The generic functions implementing slot access are like those described in AMOP, except that each takes a slot-name argument rather than a slot definition object, and the primary methods are therefore specialized differently.
For details, see the
LispWorks Reference Manual
pages for
slot-boundp-using-class
,
slot-value-using-class
and
slot-makunbound-using-class
.
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 the second definittion of
virtual-metaclass
below for an example of the use of this.