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//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// <future>
// class promise<R>
// void promise<R&>::set_value_at_thread_exit(R& r);
#include <future>
#include <memory>
#include <cassert>
int i = 0;
void func(std::promise<int&> p)
{
p.set_value_at_thread_exit(i);
i = 4;
}
int main()
{
{
std::promise<int&> p;
std::future<int&> f = p.get_future();
std::thread(func, std::move(p)).detach();
assert(f.get() == 4);
}
}
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