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, class D> shared_ptr(Y* p, D d);
14
15 #include <memory>
16 #include <cassert>
17 #include "test_macros.h"
18 #include "deleter_types.h"
19
20 #include "types.h"
21
22 struct A
23 {
24 static int count;
25
AA26 A() {++count;}
AA27 A(const A&) {++count;}
~AA28 ~A() {--count;}
29 };
30
31 int A::count = 0;
32
33 // LWG 3233. Broken requirements for shared_ptr converting constructors
34 // https://cplusplus.github.io/LWG/issue3233
35 // https://llvm.org/PR60258
36 // Invalid constructor SFINAE for std::shared_ptr's array ctors
37 static_assert( std::is_constructible<std::shared_ptr<int>, int*, test_deleter<int> >::value, "");
38 static_assert(!std::is_constructible<std::shared_ptr<int>, int*, bad_deleter>::value, "");
39 static_assert( std::is_constructible<std::shared_ptr<base>, derived*, test_deleter<base> >::value, "");
40 static_assert(!std::is_constructible<std::shared_ptr<A>, int*, test_deleter<A> >::value, "");
41
42 #if TEST_STD_VER >= 17
43 static_assert( std::is_constructible<std::shared_ptr<int[]>, int*, test_deleter<int> >::value, "");
44 static_assert(!std::is_constructible<std::shared_ptr<int[]>, int*, bad_deleter>::value, "");
45 static_assert(!std::is_constructible<std::shared_ptr<int[]>, int(*)[], test_deleter<int> >::value, "");
46 static_assert( std::is_constructible<std::shared_ptr<int[5]>, int*, test_deleter<int> >::value, "");
47 static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int*, bad_deleter>::value, "");
48 static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int(*)[5], test_deleter<int> >::value, "");
49 #endif
50
f()51 int f() { return 5; }
52
53 // https://cplusplus.github.io/LWG/issue3018
54 // LWG 3018. shared_ptr of function type
55 struct function_pointer_deleter {
function_pointer_deleterfunction_pointer_deleter56 function_pointer_deleter(bool& deleter_called) : deleter_called_(deleter_called) {}
57
operator ()function_pointer_deleter58 void operator()(int (*)()) const { deleter_called_ = true; }
59
60 bool& deleter_called_;
61 };
62
test_function_type()63 void test_function_type() {
64 bool deleter_called = false;
65 {
66 std::shared_ptr<int()> p(&f, function_pointer_deleter(deleter_called));
67 assert((*p)() == 5);
68 }
69 assert(deleter_called);
70 }
71
main(int,char **)72 int main(int, char**)
73 {
74 {
75 A* ptr = new A;
76 std::shared_ptr<A> p(ptr, test_deleter<A>(3));
77 assert(A::count == 1);
78 assert(p.use_count() == 1);
79 assert(p.get() == ptr);
80 assert(test_deleter<A>::count == 1);
81 assert(test_deleter<A>::dealloc_count == 0);
82 #ifndef TEST_HAS_NO_RTTI
83 test_deleter<A>* d = std::get_deleter<test_deleter<A> >(p);
84 assert(d);
85 assert(d->state() == 3);
86 #endif
87 }
88 assert(A::count == 0);
89 assert(test_deleter<A>::count == 0);
90 assert(test_deleter<A>::dealloc_count == 1);
91
92 {
93 A const* ptr = new A;
94 std::shared_ptr<A const> p(ptr, test_deleter<A const>(3));
95 assert(p.get() == ptr);
96 }
97
98 {
99 // Make sure we can't construct with:
100 // a) a deleter that doesn't have an operator ()(int*)
101 // b) a deleter that doesn't have a move constructor.
102 static_assert(!std::is_constructible<std::shared_ptr<int>, int*, bad_deleter>::value, "");
103 static_assert(!std::is_constructible<std::shared_ptr<int>, int*, no_move_deleter>::value, "");
104
105 // Make sure that we can construct a shared_ptr where the element type and pointer type
106 // aren't "convertible" but are "compatible".
107 static_assert(!std::is_constructible<std::shared_ptr<derived[4]>, base[4], test_deleter<derived[4]> >::value, "");
108 }
109
110 #if TEST_STD_VER >= 11
111 {
112 move_deleter<int> d(0);
113 std::shared_ptr<int> p0(new int, std::move(d));
114 std::shared_ptr<int> p1(nullptr, std::move(d));
115 }
116 #endif // TEST_STD_VER >= 11
117
118 #if TEST_STD_VER >= 14
119 {
120 // LWG 4110
121 auto deleter = [](auto pointer) { delete pointer; };
122 std::shared_ptr<int> p(new int, deleter);
123 }
124
125 {
126 std::shared_ptr<int> p(NULL, [](auto){});
127 }
128 #endif
129
130 #if TEST_STD_VER >= 17
131 {
132 // See https://github.com/llvm/llvm-project/pull/93071#issuecomment-2166047398
133 std::shared_ptr<char[]> a(new char[10], std::default_delete<char[]>());
134 }
135 #endif
136
137 test_function_type();
138 return 0;
139 }
140