slot-boundp-using-class class object slot-name => result
A class metaobject, the class of object.
A slot name.
The generic function
slot-boundp-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.
LispWorks User Guide and Reference Manual - 20 Sep 2017