built-in-class
,
class
,
standard-object
,
t
A built-in class is a class whose instances have
restricted capabilities or special representations.
Attempting to use
defclass
to define subclasses of a built-in class
signals an error of type error
.
Calling make-instance
to create an instance
of a built-in class signals an error of type error
.
Calling slot-value
on an instance of a built-in class
signals an error of type error
. Redefining a built-in class
or using change-class
to change the class of an instance
to or from a built-in class signals an error of type error
.
However, built-in classes can be used as parameter specializers
in methods.