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_nothrow_assignable |
12 | |
13 | #include <type_traits> |
14 | #include "test_macros.h" |
15 | |
16 | template <class T, class U> |
17 | void test_is_nothrow_assignable() |
18 | { |
19 | static_assert(( std::is_nothrow_assignable<T, U>::value), "" ); |
20 | #if TEST_STD_VER > 14 |
21 | static_assert(( std::is_nothrow_assignable_v<T, U>), "" ); |
22 | #endif |
23 | } |
24 | |
25 | template <class T, class U> |
26 | void test_is_not_nothrow_assignable() |
27 | { |
28 | static_assert((!std::is_nothrow_assignable<T, U>::value), "" ); |
29 | #if TEST_STD_VER > 14 |
30 | static_assert((!std::is_nothrow_assignable_v<T, U>), "" ); |
31 | #endif |
32 | } |
33 | |
34 | struct A |
35 | { |
36 | }; |
37 | |
38 | struct B |
39 | { |
40 | void operator=(A); |
41 | }; |
42 | |
43 | struct C |
44 | { |
45 | void operator=(C&); // not const |
46 | }; |
47 | |
48 | int main(int, char**) |
49 | { |
50 | test_is_nothrow_assignable<int&, int&> (); |
51 | test_is_nothrow_assignable<int&, int> (); |
52 | #if TEST_STD_VER >= 11 |
53 | test_is_nothrow_assignable<int&, double> (); |
54 | #endif |
55 | |
56 | test_is_not_nothrow_assignable<int, int&> (); |
57 | test_is_not_nothrow_assignable<int, int> (); |
58 | test_is_not_nothrow_assignable<B, A> (); |
59 | test_is_not_nothrow_assignable<A, B> (); |
60 | test_is_not_nothrow_assignable<C, C&> (); |
61 | |
62 | return 0; |
63 | } |
64 | |