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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/experimental/optional/nullopt.cc
1 // { dg-options "-std=gnu++14" }
4 // Copyright (C) 2013-2014 Free Software Foundation, Inc.
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)
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.
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING3. If not see
19 // <http://www.gnu.org/licenses/>.
21 #include <experimental/optional>
22 #include <testsuite_hooks.h>
26 // [20.5.6] Disengaged state indicator
27 static_assert( std::is_same
<decltype(std::experimental::nullopt
), const std::experimental::nullopt_t
>(), "" );
28 static_assert( std::is_empty
<std::experimental::nullopt_t
>(), "" );
29 static_assert( std::is_literal_type
<std::experimental::nullopt_t
>(), "" );
30 static_assert( !std::is_default_constructible
<std::experimental::nullopt_t
>(), "" );
33 std::experimental::optional
<int> o
= std::experimental::nullopt
;
38 std::experimental::optional
<int> o
= { std::experimental::nullopt
};
43 std::experimental::optional
<int> o
{ std::experimental::nullopt
};