ENUM

Specifies the number of bytes the compiler uses to represent enumerations. This becomes the default enumeration size for the object. A #pragma enum directive overrides this compile option.

ENUM Syntax:
 
|--+----------------------+-------------------------------------|
   |        .-*SMALL-.    |
   '-ENUM(--+-1------+--)-'
            +-2------+
            +-4------+
            '-*INT---'
 

*SMALL

Default setting. Use the smallest possible size for an enum, as appropriate to the given enum value.

1

Make all enum variables 1 byte in size, signed if possible

2

Make all enum variables 2 bytes in size, signed if possible

4

Make all enum variables 4 bytes in size, signed if possible

*INT

• Use the ANSI C Standard enum size ( 4-bytes signed).
• Use the ANSI C++ Standard enum size ( 4-bytes signed; unless the enumeration value > 2³¹-1).