slot-value-using-class class object slot-name => value
(setf slot-value-using-class) value class object slot-name => value
The generic function slot-value-using-class implements the behavior of the
slot-value
function.
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.
Note: by default, standard slot accessors are optimized to not call slot-value-using-class. This can be overidden with the
:optimize-slot-access
class option. See defclass for details.