37 lines
765 B
C++
37 lines
765 B
C++
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <future>
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// class promise<R>
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// void promise<R&>::set_value_at_thread_exit(R& r);
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#include <future>
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#include <memory>
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#include <cassert>
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int i = 0;
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void func(std::promise<int&>& p)
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{
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p.set_value_at_thread_exit(i);
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i = 4;
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}
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int main()
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{
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{
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std::promise<int&> p;
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std::future<int&> f = p.get_future();
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std::thread(func, std::move(p)).detach();
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assert(f.get() == 4);
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}
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}
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