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// ConstExpr.cpp: implementation of the CConstExpr 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 "Value.h" // for precompiled header
#include "ConstExpr.h"
#include "VectorValue.h"
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CConstExpr::CConstExpr()
{
}
CConstExpr::CConstExpr(CValue* constval)
/*
pre:
effect: constructs a CConstExpr cointing the value constval
*/
{
m_value = constval;
// m_bModified=true;
}
CConstExpr::~CConstExpr()
/*
pre:
effect: deletes the object
*/
{
if (m_value)
m_value->Release();
}
unsigned char CConstExpr::GetExpressionID()
{
return CCONSTEXPRESSIONID;
}
CValue* CConstExpr::Calculate()
/*
pre:
ret: a new object containing the value of the stored CValue
*/
{
return m_value->AddRef();
}
void CConstExpr::ClearModified()
{
if (m_value)
{
m_value->SetModified(false);
m_value->SetAffected(false);
}
}
double CConstExpr::GetNumber()
{
return -1;
}
bool CConstExpr::NeedsRecalculated()
{
return m_value->IsAffected(); // IsAffected is m_bModified OR m_bAffected !!!
}
CExpression* CConstExpr::CheckLink(std::vector<CBrokenLinkInfo*>& brokenlinks)
{
// parent checks if child is still usefull.
// When for example it's value it's deleted flag set
// then release Value, and return NULL in case of constexpression
// else return this...
assertd(m_value);
if (m_value->IsReleaseRequested())
{
AddRef(); //numchanges++;
return Release();
}
else
return this;
}
void CConstExpr::BroadcastOperators(VALUE_OPERATOR op)
{
assertd(m_value);
m_value->SetColorOperator(op);
}
bool CConstExpr::MergeExpression(CExpression *otherexpr)
{
assertd(false);
return false;
}
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