Editing Object REXX (section)

=== Class and Method ===
The <code>::CLASS</code> [[Object REXX#Instructions|directive]] followed by a class name causes the interpreter to define a new class. After the class name, options such as <code>METACLASS</code>, <code>SUBCLASS</code>, <code>MIXINCLASS</code>, <code>ABSTRACT</code> and <code>INHERIT</code> can be set in order to use OOP features. The <code>::METHOD</code> directive can be used to define a new class method that is associated with the last <code>::CLASS</code> directive. The <code>::ATTRIBUTE</code> directive is used to define an [[Mutator method|accessor method]] that can retrieve or assign an object variable. Using the <code>EXPOSE</code> instruction, an object variable can be directly exposed to a method.<ref name=":2" /><syntaxhighlight lang="oorexx" style="background-color: #ffffff; !important" line="1">
d = .dog~new("Bella")           /* create and assign a dog  */
d~bark                          /* send bark message        */
say d~name                      /* output: Bella            */

::class dog                     /* class directive          */
::attribute name                /* attribute directive      */
::method init                   /* object initiation method */
  Expose name                   /* exposes name of dog      */
  use arg name                  /* assigns "Bella" to name  */
::method bark                   /* method directive         */
  Expose name
  say Name "goes woof!"         /* output: Bella goes woof! */
</syntaxhighlight>