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- /*=============================================================================
- Copyright (c) 1998-2003 Joel de Guzman
- Copyright (c) 2001 Daniel Nuffer
- Copyright (c) 2002 Hartmut Kaiser
- http://spirit.sourceforge.net/
- 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)
- =============================================================================*/
- #if !defined(BOOST_SPIRIT_OPTIONAL_IPP)
- #define BOOST_SPIRIT_OPTIONAL_IPP
- namespace boost { namespace spirit {
- BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
- ///////////////////////////////////////////////////////////////////////////
- //
- // optional class implementation
- //
- ///////////////////////////////////////////////////////////////////////////
- template <typename S>
- optional<S>
- operator!(parser<S> const& a)
- {
- return optional<S>(a.derived());
- }
- BOOST_SPIRIT_CLASSIC_NAMESPACE_END
- }} // namespace boost::spirit
- #endif
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