0.8.16.10:

[sbcl.git] / src / compiler / typetran.lisp

diff --git a/src/compiler/typetran.lisp b/src/compiler/typetran.lisp
index 5503f87..c1b1908 100644 (file)
--- a/src/compiler/typetran.lisp
+++ b/src/compiler/typetran.lisp
@@ -292,6 +292,21 @@
                        `((typep (cdr ,n-obj)
                                 ',(type-specifier cdr-type))))))))))
  
+(defun source-transform-character-set-typep (object type)
+  (let ((pairs (character-set-type-pairs type)))
+    (if (and (= (length pairs) 1)
+            (= (caar pairs) 0)
+            (= (cdar pairs) (1- sb!xc:char-code-limit)))
+       `(characterp ,object)
+       (once-only ((n-obj object))
+         (let ((n-code (gensym "CODE")))
+           `(and (characterp ,n-obj)
+                 (let ((,n-code (sb!xc:char-code ,n-obj)))
+                   (or
+                    ,@(loop for pair in pairs
+                            collect
+                            `(<= ,(car pair) ,n-code ,(cdr pair)))))))))))
+
 ;;; Return the predicate and type from the most specific entry in
 ;;; *TYPE-PREDICATES* that is a supertype of TYPE.
 (defun find-supertype-predicate (type)
@@ -493,6 +508,8 @@
               (source-transform-array-typep object type))
              (cons-type
               (source-transform-cons-typep object type))
+             (character-set-type
+              (source-transform-character-set-typep object type))
              (t nil))
            `(%typep ,object ,spec)))
       (values nil t)))