blob: 6ad5630a61bde624fbb23d8a17ef6164c783765e (
plain)
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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
// Copyright (C) 2017-2023 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-options "-std=gnu++2a" }
// { dg-do run { target c++2a } }
#include <memory>
#include <testsuite_hooks.h>
class P1
{
public:
using element_type = int;
explicit P1(int* p)
: p_(p) { }
int* operator->() const noexcept
{ return p_; }
private:
int* p_;
};
class P2
{
public:
using element_type = int;
explicit P2(int* p)
: p_(p) { }
P1 operator->() const noexcept
{ return p_; }
private:
P1 p_;
};
class P3
{
public:
explicit P3(int* p)
: p_(p) { }
int* get() const noexcept
{ return p_; }
private:
int* p_;
};
namespace std
{
template<>
struct pointer_traits<::P3>
{
static int* to_address(const ::P3& p) noexcept
{ return p.get(); }
};
}
class P4
{
public:
explicit P4(int* p)
: p_(p) { }
int* operator->() const noexcept
{ return nullptr; }
int* get() const noexcept
{ return p_; }
private:
int* p_;
};
namespace std
{
template<>
struct pointer_traits<::P4>
{
static int* to_address(const ::P4& p) noexcept
{ return p.get(); }
};
}
void test01()
{
int i = 0;
int* p = &i;
VERIFY( std::to_address(p) == &i );
}
void test02()
{
int i = 0;
P1 p(&i);
VERIFY( std::to_address(p) == &i );
}
void test03()
{
int i = 0;
P2 p(&i);
VERIFY( std::to_address(p) == &i );
}
void test04()
{
int i = 0;
P3 p(&i);
VERIFY( std::to_address(p) == &i );
}
void test05()
{
int i = 0;
P4 p(&i);
VERIFY( std::to_address(p) == &i );
}
int main()
{
test01();
test02();
test03();
test04();
test05();
return 0;
}
|
