::make_move_iterator(p);
70 constexpr MI it2 = std::make_move_iterator(p+1);
71 static_assert(*it1 == p[0], "");
72 static_assert(*it2 == p[1], "");
73 }
74#endif
75
76#if TEST_STD_VER > 17
77 // Ensure the `iter_move` customization point is being used.
78 {
79 int a[] = {0, 1, 2};
80
81 int iter_moves = 0;
82 adl::Iterator i = adl::Iterator::TrackMoves(a, iter_moves);
83 std::move_iterator<adl::Iterator> mi(i);
84
85 auto x = *mi;
86 assert(x == 0);
87 assert(iter_moves == 1);
88 }
89#endif
90
91 return 0;
92}
93

source code of libcxx/test/std/iterators/predef.iterators/move.iterators/move.iter.ops/move.iter.op.star/op_star.pass.cpp