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//===----------------------------------------------------------------------===//
//
// 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;
}
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