1 // { dg-do run { target c++14 } }
3 // Copyright (C) 2013-2018 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/>.
20 #include <experimental/optional>
21 #include <testsuite_hooks.h>
25 // [20.5.6] Disengaged state indicator
26 static_assert( std::is_same
<decltype(std::experimental::nullopt
), const std::experimental::nullopt_t
>(), "" );
27 static_assert( std::is_empty
<std::experimental::nullopt_t
>(), "" );
28 static_assert( std::is_literal_type
<std::experimental::nullopt_t
>(), "" );
29 static_assert( !std::is_default_constructible
<std::experimental::nullopt_t
>(), "" );
32 std::experimental::optional
<int> o
= std::experimental::nullopt
;
37 std::experimental::optional
<int> o
= { std::experimental::nullopt
};
42 std::experimental::optional
<int> o
{ std::experimental::nullopt
};