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 | // UNSUPPORTED: c++03 && !stdlib=libc++ |
10 | |
11 | // <utility> |
12 | |
13 | // template <class T> |
14 | // typename conditional |
15 | // < |
16 | // !is_nothrow_move_constructible<T>::value && is_copy_constructible<T>::value, |
17 | // const T&, |
18 | // T&& |
19 | // >::type |
20 | // move_if_noexcept(T& x); |
21 | |
22 | #include <type_traits> |
23 | #include <utility> |
24 | |
25 | #include "test_macros.h" |
26 | |
27 | class A |
28 | { |
29 | A(const A&); |
30 | A& operator=(const A&); |
31 | public: |
32 | |
33 | A() {} |
34 | A(A&&) {} |
35 | }; |
36 | |
37 | struct legacy |
38 | { |
39 | legacy() {} |
40 | legacy(const legacy&); |
41 | }; |
42 | |
43 | int main(int, char**) |
44 | { |
45 | int i = 0; |
46 | const int ci = 0; |
47 | |
48 | legacy l; |
49 | A a; |
50 | const A ca; |
51 | |
52 | static_assert((std::is_same<decltype(std::move_if_noexcept(x&: i)), int&&>::value), "" ); |
53 | static_assert((std::is_same<decltype(std::move_if_noexcept(x: ci)), const int&&>::value), "" ); |
54 | static_assert((std::is_same<decltype(std::move_if_noexcept(x&: a)), A&&>::value), "" ); |
55 | static_assert((std::is_same<decltype(std::move_if_noexcept(x: ca)), const A&&>::value), "" ); |
56 | static_assert((std::is_same<decltype(std::move_if_noexcept(x&: l)), const legacy&>::value), "" ); |
57 | |
58 | #if TEST_STD_VER > 11 |
59 | constexpr int i1 = 23; |
60 | constexpr int i2 = std::move_if_noexcept(i1); |
61 | static_assert(i2 == 23, "" ); |
62 | #endif |
63 | |
64 | |
65 | return 0; |
66 | } |
67 | |