shared_ptr.pass.cpp revision bc8d3f97eb5c958007f2713238472e0c1c8fe02c 
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// shared_ptr
13
14// shared_ptr(const shared_ptr& r);
15
16#include <memory>
17#include <cassert>
18
19struct A
20{
21    static int count;
22
23    A() {++count;}
24    A(const A&) {++count;}
25    ~A() {--count;}
26};
27
28int A::count = 0;
29
30int main()
31{
32    {
33        std::shared_ptr<A> pA(new A);
34        assert(pA.use_count() == 1);
35        assert(A::count == 1);
36        {
37            std::shared_ptr<A> pA2(pA);
38            assert(A::count == 1);
39            assert(pA.use_count() == 2);
40            assert(pA2.use_count() == 2);
41            assert(pA2.get() == pA.get());
42        }
43        assert(pA.use_count() == 1);
44        assert(A::count == 1);
45    }
46    assert(A::count == 0);
47    {
48        std::shared_ptr<A> pA;
49        assert(pA.use_count() == 0);
50        assert(A::count == 0);
51        {
52            std::shared_ptr<A> pA2(pA);
53            assert(A::count == 0);
54            assert(pA.use_count() == 0);
55            assert(pA2.use_count() == 0);
56            assert(pA2.get() == pA.get());
57        }
58        assert(pA.use_count() == 0);
59        assert(A::count == 0);
60    }
61    assert(A::count == 0);
62}
63