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// Copyright (C) 2015, 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 <iostream>
#include "boost/none.hpp"
// but no boost/optional/optional_io.hpp
// THIS TEST SHOULD FAIL TO COMPILE
// Unless one includes header boost/optional/optional_io.hpp, it should not be possible
// to stream out boost::none.
void test_streaming_out_none()
  std::cout << boost::none;

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