closure_context.hpp

C++的一个好库。。。现在很流行

/*=============================================================================
    Copyright (c) 2002-2003 Joel de Guzman
    Copyright (c) 2002-2003 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_CLOSURE_CONTEXT_HPP)
#define BOOST_SPIRIT_CLOSURE_CONTEXT_HPP

///////////////////////////////////////////////////////////////////////////////
namespace boost { namespace spirit {

#if !defined(BOOST_SPIRIT_CLOSURE_CONTEXT_LINKER_DEFINED)
#define BOOST_SPIRIT_CLOSURE_CONTEXT_LINKER_DEFINED

///////////////////////////////////////////////////////////////////////////////
//
//  closure_context_linker
//  { helper template for the closure extendability }
//
//      This classes can be 'overloaded' (defined elsewhere), to plug
//      in additional functionality into the closure parsing process.
//
///////////////////////////////////////////////////////////////////////////////

template<typename ContextT>
struct closure_context_linker : public ContextT
{
    template <typename ParserT>
    closure_context_linker(ParserT const& p)
    : ContextT(p) {}

    template <typename ParserT, typename ScannerT>
    void pre_parse(ParserT const& p, ScannerT const& scan)
    { ContextT::pre_parse(p, scan); }

    template <typename ResultT, typename ParserT, typename ScannerT>
    ResultT&
    post_parse(ResultT& hit, ParserT const& p, ScannerT const& scan)
    { return ContextT::post_parse(hit, p, scan); }
};

#endif // !defined(BOOST_SPIRIT_CLOSURE_CONTEXT_LINKER_DEFINED)

///////////////////////////////////////////////////////////////////////////////
}} // namespace boost::spirit

#endif // BOOST_SPIRIT_CLOSURE_CONTEXT_HPP