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 packaged_task<R(ArgTypes...)> 16 17 // void reset(); 18 19 #include <future> 20 #include <cassert> 21 22 class A 23 { 24 long data_; 25 26 public: A(long i)27 explicit A(long i) : data_(i) {} 28 operator ()(long i,long j) const29 long operator()(long i, long j) const 30 { 31 if (j == 'z') 32 throw A(6); 33 return data_ + i + j; 34 } 35 }; 36 main()37int main() 38 { 39 { 40 std::packaged_task<double(int, char)> p(A(5)); 41 std::future<double> f = p.get_future(); 42 p(3, 'a'); 43 assert(f.get() == 105.0); 44 p.reset(); 45 p(4, 'a'); 46 f = p.get_future(); 47 assert(f.get() == 106.0); 48 } 49 { 50 std::packaged_task<double(int, char)> p; 51 try 52 { 53 p.reset(); 54 assert(false); 55 } 56 catch (const std::future_error& e) 57 { 58 assert(e.code() == make_error_code(std::future_errc::no_state)); 59 } 60 } 61 } 62