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Expression.cpp

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00001 // Expression.cpp: implementation of the CExpression class.
00002 /*
00003  * Copyright (c) 1996-2000 Erwin Coumans <coockie@acm.org>

00004  *
00005  * Permission to use, copy, modify, distribute and sell this software

00006  * and its documentation for any purpose is hereby granted without fee,

00007  * provided that the above copyright notice appear in all copies and

00008  * that both that copyright notice and this permission notice appear

00009  * in supporting documentation.  Erwin Coumans makes no

00010  * representations about the suitability of this software for any

00011  * purpose.  It is provided "as is" without express or implied warranty.

00012  *
00013  */
00014 
00015 
00016 
00017 #include "Expression.h"
00018 #include "ErrorValue.h"
00019 //#include "FactoryManager.h"
00020 
00022 // Construction/Destruction
00024 
00025 CExpression::CExpression()// : m_cached_calculate(NULL)
00026 {
00027         m_refcount = 1;
00028 #ifdef _DEBUG
00029         //gRefCountExpr++;
00030 #endif
00031 }
00032 
00033 CExpression::~CExpression()

00034 {
00035         assert (m_refcount == 0);
00036 }
00037 
00038 
00039 
00040 // destuctor for CBrokenLinkInfo
00041 CBrokenLinkInfo::~CBrokenLinkInfo()

00042 {
00043         if (m_pExpr && !m_bRestored)
00044                 m_pExpr->Release();
00045 }
00046 
00047 
00048 void CBrokenLinkInfo::RestoreLink()

00049 {
00050 
00051         
00052         assertd(m_pExpr);
00053 
00054         if (m_pExpr)
00055         {
00056                 if (!m_bRestored){
00057                         m_bRestored=true;
00058                         
00059                 }
00060                 if (*m_pmemExpr)
00061                 {
00062                         (*m_pmemExpr)->Release();
00063                 }
00064                 *m_pmemExpr = m_pExpr;
00065                 
00066 //              m_pExpr=NULL;
00067         }
00068 }
00069 
00070 void CBrokenLinkInfo::BreakLink()

00071 {
00072         m_bRestored=false;
00073         m_pExpr->AddRef();
00074 }
00075 

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