RAPL 3 - Reference Guide. - Phoenix Goucher

28 Data Types and Variables
Enumerated Types
It is often convenient to refer to the values of a variable by name, rather than by
number. For example, when referring to the colour of a test-tube, we can define:
enum
red,
orange,
yellow,
green,
blue
end enum colour_type
This defines type colour_type as type int, and creates the special constants red,
orange, yellow, green and blue, which will have values 0, 1, 2, 3, and 4,
respectively. These constants can be used anywhere a numerical constant would
be appropriate.
This allows a particular value to be associated with an identifier in the list.
Syntax
enum
item_list
end enum enum_identifier
where
enum and end enum are required,
enum_identifier is the name of the enum,
and
item_list is a comma-separated list of items, where each item can be a simple
identifier
identifier
or a statement
identifier = constant_expression
Examples
Example Description
enum
num_a,
num_b,
num_c
end enum x
enum
bit_0 = 1,
bit_1 = 2,
bit_3 = 4
end enum y
enum
x,
y,
z
end enum letters
x is an int
num_a is the constant 0
num_b is the constant 1
num_c is the constant 2
y is an int
bit_0 is the constant 1
bit_1 is the constant 2
bit_3 is the constant 4
This is illegal after the previous two declarations. The
constant identifiers must be unique within the same
scope.