/// <summary> Constructor for use when this is called when parsing a string
///
/// </summary>
/// <param name="sf">the built in function
/// </param>
/// <param name="ws">the workbook settings
/// </param>
public Attribute(StringFunction sf, WorkbookSettings ws)
{
settings = ws;
if (sf.getFunction(settings) == NExcel.Biff.Formula.Function.SUM)
{
options |= sumMask;
}
else if (sf.getFunction(settings) == NExcel.Biff.Formula.Function.IF)
{
options |= ifMask;
}
}