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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> | |
22 | #include <testsuite_hooks.h> | |
23 | ||
24 | #include <tuple> | |
25 | #include <string> | |
26 | ||
27 | namespace ns | |
28 | { | |
29 | struct value_type | |
30 | { | |
31 | int i; | |
32 | std::string s; | |
33 | }; | |
34 | ||
35 | bool | |
36 | operator==(value_type const& lhs, value_type const& rhs) | |
37 | { return std::tie(lhs.i, lhs.s) == std::tie(rhs.i, rhs.s); } | |
38 | ||
39 | bool | |
40 | operator<(value_type const& lhs, value_type const& rhs) | |
41 | { return std::tie(lhs.i, lhs.s) < std::tie(rhs.i, rhs.s); } | |
42 | ||
43 | } // namespace ns | |
44 | ||
45 | int main() | |
46 | { | |
47 | using ns::value_type; | |
48 | using O = std::optional<value_type>; | |
49 | using std::nullopt; | |
50 | ||
51 | { | |
52 | O o; | |
53 | VERIFY( o == nullopt ); | |
54 | VERIFY( nullopt == o ); | |
55 | VERIFY( !(o != nullopt) ); | |
56 | VERIFY( !(nullopt != o) ); | |
57 | } | |
58 | ||
59 | { | |
60 | O o { std::in_place }; | |
61 | VERIFY( !(o == nullopt) ); | |
62 | VERIFY( !(nullopt == o) ); | |
63 | VERIFY( o != nullopt ); | |
64 | VERIFY( nullopt != o ); | |
65 | } | |
66 | } |