| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <utility> |
| |
| // template <class T> |
| // typename conditional |
| // < |
| // !is_nothrow_move_constructible<T>::value && is_copy_constructible<T>::value, |
| // const T&, |
| // T&& |
| // >::type |
| // move_if_noexcept(T& x); |
| |
| #include <utility> |
| |
| #include "test_macros.h" |
| |
| class A |
| { |
| A(const A&); |
| A& operator=(const A&); |
| public: |
| |
| A() {} |
| A(A&&) {} |
| }; |
| |
| struct legacy |
| { |
| legacy() {} |
| legacy(const legacy&); |
| }; |
| |
| int main(int, char**) |
| { |
| int i = 0; |
| const int ci = 0; |
| |
| legacy l; |
| A a; |
| const A ca; |
| |
| #if TEST_STD_VER >= 11 |
| static_assert((std::is_same<decltype(std::move_if_noexcept(i)), int&&>::value), ""); |
| static_assert((std::is_same<decltype(std::move_if_noexcept(ci)), const int&&>::value), ""); |
| static_assert((std::is_same<decltype(std::move_if_noexcept(a)), A&&>::value), ""); |
| static_assert((std::is_same<decltype(std::move_if_noexcept(ca)), const A&&>::value), ""); |
| static_assert((std::is_same<decltype(std::move_if_noexcept(l)), const legacy&>::value), ""); |
| #else // C++ < 11 |
| // In C++03 we don't have noexcept so we can never move :-( |
| static_assert((std::is_same<decltype(std::move_if_noexcept(i)), const int&>::value), ""); |
| static_assert((std::is_same<decltype(std::move_if_noexcept(ci)), const int&>::value), ""); |
| static_assert((std::is_same<decltype(std::move_if_noexcept(a)), const A&>::value), ""); |
| static_assert((std::is_same<decltype(std::move_if_noexcept(ca)), const A&>::value), ""); |
| static_assert((std::is_same<decltype(std::move_if_noexcept(l)), const legacy&>::value), ""); |
| #endif |
| |
| #if TEST_STD_VER > 11 |
| constexpr int i1 = 23; |
| constexpr int i2 = std::move_if_noexcept(i1); |
| static_assert(i2 == 23, "" ); |
| #endif |
| |
| |
| return 0; |
| } |