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& operator=(packaged_task&& other);
18
19#include <future>
20#include <cassert>
21
22class A
23{
24    long data_;
25
26public:
27    explicit A(long i) : data_(i) {}
28
29    long operator()(long i, long j) const {return data_ + i + j;}
30};
31
32int main()
33{
34    {
35        std::packaged_task<double(int, char)> p0(A(5));
36        std::packaged_task<double(int, char)> p;
37        p = std::move(p0);
38        assert(!p0.valid());
39        assert(p.valid());
40        std::future<double> f = p.get_future();
41        p(3, 'a');
42        assert(f.get() == 105.0);
43    }
44    {
45        std::packaged_task<double(int, char)> p0;
46        std::packaged_task<double(int, char)> p;
47        p = std::move(p0);
48        assert(!p0.valid());
49        assert(!p.valid());
50    }
51}
52