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 // UNSUPPORTED: libcpp-no-exceptions 11 // UNSUPPORTED: libcpp-has-no-threads 12 // UNSUPPORTED: c++98, c++03 13 14 // <future> 15 16 // class promise<R> 17 18 // void promise<void>::set_value(); 19 20 #include <future> 21 #include <cassert> 22 main()23int main() 24 { 25 { 26 typedef void T; 27 std::promise<T> p; 28 std::future<T> f = p.get_future(); 29 p.set_value(); 30 f.get(); 31 try 32 { 33 p.set_value(); 34 assert(false); 35 } 36 catch (const std::future_error& e) 37 { 38 assert(e.code() == make_error_code(std::future_errc::promise_already_satisfied)); 39 } 40 } 41 } 42