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435e56fb | 1 | // { dg-options "-std=gnu++17" } |
47df7e19 | 2 | // { dg-do run { target c++17 } } |
435e56fb | 3 | |
8d9254fc | 4 | // Copyright (C) 2013-2020 Free Software Foundation, Inc. |
435e56fb VV |
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 | ||
c7cbb4da | 17 | // You should have received a copy of the GNU General Public License along |
435e56fb VV |
18 | // with this library; see the file COPYING3. If not see |
19 | // <http://www.gnu.org/licenses/>. | |
20 | ||
21 | #include <optional> | |
22 | #include <testsuite_hooks.h> | |
23 | ||
24 | struct tracker | |
25 | { | |
26 | tracker(int value) : value(value) { ++count; } | |
27 | ~tracker() { --count; } | |
28 | ||
29 | tracker(tracker const& other) : value(other.value) { ++count; } | |
30 | tracker(tracker&& other) : value(other.value) | |
31 | { | |
32 | other.value = -1; | |
33 | ++count; | |
34 | } | |
35 | ||
36 | tracker& operator=(tracker const&) = default; | |
37 | tracker& operator=(tracker&&) = default; | |
38 | ||
39 | int value; | |
40 | ||
41 | static int count; | |
42 | }; | |
43 | ||
44 | int tracker::count = 0; | |
45 | ||
46 | struct exception { }; | |
47 | ||
48 | struct throwing_move | |
49 | { | |
50 | throwing_move() = default; | |
51 | throwing_move(throwing_move const&) { throw exception {}; } | |
52 | }; | |
53 | ||
54 | int main() | |
55 | { | |
56 | // [20.5.4.1] Constructors | |
57 | ||
58 | { | |
59 | std::optional<long> o; | |
60 | auto moved_to = std::move(o); | |
61 | VERIFY( !moved_to ); | |
62 | VERIFY( !o ); | |
63 | } | |
64 | ||
65 | { | |
66 | const long val = 0x1234ABCD; | |
67 | std::optional<long> o { std::in_place, val}; | |
68 | auto moved_to = std::move(o); | |
69 | VERIFY( moved_to ); | |
70 | VERIFY( *moved_to == val ); | |
71 | VERIFY( o && *o == val ); | |
72 | } | |
73 | ||
74 | { | |
75 | std::optional<tracker> o; | |
76 | auto moved_to = std::move(o); | |
77 | VERIFY( !moved_to ); | |
78 | VERIFY( tracker::count == 0 ); | |
79 | VERIFY( !o ); | |
80 | } | |
81 | ||
82 | { | |
83 | std::optional<tracker> o { std::in_place, 333 }; | |
84 | auto moved_to = std::move(o); | |
85 | VERIFY( moved_to ); | |
86 | VERIFY( moved_to->value == 333 ); | |
87 | VERIFY( tracker::count == 2 ); | |
88 | VERIFY( o && o->value == -1 ); | |
89 | } | |
90 | ||
91 | enum outcome { nothrow, caught, bad_catch }; | |
92 | ||
93 | { | |
94 | outcome result = nothrow; | |
95 | std::optional<throwing_move> o; | |
96 | ||
97 | try | |
98 | { | |
99 | auto moved_to = std::move(o); | |
100 | } | |
101 | catch(exception const&) | |
102 | { result = caught; } | |
103 | catch(...) | |
104 | { result = bad_catch; } | |
105 | ||
106 | VERIFY( result == nothrow ); | |
107 | } | |
108 | ||
109 | { | |
110 | outcome result = nothrow; | |
111 | std::optional<throwing_move> o { std::in_place }; | |
112 | ||
113 | try | |
114 | { | |
115 | auto moved_to = std::move(o); | |
116 | } | |
117 | catch(exception const&) | |
118 | { result = caught; } | |
119 | catch(...) | |
120 | { result = bad_catch; } | |
121 | ||
122 | VERIFY( result == caught ); | |
123 | } | |
124 | ||
125 | VERIFY( tracker::count == 0 ); | |
126 | } |