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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/optional.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 an optional object.

void test_streaming_out_optional()

{

boost::optional<int> opt;

std::cout << opt;

}