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 // ~promise(); 15 16 #include <future> 17 #include <cassert> 18 19 int main() 20 { 21 { 22 typedef int T; 23 std::future<T> f; 24 { 25 std::promise<T> p; 26 f = p.get_future(); 27 p.set_value(3); 28 } 29 assert(f.get() == 3); 30 } 31 { 32 typedef int T; 33 std::future<T> f; 34 { 35 std::promise<T> p; 36 f = p.get_future(); 37 } 38 try 39 { 40 T i = f.get(); 41 assert(false); 42 } 43 catch (const std::future_error& e) 44 { 45 assert(e.code() == make_error_code(std::future_errc::broken_promise)); 46 } 47 } 48 49 { 50 typedef int& T; 51 int i = 4; 52 std::future<T> f; 53 { 54 std::promise<T> p; 55 f = p.get_future(); 56 p.set_value(i); 57 } 58 assert(&f.get() == &i); 59 } 60 { 61 typedef int& T; 62 std::future<T> f; 63 { 64 std::promise<T> p; 65 f = p.get_future(); 66 } 67 try 68 { 69 T i = f.get(); 70 assert(false); 71 } 72 catch (const std::future_error& e) 73 { 74 assert(e.code() == make_error_code(std::future_errc::broken_promise)); 75 } 76 } 77 78 { 79 typedef void T; 80 std::future<T> f; 81 { 82 std::promise<T> p; 83 f = p.get_future(); 84 p.set_value(); 85 } 86 f.get(); 87 assert(true); 88 } 89 { 90 typedef void T; 91 std::future<T> f; 92 { 93 std::promise<T> p; 94 f = p.get_future(); 95 } 96 try 97 { 98 f.get(); 99 assert(false); 100 } 101 catch (const std::future_error& e) 102 { 103 assert(e.code() == make_error_code(std::future_errc::broken_promise)); 104 } 105 } 106 } 107
