--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ossrv_pub/boost_apis/boost/graph/exception.hpp	Fri Jun 04 16:20:51 2010 +0100
@@ -0,0 +1,44 @@
+//=======================================================================
+// Copyright 2002 Indiana University.
+// Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//=======================================================================
+
+#ifndef BOOST_GRAPH_EXCEPTION_HPP
+#define BOOST_GRAPH_EXCEPTION_HPP
+
+#include <stdexcept>
+#include <string>
+
+namespace boost {
+
+  struct bad_graph : public std::invalid_argument {
+    bad_graph(const std::string& what_arg)
+      : std::invalid_argument(what_arg) { }
+  };
+
+  struct not_a_dag : public bad_graph {
+    not_a_dag()
+        : bad_graph("The graph must be a DAG.") { } 
+  };
+
+  struct negative_edge : public bad_graph {
+    negative_edge()
+      : bad_graph("The graph may not contain an edge with negative weight."){ }
+  };
+
+  struct negative_cycle : public bad_graph {
+    negative_cycle()
+      : bad_graph("The graph may not contain negative cycles.") { }
+  };
+  struct not_connected : public bad_graph {
+    not_connected()
+      : bad_graph("The graph must be connected.") { }
+  };
+
+} // namespace boost
+
+#endif // BOOST_GRAPH_EXCEPTION_HPP