]>
Commit | Line | Data |
---|---|---|
435e56fb VV |
1 | // { dg-options "-std=gnu++17" } |
2 | // { dg-do run } | |
3 | ||
4 | // Copyright (C) 2013-2016 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 | ||
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> | |
a577f786 | 22 | #include <vector> |
435e56fb VV |
23 | #include <testsuite_hooks.h> |
24 | ||
25 | int counter = 0; | |
26 | ||
27 | struct mixin_counter | |
28 | { | |
29 | mixin_counter() { ++counter; } | |
30 | mixin_counter(mixin_counter const&) { ++counter; } | |
31 | ~mixin_counter() { --counter; } | |
32 | }; | |
33 | ||
34 | struct value_type : private mixin_counter { }; | |
35 | ||
36 | int main() | |
37 | { | |
38 | using O = std::optional<value_type>; | |
39 | ||
40 | // Check std::nullopt_t and 'default' (= {}) assignment | |
41 | ||
42 | { | |
43 | O o; | |
44 | o = std::nullopt; | |
45 | VERIFY( !o ); | |
46 | } | |
47 | ||
48 | { | |
49 | O o { std::in_place }; | |
50 | o = std::nullopt; | |
51 | VERIFY( !o ); | |
52 | } | |
53 | ||
54 | { | |
55 | O o; | |
56 | o = {}; | |
57 | VERIFY( !o ); | |
58 | } | |
59 | ||
60 | { | |
61 | O o { std::in_place }; | |
62 | o = {}; | |
63 | VERIFY( !o ); | |
64 | } | |
a577f786 VV |
65 | { |
66 | std::optional<std::vector<int>> ovi{{1, 2, 3}}; | |
67 | VERIFY(ovi->size() == 3); | |
68 | VERIFY((*ovi)[0] == 1 && (*ovi)[1] == 2 && (*ovi)[2] == 3); | |
69 | ovi = {4, 5, 6, 7}; | |
70 | VERIFY(ovi->size() == 4); | |
71 | VERIFY((*ovi)[0] == 4 && (*ovi)[1] == 5 && | |
72 | (*ovi)[2] == 6 && (*ovi)[3] == 7); | |
73 | } | |
435e56fb VV |
74 | VERIFY( counter == 0 ); |
75 | } |