[/ 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.hpp>] This is an alias for header [link boost_optional.reference.header__boost_optional_optional_hpp_.header_optional_optional `<boost/optional/optional.hpp>`]. [endsect]