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 // ~packaged_task();
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 {return data_ + i + j;}
31 };
32 
33 void func(std::packaged_task<double(int, char)> p)
34 {
35 }
36 
37 void func2(std::packaged_task<double(int, char)> p)
38 {
39     p(3, 'a');
40 }
41 
42 int main()
43 {
44     {
45         std::packaged_task<double(int, char)> p(A(5));
46         std::future<double> f = p.get_future();
47         std::thread(func, std::move(p)).detach();
48         try
49         {
50             double i = f.get();
51             assert(false);
52         }
53         catch (const std::future_error& e)
54         {
55             assert(e.code() == make_error_code(std::future_errc::broken_promise));
56         }
57     }
58     {
59         std::packaged_task<double(int, char)> p(A(5));
60         std::future<double> f = p.get_future();
61         std::thread(func2, std::move(p)).detach();
62         assert(f.get() == 105.0);
63     }
64 }
65