SCL Reference: Types

SCL allows the definition of types which can then be subsequently used to define variables . There are several kinds of type definitions.


Enumeration type definitions give specific values that the type allows:

type color is (red, blue, green);


Range definitions give a range of values that the type allows:

type Byte is range 0 to #16#FF#;

Range definitions can include an option definition of the units associated with the type:

type voltage is range -9223372036854775807 to 9223372036854775807
   units mV;
      V  = 1000 mV;
      kV = 1000 V;
   end units;


Below is an example of an array type:

type bit_vector is array (integer range <>) of bit;
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