patch::: 1.5.40.jcn1

[lilypond.git] / lily / include / property-iterator.hh

diff --git a/lily/include/property-iterator.hh b/lily/include/property-iterator.hh
index e72a0a894fa332d004def33c2e531e8c9e87cf15..9dd3b2cce08abb650bd8cca34278ee5991359e6b 100644 (file)
--- a/lily/include/property-iterator.hh
+++ b/lily/include/property-iterator.hh
@@ -3,7 +3,7 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c)  1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
 
 
@@ -28,6 +28,22 @@ protected:
   virtual void process (Moment);
 };
 
+
+
+
+/**
+  Iterate a property.  
+ */
+class Property_unset_iterator : public Simple_music_iterator
+{
+public:
+  VIRTUAL_COPY_CONS (Music_iterator);
+  static SCM constructor_cxx_function;
+  /* construction */
+protected:
+  virtual void process (Moment);
+};
+
 class Push_property_iterator : public Simple_music_iterator
 {
 public: