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 12 // <future> 13 14 // class packaged_task<R(ArgTypes...)> 15 16 // void reset(); 17 18 #include <future> 19 #include <cassert> 20 21 class A 22 { 23 long data_; 24 25 public: 26 explicit A(long i) : data_(i) {} 27 28 long operator()(long i, long j) const 29 { 30 if (j == 'z') 31 throw A(6); 32 return data_ + i + j; 33 } 34 }; 35 36 int main() 37 { 38 { 39 std::packaged_task<double(int, char)> p(A(5)); 40 std::future<double> f = p.get_future(); 41 p(3, 'a'); 42 assert(f.get() == 105.0); 43 p.reset(); 44 p(4, 'a'); 45 f = p.get_future(); 46 assert(f.get() == 106.0); 47 } 48 { 49 std::packaged_task<double(int, char)> p; 50 try 51 { 52 p.reset(); 53 assert(false); 54 } 55 catch (const std::future_error& e) 56 { 57 assert(e.code() == make_error_code(std::future_errc::no_state)); 58 } 59 } 60 } 61
