| // 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; |
| } |
