Expression.cpp

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// Expression.cpp: implementation of the CExpression class.
/*
 * Copyright (c) 1996-2000 Erwin Coumans <coockie@acm.org>
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Erwin Coumans makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 */

#include "Expression.h"
#include "ErrorValue.h"

// Construction/Destruction
#ifdef _DEBUG
//int gRefCountExpr;
#endif
CExpression::CExpression()// : m_cached_calculate(NULL)
{
        m_refcount = 1;
#ifdef _DEBUG
        //gRefCountExpr++;
#endif
}

CExpression::~CExpression()
{
        assert (m_refcount == 0);
}



// destuctor for CBrokenLinkInfo
CBrokenLinkInfo::~CBrokenLinkInfo()
{
        if (m_pExpr && !m_bRestored)
                m_pExpr->Release();
}


void CBrokenLinkInfo::RestoreLink()
{

        
        assertd(m_pExpr);

        if (m_pExpr)
        {
                if (!m_bRestored){
                        m_bRestored=true;
                        
                }
                if (*m_pmemExpr)
                {
                        (*m_pmemExpr)->Release();
                }
                *m_pmemExpr = m_pExpr;
                
//              m_pExpr=NULL;
        }
}

void CBrokenLinkInfo::BreakLink()
{
        m_bRestored=false;
        m_pExpr->AddRef();
}