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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/20_util/optional/typedefs.cc
1 // { dg-do compile { target c++17 } }
3 // Copyright (C) 2014-2021 Free Software Foundation, Inc.
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)
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.
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/>.
21 #include <type_traits>
25 using check1_t
= std::optional
<T
>;
27 using check2_t
= std::in_place_t
;
28 using check3_t
= std::nullopt_t
;
29 using check4_t
= std::bad_optional_access
;
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");