diff -r fd1d073b6557 -r 567f392d1d2e src/lemon/concept/graph_component.h
--- a/src/lemon/concept/graph_component.h	Thu Nov 25 14:48:24 2004 +0000
+++ b/src/lemon/concept/graph_component.h	Sun Nov 28 16:30:10 2004 +0000
@@ -406,7 +406,7 @@
     /// This class provides beside the core graph features
     /// core clear functions for the graph structure.
     /// The most of the base graphs should be conform to this concept.
-    class BaseClearableGraphComponent : virtual public BaseGraphComponent {
+    class ClearableGraphComponent : virtual public BaseGraphComponent {
     public:
 
       /// Erase all the Nodes and Edges from the graph.
@@ -418,11 +418,11 @@
       template <typename _Graph>
       struct Constraints {
 	void constraints() {
-	  checkConcept< BaseGraphComponent, _Graph>();
+	  checkConcept<BaseGraphComponent, _Graph>();
 	  graph.clear();
 	}
 
-	_Graph& graph;
+	_Graph graph;
       };
     };
 
@@ -804,27 +804,6 @@
       };
     };
 
-    class ClearableGraphComponent : virtual public BaseGraphComponent {
-    public:
-
-      typedef ClearableGraphComponent Graph;
-
-      typedef BaseGraphComponent::Node Node;
-      typedef BaseGraphComponent::Edge Edge;
-
-      void clear() {}    
-
-
-      template <typename _Graph>
-      struct ClearableGraphComponentConcept {
-	void constraints() {
-	  checkConcept< BaseGraphComponent, _Graph >();
-	  graph.clear();
-	}
-	_Graph& graph;
-      };
-    };
-
   }
 
 }