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:
A(long i)26     explicit A(long i) : data_(i) {}
27 
operator ()(long i,long j) const28     long operator()(long i, long j) const
29     {
30         if (j == 'z')
31             throw A(6);
32         return data_ + i + j;
33     }
34 };
35 
main()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