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 // UNSUPPORTED: c++98, c++03
12
13 // <future>
14
15 // class packaged_task<R(ArgTypes...)>
16
17 // ~packaged_task();
18
19 #include <future>
20 #include <cassert>
21
22 #include "test_macros.h"
23
24 class A
25 {
26 long data_;
27
28 public:
A(long i)29 explicit A(long i) : data_(i) {}
30
operator ()(long i,long j) const31 long operator()(long i, long j) const {return data_ + i + j;}
32 };
33
func(std::packaged_task<double (int,char)>)34 void func(std::packaged_task<double(int, char)>)
35 {
36 }
37
func2(std::packaged_task<double (int,char)> p)38 void func2(std::packaged_task<double(int, char)> p)
39 {
40 p(3, 'a');
41 }
42
main()43 int main()
44 {
45 #ifndef TEST_HAS_NO_EXCEPTIONS
46 {
47 std::packaged_task<double(int, char)> p(A(5));
48 std::future<double> f = p.get_future();
49 std::thread(func, std::move(p)).detach();
50 try
51 {
52 double i = f.get();
53 ((void)i); // Prevent unused warning
54 assert(false);
55 }
56 catch (const std::future_error& e)
57 {
58 assert(e.code() == make_error_code(std::future_errc::broken_promise));
59 }
60 }
61 #endif
62 {
63 std::packaged_task<double(int, char)> p(A(5));
64 std::future<double> f = p.get_future();
65 std::thread(func2, std::move(p)).detach();
66 assert(f.get() == 105.0);
67 }
68 }
69