Change action of argument to GENERATE-UNINTERNED-SYMBOL: a symbol or

string argument affects the result for that call only.

diff --git a/v7/src/runtime/gensym.scm b/v7/src/runtime/gensym.scm
index e9b2caecb7f99d5364ba2af37b03ba554646000d..a7090f3cdac1d1c194fe8b623552f6e385994007 100644 (file)
--- a/v7/src/runtime/gensym.scm
+++ b/v7/src/runtime/gensym.scm
@@ -1,8 +1,8 @@
 #| -*-Scheme-*-
 
-$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/runtime/gensym.scm,v 14.3 1990/02/20 15:58:32 jinx Rel $
+$Id: gensym.scm,v 14.4 1994/06/19 18:27:10 cph Exp $
 
-Copyright (c) 1988, 1989, 1990 Massachusetts Institute of Technology
+Copyright (c) 1988-94 Massachusetts Institute of Technology
 
 This material was developed by the Scheme project at the Massachusetts
 Institute of Technology, Department of Electrical Engineering and
@@ -36,27 +36,32 @@ MIT in each case. |#
 ;;; package: (runtime gensym)
 
 (declare (usual-integrations))
-\f
+
 (define (generate-uninterned-symbol #!optional argument)
-  (if (not (default-object? argument))
-      (cond ((string? argument)
-            (set! name-prefix argument))
-           ((symbol? argument)
-            (set! name-prefix (symbol->string argument)))
-           ((exact-nonnegative-integer? argument)
-            (set! name-counter argument))
-           (else
-            (error "GENERATE-UNINTERNED-SYMBOL: Bad argument" argument))))
-  (string->uninterned-symbol
-   (string-append name-prefix
-                 (number->string
-                  (let ((result name-counter))
-                    (set! name-counter (1+ name-counter))
-                    result)))))
+  (let ((prefix
+        (cond ((or (default-object? argument) (not argument))
+               name-prefix)
+              ((string? argument)
+               argument)
+              ((symbol? argument)
+               (symbol->string argument))
+              ((exact-nonnegative-integer? argument)
+               (set! name-counter argument)
+               name-prefix)
+              (else
+               (error:wrong-type-argument argument "symbol or integer"
+                                          'GENERATE-UNINTERNED-SYMBOL)))))
+    (string->uninterned-symbol
+     (string-append prefix
+                   (number->string
+                    (let ((result name-counter))
+                      (set! name-counter (1+ name-counter))
+                      result))))))
 
 (define name-counter)
 (define name-prefix)
 
 (define (initialize-package!)
   (set! name-counter 0)
-  (set! name-prefix "G"))
\ No newline at end of file
+  (set! name-prefix "G")
+  unspecific)
\ No newline at end of file