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// <memory>
10
11// shared_ptr
12
13// template<class Y> void reset(Y* p);
14
15#include <memory>
16#include <cassert>
17
18#include "reset_helper.h"
19#include "test_macros.h"
20
21struct B
22{
23 static int count;
24
25 B() {++count;}
26 B(const B&) {++count;}
27 virtual ~B() {--count;}
28};
29
30int B::count = 0;
31
32struct A
33 : public B
34{
35 static int count;
36
37 A() {++count;}
38 A(const A& other) : B(other) {++count;}
39 ~A() {--count;}
40};
41
42int A::count = 0;
43
44struct Derived : A {};
45
46static_assert( HasReset<std::shared_ptr<int>, int*>::value, "");
47static_assert( HasReset<std::shared_ptr<A>, Derived*>::value, "");
48static_assert(!HasReset<std::shared_ptr<A>, int*>::value, "");
49
50#if TEST_STD_VER >= 17
51static_assert( HasReset<std::shared_ptr<int[]>, int*>::value, "");
52static_assert(!HasReset<std::shared_ptr<int[]>, int(*)[]>::value, "");
53static_assert( HasReset<std::shared_ptr<int[5]>, int*>::value, "");
54static_assert(!HasReset<std::shared_ptr<int[5]>, int(*)[5]>::value, "");
55#endif
56
57int main(int, char**)
58{
59 {
60 std::shared_ptr<B> p(new B);
61 A* ptr = new A;
62 p.reset(p: ptr);
63 assert(A::count == 1);
64 assert(B::count == 1);
65 assert(p.use_count() == 1);
66 assert(p.get() == ptr);
67 }
68 assert(A::count == 0);
69 {
70 std::shared_ptr<B> p;
71 A* ptr = new A;
72 p.reset(p: ptr);
73 assert(A::count == 1);
74 assert(B::count == 1);
75 assert(p.use_count() == 1);
76 assert(p.get() == ptr);
77 }
78 assert(A::count == 0);
79
80#if TEST_STD_VER > 14
81 {
82 std::shared_ptr<const A[]> p;
83 A* ptr = new A[8];
84 p.reset(ptr);
85 assert(A::count == 8);
86 assert(p.use_count() == 1);
87 assert(p.get() == ptr);
88 }
89 assert(A::count == 0);
90#endif
91
92 return 0;
93}
94

source code of libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.mod/reset_pointer.pass.cpp