move_convert11.fail.cpp revision f5256e16dfc425c1d466f6308d4026d529ce9e0b 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <memory>
11
12// unique_ptr
13
14// Test unique_ptr converting move ctor
15
16#include <memory>
17#include <cassert>
18
19// test converting move ctor.  Should only require a MoveConstructible deleter, or if
20//    deleter is a reference, not even that.
21// Implicit version
22
23struct A
24{
25    static int count;
26    A() {++count;}
27    A(const A&) {++count;}
28    virtual ~A() {--count;}
29};
30
31int A::count = 0;
32
33struct B
34    : public A
35{
36    static int count;
37    B() {++count;}
38    B(const B&) {++count;}
39    virtual ~B() {--count;}
40};
41
42int B::count = 0;
43
44template <class T>
45class Deleter
46{
47    int state_;
48
49#ifdef _LIBCPP_MOVE
50    Deleter(const Deleter&);
51    Deleter& operator=(const Deleter&);
52#else
53    Deleter(Deleter&);
54    Deleter& operator=(Deleter&);
55#endif
56
57public:
58#ifdef _LIBCPP_MOVE
59    Deleter(Deleter&& r) : state_(r.state_) {r.state_ = 0;}
60    Deleter& operator=(Deleter&& r)
61    {
62        state_ = r.state_;
63        r.state_ = 0;
64        return *this;
65    }
66#else
67    operator std::__rv<Deleter>() {return std::__rv<Deleter>(*this);}
68    Deleter(std::__rv<Deleter> r) : state_(r->state_) {r->state_ = 0;}
69    Deleter& operator=(std::__rv<Deleter> r)
70    {
71        state_ = r->state_;
72        r->state_ = 0;
73        return *this;
74    }
75#endif
76
77    Deleter() : state_(5) {}
78
79#ifdef _LIBCPP_MOVE
80    template <class U>
81        Deleter(Deleter<U>&& d,
82            typename std::enable_if<!std::is_same<U, T>::value>::type* = 0)
83            : state_(d.state()) {d.set_state(0);}
84
85private:
86    template <class U>
87        Deleter(const Deleter<U>& d,
88            typename std::enable_if<!std::is_same<U, T>::value>::type* = 0);
89#else
90    template <class U>
91        Deleter(Deleter<U> d,
92            typename std::enable_if<!std::is_same<U, T>::value>::type* = 0)
93            : state_(d.state()) {}
94#endif
95public:
96    int state() const {return state_;}
97    void set_state(int i) {state_ = i;}
98
99    void operator()(T* p) {delete p;}
100};
101
102int main()
103{
104    {
105    const std::unique_ptr<B, Deleter<B> > s(new B);
106    A* p = s.get();
107    std::unique_ptr<A, Deleter<A> > s2 = s;
108    assert(s2.get() == p);
109    assert(s.get() == 0);
110    assert(A::count == 1);
111    assert(B::count == 1);
112    assert(s2.get_deleter().state() == 5);
113    assert(s.get_deleter().state() == 0);
114    }
115    assert(A::count == 0);
116    assert(B::count == 0);
117}
118