| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <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> |
| |
| class A |
| { |
| A(const A&); |
| A& operator=(const A&); |
| public: |
| |
| A() {} |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| A(A&&) {} |
| #endif |
| }; |
| |
| struct legacy |
| { |
| legacy() {} |
| legacy(const legacy&); |
| }; |
| |
| int main() |
| { |
| int i = 0; |
| const int ci = 0; |
| |
| legacy l; |
| A a; |
| const A ca; |
| |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| 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), ""); |
| #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| 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), ""); |
| #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| static_assert((std::is_same<decltype(std::move_if_noexcept(l)), const legacy&>::value), ""); |
| |
| } |