| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // type_traits |
| |
| // add_rvalue_reference |
| // If T names a referenceable type then the member typedef type |
| // shall name T&&; otherwise, type shall name T. |
| |
| #include <type_traits> |
| #include "test_macros.h" |
| |
| template <class T, class U> |
| void test_add_rvalue_reference() |
| { |
| ASSERT_SAME_TYPE(U, typename std::add_rvalue_reference<T>::type); |
| #if TEST_STD_VER > 11 |
| ASSERT_SAME_TYPE(U, std::add_rvalue_reference_t<T>); |
| #endif |
| } |
| |
| template <class F> |
| void test_function0() |
| { |
| ASSERT_SAME_TYPE(F&&, typename std::add_rvalue_reference<F>::type); |
| #if TEST_STD_VER > 11 |
| ASSERT_SAME_TYPE(F&&, std::add_rvalue_reference_t<F>); |
| #endif |
| } |
| |
| template <class F> |
| void test_function1() |
| { |
| ASSERT_SAME_TYPE(F, typename std::add_rvalue_reference<F>::type); |
| #if TEST_STD_VER > 11 |
| ASSERT_SAME_TYPE(F, std::add_rvalue_reference_t<F>); |
| #endif |
| } |
| |
| struct Foo {}; |
| |
| int main(int, char**) |
| { |
| test_add_rvalue_reference<void, void>(); |
| test_add_rvalue_reference<int, int&&>(); |
| test_add_rvalue_reference<int[3], int(&&)[3]>(); |
| test_add_rvalue_reference<int&, int&>(); |
| test_add_rvalue_reference<const int&, const int&>(); |
| test_add_rvalue_reference<int*, int*&&>(); |
| test_add_rvalue_reference<const int*, const int*&&>(); |
| test_add_rvalue_reference<Foo, Foo&&>(); |
| |
| // LWG 2101 specifically talks about add_rvalue_reference and functions. |
| // The term of art is "a referenceable type", which a cv- or ref-qualified function is not. |
| test_function0<void()>(); |
| test_function1<void() const>(); |
| test_function1<void() &>(); |
| test_function1<void() &&>(); |
| test_function1<void() const &>(); |
| test_function1<void() const &&>(); |
| |
| // But a cv- or ref-qualified member function *is* "a referenceable type" |
| test_function0<void (Foo::*)()>(); |
| test_function0<void (Foo::*)() const>(); |
| test_function0<void (Foo::*)() &>(); |
| test_function0<void (Foo::*)() &&>(); |
| test_function0<void (Foo::*)() const &>(); |
| test_function0<void (Foo::*)() const &&>(); |
| |
| return 0; |
| } |