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 // <memory>
11 
12 // unique_ptr
13 
14 // Test unique_ptr(pointer) ctor
15 
16 #include <memory>
17 #include <cassert>
18 
19 // unique_ptr(pointer) ctor should work with derived pointers
20 
21 struct A
22 {
23     static int count;
AA24     A() {++count;}
AA25     A(const A&) {++count;}
~AA26     virtual ~A() {--count;}
27 };
28 
29 int A::count = 0;
30 
31 struct B
32     : public A
33 {
34     static int count;
BB35     B() {++count;}
BB36     B(const B&) {++count;}
~BB37     virtual ~B() {--count;}
38 };
39 
40 int B::count = 0;
41 
42 class Deleter
43 {
44     int state_;
45 
46     Deleter(Deleter&);
47     Deleter& operator=(Deleter&);
48 
49 public:
Deleter()50     Deleter() : state_(5) {}
51 
state() const52     int state() const {return state_;}
53 
operator ()(A * p)54     void operator()(A* p) {delete p;}
55 };
56 
main()57 int main()
58 {
59     {
60     B* p = new B;
61     assert(A::count == 1);
62     assert(B::count == 1);
63     std::unique_ptr<A> s(p);
64     assert(s.get() == p);
65     }
66     assert(A::count == 0);
67     assert(B::count == 0);
68     {
69     B* p = new B;
70     assert(A::count == 1);
71     assert(B::count == 1);
72     std::unique_ptr<A, Deleter> s(p);
73     assert(s.get() == p);
74     assert(s.get_deleter().state() == 5);
75     }
76     assert(A::count == 0);
77     assert(B::count == 0);
78 }
79