| 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 | |