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 // <future>
11
12 // class packaged_task<R(ArgTypes...)>
13
14 // ~packaged_task();
15
16 #include <future>
17 #include <cassert>
18
19 class A
20 {
21 long data_;
22
23 public:
A(long i)24 explicit A(long i) : data_(i) {}
25
operator ()(long i,long j) const26 long operator()(long i, long j) const {return data_ + i + j;}
27 };
28
func(std::packaged_task<double (int,char)> p)29 void func(std::packaged_task<double(int, char)> p)
30 {
31 }
32
func2(std::packaged_task<double (int,char)> p)33 void func2(std::packaged_task<double(int, char)> p)
34 {
35 p(3, 'a');
36 }
37
main()38 int main()
39 {
40 {
41 std::packaged_task<double(int, char)> p(A(5));
42 std::future<double> f = p.get_future();
43 std::thread(func, std::move(p)).detach();
44 try
45 {
46 double i = f.get();
47 assert(false);
48 }
49 catch (const std::future_error& e)
50 {
51 assert(e.code() == make_error_code(std::future_errc::broken_promise));
52 }
53 }
54 {
55 std::packaged_task<double(int, char)> p(A(5));
56 std::future<double> f = p.get_future();
57 std::thread(func2, std::move(p)).detach();
58 assert(f.get() == 105.0);
59 }
60 }
61