public override object Clone()
{
return(new IsNull((val)_operand.Clone()));
}
public override object Clone()
{
return(new InExp((val)_lOperand.Clone(), (IElement[])_operands.Clone()));
}
public override object Clone()
{
return(new Between((val)_operand.Clone()
, (IElement)_fromOperand.Clone()
, (IElement)_toOperand.Clone()));
}