X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fdeftypes-for-target.lisp;h=50057757991a76f1555cb9f5f07dd84e4c3acff3;hb=15e14ef1ccd3ab6f4711632435a40493dc4cdd9d;hp=0928858c8100d3485579523ed01653fa505f4ee1;hpb=403bacffd903f8c5787a182f4133cffc69b55dc0;p=sbcl.git

diff --git a/src/code/deftypes-for-target.lisp b/src/code/deftypes-for-target.lisp
index 0928858..5005775 100644
--- a/src/code/deftypes-for-target.lisp
+++ b/src/code/deftypes-for-target.lisp
@@ -33,7 +33,7 @@
 
 (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
@@ -46,6 +46,14 @@
 	(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)
@@ -121,9 +129,7 @@
 ;;; 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))
@@ -134,6 +140,10 @@
 (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 ()
@@ -153,10 +163,7 @@
   `(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)