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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// type_traits
// XFAIL: apple-clang-6.0
// The Apple-6 compiler gets is_constructible<void ()> wrong.
// template <class T, class... Args>
// struct is_constructible;
#include <type_traits>
#include "test_macros.h"
struct A
{
explicit A(int);
A(int, double);
#if TEST_STD_VER >= 11
private:
#endif
A(char);
};
struct Base {};
struct Derived : public Base {};
class Abstract
{
virtual void foo() = 0;
};
class AbstractDestructor
{
virtual ~AbstractDestructor() = 0;
};
struct PrivateDtor {
PrivateDtor(int) {}
private:
~PrivateDtor() {}
};
struct S {
template <class T>
#if TEST_STD_VER >= 11
explicit
#endif
operator T () const { return T(); }
};
template <class T>
void test_is_constructible()
{
static_assert( (std::is_constructible<T>::value), "");
#if TEST_STD_VER > 14
static_assert( std::is_constructible_v<T>, "");
#endif
}
template <class T, class A0>
void test_is_constructible()
{
static_assert(( std::is_constructible<T, A0>::value), "");
#if TEST_STD_VER > 14
static_assert(( std::is_constructible_v<T, A0>), "");
#endif
}
template <class T, class A0, class A1>
void test_is_constructible()
{
static_assert(( std::is_constructible<T, A0, A1>::value), "");
#if TEST_STD_VER > 14
static_assert(( std::is_constructible_v<T, A0, A1>), "");
#endif
}
template <class T>
void test_is_not_constructible()
{
static_assert((!std::is_constructible<T>::value), "");
#if TEST_STD_VER > 14
static_assert((!std::is_constructible_v<T>), "");
#endif
}
template <class T, class A0>
void test_is_not_constructible()
{
static_assert((!std::is_constructible<T, A0>::value), "");
#if TEST_STD_VER > 14
static_assert((!std::is_constructible_v<T, A0>), "");
#endif
}
int main()
{
test_is_constructible<int> ();
test_is_constructible<int, const int> ();
test_is_constructible<A, int> ();
test_is_constructible<A, int, double> ();
test_is_constructible<int&, int&> ();
test_is_not_constructible<A> ();
#if TEST_STD_VER >= 11
test_is_not_constructible<A, char> ();
#else
test_is_constructible<A, char> ();
#endif
test_is_not_constructible<A, void> ();
test_is_not_constructible<void> ();
test_is_not_constructible<const void> (); // LWG 2738
test_is_not_constructible<volatile void> ();
test_is_not_constructible<const volatile void> ();
test_is_not_constructible<int&> ();
test_is_not_constructible<Abstract> ();
test_is_not_constructible<AbstractDestructor> ();
test_is_constructible<int, S>();
test_is_not_constructible<int&, S>();
#if TEST_STD_VER >= 11
test_is_constructible<int const&, int>();
test_is_constructible<int const&, int&&>();
test_is_not_constructible<int&, int>();
test_is_not_constructible<int&, int const&>();
test_is_not_constructible<int&, int&&>();
test_is_constructible<int&&, int>();
test_is_constructible<int&&, int&&>();
test_is_not_constructible<int&&, int&>();
test_is_not_constructible<int&&, int const&&>();
test_is_constructible<Base, Derived>();
test_is_constructible<Base&, Derived&>();
test_is_not_constructible<Derived&, Base&>();
test_is_constructible<Base const&, Derived const&>();
test_is_not_constructible<Derived const&, Base const&>();
test_is_not_constructible<Derived const&, Base>();
test_is_constructible<Base&&, Derived>();
test_is_constructible<Base&&, Derived&&>();
test_is_not_constructible<Derived&&, Base&&>();
test_is_not_constructible<Derived&&, Base>();
// test that T must also be destructible
test_is_constructible<PrivateDtor&, PrivateDtor&>();
test_is_not_constructible<PrivateDtor, int>();
test_is_not_constructible<void() const, void() const>();
test_is_not_constructible<void() const, void*>();
// TODO: Remove this workaround once Clang <= 3.7 are no longer used regularly.
// In those compiler versions the __is_constructible builtin gives the wrong
// results for abominable function types.
#if (defined(TEST_APPLE_CLANG_VER) && TEST_APPLE_CLANG_VER < 703) \
|| (defined(TEST_CLANG_VER) && TEST_CLANG_VER < 308)
#define WORKAROUND_CLANG_BUG
#endif
#if !defined(WORKAROUND_CLANG_BUG)
test_is_not_constructible<void()>();
test_is_not_constructible<void() const> ();
test_is_not_constructible<void() volatile> ();
test_is_not_constructible<void() &> ();
test_is_not_constructible<void() &&> ();
#endif
#endif
}
|
