X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fearly-type.lisp;h=16404c784033a9fea27cea935da95667b7315b80;hb=0b96758f3645dff3e681d82cc97ddab1faae27ac;hp=56aac8c3691dcd7559e3d95baa2359e6ec653be7;hpb=d3c56c291d4d4eff8c3ec234d5ed904fe5b55df4;p=sbcl.git

diff --git a/src/code/early-type.lisp b/src/code/early-type.lisp
index 56aac8c..16404c7 100644
--- a/src/code/early-type.lisp
+++ b/src/code/early-type.lisp
@@ -11,10 +11,6 @@
 
 (!begin-collecting-cold-init-forms)
 
-;;; Has the type system been properly initialized? (I.e. is it OK to
-;;; use it?)
-(defvar *type-system-initialized* #+sb-xc-host nil) ; (set in cold load)
-
 ;;;; representations of types
 
 ;;; A HAIRY-TYPE represents anything too weird to be described
@@ -334,6 +330,34 @@
 		     :high high
 		     :enumerable enumerable))
 
+(defstruct (character-set-type
+            (:include ctype
+                      (class-info (type-class-or-lose 'character-set)))
+            (:constructor %make-character-set-type)
+            (:copier nil))
+  (pairs (missing-arg) :type list :read-only t))
+(defun make-character-set-type (&key pairs)
+  (aver (equal (mapcar #'car pairs)
+              (sort (mapcar #'car pairs) #'<)))
+  (let ((pairs (let (result)
+                (do ((pairs pairs (cdr pairs)))
+                    ((null pairs) (nreverse result))
+                  (destructuring-bind (low . high) (car pairs)
+                    (loop for (low1 . high1) in (cdr pairs)
+                          if (<= low1 (1+ high))
+                          do (progn (setf high (max high high1))
+                                    (setf pairs (cdr pairs)))
+                          else do (return nil))
+                    (cond
+                      ((>= low sb!xc:char-code-limit))
+                      ((< high 0))
+                      (t (push (cons (max 0 low)
+                                     (min high (1- sb!xc:char-code-limit)))
+                               result))))))))
+    (if (null pairs)
+       *empty-type*
+       (%make-character-set-type :pairs pairs))))
+
 ;;; An ARRAY-TYPE is used to represent any array type, including
 ;;; things such as SIMPLE-BASE-STRING.
 (defstruct (array-type (:include ctype
@@ -460,6 +484,24 @@
 	  (eq cdr-type *empty-type*))
       *empty-type*
       (%make-cons-type car-type cdr-type)))
+
+(defun cons-type-length-info (type)
+  (declare (type cons-type type))
+  (do ((min 1 (1+ min))
+       (cdr (cons-type-cdr-type type) (cons-type-cdr-type cdr)))
+      ((not (cons-type-p cdr))
+       (cond
+	 ((csubtypep cdr (specifier-type 'null))
+	  (values min t))
+	 ((csubtypep *universal-type* cdr)
+	  (values min nil))
+	 ((type/= (type-intersection (specifier-type 'cons) cdr) *empty-type*)
+	  (values min nil))
+	 ((type/= (type-intersection (specifier-type 'null) cdr) *empty-type*)
+	  (values min t))
+	 (t (values min :maybe))))
+    ()))
+       
 
 ;;;; type utilities