[/
    Boost.Optional

    Copyright (c) 2003-2007 Fernando Luis Cacciola Carballal
    Copyright (c) 2015 Andrzej Krzemienski

    Distributed under 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)
]

[section Header <boost/optional/optional_fwd.hpp>]

[section Synopsis]
```
namespace boost {

template <class T> class optional ;

template <class T> void swap ( optional<T>& , optional<T>& );

template <class T> struct optional_swap_should_use_default_constructor ;
  
} // namespace boost
```

This header only contains declarations.

[endsect]


[endsect]