1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <future> 11 12 // class promise<R> 13 14 // void promise<R&>::set_value_at_thread_exit(R& r); 15 16 #include <future> 17 #include <memory> 18 #include <cassert> 19 20 int i = 0; 21 22 void func(std::promise<int&> p) 23 { 24 p.set_value_at_thread_exit(i); 25 i = 4; 26 } 27 28 int main() 29 { 30 { 31 std::promise<int&> p; 32 std::future<int&> f = p.get_future(); 33 std::thread(func, std::move(p)).detach(); 34 assert(f.get() == 4); 35 } 36 } 37
