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// Copyright (C) 2014 Andrzej Krzemienski.

//

// Use, modification, and distribution is subject to the Boost Software

// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at

// http://www.boost.org/LICENSE_1_0.txt)

//

// See http://www.boost.org/lib/optional for documentation.

//

// You are welcome to contact the author at:

// akrzemi1@gmail.com

#include "boost/optional/optional.hpp"

#ifdef __BORLANDC__

#pragma hdrstop

#endif

#include "boost/core/lightweight_test.hpp"

#include "boost/none.hpp"

struct SemiRegular // no operator==

{

private: void operator==(SemiRegular const&) const {}

private: void operator!=(SemiRegular const&) const {}

};

void test_equal_to_none_of_noncomparable_T()

{

boost::optional<SemiRegular> i = SemiRegular();

boost::optional<SemiRegular> o;

BOOST_TEST(i != boost::none);

BOOST_TEST(boost::none != i);

BOOST_TEST(o == boost::none);

BOOST_TEST(boost::none == o);

}

int main()

{

test_equal_to_none_of_noncomparable_T();

return boost::report_errors();

}