lib/graphviz/dot.treetop in ruby-graphviz-0.9.9 vs lib/graphviz/dot.treetop in ruby-graphviz-0.9.10

@@ -42,10 +42,18 @@
 	rule undirect_edge
 		space node_one:string blank "--" blank node_two:string blank other_nodes:("--" blank next_node:string blank)* options:options? separator <GraphViz::Parser::Edge>
 	end
 	
 	rule subgraph
+		named_subgraph / anonymous_subgraph
+	end
+	
+	rule named_subgraph
 	  space "subgraph" blank name:string space cluster:cluster space <GraphViz::Parser::Subgraph>
+	end
+	
+	rule anonymous_subgraph
+	  space "subgraph" space cluster:cluster space <GraphViz::Parser::AnonymousSubgraph>
 	end
 	
 	rule options
 		"[" space (name blank "=" blank string comma space)* name blank "=" blank string space "]" <GraphViz::Parser::Options>
 	end
\ No newline at end of file