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435e56fb | 1 | // { dg-options "-std=gnu++17" } |
47df7e19 | 2 | // { dg-do run { target c++17 } } |
435e56fb | 3 | |
99dee823 | 4 | // Copyright (C) 2013-2021 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 | ||
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 <optional> | |
22 | #include <testsuite_hooks.h> | |
23 | ||
24 | struct 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 | ||
38 | int tracker::count = 0; | |
39 | ||
40 | int main() | |
41 | { | |
42 | // [20.5.4.1] Constructors | |
43 | ||
44 | { | |
45 | std::optional<tracker> o; | |
46 | VERIFY( !o ); | |
47 | } | |
48 | ||
49 | { | |
50 | std::optional<tracker> o {}; | |
51 | VERIFY( !o ); | |
52 | } | |
53 | ||
54 | { | |
55 | std::optional<tracker> o = {}; | |
56 | VERIFY( !o ); | |
57 | } | |
58 | ||
59 | VERIFY( tracker::count == 0 ); | |
60 | } |