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// { dg-options "-std=gnu++14" }
// { dg-do run }
// Copyright (C) 2013-2016 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a moved_to of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include <experimental/optional>
#include <testsuite_hooks.h>
#include <tuple>
#include <string>
namespace ns
{
struct value_type
{
int i;
std::string s;
};
bool
operator==(value_type const& lhs, value_type const& rhs)
{ return std::tie(lhs.i, lhs.s) == std::tie(rhs.i, rhs.s); }
bool
operator<(value_type const& lhs, value_type const& rhs)
{ return std::tie(lhs.i, lhs.s) < std::tie(rhs.i, rhs.s); }
} // namespace ns
int main()
{
using ns::value_type;
using O = std::experimental::optional<value_type>;
using std::experimental::nullopt;
{
O o;
VERIFY( o == nullopt );
VERIFY( nullopt == o );
VERIFY( !(o != nullopt) );
VERIFY( !(nullopt != o) );
}
{
O o { std::experimental::in_place };
VERIFY( !(o == nullopt) );
VERIFY( !(nullopt == o) );
VERIFY( o != nullopt );
VERIFY( nullopt != o );
}
}
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