/* -*- mode: C++; indent-tabs-mode: nil; -*-

 /* -*- mode: C++; indent-tabs-mode: nil; -*-

  *

  *

  * This file is a part of LEMON, a generic C++ optimization library.

  * This file is a part of LEMON, a generic C++ optimization library.

  *

  *

  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

  * (Egervary Research Group on Combinatorial Optimization, EGRES).

  * (Egervary Research Group on Combinatorial Optimization, EGRES).

  *

  *

  * Permission to use, modify and distribute this software is granted

  * Permission to use, modify and distribute this software is granted

  * provided that this copyright notice appears in all copies. For

  * provided that this copyright notice appears in all copies. For

   private:

   private:

     template <typename TDGR>

     template <typename TDGR>

     friend DigraphReader<TDGR> digraphReader(TDGR& digraph, std::istream& is);

     friend DigraphReader<TDGR> digraphReader(TDGR& digraph, std::istream& is);

     template <typename TDGR>

     template <typename TDGR>

                                              const std::string& fn);

                                              const std::string& fn);

     template <typename TDGR>

     template <typename TDGR>

     friend DigraphReader<TDGR> digraphReader(TDGR& digraph, const char *fn);

     friend DigraphReader<TDGR> digraphReader(TDGR& digraph, const char *fn);

     DigraphReader(DigraphReader& other)

     DigraphReader(DigraphReader& other)

     }

     }

     /// @}

     /// @}

   };

   };

   /// \ingroup lemon_io

   /// \ingroup lemon_io

   ///

   ///

   /// \brief Return a \ref DigraphReader class

   /// \brief Return a \ref DigraphReader class

   ///

   ///

   /// This function just returns a \ref DigraphReader class.

   /// This function just returns a \ref DigraphReader class.

   ///

   ///

   /// \ref lgf-format "LGF" file or input stream with several maps and

   /// \ref lgf-format "LGF" file or input stream with several maps and

   /// attributes. For example, there is network flow problem on a

   /// attributes. For example, there is network flow problem on a

   /// digraph, i.e. a digraph with a \e capacity map on the arcs and

   /// digraph, i.e. a digraph with a \e capacity map on the arcs and

   /// \e source and \e target nodes. This digraph can be read with the

   /// \e source and \e target nodes. This digraph can be read with the

   /// following code:

   /// following code:

     return tmp;

     return tmp;

   }

   }

   template <typename GR>

   template <typename GR>

   class GraphReader;

   class GraphReader;

   template <typename TGR>

   template <typename TGR>

   GraphReader<TGR> graphReader(TGR& graph, std::istream& is = std::cin);

   GraphReader<TGR> graphReader(TGR& graph, std::istream& is = std::cin);

   template <typename TGR>

   template <typename TGR>

   GraphReader<TGR> graphReader(TGR& graph, const std::string& fn);

   GraphReader<TGR> graphReader(TGR& graph, const std::string& fn);

   template <typename TGR>

   template <typename TGR>

   private:

   private:

     template <typename TGR>

     template <typename TGR>

     friend GraphReader<TGR> graphReader(TGR& graph, std::istream& is);

     friend GraphReader<TGR> graphReader(TGR& graph, std::istream& is);

     template <typename TGR>

     template <typename TGR>

     template <typename TGR>

     template <typename TGR>

     friend GraphReader<TGR> graphReader(TGR& graph, const char *fn);

     friend GraphReader<TGR> graphReader(TGR& graph, const char *fn);

     GraphReader(GraphReader& other)

     GraphReader(GraphReader& other)

       : _is(other._is), local_is(other.local_is), _graph(other._graph),

       : _is(other._is), local_is(other.local_is), _graph(other._graph),

   /// \ingroup lemon_io

   /// \ingroup lemon_io

   ///

   ///

   /// \brief Return a \ref GraphReader class

   /// \brief Return a \ref GraphReader class

   ///

   ///

   /// \ref lgf-format "LGF" file or input stream with several maps and

   /// \ref lgf-format "LGF" file or input stream with several maps and

   /// attributes. For example, there is weighted matching problem on a

   /// attributes. For example, there is weighted matching problem on a

   /// graph, i.e. a graph with a \e weight map on the edges. This

   /// graph, i.e. a graph with a \e weight map on the edges. This

   /// graph can be read with the following code:

   /// graph can be read with the following code:

   ///

   ///