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// void reset();
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
32    {
33        return data_ + i + j;
34    }
35};
36
37int main()
38{
39    {
40        std::packaged_task<double(int, char)> p(A(5));
41        std::future<double> f = p.get_future();
42        p(3, 'a');
43        assert(f.get() == 105.0);
44        p.reset();
45        p(4, 'a');
46        f = p.get_future();
47        assert(f.get() == 106.0);
48    }
49#ifndef TEST_HAS_NO_EXCEPTIONS
50    {
51        std::packaged_task<double(int, char)> p;
52        try
53        {
54            p.reset();
55            assert(false);
56        }
57        catch (const std::future_error& e)
58        {
59            assert(e.code() == make_error_code(std::future_errc::no_state));
60        }
61    }
62#endif
63}
64