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// packaged_task& operator=(packaged_task&& other);
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 {return data_ + i + j;}
27};
28
29int main()
30{
31    {
32        std::packaged_task<double(int, char)> p0(A(5));
33        std::packaged_task<double(int, char)> p;
34        p = std::move(p0);
35        assert(!p0.valid());
36        assert(p.valid());
37        std::future<double> f = p.get_future();
38        p(3, 'a');
39        assert(f.get() == 105.0);
40    }
41    {
42        std::packaged_task<double(int, char)> p0;
43        std::packaged_task<double(int, char)> p;
44        p = std::move(p0);
45        assert(!p0.valid());
46        assert(!p.valid());
47    }
48}
49