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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/20_util/optional/constexpr/observers/2.cc
1 // { dg-options "-std=gnu++17" }
2 // { dg-do run { target c++17 } }
4 // Copyright (C) 2013-2020 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/>.
27 void* operator&() { return nullptr; } // N.B. non-const
32 constexpr std::optional
<value_type
> o
{ value_type
{ 51 } };
33 static_assert( o
->i
== 51, "" );
34 static_assert( o
->i
== (*o
).i
, "" );
35 static_assert( &o
->i
== &(*o
).i
, "" );