X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Finclude%2Fitem.hh;h=914d2ef7b8311b6c622ae0158d680b1846e9e9e5;hb=47db9a3883d726ca53e2133a3b2298f78dd6a32e;hp=945866632e190866d86f3ef0d76ba5d9b62f1c2c;hpb=525a57c5bc0ce6f92af465d1aa9653c5a8db82e1;p=lilypond.git

diff --git a/lily/include/item.hh b/lily/include/item.hh
index 945866632e..914d2ef7b8 100644
--- a/lily/include/item.hh
+++ b/lily/include/item.hh
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1997--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
   LilyPond is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -36,10 +36,18 @@ public:
   Item (SCM);
   Item (Item const &);
 
+  static Item *unsmob (SCM g) {
+    return dynamic_cast <Item *> (Grob::unsmob (g));
+  }
+  static bool is_smob (SCM g) {
+    return Grob::is_smob (g) && unsmob (g);
+  }
+
   virtual Grob *clone () const;
 
   static bool is_non_musical (Grob *);
   static bool break_visible (Grob *);
+
   bool is_broken () const;
   virtual bool pure_is_visible (int start, int end) const;