X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fpred.lisp;h=ee5c9e8b23919d1ff316ae10745b69017400611b;hb=b9519773faa7b3c98915eccb9cb1fd8a8270ee56;hp=27158cfbc17f1e18582bd6d66440411e0090e0cc;hpb=23c0c48f562d7dc5d1615bf13cb831b46c91d106;p=sbcl.git

diff --git a/src/code/pred.lisp b/src/code/pred.lisp
index 27158cf..ee5c9e8 100644
--- a/src/code/pred.lisp
+++ b/src/code/pred.lisp
@@ -23,6 +23,38 @@
       (and (complex-vector-p x)
            (do ((data (%array-data-vector x) (%array-data-vector data)))
                ((not (array-header-p data)) (simple-vector-p data))))))
+
+;;; Is X an extended sequence?
+(defun extended-sequence-p (x)
+  (and (not (listp x))
+       (not (vectorp x))
+       (let* ((slayout #.(info :type :compiler-layout 'sequence))
+             (depthoid #.(layout-depthoid (info :type :compiler-layout 'sequence)))
+             (layout (layout-of x)))
+        (when (layout-invalid layout)
+          (setq layout (update-object-layout-or-invalid x slayout)))
+        (if (eq layout slayout)
+            t
+            (let ((inherits (layout-inherits layout)))
+              (declare (optimize (safety 0)))
+              (and (> (length inherits) depthoid)
+                   (eq (svref inherits depthoid) slayout)))))))
+
+;;; Is X a SEQUENCE?  Harder than just (OR VECTOR LIST)
+(defun sequencep (x)
+  (or (listp x)
+      (vectorp x)
+      (let* ((slayout #.(info :type :compiler-layout 'sequence))
+             (depthoid #.(layout-depthoid (info :type :compiler-layout 'sequence)))
+             (layout (layout-of x)))
+        (when (layout-invalid layout)
+          (setq layout (update-object-layout-or-invalid x slayout)))
+        (if (eq layout slayout)
+            t
+            (let ((inherits (layout-inherits layout)))
+              (declare (optimize (safety 0)))
+              (and (> (length inherits) depthoid)
+                   (eq (svref inherits depthoid) slayout)))))))
 
 ;;;; primitive predicates. These must be supported directly by the
 ;;;; compiler.
@@ -285,18 +317,21 @@ length and have identical components. Other arrays must be EQ to be EQUAL."
               (hash-table-equalp x y)))
         ((%instancep x)
          (let* ((layout-x (%instance-layout x))
-                (len (layout-length layout-x)))
+                (raw-len (layout-n-untagged-slots layout-x))
+                (total-len (layout-length layout-x))
+                (normal-len (- total-len raw-len)))
            (and (%instancep y)
                 (eq layout-x (%instance-layout y))
                 (structure-classoid-p (layout-classoid layout-x))
-                (do ((i 1 (1+ i)))
-                    ((= i len) t)
-                  (declare (fixnum i))
+                (dotimes (i normal-len t)
                   (let ((x-el (%instance-ref x i))
                         (y-el (%instance-ref y i)))
                     (unless (or (eq x-el y-el)
                                 (equalp x-el y-el))
-                      (return nil)))))))
+                      (return nil))))
+                (if (zerop raw-len)
+                    t
+                    (raw-instance-slots-equalp layout-x x y)))))
         ((vectorp x)
          (let ((length (length x)))
            (and (vectorp y)