(t
(error "Unexpected condition designator datum ~S" datum))))
+(export 'simple-control-error)
+(define-condition simple-control-error (control-error simple-error)
+ ())
+
+(export 'invoke-associated-restart)
+(defun invoke-associated-restart (restart condition &rest arguments)
+ "Invoke the active RESTART associated with CONDITION, with the ARGUMENTS.
+
+ Find an active restart designated by RESTART; if CONDITION is not nil,
+ then restrict the search to restarts associated with CONDITION, and
+ restarts not associated with any condition. If no such restart is found
+ then signal an error of type `control-error'; otherwise invoke the restart
+ with the given ARGUMENTS."
+ (apply #'invoke-restart
+ (or (find-restart restart condition)
+ (error 'simple-control-error
+ :format-control "~:[Restart ~S is not active~;~
+ No active `~(~A~)' restart~]~
+ ~@[ for condition ~S~]"
+ :format-arguments (list (symbolp restart)
+ restart
+ condition)))
+ arguments))
+
;;;--------------------------------------------------------------------------
;;; CLOS hacking.