classic/attribute/closure_context.hpp

0001 /*=============================================================================
0002     Copyright (c) 2002-2003 Joel de Guzman
0003     Copyright (c) 2002-2003 Hartmut Kaiser
0004     http://spirit.sourceforge.net/
0005
0006   Distributed under the Boost Software License, Version 1.0. (See accompanying
0007   file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0008 =============================================================================*/
0009 #if !defined(BOOST_SPIRIT_CLOSURE_CONTEXT_HPP)
0010 #define BOOST_SPIRIT_CLOSURE_CONTEXT_HPP
0011
0012 #include <boost/spirit/home/classic/namespace.hpp>
0013
0014 ///////////////////////////////////////////////////////////////////////////////
0015 namespace boost { namespace spirit {
0016
0017 BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
0018
0019 #if !defined(BOOST_SPIRIT_CLOSURE_CONTEXT_LINKER_DEFINED)
0020 #define BOOST_SPIRIT_CLOSURE_CONTEXT_LINKER_DEFINED
0021
0022 ///////////////////////////////////////////////////////////////////////////////
0023 //
0024 //  closure_context_linker
0025 //  { helper template for the closure extendability }
0026 //
0027 //      This classes can be 'overloaded' (defined elsewhere), to plug
0028 //      in additional functionality into the closure parsing process.
0029 //
0030 ///////////////////////////////////////////////////////////////////////////////
0031
0032 template<typename ContextT>
0033 struct closure_context_linker : public ContextT
0034 {
0035     template <typename ParserT>
0036     closure_context_linker(ParserT const& p)
0037     : ContextT(p) {}
0038
0039     template <typename ParserT, typename ScannerT>
0040     void pre_parse(ParserT const& p, ScannerT const& scan)
0041     { ContextT::pre_parse(p, scan); }
0042
0043     template <typename ResultT, typename ParserT, typename ScannerT>
0044     ResultT&
0045     post_parse(ResultT& hit, ParserT const& p, ScannerT const& scan)
0046     { return ContextT::post_parse(hit, p, scan); }
0047 };
0048
0049 #endif // !defined(BOOST_SPIRIT_CLOSURE_CONTEXT_LINKER_DEFINED)
0050
0051 ///////////////////////////////////////////////////////////////////////////////
0052 BOOST_SPIRIT_CLASSIC_NAMESPACE_END
0053
0054 }} // namespace BOOST_SPIRIT_CLASSIC_NS
0055
0056 #endif // BOOST_SPIRIT_CLOSURE_CONTEXT_HPP