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// libc++ cannot safely provide the auto_ptr constructor without rvalue
11// references.
12// REQUIRES: c++11 || c++14
13
14// <memory>
15
16// unique_ptr
17
18// template <class U> unique_ptr(auto_ptr<U>&&) noexcept
19
20#include <memory>
21#include <utility>
22#include <cassert>
23
24#include "test_macros.h"
25
26struct A
27{
28    static int count;
29    A() {++count;}
30    A(const A&) {++count;}
31    virtual ~A() {--count;}
32};
33
34int A::count = 0;
35
36struct B
37    : public A
38{
39    static int count;
40    B() {++count;}
41    B(const B&) {++count;}
42    virtual ~B() {--count;}
43};
44
45int B::count = 0;
46
47int main()
48{
49    {
50    B* p = new B;
51    std::auto_ptr<B> ap(p);
52    std::unique_ptr<A> up(std::move(ap));
53    assert(up.get() == p);
54    assert(ap.get() == 0);
55    assert(A::count == 1);
56    assert(B::count == 1);
57    }
58    assert(A::count == 0);
59    assert(B::count == 0);
60    {
61    B* p = new B;
62    std::auto_ptr<B> ap(p);
63    std::unique_ptr<A> up;
64    up = std::move(ap);
65    assert(up.get() == p);
66    assert(ap.get() == 0);
67    assert(A::count == 1);
68    assert(B::count == 1);
69    }
70    assert(A::count == 0);
71    assert(B::count == 0);
72#if TEST_STD_VER >= 11
73    {
74        static_assert(std::is_nothrow_constructible<
75            std::unique_ptr<A>,
76            std::auto_ptr<B>&&
77        >::value, "");
78    }
79#endif
80}
81