| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17 |
| |
| // <functional> |
| // |
| // reference_wrapper |
| // |
| // template <ObjectType T> reference_wrapper<T> ref(T& t); |
| // |
| // where T is an incomplete type (since C++20) |
| |
| #include <functional> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| |
| struct Foo; |
| |
| Foo& get_foo(); |
| |
| void test() { |
| Foo& foo = get_foo(); |
| std::reference_wrapper<Foo> ref = std::ref(foo); |
| assert(&ref.get() == &foo); |
| } |
| |
| struct Foo { }; |
| |
| Foo& get_foo() { |
| static Foo foo; |
| return foo; |
| } |
| |
| int main() { |
| test(); |
| } |