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 #include "test_macros.h" 23 24 class A 25 { 26 long data_; 27 28 public: 29 explicit A(long i) : data_(i) {} 30 31 long operator()(long i, long j) const 32 { 33 return data_ + i + j; 34 } 35 }; 36 37 int 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 #ifndef TEST_HAS_NO_EXCEPTIONS 50 { 51 std::packaged_task<double(int, char)> p; 52 try 53 { 54 p.reset(); 55 assert(false); 56 } 57 catch (const std::future_error& e) 58 { 59 assert(e.code() == make_error_code(std::future_errc::no_state)); 60 } 61 } 62 #endif 63 } 64
