X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/lisp/blobdiff_plain/2af61873236491d221b3cbd8bbab4320a2beb7f4..67cb6748a3e277c0a6bab682aa31249850445226:/mdw-base.lisp

diff --git a/mdw-base.lisp b/mdw-base.lisp
index 2c463e9..072c8d6 100644
--- a/mdw-base.lisp
+++ b/mdw-base.lisp
@@ -119,9 +119,12 @@ (compile-time-defun pairify (x &optional (y nil defaultp))
 (defun whitespace-char-p (ch)
   "Return whether CH is a whitespace character or not."
   (case ch
-    ((#\space #\tab #\newline #\return #\vt
-	      #+cmu #\formfeed
-	      #+clisp #\page) t)
+    (#.(loop for i below char-code-limit
+	     for ch = (code-char i)
+	     unless (with-input-from-string (in (string ch))
+		      (peek-char t in nil))
+	     collect ch)
+       t)
     (t nil)))
 
 (declaim (ftype (function nil ()) slot-unitialized))