1// Copyright (C) 2013-2020 Free Software Foundation, Inc.
2//
3// This file is part of the GNU ISO C++ Library.  This library is free
4// software; you can redistribute it and/or modify it under the
5// terms of the GNU General Public License as published by the
6// Free Software Foundation; either version 3, or (at your option)
7// any later version.
8
9// This library is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13
14// You should have received a copy of the GNU General Public License along
15// with this library; see the file COPYING3.  If not see
16// <http://www.gnu.org/licenses/>.
17
18namespace cons_copy {
19
20struct tracker
21{
22  tracker(int value) : value(value) { ++count; }
23  ~tracker() { --count; }
24
25  tracker(tracker const& other) : value(other.value) { ++count; }
26  tracker(tracker&& other) : value(other.value)
27  {
28    other.value = -1;
29    ++count;
30  }
31
32  tracker& operator=(tracker const&) = default;
33  tracker& operator=(tracker&&) = default;
34
35  int value;
36
37  static int count;
38};
39
40int tracker::count = 0;
41
42struct exception { };
43
44struct throwing_copy
45{
46  throwing_copy() = default;
47  throwing_copy(throwing_copy const&) { throw exception {}; }
48};
49
50static void
51test ()
52{
53  // [20.5.4.1] Constructors
54
55  {
56    gdb::optional<long> o;
57    auto copy = o;
58    VERIFY( !copy );
59    VERIFY( !o );
60  }
61
62  {
63    const long val = 0x1234ABCD;
64    gdb::optional<long> o { gdb::in_place, val};
65    auto copy = o;
66    VERIFY( copy );
67    VERIFY( *copy == val );
68#ifndef GDB_OPTIONAL
69    VERIFY( o && o == val );
70#endif
71  }
72
73  {
74    gdb::optional<tracker> o;
75    auto copy = o;
76    VERIFY( !copy );
77    VERIFY( tracker::count == 0 );
78    VERIFY( !o );
79  }
80
81  {
82    gdb::optional<tracker> o { gdb::in_place, 333 };
83    auto copy = o;
84    VERIFY( copy );
85    VERIFY( copy->value == 333 );
86    VERIFY( tracker::count == 2 );
87    VERIFY( o && o->value == 333 );
88  }
89
90  enum outcome { nothrow, caught, bad_catch };
91
92  {
93    outcome result = nothrow;
94    gdb::optional<throwing_copy> o;
95
96    try
97    {
98      auto copy = o;
99    }
100    catch(exception const&)
101    { result = caught; }
102    catch(...)
103    { result = bad_catch; }
104
105    VERIFY( result == nothrow );
106  }
107
108  {
109    outcome result = nothrow;
110    gdb::optional<throwing_copy> o { gdb::in_place };
111
112    try
113    {
114      auto copy = o;
115    }
116    catch(exception const&)
117    { result = caught; }
118    catch(...)
119    { result = bad_catch; }
120
121    VERIFY( result == caught );
122  }
123
124  VERIFY( tracker::count == 0 );
125}
126
127} // namespace cons_copy
128