diff -r f2ea4aac9ada -r c94ef40a22ce src/test/new_graph_test.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/test/new_graph_test.cc	Wed Oct 27 22:38:50 2004 +0000
@@ -0,0 +1,39 @@
+/* -*- C++ -*-
+ * src/test/new_graph_test.cc - Part of LEMON, a generic C++ optimization library
+ *
+ * Copyright (C) 2004 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
+ * (Egervary Combinatorial Optimization Research Group, EGRES).
+ *
+ * Permission to use, modify and distribute this software is granted
+ * provided that this copyright notice appears in all copies. For
+ * precise terms see the accompanying LICENSE file.
+ *
+ * This software is provided "AS IS" with no warranty of any kind,
+ * express or implied, and with no claim as to its suitability for any
+ * purpose.
+ *
+ */
+
+#include <lemon/skeletons/graph.h>
+// #include <boost/concept_check.hpp>
+
+using namespace lemon::skeleton;
+
+// Borrowed from boost:
+template <class T> inline void ignore_unused_variable_warning(const T&) { }
+
+int main()
+{
+  //    This is the "right" way to check a concept:
+  // boost::function_requires< BaseGraphItemConcept<BaseGraphItem> >();
+
+  //    which is equivalent (considering compile-time checks) to
+  // BaseGraphItemConcept<BaseGraphItem> bgic;
+  // bgic.constraints();
+  //    but not actually call or intatiates anything...
+  //    It's doing aproximately this:
+  typedef BaseGraphItemConcept<BaseGraphItem> CC;
+  void (CC::*x)() = &CC::constraints;
+  ignore_unused_variable_warning(x);
+  //    But even more hackish...
+}