sl@0: //=======================================================================
sl@0: // Copyright 2002 Indiana University.
sl@0: // Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek
sl@0: //
sl@0: // Distributed under the Boost Software License, Version 1.0. (See
sl@0: // accompanying file LICENSE_1_0.txt or copy at
sl@0: // http://www.boost.org/LICENSE_1_0.txt)
sl@0: //=======================================================================
sl@0: 
sl@0: #ifndef BOOST_GRAPH_EXCEPTION_HPP
sl@0: #define BOOST_GRAPH_EXCEPTION_HPP
sl@0: 
sl@0: #include <stdexcept>
sl@0: #include <string>
sl@0: 
sl@0: namespace boost {
sl@0: 
sl@0:   struct bad_graph : public std::invalid_argument {
sl@0:     bad_graph(const std::string& what_arg)
sl@0:       : std::invalid_argument(what_arg) { }
sl@0:   };
sl@0: 
sl@0:   struct not_a_dag : public bad_graph {
sl@0:     not_a_dag()
sl@0:         : bad_graph("The graph must be a DAG.") { } 
sl@0:   };
sl@0: 
sl@0:   struct negative_edge : public bad_graph {
sl@0:     negative_edge()
sl@0:       : bad_graph("The graph may not contain an edge with negative weight."){ }
sl@0:   };
sl@0: 
sl@0:   struct negative_cycle : public bad_graph {
sl@0:     negative_cycle()
sl@0:       : bad_graph("The graph may not contain negative cycles.") { }
sl@0:   };
sl@0:   struct not_connected : public bad_graph {
sl@0:     not_connected()
sl@0:       : bad_graph("The graph must be connected.") { }
sl@0:   };
sl@0: 
sl@0: } // namespace boost
sl@0: 
sl@0: #endif // BOOST_GRAPH_EXCEPTION_HPP