| /*============================================================================= | |
| 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 |