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