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// void reset();
15
16#include <future>
17#include <cassert>
18
19class A
20{
21    long data_;
22
23public:
24    explicit A(long i) : data_(i) {}
25
26    long operator()(long i, long j) const
27    {
28        if (j == 'z')
29            throw A(6);
30        return data_ + i + j;
31    }
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        p.reset();
42        p(4, 'a');
43        f = p.get_future();
44        assert(f.get() == 106.0);
45    }
46    {
47        std::packaged_task<double(int, char)> p;
48        try
49        {
50            p.reset();
51            assert(false);
52        }
53        catch (const std::future_error& e)
54        {
55            assert(e.code() == make_error_code(std::future_errc::no_state));
56        }
57    }
58}
59