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 // XFAIL: libcpp-no-exceptions
11 // UNSUPPORTED: libcpp-has-no-threads
12 // UNSUPPORTED: c++98, c++03
13 
14 // <future>
15 
16 // class packaged_task<R(ArgTypes...)>
17 
18 // void reset();
19 
20 #include <future>
21 #include <cassert>
22 
23 class A
24 {
25     long data_;
26 
27 public:
28     explicit A(long i) : data_(i) {}
29 
30     long operator()(long i, long j) const
31     {
32         if (j == 'z')
33             throw A(6);
34         return data_ + i + j;
35     }
36 };
37 
38 int main()
39 {
40     {
41         std::packaged_task<double(int, char)> p(A(5));
42         std::future<double> f = p.get_future();
43         p(3, 'a');
44         assert(f.get() == 105.0);
45         p.reset();
46         p(4, 'a');
47         f = p.get_future();
48         assert(f.get() == 106.0);
49     }
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 }
63