( defvar s ( make-struct :slot 0 ) ) ( struct-slot s ) => 0 ( defvar c ( make-instance 'my-class :slot 0 ) ) ( my-class-slot c ) ( slot-value c 'slot ) => 0 ( defclass my-class ( ) ( ( slot :initarg :slot :accessor my-class-slot ) ) ) ( setq c ( make-instance :slot 0 ) ) ( my-class-slot c ) => 0