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 // future<R> get_future(); 18 19 #include <future> 20 #include <cassert> 21 22 #include "test_macros.h" 23 24 int main() 25 { 26 { 27 std::promise<double> p; 28 std::future<double> f = p.get_future(); 29 p.set_value(105.5); 30 assert(f.get() == 105.5); 31 } 32 #ifndef TEST_HAS_NO_EXCEPTIONS 33 { 34 std::promise<double> p; 35 std::future<double> f = p.get_future(); 36 try 37 { 38 f = p.get_future(); 39 assert(false); 40 } 41 catch (const std::future_error& e) 42 { 43 assert(e.code() == make_error_code(std::future_errc::future_already_retrieved)); 44 } 45 } 46 { 47 std::promise<double> p; 48 std::promise<double> p0 = std::move(p); 49 try 50 { 51 std::future<double> f = p.get_future(); 52 assert(false); 53 } 54 catch (const std::future_error& e) 55 { 56 assert(e.code() == make_error_code(std::future_errc::no_state)); 57 } 58 } 59 #endif 60 } 61
