//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, SH Software Co. Ltd.
// = FileName	:   WPushVar.h
// = Version	:   ver2.0
// = Author		:   zjq
// = CreateDate	:   2002-09-09
// = Description:   类的声明
// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+
#ifndef _WPUSHVAR_H_
#define _WPUSHVAR_H_

//临时控制变量
template<class T> class WPushVar
{
public:
	
	virtual ~WPushVar();

	WPushVar(T&variable,const T&newData);
	
	const T& GetOldData()const;

protected:
	const T oldData;
	T &var;
};

template<class T> 
WPushVar<T>::WPushVar(T&variable,const T&newData)
: oldData(variable),var(variable)
{
	var = newData;
}

template<class T> 
WPushVar<T>::~WPushVar()
{
	var = oldData;
}

template<class T> 
const T& WPushVar<T>::GetOldData()const
{
	return oldData;
}

#endif