xst_edge_translator.h

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// Common Text Transformation Library
// Copyright (C) 1997-2006 by Igor Kholodov. 
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the
// Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// mailto:cttl@users.sourceforge.net
// http://sourceforge.net/projects/cttl/

// xst_edge_translator.h

#ifndef _XST_EDGE_TRANSLATOR_H_INCLUDED_
#define _XST_EDGE_TRANSLATOR_H_INCLUDED_

namespace cttl_impl {

template< typename PolicyT, typename StringT >
class xst_edge_translator
{
public:
    typedef typename StringT::value_type char_T;

private:
    cttl::const_edge< PolicyT, StringT > const& m_edge;

    StringT m_value;

public:
    xst_edge_translator( cttl::const_edge< PolicyT, StringT > const& edge_ )
        :
    m_edge( edge_ )
    {
    }

    xst_edge_translator( xst_edge_translator< PolicyT, StringT > const& other_ )
        :
    m_edge( other_.m_edge )
    {
    }

    void operator=( xst_edge_translator< PolicyT, StringT > const& ) const
    {
    }

    template< typename InputValueT >
    char_T const* operator() ( InputValueT const& )
    {
        trace_deposit();
        m_value = m_edge.text();
        return m_value.c_str();
    }

private:
    void trace_deposit()
    {
        CTTL_TRACE_DEPOSIT_TEXT( "edge(" );
        CTTL_TRACE_DEPOSIT_TEXT( m_edge.first.identity() );
        CTTL_TRACE_DEPOSIT_TEXT( ',' );
        CTTL_TRACE_DEPOSIT_TEXT( m_edge.second.identity() );
        CTTL_TRACE_DEPOSIT_TEXT( ")@" );
        CTTL_TRACE_DEPOSIT_TEXT( m_edge.first.offset() );
        CTTL_TRACE_DEPOSIT_TEXT( '-' );
        CTTL_TRACE_DEPOSIT_TEXT( m_edge.second.offset() );
        CTTL_TRACE_DEPOSIT_TEXT( " \"" );
        CTTL_TRACE_DEPOSIT_MONOSPACE_TEXT( m_edge.text().c_str() );
        CTTL_TRACE_DEPOSIT_TEXT( "\" " );
    }

}; // class xst_edge_translator

}   // namespace cttl_impl


#endif //_XST_EDGE_TRANSLATOR_H_INCLUDED_

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