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  ◄Ordinal Types► ◄Contents► ◄Index►                              ◄Back►
 
  ( <identifier> [, <identifier>, ...] )
 
  Description
 
    Enumerated data types define a group of one or more related
    elements. The compiler treats the elements as an ordinal
    type──that is, it assigns successive integral values to each
    element. (Integral values are evenly divisible by one.) The first
    element is assigned 0. QuickPascal allows 65536 elements in one
    enumerated type.
 
    The following example──part of a simulation of an 8086
    microprocessor──illustrates one possible use of enumerated types:
 
       TYPE
           hardware_interrupts = ( divide_by_zero, single_step,
                                   nonmaskable, breakpoint, overflow );
       VAR
         hardware_interrupt : hardware_interrupts;
       .
       .
       CASE hardware_interrupt OF
           divide_by_zero : recover( hardware_interrupt );
           single_step    : debug( hardware_interrupt );
           nonmaskable    : recover( hardware_interrupt );
           breakpoint     : debug( hardware_interrupt );
           overflow       : recover( hardware_interrupt );
           ELSE error
           END;
 
    Elements of an enumerated type can be tested for equality (=, <=,
    or >=) and order (Ord, Pred, Succ).