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
|
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// type_traits
// is_assignable
#include <type_traits>
#include "test_macros.h"
struct A
{
};
struct B
{
void operator=(A);
};
template <class T, class U>
void test_is_assignable()
{
static_assert(( std::is_assignable<T, U>::value), "");
#if TEST_STD_VER > 14
static_assert( std::is_assignable_v<T, U>, "");
#endif
}
template <class T, class U>
void test_is_not_assignable()
{
static_assert((!std::is_assignable<T, U>::value), "");
#if TEST_STD_VER > 14
static_assert( !std::is_assignable_v<T, U>, "");
#endif
}
struct D;
#if TEST_STD_VER >= 11
struct C
{
template <class U>
D operator,(U&&);
};
struct E
{
C operator=(int);
};
#endif
template <typename T>
struct X { T t; };
int main(int, char**)
{
test_is_assignable<int&, int&> ();
test_is_assignable<int&, int> ();
test_is_assignable<int&, double> ();
test_is_assignable<B, A> ();
test_is_assignable<void*&, void*> ();
#if TEST_STD_VER >= 11
test_is_assignable<E, int> ();
test_is_not_assignable<int, int&> ();
test_is_not_assignable<int, int> ();
#endif
test_is_not_assignable<A, B> ();
test_is_not_assignable<void, const void> ();
test_is_not_assignable<const void, const void> ();
test_is_not_assignable<int(), int> ();
// pointer to incomplete template type
test_is_assignable<X<D>*&, X<D>*> ();
return 0;
}
|
