| //===----------------------------------------------------------------------===// |
| // |
| // 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: libcpp-has-no-threads |
| // UNSUPPORTED: c++98, c++03 |
| |
| // <future> |
| |
| // class promise<R> |
| |
| // void promise<R&>::set_value_at_thread_exit(R& r); |
| |
| #include <future> |
| #include <memory> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| int i = 0; |
| |
| void func(std::promise<int&> p) |
| { |
| p.set_value_at_thread_exit(i); |
| i = 4; |
| } |
| |
| int main(int, char**) |
| { |
| { |
| std::promise<int&> p; |
| std::future<int&> f = p.get_future(); |
| std::thread(func, std::move(p)).detach(); |
| assert(f.get() == 4); |
| } |
| |
| return 0; |
| } |