Add optional default-value to get-keyword-value.

diff --git a/src/runtime/list.scm b/src/runtime/list.scm
index 030d731cd06ba78735a133dad72988241a404b97..b2df695c6678bb69567b3f3a7a755eb386f243e9 100644 (file)
--- a/src/runtime/list.scm
+++ b/src/runtime/list.scm
@@ -1378,7 +1378,7 @@ USA.
 
 (define-guarantee unique-keyword-list "unique keyword list")
 
-(define (get-keyword-value klist key)
+(define (get-keyword-value klist key #!optional default-value)
   (let ((lose (lambda () (error:not-keyword-list klist 'GET-KEYWORD-VALUE))))
     (let loop ((klist klist))
       (if (pair? klist)
@@ -1391,7 +1391,7 @@ USA.
          (begin
            (if (not (null? klist))
                (lose))
-           #!default)))))
+           default-value)))))
 
 (define (keyword-list->alist klist)
   (let loop ((klist klist))