Returns a new mixin subclass of the receiver class. You can use this
method to create a new mixin class that is a subclass of the superclass to
which you send the message. The classid
is a string that identifies the new mixin subclass. You can use the
id method
to retrieve this string.
The metaclass is a class object. If
you specify metaclass, the new subclass is
an instance of metaclass. (A metaclass is a
class that you can use to create a class, that is, a class
whose instances are classes. The Class class and its subclasses are metaclasses.)
If you do not specify a metaclass,
the new mixin subclass is an
instance of the default metaclass of the receiver class. For subclasses of
the Object class, the default metaclass is the Class class.
The methods is a collection whose
indexes are the names of methods
and whose items are method objects (or strings or arrays of strings containing
method code). If you specify methods, the new
class is enhanced with class methods from this collection. (The metaclass of
the new class is not affected.)
The metaClass
method returns the metaclass of a class.
The method search order of the new subclass is the same as that of the
receiver class, with the addition of the new subclass at the start of the
order.
Example 5.13. Class class — mixinClass method
buyable=.object~mixinClass("Buyable")/* New subclass is buyable *//* Superclass is Object class */
