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 // Copyright (C) 2011 Vicente J. Botet Escriba
11 //
12 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
13 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
14 
15 // <boost/thread/future.hpp>
16 
17 // class packaged_task<R>
18 
19 // void swap(packaged_task& other);
20 
21 #define BOOST_THREAD_VERSION 4
22 #if BOOST_THREAD_VERSION == 4
23 #define BOOST_THREAD_DETAIL_SIGNATURE double()
24 #else
25 #define BOOST_THREAD_DETAIL_SIGNATURE double
26 #endif
27 
28 #include <boost/thread/future.hpp>
29 #include <boost/detail/lightweight_test.hpp>
30 
31 class A
32 {
33   long data_;
34 
35 public:
A(long i)36   explicit A(long i) :
37     data_(i)
38   {
39   }
40 
operator ()() const41   long operator()() const
42   {
43     return data_;
44   }
operator ()(long i,long j) const45   long operator()(long i, long j) const
46   {
47     return data_ + i + j;
48   }
49 };
50 
main()51 int main()
52 {
53   {
54     boost::packaged_task<BOOST_THREAD_DETAIL_SIGNATURE> p0(A(5));
55     boost::packaged_task<BOOST_THREAD_DETAIL_SIGNATURE> p;
56     p.swap(p0);
57     BOOST_TEST(!p0.valid());
58     BOOST_TEST(p.valid());
59     boost::future<double> f = BOOST_THREAD_MAKE_RV_REF(p.get_future());
60     //p(3, 'a');
61     p();
62     BOOST_TEST(f.get() == 5.0);
63   }
64   {
65     boost::packaged_task<BOOST_THREAD_DETAIL_SIGNATURE> p0;
66     boost::packaged_task<BOOST_THREAD_DETAIL_SIGNATURE> p;
67     p.swap(p0);
68     BOOST_TEST(!p0.valid());
69     BOOST_TEST(!p.valid());
70   }
71 
72   return boost::report_errors();
73 }
74 
75