anchor.diff:  !
   ! MODULE: datetime
   !
  -! VERSION: 1.0.0
  +! VERSION: 0.1.0
   !
   ! AUTHOR: Milan Curcic
   !         University of Miami
  
positive.code: 
  
  
  PURE ELEMENTAL FUNCTION datetime_minus_timedelta(d0,t) RESULT(d)
  !======================================================================>
  !
  
negative.code: 
  INTERFACE OPERATOR(+)
    MODULE PROCEDURE datetime_plus_timedelta
    MODULE PROCEDURE timedelta_plus_datetime
    MODULE PROCEDURE timedelta_plus_timedelta
  ENDINTERFACE
  
  