slot-value-using-class class object slot-name => value
(setf slot-value-using-class) value class object slot-name => value
A class metaobject, the class of object.
A slot name.
The value of the slot named by slot-name.
The generic function slot-value-using-class implements the behavior of the
The implementation is as described in AMOP, except that the third argument is the slot name, and not a slot definition metaobject. The primary methods specialize on
t for this argument.
by default, standard slot accessors are optimized to not call slot-value-using-class. This can be overridden with the
:optimize-slot-access class option. See defclass for details.
LispWorks User Guide and Reference Manual - 20 Sep 2017