1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <memory>
// shared_ptr
// template<class Y, class D> shared_ptr(Y* p, D d);
#include <memory>
#include <cassert>
#include "test_macros.h"
#include "deleter_types.h"
struct A
{
static int count;
A() {++count;}
A(const A&) {++count;}
~A() {--count;}
};
int A::count = 0;
struct bad_ty { };
struct bad_deleter
{
void operator()(bad_ty) { }
};
struct no_move_deleter
{
no_move_deleter(no_move_deleter const&) = delete;
no_move_deleter(no_move_deleter &&) = delete;
void operator()(int*) { }
};
static_assert(!std::is_move_constructible<no_move_deleter>::value, "");
struct Base { };
struct Derived : Base { };
template<class T>
class MoveDeleter
{
MoveDeleter();
MoveDeleter(MoveDeleter const&);
public:
MoveDeleter(MoveDeleter&&) {};
explicit MoveDeleter(int) {}
void operator()(T *ptr) { delete ptr; }
};
// https://llvm.org/PR60258
// Invalid constructor SFINAE for std::shared_ptr's array ctors
static_assert( std::is_constructible<std::shared_ptr<int>, int*, test_deleter<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int>, int*, bad_deleter>::value, "");
static_assert( std::is_constructible<std::shared_ptr<Base>, Derived*, test_deleter<Base> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<A>, int*, test_deleter<A> >::value, "");
#if TEST_STD_VER >= 17
static_assert( std::is_constructible<std::shared_ptr<int[]>, int*, test_deleter<int>>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, int*, bad_deleter>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, int(*)[], test_deleter<int>>::value, "");
static_assert( std::is_constructible<std::shared_ptr<int[5]>, int*, test_deleter<int>>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int*, bad_deleter>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int(*)[5], test_deleter<int>>::value, "");
#endif
int main(int, char**)
{
{
A* ptr = new A;
std::shared_ptr<A> p(ptr, test_deleter<A>(3));
assert(A::count == 1);
assert(p.use_count() == 1);
assert(p.get() == ptr);
assert(test_deleter<A>::count == 1);
assert(test_deleter<A>::dealloc_count == 0);
#ifndef TEST_HAS_NO_RTTI
test_deleter<A>* d = std::get_deleter<test_deleter<A> >(p);
assert(d);
assert(d->state() == 3);
#endif
}
assert(A::count == 0);
assert(test_deleter<A>::count == 0);
assert(test_deleter<A>::dealloc_count == 1);
{
A const* ptr = new A;
std::shared_ptr<A const> p(ptr, test_deleter<A const>(3));
assert(p.get() == ptr);
}
{
// Make sure we can't construct with:
// a) a deleter that doesn't have an operator ()(int*)
// b) a deleter that doesn't have a move constructor.
static_assert(!std::is_constructible<std::shared_ptr<int>, int*, bad_deleter>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int>, int*, no_move_deleter>::value, "");
// Make sure that we can construct a shared_ptr where the element type and pointer type
// aren't "convertible" but are "compatible".
static_assert(!std::is_constructible<std::shared_ptr<Derived[4]>, Base[4], test_deleter<Derived[4]> >::value, "");
}
#if TEST_STD_VER >= 11
{
MoveDeleter<int> d(0);
std::shared_ptr<int> p0(new int, std::move(d));
std::shared_ptr<int> p1(nullptr, std::move(d));
}
#endif // TEST_STD_VER >= 11
return 0;
}
|
