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-has-no-threads 11 // UNSUPPORTED: c++98, c++03 12 13 // <future> 14 15 // class promise<R> 16 17 // void promise<R&>::set_value(R& r); 18 19 #include <future> 20 #include <cassert> 21 22 #include "test_macros.h" 23 24 int main() 25 { 26 { 27 typedef int& T; 28 int i = 3; 29 std::promise<T> p; 30 std::future<T> f = p.get_future(); 31 p.set_value(i); 32 int& j = f.get(); 33 assert(j == 3); 34 ++i; 35 assert(j == 4); 36 #ifndef TEST_HAS_NO_EXCEPTIONS 37 try 38 { 39 p.set_value(i); 40 assert(false); 41 } 42 catch (const std::future_error& e) 43 { 44 assert(e.code() == make_error_code(std::future_errc::promise_already_satisfied)); 45 } 46 #endif 47 } 48 } 49
