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// { dg-do run { target c++14 } }
// Copyright (C) 2013-2018 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 copy 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>;
{
O o, p;
VERIFY( o == p );
VERIFY( !(o != p) );
}
{
O o { value_type { 42, "forty-two" } }, p;
VERIFY( !(o == p) );
VERIFY( o != p );
}
{
O o, p { value_type { 42, "forty-two" } };
VERIFY( !(o == p) );
VERIFY( o != p );
}
{
O o { value_type { 11, "eleventy" } }, p { value_type { 42, "forty-two" } };
VERIFY( !(o == p) );
VERIFY( o != p );
}
{
O o { value_type { 42, "forty-two" } }, p { value_type { 11, "eleventy" } };
VERIFY( !(o == p) );
VERIFY( o != p );
}
{
O o { value_type { 42, "forty-two" } }, p { value_type { 42, "forty-two" } };
VERIFY( o == p );
VERIFY( !(o != p) );
}
}
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