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 // ~packaged_task();
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 {return data_ + i + j;}
29 };
30
func(std::packaged_task<double (int,char)> p)31 void func(std::packaged_task<double(int, char)> p)
32 {
33 }
34
func2(std::packaged_task<double (int,char)> p)35 void func2(std::packaged_task<double(int, char)> p)
36 {
37 p(3, 'a');
38 }
39
main()40 int main()
41 {
42 {
43 std::packaged_task<double(int, char)> p(A(5));
44 std::future<double> f = p.get_future();
45 std::thread(func, std::move(p)).detach();
46 try
47 {
48 double i = f.get();
49 assert(false);
50 }
51 catch (const std::future_error& e)
52 {
53 assert(e.code() == make_error_code(std::future_errc::broken_promise));
54 }
55 }
56 {
57 std::packaged_task<double(int, char)> p(A(5));
58 std::future<double> f = p.get_future();
59 std::thread(func2, std::move(p)).detach();
60 assert(f.get() == 105.0);
61 }
62 }
63