X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fearly-type.lisp;h=6f341915618401c20283ddb22f05d281fa746f3a;hb=7b384da95e6a30e1434523213aeeed3a90448c78;hp=3a9a2897a9da9c7008b43cec9296039774ac2b6f;hpb=9489abab7f981b8eea2aec8a883f2eb48d4cb138;p=sbcl.git

diff --git a/src/code/early-type.lisp b/src/code/early-type.lisp
index 3a9a289..6f34191 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
@@ -139,8 +135,6 @@
                      :rest rest
                      :allowp allowp))
 
-;;; FIXME: ANSI VALUES has a short form (without lambda list
-;;; keywords), which should be translated into a long one.
 (defun make-values-type (&key (args nil argsp)
                          required optional rest allowp)
   (if argsp
@@ -175,7 +169,14 @@
 ;;; (SPECIFIER-TYPE 'FUNCTION) and its subtypes
 (defstruct (fun-type (:include args-type
 			       (class-info (type-class-or-lose 'function)))
-                     (:constructor %make-fun-type))
+                     (:constructor
+                      %make-fun-type (&key required optional rest
+                                           keyp keywords allowp
+                                           wild-args
+                                           returns
+                                      &aux (rest (if (eq rest *empty-type*)
+                                                     nil
+                                                     rest)))))
   ;; true if the arguments are unrestrictive, i.e. *
   (wild-args nil :type boolean)
   ;; type describing the return values. This is a values type
@@ -330,7 +331,7 @@
 		     :enumerable enumerable))
 
 ;;; An ARRAY-TYPE is used to represent any array type, including
-;;; things such as SIMPLE-STRING.
+;;; things such as SIMPLE-BASE-STRING.
 (defstruct (array-type (:include ctype
 				 (class-info (type-class-or-lose 'array)))
                        (:constructor %make-array-type)
@@ -455,6 +456,24 @@
 	  (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
 
@@ -487,18 +506,16 @@
 		(or (built-in-classoid-translation spec) spec)
 		spec))
 	   (t
-	    (let* (;; FIXME: This automatic promotion of FOO-style
-		   ;; specs to (FOO)-style specs violates the ANSI
-		   ;; standard. Unfortunately, we can't fix the
-		   ;; problem just by removing it, since then things
-		   ;; downstream should break. But at some point we
-		   ;; should fix this and the things downstream too.
-		   (lspec (if (atom spec) (list spec) spec))
+	    (when (and (atom spec)
+		       (member spec '(and or not member eql satisfies values)))
+	      (error "The symbol ~S is not valid as a type specifier." spec))
+	    (let* ((lspec (if (atom spec) (list spec) spec))
 		   (fun (info :type :translator (car lspec))))
 	      (cond (fun
 		     (funcall fun lspec))
-		    ((or (and (consp spec) (symbolp (car spec)))
-			 (symbolp spec))
+		    ((or (and (consp spec) (symbolp (car spec))
+			      (not (info :type :builtin (car spec))))
+			 (and (symbolp spec) (not (info :type :builtin spec))))
 		     (when (and *type-system-initialized*
                                 (not (eq (info :type :kind spec)
                                          :forthcoming-defclass-type)))
@@ -532,7 +549,7 @@
   (let ((def (cond ((symbolp form)
                     (info :type :expander form))
                    ((and (consp form) (symbolp (car form)))
-                    (info :type :expander (car form)))
+		    (info :type :expander (car form)))
                    (t nil))))
     (if def
         (type-expand (funcall def (if (consp form) form (list form))))