(sb!xc:deftype signed-byte (&optional s)
(cond ((eq s '*) 'integer)
- ((and (integerp s) (> s 1))
+ ((and (integerp s) (> s 0))
(let ((bound (ash 1 (1- s))))
`(integer ,(- bound) ,(1- bound))))
(t
(t
(error "bad size specified for UNSIGNED-BYTE type specifier: ~S" s))))
+;;; ANSI got UNSIGNED-BYTE wrong, prohibiting (UNSIGNED-BYTE 0).
+;;; Since this is actually a substantial impediment to clarity...
+(sb!xc:deftype unsigned-byte* (&optional s)
+ (cond
+ ((eq s '*) '(integer 0))
+ ((zerop s) '(integer 0 0))
+ (t `(unsigned-byte ,s))))
+
(sb!xc:deftype bit () '(integer 0 1))
(sb!xc:deftype compiled-function () 'function)
;;; FIXME: could probably go away
(sb!xc:deftype form () t)
-;;; Maclisp compatibility...
-;;; FIXME: should be STRING-DESIGNATOR (the term used in the ANSI spec)
-(sb!xc:deftype stringable () '(or string symbol character))
+(sb!xc:deftype string-designator () '(or string symbol character))
;;; a thing legal in places where we want the name of a file
(sb!xc:deftype filename () '(or string pathname))
(sb!xc:deftype logical-host-designator ()
'(or host string))
+(sb!xc:deftype package-designator () '(or string-designator sb!xc:package))
+;;; a designator for a list of symbols
+(sb!xc:deftype symbols-designator () '(or list symbol))
+
;;; a thing returned by the irrational functions. We assume that they
;;; never compute a rational result.
(sb!xc:deftype irrational ()
`(or null integer))
;;; a valid argument to a stream function
-;;;
-;;; FIXME: should probably be STREAM-DESIGNATOR, after the term
-;;; used in the ANSI spec (if this is in fact exactly the same thing)
-(sb!xc:deftype streamlike () '(or stream (member nil t)))
+(sb!xc:deftype stream-designator () '(or stream (member nil t)))
;;; an object suitable for input to standard functions that accept
;;; "environment objects" (of the ANSI glossary)