
(/VERSIONCHECK 2) 

(DEFUN |RETFROM-;retract;SA;1| (|s| $)
  (PROG (|u|)
    (RETURN
     (SEQ (LETT |u| (SPADCALL |s| (QREFELT $ 9)) |RETFROM-;retract;SA;1|)
          (EXIT
           (COND ((QEQCAR |u| 1) (|error| "not retractable"))
                 ('T (QCDR |u|)))))))) 

(DEFUN |RetractableFrom&| (|#1| |#2|)
  (PROG (|pv$| $ |dv$| DV$2 DV$1)
    (RETURN
     (PROGN
      (LETT DV$1 (|devaluate| |#1|) . #1=(|RetractableFrom&|))
      (LETT DV$2 (|devaluate| |#2|) . #1#)
      (LETT |dv$| (LIST '|RetractableFrom&| DV$1 DV$2) . #1#)
      (LETT $ (GETREFV 11) . #1#)
      (QSETREFV $ 0 |dv$|)
      (QSETREFV $ 3 (LETT |pv$| (|buildPredVector| 0 0 NIL) . #1#))
      (|stuffDomainSlots| $)
      (QSETREFV $ 6 |#1|)
      (QSETREFV $ 7 |#2|)
      (SETF |pv$| (QREFELT $ 3))
      $)))) 

(MAKEPROP '|RetractableFrom&| '|infovec|
          (LIST
           '#(NIL NIL NIL NIL NIL NIL (|local| |#1|) (|local| |#2|)
              (|Union| $ '"failed") (0 . |retractIfCan|)
              |RETFROM-;retract;SA;1|)
           '#(|retract| 5) 'NIL
           (CONS (|makeByteWordVec2| 1 'NIL)
                 (CONS '#()
                       (CONS '#()
                             (|makeByteWordVec2| 10 '(1 6 8 7 9 1 0 0 7 10)))))
           '|lookupComplete|)) 
