1// { dg-options "-std=gnu++14" }
2// { dg-do run }
3
4// Copyright (C) 2013-2015 Free Software Foundation, Inc.
5//
6// This file is part of the GNU ISO C++ Library.  This library is free
7// software; you can redistribute it and/or modify it under the
8// terms of the GNU General Public License as published by the
9// Free Software Foundation; either version 3, or (at your option)
10// any later version.
11
12// This library is distributed in the hope that it will be useful,
13// but WITHOUT ANY WARRANTY; without even the implied warranty of
14// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15// GNU General Public License for more details.
16
17// You should have received a copy of the GNU General Public License along
18// with this library; see the file COPYING3.  If not see
19// <http://www.gnu.org/licenses/>.
20
21#include <experimental/optional>
22#include <testsuite_hooks.h>
23
24struct tracker
25{
26  tracker() { ++count; }
27  ~tracker() { --count; }
28
29  tracker(tracker const&) { ++count; }
30  tracker(tracker&&) { ++count; }
31
32  tracker& operator=(tracker const&) = default;
33  tracker& operator=(tracker&&) = default;
34
35  static int count;
36};
37
38int tracker::count = 0;
39
40int main()
41{
42  // [20.5.4.1] Constructors
43
44  {
45    std::experimental::optional<tracker> o;
46    VERIFY( !o );
47  }
48
49  {
50    std::experimental::optional<tracker> o {};
51    VERIFY( !o );
52  }
53
54  {
55    std::experimental::optional<tracker> o = {};
56    VERIFY( !o );
57  }
58
59  VERIFY( tracker::count == 0 );
60}
61