xst_storage_adaptor.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_storage_adaptor.h

#ifndef _XST_STORAGE_ADAPTOR_H_INCLUDED_
#define _XST_STORAGE_ADAPTOR_H_INCLUDED_

namespace cttl_impl {

template< typename ValueT >
class xst_storage_adaptor
{
private:
    ValueT m_value;

public:
    typedef ValueT value_type;

    typedef ValueT& reference;

    typedef ValueT const& const_reference;

    xst_storage_adaptor()
        :
    m_value( ValueT() )
    {
    }

    xst_storage_adaptor( ValueT const& value_ )
        :
    m_value( value_ )
    {
    }

    xst_storage_adaptor( xst_storage_adaptor< ValueT > const& other_ )
    :
    m_value( other_.m_value )
    {
    }

    void operator=( xst_storage_adaptor< ValueT > const& ) const
    {
    }

    const_reference const_value() const
    {
        return m_value;
    }

    reference value()
    {
        return m_value;
    }

    static char trace_char()
    {
        return '_';
    }

}; // class xst_storage_adaptor


template< typename ValueT >
class xst_storage_adaptor< ValueT& >
{
private:
    ValueT& m_value;

public:
    typedef ValueT value_type;

    typedef ValueT& reference;

    typedef ValueT const& const_reference;

    xst_storage_adaptor( ValueT& value_ )
        :
    m_value( value_ )
    {
    }

    void operator=( xst_storage_adaptor< ValueT& > const& ) const
    {
    }

    const_reference const_value() const
    {
        return m_value;
    }

    reference value() const
    {
        return m_value;
    }

    static char trace_char()
    {
        return ' ';
    }

}; // class xst_storage_adaptor


template< typename ValueT >
class xst_storage_adaptor< ValueT const& >
{
private:
    ValueT const& m_value;

public:
    typedef ValueT value_type;

    typedef ValueT& reference;

    typedef ValueT const& const_reference;

    xst_storage_adaptor( ValueT const& value_ )
        :
    m_value( value_ )
    {
    }

    void operator=( xst_storage_adaptor< ValueT const& > const& ) const
    {
    }

    const_reference const_value() const
    {
        return m_value;
    }

    const_reference value() const
    {
        return m_value;
    }

    static char trace_char()
    {
        return '&';
    }

}; // class xst_storage_adaptor


}   // namespace cttl_impl

#endif // _XST_STORAGE_ADAPTOR_H_INCLUDED_

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