X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=src%2Flisp%2Flist_iterator.hpp;h=bb9fe03667547b947b7512ebdb672e776140bb26;hb=2ad3ecbc14b77d373c796ad04d6389489666cc01;hp=c11594e9caad5c19a99087221e8081eb1c7aff7b;hpb=07ddaed2a657e4d2a3d038fed223fc5827159caf;p=supertux.git

diff --git a/src/lisp/list_iterator.hpp b/src/lisp/list_iterator.hpp
index c11594e9c..bb9fe0366 100644
--- a/src/lisp/list_iterator.hpp
+++ b/src/lisp/list_iterator.hpp
@@ -20,7 +20,9 @@
 #ifndef __LISP_ITERATOR_H__
 #define __LISP_ITERATOR_H__
 
-#include "lisp/lisp.hpp"
+#include <string>
+
+#include "lisp.hpp"
 
 namespace lisp
 {
@@ -33,22 +35,21 @@ class ListIterator
 {
 public:
   ListIterator(const lisp::Lisp* cur);
-  
+
   const std::string& item() const
   { return current_item; }
-  lisp::Lisp* lisp() const
+  const lisp::Lisp* lisp() const
   { return current_lisp; }
-  lisp::Lisp* value() const
+  const lisp::Lisp* value() const
   { return current_lisp->get_car(); }
   bool next();
 
 private:
   std::string current_item;
-  lisp::Lisp* current_lisp;
+  const lisp::Lisp* current_lisp;
   const lisp::Lisp* cur;
 };
 
 }
 
 #endif
-