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435e56fb | 1 | // { dg-options "-std=gnu++17" } |
6458742a | 2 | // { dg-do run { target c++17 } } |
435e56fb | 3 | |
8d9254fc | 4 | // Copyright (C) 2013-2020 Free Software Foundation, Inc. |
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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 | ||
23 | struct value_type | |
24 | { | |
25 | int i; | |
26 | }; | |
27 | ||
28 | int main() | |
29 | { | |
30 | constexpr std::optional<value_type> o { value_type { 51 } }; | |
31 | static_assert( o.value().i == 51, "" ); | |
32 | static_assert( o.value().i == (*o).i, "" ); | |
33 | static_assert( &o.value().i == &(*o).i, "" ); | |
34 | } |