0.8.7.52:

[sbcl.git] / src / code / early-extensions.lisp

diff --git a/src/code/early-extensions.lisp b/src/code/early-extensions.lisp
index 065f569..cf74775 100644 (file)
--- a/src/code/early-extensions.lisp
+++ b/src/code/early-extensions.lisp
@@ -1138,3 +1138,31 @@ which can be found at <http://sbcl.sourceforge.net/>.~:@>"
 (defun promise-ready-p (promise)
   (or (not (consp promise))
       (car promise)))
+\f
+;;; toplevel helper
+(defmacro with-rebound-io-syntax (&body body)
+  `(%with-rebound-io-syntax (lambda () ,@body)))
+
+(defun %with-rebound-io-syntax (function)
+  (declare (type function function))
+  (let ((*package* *package*)
+       (*print-array* *print-array*)
+       (*print-base* *print-base*)
+       (*print-case* *print-case*)
+       (*print-circle* *print-circle*)
+       (*print-escape* *print-escape*)
+       (*print-gensym* *print-gensym*)
+       (*print-length* *print-length*)
+       (*print-level* *print-level*)
+       (*print-lines* *print-lines*)
+       (*print-miser-width* *print-miser-width*)
+       (*print-pretty* *print-pretty*)
+       (*print-radix* *print-radix*)
+       (*print-readably* *print-readably*)
+       (*print-right-margin* *print-right-margin*)
+       (*read-base* *read-base*)
+       (*read-default-float-format* *read-default-float-format*)
+       (*read-eval* *read-eval*)
+       (*read-suppress* *read-suppress*)
+       (*readtable* *readtable*))
+    (funcall function)))