blob: 4d7c8b0bc0a6bdd13ccbca176de1d3ffe667d944 (
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
|
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <cstddef>
#include <type_traits>
#include <cassert>
// typedef decltype(nullptr) nullptr_t;
struct A
{
A(std::nullptr_t) {}
};
template <class T>
void test_conversions()
{
{
T p = 0;
assert(p == nullptr);
}
{
T p = nullptr;
assert(p == nullptr);
assert(nullptr == p);
assert(!(p != nullptr));
assert(!(nullptr != p));
}
}
template <class T>
void test_comparisons()
{
T p = nullptr;
assert(p == nullptr);
assert(p <= nullptr);
assert(p >= nullptr);
assert(!(p != nullptr));
assert(!(p < nullptr));
assert(!(p > nullptr));
assert(nullptr == p);
assert(nullptr <= p);
assert(nullptr >= p);
assert(!(nullptr != p));
assert(!(nullptr < p));
assert(!(nullptr > p));
}
int main()
{
static_assert(sizeof(std::nullptr_t) == sizeof(void*),
"sizeof(std::nullptr_t) == sizeof(void*)");
{
test_conversions<std::nullptr_t>();
test_conversions<void*>();
test_conversions<A*>();
test_conversions<void(*)()>();
test_conversions<void(A::*)()>();
test_conversions<int A::*>();
}
{
test_comparisons<std::nullptr_t>();
test_comparisons<void*>();
test_comparisons<A*>();
test_comparisons<void(*)()>();
}
{
bool b = nullptr;
assert(!b);
}
}
|
