1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// type_traits
10
11// is_copy_assignable
12
13#include <type_traits>
14#include "test_macros.h"
15
16template <class T>
17void test_is_copy_assignable()
18{
19 static_assert(( std::is_copy_assignable<T>::value), "");
20#if TEST_STD_VER > 14
21 static_assert(( std::is_copy_assignable_v<T>), "");
22#endif
23}
24
25template <class T>
26void test_is_not_copy_assignable()
27{
28 static_assert((!std::is_copy_assignable<T>::value), "");
29#if TEST_STD_VER > 14
30 static_assert((!std::is_copy_assignable_v<T>), "");
31#endif
32}
33
34class Empty
35{
36};
37
38class NotEmpty
39{
40public:
41 virtual ~NotEmpty();
42};
43
44union Union {};
45
46struct bit_zero
47{
48 int : 0;
49};
50
51struct A
52{
53 A();
54};
55
56class B
57{
58 B& operator=(const B&);
59};
60
61struct C
62{
63 void operator=(C&); // not const
64};
65
66int main(int, char**)
67{
68 test_is_copy_assignable<int> ();
69 test_is_copy_assignable<int&> ();
70 test_is_copy_assignable<A> ();
71 test_is_copy_assignable<bit_zero> ();
72 test_is_copy_assignable<Union> ();
73 test_is_copy_assignable<NotEmpty> ();
74 test_is_copy_assignable<Empty> ();
75
76#if TEST_STD_VER >= 11
77 test_is_not_copy_assignable<const int> ();
78 test_is_not_copy_assignable<int[]> ();
79 test_is_not_copy_assignable<int[3]> ();
80 test_is_not_copy_assignable<B> ();
81#endif
82 test_is_not_copy_assignable<void> ();
83 test_is_not_copy_assignable<C> ();
84
85 return 0;
86}
87

source code of libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_copy_assignable.pass.cpp