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#include <utility>
18
19#include "reset_helper.h"
20#include "test_macros.h"
21
22struct B
23{
24 static int count;
25
26 B() {++count;}
27 B(const B&) {++count;}
28 virtual ~B() {--count;}
29};
30
31int B::count = 0;
32
33struct A
34 : public B
35{
36 static int count;
37
38 A() {++count;}
39 A(const A& other) : B(other) {++count;}
40 ~A() {--count;}
41};
42
43int A::count = 0;
44
45struct Derived : A {};
46
47static_assert( HasReset<std::shared_ptr<int>, int*>::value, "");
48static_assert( HasReset<std::shared_ptr<A>, Derived*>::value, "");
49static_assert(!HasReset<std::shared_ptr<A>, int*>::value, "");
50
51#if TEST_STD_VER >= 17
52static_assert( HasReset<std::shared_ptr<int[]>, int*>::value, "");
53static_assert(!HasReset<std::shared_ptr<int[]>, int(*)[]>::value, "");
54static_assert( HasReset<std::shared_ptr<int[5]>, int*>::value, "");
55static_assert(!HasReset<std::shared_ptr<int[5]>, int(*)[5]>::value, "");
56#endif
57
58int main(int, char**)
59{
60 {
61 std::shared_ptr<B> p(new B);
62 A* ptr = new A;
63 p.reset(p: ptr);
64 assert(A::count == 1);
65 assert(B::count == 1);
66 assert(p.use_count() == 1);
67 assert(p.get() == ptr);
68 }
69 assert(A::count == 0);
70 {
71 std::shared_ptr<B> p;
72 A* ptr = new A;
73 p.reset(p: ptr);
74 assert(A::count == 1);
75 assert(B::count == 1);
76 assert(p.use_count() == 1);
77 assert(p.get() == ptr);
78 }
79 assert(A::count == 0);
80
81#if TEST_STD_VER > 14
82 {
83 std::shared_ptr<const A[]> p;
84 A* ptr = new A[8];
85 p.reset(ptr);
86 assert(A::count == 8);
87 assert(p.use_count() == 1);
88 assert(p.get() == ptr);
89 }
90 assert(A::count == 0);
91#endif
92
93 return 0;
94}
95

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