(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)
(sb!xc:deftype extended-char ()
#!+sb-doc
- "Type of characters that aren't base-char's. None in CMU CL."
+ "Type of CHARACTERs that aren't BASE-CHARs."
'(and character (not base-char)))
(sb!xc:deftype standard-char ()
`(simple-array base-char (,size)))
(sb!xc:deftype string (&optional size)
`(or (array character (,size))
- (base-string ,size)))
+ (array nil (,size))
+ (base-string ,size)))
(sb!xc:deftype simple-string (&optional size)
`(or (simple-array character (,size))
- (simple-base-string ,size)))
+ (simple-array nil (,size))
+ (simple-base-string ,size)))
(sb!xc:deftype bit-vector (&optional size)
`(array bit (,size)))
(sb!xc:deftype simple-bit-vector (&optional size)
`(simple-array bit (,size)))
\f
-;;;; some private types that we use in defining the standard functions
+;;;; some private types that we use in defining the standard functions,
+;;;; or implementing declarations in standard compiler transforms
+
+;;; semistandard types
+(sb!xc:deftype generalized-boolean () t)
+
+(sb!xc:deftype format-control ()
+ '(or string function))
-;;; a type specifier
-(sb!xc:deftype type-specifier () '(or list symbol sb!xc:class))
+(sb!xc:deftype restart-designator ()
+ '(or (and symbol (not null)) restart))
;;; array rank, total size...
(sb!xc:deftype array-rank () `(integer 0 (,sb!xc:array-rank-limit)))
;;; something legal in an evaluated context
;;; FIXME: could probably go away
-(sb!xc:deftype form () 't)
+(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))
;;; legal args to pathname functions
(sb!xc:deftype pathname-designator ()
- '(or string pathname stream))
+ '(or string pathname #+sb-xc-host stream #-sb-xc-host file-stream))
(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 ()
;;; the :END arg to a sequence
(sb!xc:deftype sequence-end () '(or null index))
+;;; the :COUNT arg to a sequence
+(sb!xc:deftype sequence-count ()
+ `(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)
+(sb!xc:deftype lexenv-designator () '(or lexenv null))
;;; a thing that can be passed to FUNCALL & friends
;;;