diff -r d769d2eb4d50 -r 080d51024ac5 lemon/bits/array_map.h
--- a/lemon/bits/array_map.h	Mon Apr 03 09:24:38 2006 +0000
+++ b/lemon/bits/array_map.h	Mon Apr 03 09:45:23 2006 +0000
@@ -23,6 +23,8 @@
 
 #include <lemon/bits/traits.h>
 #include <lemon/bits/alteration_notifier.h>
+#include <lemon/concept_check.h>
+#include <lemon/concept/maps.h>
 
 /// \ingroup graphbits
 /// \file
@@ -119,6 +121,35 @@
       }
     }
 
+    /// \brief Assign operator.
+    ///
+    /// This operator assigns for each item in the map the
+    /// value mapped to the same item in the copied map.  
+    /// The parameter map should be indiced with the same
+    /// itemset because this assign operator does not change
+    /// the container of the map. 
+    ArrayMap& operator=(const ArrayMap& cmap) {
+      return operator=<ArrayMap>(cmap);
+    }
+
+
+    /// \brief Template assign operator.
+    ///
+    /// The given parameter should be conform to the ReadMap
+    /// concecpt and could be indiced by the current item set of
+    /// the NodeMap. In this case the value for each item
+    /// is assigned by the value of the given ReadMap. 
+    template <typename CMap>
+    ArrayMap& operator=(const CMap& cmap) {
+      checkConcept<concept::ReadMap<Key, _Value>, CMap>();
+      const typename Parent::Notifier* notifier = Parent::getNotifier();
+      Item it;
+      for (notifier->first(it); it != INVALID; notifier->next(it)) {
+        set(it, cmap[it]);
+      }
+      return *this;
+    }
+
     /// \brief The destructor of the map.
     ///     
     /// The destructor of the map.
@@ -129,10 +160,6 @@
       }
     }
 		
-  private:
-
-    ArrayMap& operator=(const ArrayMap&);
-
   protected:
 
     using Parent::attach;