# HG changeset patch
# User Balazs Dezso <deba@inf.elte.hu>
# Date 2008-07-29 10:27:36
# Node ID 9c8efad5f587ab80bc4dc76918e4fdbc2adfc905
# Parent  ad6b8c47bd56c03d587feab33d875a72b2adfd6f

Fixing constness of Graph in GraphWriter

diff --git a/lemon/lgf_writer.h b/lemon/lgf_writer.h
--- a/lemon/lgf_writer.h
+++ b/lemon/lgf_writer.h
@@ -934,7 +934,7 @@
     std::ostream* _os;
     bool local_os;
 
-    Graph& _graph;
+    const Graph& _graph;
 
     std::string _nodes_caption;
     std::string _edges_caption;