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// future<R> get_future();
18
19#include <future>
20#include <cassert>
21
22#include "test_macros.h"
23
24class A
25{
26    long data_;
27
28public:
29    explicit A(long i) : data_(i) {}
30
31    long operator()(long i, long j) const {return data_ + i + j;}
32};
33
34int main()
35{
36    {
37        std::packaged_task<double(int, char)> p(A(5));
38        std::future<double> f = p.get_future();
39        p(3, 'a');
40        assert(f.get() == 105.0);
41    }
42#ifndef TEST_HAS_NO_EXCEPTIONS
43    {
44        std::packaged_task<double(int, char)> p(A(5));
45        std::future<double> f = p.get_future();
46        try
47        {
48            f = p.get_future();
49            assert(false);
50        }
51        catch (const std::future_error& e)
52        {
53            assert(e.code() ==  make_error_code(std::future_errc::future_already_retrieved));
54        }
55    }
56    {
57        std::packaged_task<double(int, char)> p;
58        try
59        {
60            std::future<double> f = p.get_future();
61            assert(false);
62        }
63        catch (const std::future_error& e)
64        {
65            assert(e.code() ==  make_error_code(std::future_errc::no_state));
66        }
67    }
68#endif
69}
70