-;;; a utility for SIGNAL, ERROR, CERROR, WARN, and INVOKE-DEBUGGER:
-;;; Parse the hairy argument conventions into a single argument that's
-;;; directly usable by all the other routines.
-(defun coerce-to-condition (datum arguments default-type fun-name)
- (cond ((typep datum 'condition)
- (if arguments
- (cerror "Ignore the additional arguments."
- 'simple-type-error
- :datum arguments
- :expected-type 'null
- :format-control "You may not supply additional arguments ~
- when giving ~S to ~S."
- :format-arguments (list datum fun-name)))
- datum)
- ((symbolp datum) ; roughly, (SUBTYPEP DATUM 'CONDITION)
- (apply #'make-condition datum arguments))
- ((or (stringp datum) (functionp datum))
- (make-condition default-type
- :format-control datum
- :format-arguments arguments))
- (t
- (error 'simple-type-error
- :datum datum
- :expected-type '(or symbol string)
- :format-control "bad argument to ~S: ~S"
- :format-arguments (list fun-name datum)))))
-