diff -r 7a518df79892 -r 891f99700ea1 src/hugo/full_graph.h
--- a/src/hugo/full_graph.h	Mon Jul 19 13:32:28 2004 +0000
+++ b/src/hugo/full_graph.h	Tue Jul 20 09:43:12 2004 +0000
@@ -77,8 +77,8 @@
     InEdgeIt& first(InEdgeIt& e, const Node v) const { 
       e=InEdgeIt(*this,v); return e; }
 
-    bool valid(Edge e) const { return e.n!=-1; }
-    bool valid(Node n) const { return n.n!=-1; }
+    static bool valid(Edge e) const { return e.n!=-1; }
+    static bool valid(Node n) const { return n.n!=-1; }
     
     template <typename It> It getNext(It it) const
     { It tmp(it); return next(tmp); }
@@ -91,10 +91,10 @@
     { it.n+=NodeNum; if(it.n>=EdgeNum) it.n=-1; return it; }
     InEdgeIt& next(InEdgeIt& it) const
     { if(!((++it.n)%NodeNum)) it.n=-1; return it; }
-    EdgeIt& next(EdgeIt& it) const { --it.n; return it; }
+    static EdgeIt& next(EdgeIt& it) const { --it.n; return it; }
 
-    int id(Node v) const { return v.n; }
-    int id(Edge e) const { return e.n; }
+    static int id(Node v) const { return v.n; }
+    static int id(Edge e) const { return e.n; }
 
     class Node {
       friend class FullGraph;