1f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant//===----------------------------------------------------------------------===// 2f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant// 3f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant// The LLVM Compiler Infrastructure 4f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant// 8f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant//===----------------------------------------------------------------------===// 9f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant 10f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant// <future> 11f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant 12f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant// class promise<R> 13f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant 14f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant// void promise<R&>::set_value(R& r); 15f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant 16f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant#include <future> 17f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant#include <cassert> 18f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant 19f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnantint main() 20f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant{ 21f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant { 22f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant typedef int& T; 23f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant int i = 3; 24f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant std::promise<T> p; 25f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant std::future<T> f = p.get_future(); 26f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant p.set_value(i); 2754da338f59b56e267dd6d1c0981e3c607c94c2b7Howard Hinnant int& j = f.get(); 2854da338f59b56e267dd6d1c0981e3c607c94c2b7Howard Hinnant assert(j == 3); 29f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant ++i; 3054da338f59b56e267dd6d1c0981e3c607c94c2b7Howard Hinnant assert(j == 4); 31f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant try 32f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant { 33f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant p.set_value(i); 34f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant assert(false); 35f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant } 36f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant catch (const std::future_error& e) 37f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant { 38f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant assert(e.code() == make_error_code(std::future_errc::promise_already_satisfied)); 39f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant } 40f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant } 41f39daa8e5a5f7d7eb19f391497a29b4fa0eec28dHoward Hinnant} 42