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(packaged_task&) = delete;
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(p0);
34        assert(!p0.valid());
35        assert(p.valid());
36        std::future<double> f = p.get_future();
37        p(3, 'a');
38        assert(f.get() == 105.0);
39    }
40    {
41        std::packaged_task<double(int, char)> p0;
42        std::packaged_task<double(int, char)> p(p0);
43        assert(!p0.valid());
44        assert(!p.valid());
45    }
46}
47