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1 | // { dg-do compile { target c++17 } } | |
2 | ||
3 | // Copyright (C) 2014-2024 Free Software Foundation, Inc. | |
4 | // | |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
9 | // any later version. | |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING3. If not see | |
18 | // <http://www.gnu.org/licenses/>. | |
19 | ||
20 | #include <optional> | |
21 | #include <type_traits> | |
22 | #include <stdexcept> | |
23 | ||
24 | template<typename T> | |
25 | using check1_t = std::optional<T>; | |
26 | ||
27 | using check2_t = std::in_place_t; | |
28 | using check3_t = std::nullopt_t; | |
29 | using check4_t = std::bad_optional_access; | |
30 | ||
31 | static_assert(!std::is_base_of<std::logic_error, check4_t>::value, | |
32 | "bad_optional_access must derive from exception"); | |
33 | static_assert(std::is_base_of<std::exception, check4_t>::value, | |
34 | "bad_optional_access must derive from exception"); |