MATLAB Object-Oriented Programming

Enumerations Derived from Built-In Types

In this section...

“Subclassing Built-In Types” on page 14-28

“Derive Enumeration Class from Numeric Type” on page 14-28

“How to Alias Enumeration Names” on page 14-30

“Superclass Constructor Returns Underlying Value” on page 14-31

“Default Converter” on page 14-32

Subclassing Built-In Types

Enumeration classes can subclass MATLAB built-in classes. Deriving an enumeration

class from a built-in classes is useful to extend the usefulness of the enumeration

members.

• Enumeration inherit functionality from the built-in class.


• You can associate a numeric or logical value with enumeration members.

For a more basic discussion of enumeration classes, see “Define Enumeration Classes” on

page 14-5.

Derive Enumeration Class from Numeric Type

NoteEnumeration classes derived from built-in numeric and logical classes cannot

define properties.

If an enumeration class subclasses a built-in numeric class, the subclass inherits ordering

and arithmetic operations that you can apply to the enumerated names.

For example, the Results class subclasses the int32 built-in class. This class associates

an integer value with each of the four enumeration members — First, Second, Third,

and NoPoints.

classdef Results < int32

enumeration

First (100)

14 Enumerations