FUNCTION IfcValidCalendarDate

(* SCHEMA IFC2X3; *)

FUNCTION IfcValidCalendarDate
	(Date : IfcCalendarDate)
	: LOGICAL;
  IF NOT ({1 <= Date.DayComponent <= 31}) THEN    
    RETURN(FALSE);  
  END_IF;
  CASE Date.MonthComponent OF
    4         : RETURN({ 1<= Date.DayComponent <= 30});
    6         : RETURN({ 1<= Date.DayComponent <= 30});
    9         : RETURN({ 1<= Date.DayComponent <= 30});
    11        : RETURN({ 1<= Date.DayComponent <= 30});    
    2         :    
    BEGIN
      IF (IfcLeapYear(Date.YearComponent)) THEN
        RETURN({ 1<= Date.DayComponent <= 29});      
      ELSE
        RETURN({ 1<= Date.DayComponent <= 28});      
      END_IF;    
    END;
    OTHERWISE : RETURN(TRUE);  
  END_CASE;
END_FUNCTION;

Referenced By

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2012-03-27T17:21:14-04:00