LEMON/LEMON-main Changeset - r598:a3402913cffe

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Changeset - r598:a3402913cffe

« 573:37216c

599:f63e87 »

r598:a3402913cffe

Sat, 18 Apr 2009 21:54:30

[Not Reviewed]

0 comments (0 inline)

deba@inf.elte.hu
deba@inf.elte.hu

Add more docs to LGF function interface (#109)

0 2 0

default

2 files changed with 300 insertions and 181 deletions:

lemon/lgf_reader.h

164

103

lemon/lgf_writer.h

136

↑ Collapse diff ↑

lemon/lgf_reader.h

Show inline comments

@@ -101,23 +101,23 @@
+		      }
 		    };
-		    template <typename _Graph, bool _dir, typename _Map,
+		    template <typename _GR, bool _dir, typename _Map,
 		              typename _Converter = DefaultConverter<typename _Map::Value> >
-		    class GraphArcMapStorage : public MapStorageBase<typename _Graph::Edge> {
+		    class GraphArcMapStorage : public MapStorageBase<typename _GR::Edge> {
 		    public:
 		      typedef _Map Map;
 		      typedef _Converter Converter;
 		      typedef _Graph Graph;
 		      typedef typename Graph::Edge Item;
 		      typedef _GR GR;
 		      typedef typename GR::Edge Item;
 		      static const bool dir = _dir;
 		    private:
-		      const Graph& _graph;
+		      const GR& _graph;
 		      Map& _map;
 		      Converter _converter;
 		    public:
-		      GraphArcMapStorage(const Graph& graph, Map& map,
+		      GraphArcMapStorage(const GR& graph, Map& map,
 		                         const Converter& converter = Converter())
 		        : _graph(graph), _map(map), _converter(converter) {}
 		      virtual ~GraphArcMapStorage() {}
@@ -173,21 +173,21 @@
+		      }
 		    };
-		    template <typename Graph>
+		    template <typename GR>
 		    struct GraphArcLookUpConverter {
 		      const Graph& _graph;
 		      const std::map<std::string, typename Graph::Edge>& _map;
 		      GraphArcLookUpConverter(const Graph& graph,
 		      const GR& _graph;
 		      const std::map<std::string, typename GR::Edge>& _map;
 		      GraphArcLookUpConverter(const GR& graph,
 		                              const std::map<std::string,
-		                                             typename Graph::Edge>& map)
+		                                             typename GR::Edge>& map)
 		        : _graph(graph), _map(map) {}
-		      typename Graph::Arc operator()(const std::string& str) {
+		      typename GR::Arc operator()(const std::string& str) {
 		        if (str.empty() || (str[0] != '+' && str[0] != '-')) {
 		          throw FormatError("Item must start with '+' or '-'");
+		        }
-		        typename std::map<std::string, typename Graph::Edge>
+		        typename std::map<std::string, typename GR::Edge>
 		          ::const_iterator it = _map.find(str.substr(1));
 		        if (it == _map.end()) {
 		          throw FormatError("Item not found");
@@ -387,16 +387,15 @@
+		  }
-		  template <typename Digraph>
+		  template <typename DGR>
 		  class DigraphReader;
 		  template <typename Digraph>
 		  DigraphReader<Digraph> digraphReader(Digraph& digraph,
 		                                       std::istream& is = std::cin);
 		  template <typename Digraph>
 		  DigraphReader<Digraph> digraphReader(Digraph& digraph, const std::string& fn);
 		  template <typename Digraph>
-		  DigraphReader<Digraph> digraphReader(Digraph& digraph, const char *fn);
+		  template <typename TDGR>
 		  DigraphReader<TDGR> digraphReader(TDGR& digraph, std::istream& is = std::cin);
 		  template <typename TDGR>
 		  DigraphReader<TDGR> digraphReader(TDGR& digraph, const std::string& fn);
 		  template <typename TDGR>
 		  DigraphReader<TDGR> digraphReader(TDGR& digraph, const char *fn);
 		  /// \ingroup lemon_io
 		  ///
@@ -419,7 +418,7 @@
 		  /// rules.
 		  ///
 		  ///\code
-		  /// DigraphReader<Digraph>(digraph, std::cin).
+		  /// DigraphReader<DGR>(digraph, std::cin).
 		  ///   nodeMap("coordinates", coord_map).
 		  ///   arcMap("capacity", cap_map).
 		  ///   node("source", src).
@@ -448,21 +447,21 @@
 		  /// It is impossible to read this in
 		  /// a single pass, because the arcs are not constructed when the node
 		  /// maps are read.
-		  template <typename GR>
+		  template <typename DGR>
 		  class DigraphReader {
 		  public:
-		    typedef GR Digraph;
+		    typedef DGR Digraph;
 		  private:
-		    TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);
+		    TEMPLATE_DIGRAPH_TYPEDEFS(DGR);
 		    std::istream* _is;
 		    bool local_is;
 		    std::string _filename;
-		    Digraph& _digraph;
+		    DGR& _digraph;
 		    std::string _nodes_caption;
 		    std::string _arcs_caption;
@@ -500,7 +499,7 @@
 		    ///
 		    /// Construct a directed graph reader, which reads from the given
 		    /// input stream.
-		    DigraphReader(Digraph& digraph, std::istream& is = std::cin)
+		    DigraphReader(DGR& digraph, std::istream& is = std::cin)
 		      : _is(&is), local_is(false), _digraph(digraph),
 		        _use_nodes(false), _use_arcs(false),
 		        _skip_nodes(false), _skip_arcs(false) {}
@@ -509,7 +508,7 @@
 		    ///
 		    /// Construct a directed graph reader, which reads from the given
 		    /// file.
-		    DigraphReader(Digraph& digraph, const std::string& fn)
+		    DigraphReader(DGR& digraph, const std::string& fn)
 		      : _is(new std::ifstream(fn.c_str())), local_is(true),
 		        _filename(fn), _digraph(digraph),
 		        _use_nodes(false), _use_arcs(false),
@@ -524,7 +523,7 @@
 		    ///
 		    /// Construct a directed graph reader, which reads from the given
 		    /// file.
-		    DigraphReader(Digraph& digraph, const char* fn)
+		    DigraphReader(DGR& digraph, const char* fn)
 		      : _is(new std::ifstream(fn)), local_is(true),
 		        _filename(fn), _digraph(digraph),
 		        _use_nodes(false), _use_arcs(false),
@@ -560,13 +559,13 @@
 		  private:
 		    template <typename DGR>
 		    friend DigraphReader<DGR> digraphReader(DGR& digraph, std::istream& is);
 		    template <typename DGR>
 		    friend DigraphReader<DGR> digraphReader(DGR& digraph,
 		    template <typename TDGR>
 		    friend DigraphReader<TDGR> digraphReader(TDGR& digraph, std::istream& is);
 		    template <typename TDGR>
 		    friend DigraphReader<TDGR> digraphReader(TDGR& digraph,
 		                                            const std::string& fn);
 		    template <typename DGR>
 		    friend DigraphReader<DGR> digraphReader(DGR& digraph, const char *fn);
 		    template <typename TDGR>
 		    friend DigraphReader<TDGR> digraphReader(TDGR& digraph, const char *fn);
 		    DigraphReader(DigraphReader& other)
 		      : _is(other._is), local_is(other.local_is), _digraph(other._digraph),
@@ -1189,13 +1188,51 @@
 		  };
 		  /// \ingroup lemon_io
 		  ///
 		  /// \brief Return a \ref DigraphReader class
 		  ///
 		  /// This function just returns a \ref DigraphReader class.
 		  ///
 		  /// With this function a digraph can be read from an
 		  /// \ref lgf-format "LGF" file or input stream with several maps and
 		  /// attributes. For example, there is network flow problem on a
 		  /// 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
 		  /// following code:
 		  ///
 		  ///\code
 		  ///ListDigraph digraph;
 		  ///ListDigraph::ArcMap<int> cm(digraph);
 		  ///ListDigraph::Node src, trg;
 		  ///digraphReader(digraph, std::cin).
 		  ///  arcMap("capacity", cap).
 		  ///  node("source", src).
 		  ///  node("target", trg).
 		  ///  run();
 		  ///\endcode
 		  ///
 		  /// For a complete documentation, please see the \ref DigraphReader
 		  /// class documentation.
 		  /// \warning Don't forget to put the \ref DigraphReader::run() "run()"
 		  /// to the end of the parameter list.
 		  /// \relates DigraphReader
 		  /// \sa digraphReader(TDGR& digraph, const std::string& fn)
 		  /// \sa digraphReader(TDGR& digraph, const char* fn)
 		  template <typename TDGR>
 		  DigraphReader<TDGR> digraphReader(TDGR& digraph, std::istream& is) {
 		    DigraphReader<TDGR> tmp(digraph, is);
 		    return tmp;
+		  }
 		  /// \brief Return a \ref DigraphReader class
 		  ///
 		  /// This function just returns a \ref DigraphReader class.
 		  /// \relates DigraphReader
 		  template <typename Digraph>
 		  DigraphReader<Digraph> digraphReader(Digraph& digraph, std::istream& is) {
-		    DigraphReader<Digraph> tmp(digraph, is);
+		  /// \sa digraphReader(TDGR& digraph, std::istream& is)
 		  template <typename TDGR>
 		  DigraphReader<TDGR> digraphReader(TDGR& digraph, const std::string& fn) {
 		    DigraphReader<TDGR> tmp(digraph, fn);
 		    return tmp;
+		  }
@@ -1203,33 +1240,22 @@
 		  ///
 		  /// This function just returns a \ref DigraphReader class.
 		  /// \relates DigraphReader
 		  template <typename Digraph>
 		  DigraphReader<Digraph> digraphReader(Digraph& digraph,
 		                                       const std::string& fn) {
 		    DigraphReader<Digraph> tmp(digraph, fn);
 		  /// \sa digraphReader(TDGR& digraph, std::istream& is)
 		  template <typename TDGR>
 		  DigraphReader<TDGR> digraphReader(TDGR& digraph, const char* fn) {
 		    DigraphReader<TDGR> tmp(digraph, fn);
 		    return tmp;
+		  }
 		  /// \brief Return a \ref DigraphReader class
 		  ///
 		  /// This function just returns a \ref DigraphReader class.
 		  /// \relates DigraphReader
 		  template <typename Digraph>
 		  DigraphReader<Digraph> digraphReader(Digraph& digraph, const char* fn) {
 		    DigraphReader<Digraph> tmp(digraph, fn);
 		    return tmp;
+		  }
-		  template <typename Graph>
+		  template <typename GR>
 		  class GraphReader;
 		  template <typename Graph>
 		  GraphReader<Graph> graphReader(Graph& graph,
 		                                 std::istream& is = std::cin);
 		  template <typename Graph>
 		  GraphReader<Graph> graphReader(Graph& graph, const std::string& fn);
 		  template <typename Graph>
-		  GraphReader<Graph> graphReader(Graph& graph, const char *fn);
+		  template <typename TGR>
 		  GraphReader<TGR> graphReader(TGR& graph, std::istream& is = std::cin);
 		  template <typename TGR>
 		  GraphReader<TGR> graphReader(TGR& graph, const std::string& fn);
 		  template <typename TGR>
 		  GraphReader<TGR> graphReader(TGR& graph, const char *fn);
 		  /// \ingroup lemon_io
 		  ///
@@ -1254,13 +1280,13 @@
 		  private:
-		    TEMPLATE_GRAPH_TYPEDEFS(Graph);
+		    TEMPLATE_GRAPH_TYPEDEFS(GR);
 		    std::istream* _is;
 		    bool local_is;
 		    std::string _filename;
-		    Graph& _graph;
+		    GR& _graph;
 		    std::string _nodes_caption;
 		    std::string _edges_caption;
@@ -1298,7 +1324,7 @@
 		    ///
 		    /// Construct an undirected graph reader, which reads from the given
 		    /// input stream.
-		    GraphReader(Graph& graph, std::istream& is = std::cin)
+		    GraphReader(GR& graph, std::istream& is = std::cin)
 		      : _is(&is), local_is(false), _graph(graph),
 		        _use_nodes(false), _use_edges(false),
 		        _skip_nodes(false), _skip_edges(false) {}
@@ -1307,7 +1333,7 @@
 		    ///
 		    /// Construct an undirected graph reader, which reads from the given
 		    /// file.
-		    GraphReader(Graph& graph, const std::string& fn)
+		    GraphReader(GR& graph, const std::string& fn)
 		      : _is(new std::ifstream(fn.c_str())), local_is(true),
 		        _filename(fn), _graph(graph),
 		        _use_nodes(false), _use_edges(false),
@@ -1322,7 +1348,7 @@
 		    ///
 		    /// Construct an undirected graph reader, which reads from the given
 		    /// file.
-		    GraphReader(Graph& graph, const char* fn)
+		    GraphReader(GR& graph, const char* fn)
 		      : _is(new std::ifstream(fn)), local_is(true),
 		        _filename(fn), _graph(graph),
 		        _use_nodes(false), _use_edges(false),
@@ -1357,12 +1383,12 @@
+		    }
 		  private:
 		    template <typename Graph>
 		    friend GraphReader<Graph> graphReader(Graph& graph, std::istream& is);
 		    template <typename Graph>
 		    friend GraphReader<Graph> graphReader(Graph& graph, const std::string& fn);
 		    template <typename Graph>
 		    friend GraphReader<Graph> graphReader(Graph& graph, const char *fn);
 		    template <typename TGR>
 		    friend GraphReader<TGR> graphReader(TGR& graph, std::istream& is);
 		    template <typename TGR>
 		    friend GraphReader<TGR> graphReader(TGR& graph, const std::string& fn);
 		    template <typename TGR>
 		    friend GraphReader<TGR> graphReader(TGR& graph, const char *fn);
 		    GraphReader(GraphReader& other)
 		      : _is(other._is), local_is(other.local_is), _graph(other._graph),
@@ -1454,7 +1480,7 @@
 		        new _reader_bits::GraphArcMapStorage<Graph, true, Map>(_graph, map);
 		      _edge_maps.push_back(std::make_pair('+' + caption, forward_storage));
 		      _reader_bits::MapStorageBase<Edge>* backward_storage =
-		        new _reader_bits::GraphArcMapStorage<Graph, false, Map>(_graph, map);
+		        new _reader_bits::GraphArcMapStorage<GR, false, Map>(_graph, map);
 		      _edge_maps.push_back(std::make_pair('-' + caption, backward_storage));
 		      return *this;
+		    }
@@ -1468,11 +1494,11 @@
 		                          const Converter& converter = Converter()) {
 		      checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>();
 		      _reader_bits::MapStorageBase<Edge>* forward_storage =
-		        new _reader_bits::GraphArcMapStorage<Graph, true, Map, Converter>
+		        new _reader_bits::GraphArcMapStorage<GR, true, Map, Converter>
 		        (_graph, map, converter);
 		      _edge_maps.push_back(std::make_pair('+' + caption, forward_storage));
 		      _reader_bits::MapStorageBase<Edge>* backward_storage =
-		        new _reader_bits::GraphArcMapStorage<Graph, false, Map, Converter>
+		        new _reader_bits::GraphArcMapStorage<GR, false, Map, Converter>
 		        (_graph, map, converter);
 		      _edge_maps.push_back(std::make_pair('-' + caption, backward_storage));
 		      return *this;
@@ -1530,7 +1556,7 @@
 		    ///
 		    /// Add an arc reading rule to reader.
 		    GraphReader& arc(const std::string& caption, Arc& arc) {
-		      typedef _reader_bits::GraphArcLookUpConverter<Graph> Converter;
+		      typedef _reader_bits::GraphArcLookUpConverter<GR> Converter;
 		      Converter converter(_graph, _edge_index);
 		      _reader_bits::ValueStorageBase* storage =
 		        new _reader_bits::ValueStorage<Arc, Converter>(arc, converter);
@@ -2033,13 +2059,47 @@
 		  };
 		  /// \ingroup lemon_io
 		  ///
 		  /// \brief Return a \ref GraphReader class
 		  ///
 		  /// This function just returns a \ref GraphReader class.
 		  ///
 		  /// With this function a graph can be read from an
 		  /// \ref lgf-format "LGF" file or input stream with several maps and
 		  /// 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 can be read with the following code:
 		  ///
 		  ///\code
 		  ///ListGraph graph;
 		  ///ListGraph::EdgeMap<int> weight(graph);
 		  ///graphReader(graph, std::cin).
 		  ///  edgeMap("weight", weight).
 		  ///  run();
 		  ///\endcode
 		  ///
 		  /// For a complete documentation, please see the \ref GraphReader
 		  /// class documentation.
 		  /// \warning Don't forget to put the \ref GraphReader::run() "run()"
 		  /// to the end of the parameter list.
 		  /// \relates GraphReader
 		  /// \sa graphReader(TGR& graph, const std::string& fn)
 		  /// \sa graphReader(TGR& graph, const char* fn)
 		  template <typename TGR>
 		  GraphReader<TGR> graphReader(TGR& graph, std::istream& is) {
 		    GraphReader<TGR> tmp(graph, is);
 		    return tmp;
+		  }
 		  /// \brief Return a \ref GraphReader class
 		  ///
 		  /// This function just returns a \ref GraphReader class.
 		  /// \relates GraphReader
 		  template <typename Graph>
 		  GraphReader<Graph> graphReader(Graph& graph, std::istream& is) {
-		    GraphReader<Graph> tmp(graph, is);
+		  /// \sa graphReader(TGR& graph, std::istream& is)
 		  template <typename TGR>
 		  GraphReader<TGR> graphReader(TGR& graph, const std::string& fn) {
 		    GraphReader<TGR> tmp(graph, fn);
 		    return tmp;
+		  }
@@ -2047,19 +2107,10 @@
 		  ///
 		  /// This function just returns a \ref GraphReader class.
 		  /// \relates GraphReader
 		  template <typename Graph>
 		  GraphReader<Graph> graphReader(Graph& graph, const std::string& fn) {
 		    GraphReader<Graph> tmp(graph, fn);
 		    return tmp;
+		  }
 		  /// \brief Return a \ref GraphReader class
 		  ///
 		  /// This function just returns a \ref GraphReader class.
 		  /// \relates GraphReader
 		  template <typename Graph>
 		  GraphReader<Graph> graphReader(Graph& graph, const char* fn) {
-		    GraphReader<Graph> tmp(graph, fn);
+		  /// \sa graphReader(TGR& graph, std::istream& is)
 		  template <typename TGR>
 		  GraphReader<TGR> graphReader(TGR& graph, const char* fn) {
 		    GraphReader<TGR> tmp(graph, fn);
 		    return tmp;
+		  }
@@ -2316,12 +2367,30 @@
 		  };
 		  /// \ingroup lemon_io
 		  ///
 		  /// \brief Return a \ref SectionReader class
 		  ///
 		  /// This function just returns a \ref SectionReader class.
 		  ///
 		  /// Please see SectionReader documentation about the custom section
 		  /// input.
 		  ///
 		  /// \relates SectionReader
 		  /// \sa sectionReader(const std::string& fn)
 		  /// \sa sectionReader(const char *fn)
 		  inline SectionReader sectionReader(std::istream& is) {
 		    SectionReader tmp(is);
 		    return tmp;
+		  }
 		  /// \brief Return a \ref SectionReader class
 		  ///
 		  /// This function just returns a \ref SectionReader class.
 		  /// \relates SectionReader
 		  inline SectionReader sectionReader(std::istream& is) {
 		    SectionReader tmp(is);
 		  /// \sa sectionReader(std::istream& is)
 		  inline SectionReader sectionReader(const std::string& fn) {
 		    SectionReader tmp(fn);
 		    return tmp;
+		  }
@@ -2329,15 +2398,7 @@
 		  ///
 		  /// This function just returns a \ref SectionReader class.
 		  /// \relates SectionReader
 		  inline SectionReader sectionReader(const std::string& fn) {
 		    SectionReader tmp(fn);
 		    return tmp;
+		  }
 		  /// \brief Return a \ref SectionReader class
 		  ///
 		  /// This function just returns a \ref SectionReader class.
-		  /// \relates SectionReader
+		  /// \sa sectionReader(std::istream& is)
 		  inline SectionReader sectionReader(const char* fn) {
 		    SectionReader tmp(fn);
 		    return tmp;

lemon/lgf_writer.h

Show inline comments

@@ -347,19 +347,17 @@
+		  }
-		  template <typename Digraph>
+		  template <typename DGR>
 		  class DigraphWriter;
 		  template <typename Digraph>
 		  DigraphWriter<Digraph> digraphWriter(const Digraph& digraph,
 		  template <typename TDGR>
 		  DigraphWriter<TDGR> digraphWriter(const TDGR& digraph,
 		                                       std::ostream& os = std::cout);
 		  template <typename Digraph>
 		  DigraphWriter<Digraph> digraphWriter(const Digraph& digraph,
-		                                       const std::string& fn);
+		  template <typename TDGR>
 		  DigraphWriter<TDGR> digraphWriter(const TDGR& digraph, const std::string& fn);
 		  template <typename Digraph>
 		  DigraphWriter<Digraph> digraphWriter(const Digraph& digraph,
-		                                       const char* fn);
+		  template <typename TDGR>
 		  DigraphWriter<TDGR> digraphWriter(const TDGR& digraph, const char* fn);
 		  /// \ingroup lemon_io
@@ -381,7 +379,7 @@
 		  /// arc() functions are used to add attribute writing rules.
 		  ///
 		  ///\code
-		  /// DigraphWriter<Digraph>(digraph, std::cout).
+		  /// DigraphWriter<DGR>(digraph, std::cout).
 		  ///   nodeMap("coordinates", coord_map).
 		  ///   nodeMap("size", size).
 		  ///   nodeMap("title", title).
@@ -406,12 +404,12 @@
 		  /// section to the stream. The output stream can be retrieved with
 		  /// the \c ostream() function, hence the second pass can append its
 		  /// output to the output of the first pass.
-		  template <typename GR>
+		  template <typename DGR>
 		  class DigraphWriter {
 		  public:
 		    typedef GR Digraph;
 		    TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);
 		    typedef DGR Digraph;
 		    TEMPLATE_DIGRAPH_TYPEDEFS(DGR);
 		  private:
@@ -419,7 +417,7 @@
 		    std::ostream* _os;
 		    bool local_os;
-		    const Digraph& _digraph;
+		    const DGR& _digraph;
 		    std::string _nodes_caption;
 		    std::string _arcs_caption;
@@ -451,7 +449,7 @@
 		    ///
 		    /// Construct a directed graph writer, which writes to the given
 		    /// output stream.
-		    DigraphWriter(const Digraph& digraph, std::ostream& os = std::cout)
+		    DigraphWriter(const DGR& digraph, std::ostream& os = std::cout)
 		      : _os(&os), local_os(false), _digraph(digraph),
 		        _skip_nodes(false), _skip_arcs(false) {}
@@ -459,7 +457,7 @@
 		    ///
 		    /// Construct a directed graph writer, which writes to the given
 		    /// output file.
-		    DigraphWriter(const Digraph& digraph, const std::string& fn)
+		    DigraphWriter(const DGR& digraph, const std::string& fn)
 		      : _os(new std::ofstream(fn.c_str())), local_os(true), _digraph(digraph),
 		        _skip_nodes(false), _skip_arcs(false) {
 		      if (!(*_os)) {
@@ -472,7 +470,7 @@
 		    ///
 		    /// Construct a directed graph writer, which writes to the given
 		    /// output file.
-		    DigraphWriter(const Digraph& digraph, const char* fn)
+		    DigraphWriter(const DGR& digraph, const char* fn)
 		      : _os(new std::ofstream(fn)), local_os(true), _digraph(digraph),
 		        _skip_nodes(false), _skip_arcs(false) {
 		      if (!(*_os)) {
@@ -505,14 +503,14 @@
 		  private:
 		    template <typename DGR>
 		    friend DigraphWriter<DGR> digraphWriter(const DGR& digraph,
 		    template <typename TDGR>
 		    friend DigraphWriter<TDGR> digraphWriter(const TDGR& digraph,
 		                                            std::ostream& os);
 		    template <typename DGR>
 		    friend DigraphWriter<DGR> digraphWriter(const DGR& digraph,
 		    template <typename TDGR>
 		    friend DigraphWriter<TDGR> digraphWriter(const TDGR& digraph,
 		                                            const std::string& fn);
 		    template <typename DGR>
 		    friend DigraphWriter<DGR> digraphWriter(const DGR& digraph,
 		    template <typename TDGR>
 		    friend DigraphWriter<TDGR> digraphWriter(const TDGR& digraph,
 		                                            const char *fn);
 		    DigraphWriter(DigraphWriter& other)
@@ -724,8 +722,8 @@
+		      }
 		      if (label == 0) {
 		        IdMap<Digraph, Node> id_map(_digraph);
 		        _writer_bits::MapLess<IdMap<Digraph, Node> > id_less(id_map);
 		        IdMap<DGR, Node> id_map(_digraph);
 		        _writer_bits::MapLess<IdMap<DGR, Node> > id_less(id_map);
 		        std::sort(nodes.begin(), nodes.end(), id_less);
 		      } else {
 		        label->sort(nodes);
@@ -809,8 +807,8 @@
+		      }
 		      if (label == 0) {
 		        IdMap<Digraph, Arc> id_map(_digraph);
 		        _writer_bits::MapLess<IdMap<Digraph, Arc> > id_less(id_map);
 		        IdMap<DGR, Arc> id_map(_digraph);
 		        _writer_bits::MapLess<IdMap<DGR, Arc> > id_less(id_map);
 		        std::sort(arcs.begin(), arcs.end(), id_less);
 		      } else {
 		        label->sort(arcs);
@@ -915,14 +913,41 @@
 		    /// @}
 		  };
 		  /// \ingroup lemon_io
 		  ///
 		  /// \brief Return a \ref DigraphWriter class
 		  ///
 		  /// This function just returns a \ref DigraphWriter class.
 		  ///
 		  /// With this function a digraph can be write to a file or output
 		  /// stream in \ref lgf-format "LGF" format with several maps and
 		  /// attributes. For example, with the following code a network flow
 		  /// problem can be written to the standard output, i.e. a digraph
 		  /// with a \e capacity map on the arcs and \e source and \e target
 		  /// nodes:
 		  ///
 		  ///\code
 		  ///ListDigraph digraph;
 		  ///ListDigraph::ArcMap<int> cap(digraph);
 		  ///ListDigraph::Node src, trg;
 		  ///  // Setting the capacity map and source and target nodes
 		  ///digraphWriter(digraph, std::cout).
 		  ///  arcMap("capacity", cap).
 		  ///  node("source", src).
 		  ///  node("target", trg).
 		  ///  run();
 		  ///\endcode
 		  ///
 		  /// For a complete documentation, please see the \ref DigraphWriter
 		  /// class documentation.
 		  /// \warning Don't forget to put the \ref DigraphWriter::run() "run()"
 		  /// to the end of the parameter list.
 		  /// \relates DigraphWriter
 		  template <typename Digraph>
 		  DigraphWriter<Digraph> digraphWriter(const Digraph& digraph,
 		                                       std::ostream& os) {
 		    DigraphWriter<Digraph> tmp(digraph, os);
 		  /// \sa digraphWriter(const TDGR& digraph, const std::string& fn)
 		  /// \sa digraphWriter(const TDGR& digraph, const char* fn)
 		  template <typename TDGR>
 		  DigraphWriter<TDGR> digraphWriter(const TDGR& digraph, std::ostream& os) {
 		    DigraphWriter<TDGR> tmp(digraph, os);
 		    return tmp;
+		  }
@@ -930,10 +955,11 @@
 		  ///
 		  /// This function just returns a \ref DigraphWriter class.
 		  /// \relates DigraphWriter
 		  template <typename Digraph>
 		  DigraphWriter<Digraph> digraphWriter(const Digraph& digraph,
 		  /// \sa digraphWriter(const TDGR& digraph, std::ostream& os)
 		  template <typename TDGR>
 		  DigraphWriter<TDGR> digraphWriter(const TDGR& digraph,
 		                                       const std::string& fn) {
-		    DigraphWriter<Digraph> tmp(digraph, fn);
+		    DigraphWriter<TDGR> tmp(digraph, fn);
 		    return tmp;
+		  }
@@ -941,23 +967,22 @@
 		  ///
 		  /// This function just returns a \ref DigraphWriter class.
 		  /// \relates DigraphWriter
 		  template <typename Digraph>
 		  DigraphWriter<Digraph> digraphWriter(const Digraph& digraph,
 		                                       const char* fn) {
 		    DigraphWriter<Digraph> tmp(digraph, fn);
 		  /// \sa digraphWriter(const TDGR& digraph, std::ostream& os)
 		  template <typename TDGR>
 		  DigraphWriter<TDGR> digraphWriter(const TDGR& digraph, const char* fn) {
 		    DigraphWriter<TDGR> tmp(digraph, fn);
 		    return tmp;
+		  }
-		  template <typename Graph>
+		  template <typename GR>
 		  class GraphWriter;
 		  template <typename Graph>
 		  GraphWriter<Graph> graphWriter(const Graph& graph,
 		                                 std::ostream& os = std::cout);
 		  template <typename Graph>
 		  GraphWriter<Graph> graphWriter(const Graph& graph, const std::string& fn);
 		  template <typename Graph>
-		  GraphWriter<Graph> graphWriter(const Graph& graph, const char* fn);
+		  template <typename TGR>
 		  GraphWriter<TGR> graphWriter(const TGR& graph, std::ostream& os = std::cout);
 		  template <typename TGR>
 		  GraphWriter<TGR> graphWriter(const TGR& graph, const std::string& fn);
 		  template <typename TGR>
 		  GraphWriter<TGR> graphWriter(const TGR& graph, const char* fn);
 		  /// \ingroup lemon_io
 		  ///
@@ -979,7 +1004,7 @@
 		  public:
 		    typedef GR Graph;
-		    TEMPLATE_GRAPH_TYPEDEFS(Graph);
+		    TEMPLATE_GRAPH_TYPEDEFS(GR);
 		  private:
@@ -987,7 +1012,7 @@
 		    std::ostream* _os;
 		    bool local_os;
-		    const Graph& _graph;
+		    const GR& _graph;
 		    std::string _nodes_caption;
 		    std::string _edges_caption;
@@ -1019,7 +1044,7 @@
 		    ///
 		    /// Construct a directed graph writer, which writes to the given
 		    /// output stream.
-		    GraphWriter(const Graph& graph, std::ostream& os = std::cout)
+		    GraphWriter(const GR& graph, std::ostream& os = std::cout)
 		      : _os(&os), local_os(false), _graph(graph),
 		        _skip_nodes(false), _skip_edges(false) {}
@@ -1027,7 +1052,7 @@
 		    ///
 		    /// Construct a directed graph writer, which writes to the given
 		    /// output file.
-		    GraphWriter(const Graph& graph, const std::string& fn)
+		    GraphWriter(const GR& graph, const std::string& fn)
 		      : _os(new std::ofstream(fn.c_str())), local_os(true), _graph(graph),
 		        _skip_nodes(false), _skip_edges(false) {
 		      if (!(*_os)) {
@@ -1040,7 +1065,7 @@
 		    ///
 		    /// Construct a directed graph writer, which writes to the given
 		    /// output file.
-		    GraphWriter(const Graph& graph, const char* fn)
+		    GraphWriter(const GR& graph, const char* fn)
 		      : _os(new std::ofstream(fn)), local_os(true), _graph(graph),
 		        _skip_nodes(false), _skip_edges(false) {
 		      if (!(*_os)) {
@@ -1073,15 +1098,13 @@
 		  private:
 		    template <typename Graph>
 		    friend GraphWriter<Graph> graphWriter(const Graph& graph,
 		                                          std::ostream& os);
 		    template <typename Graph>
-		    friend GraphWriter<Graph> graphWriter(const Graph& graph,
+		    template <typename TGR>
 		    friend GraphWriter<TGR> graphWriter(const TGR& graph, std::ostream& os);
 		    template <typename TGR>
 		    friend GraphWriter<TGR> graphWriter(const TGR& graph,
 		                                          const std::string& fn);
 		    template <typename Graph>
 		    friend GraphWriter<Graph> graphWriter(const Graph& graph,
-		                                          const char *fn);
+		    template <typename TGR>
 		    friend GraphWriter<TGR> graphWriter(const TGR& graph, const char *fn);
 		    GraphWriter(GraphWriter& other)
 		      : _os(other._os), local_os(other.local_os), _graph(other._graph),
@@ -1168,10 +1191,10 @@
 		    GraphWriter& arcMap(const std::string& caption, const Map& map) {
 		      checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>();
 		      _writer_bits::MapStorageBase<Edge>* forward_storage =
-		        new _writer_bits::GraphArcMapStorage<Graph, true, Map>(_graph, map);
+		        new _writer_bits::GraphArcMapStorage<GR, true, Map>(_graph, map);
 		      _edge_maps.push_back(std::make_pair('+' + caption, forward_storage));
 		      _writer_bits::MapStorageBase<Edge>* backward_storage =
-		        new _writer_bits::GraphArcMapStorage<Graph, false, Map>(_graph, map);
+		        new _writer_bits::GraphArcMapStorage<GR, false, Map>(_graph, map);
 		      _edge_maps.push_back(std::make_pair('-' + caption, backward_storage));
 		      return *this;
+		    }
@@ -1185,11 +1208,11 @@
 		                          const Converter& converter = Converter()) {
 		      checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>();
 		      _writer_bits::MapStorageBase<Edge>* forward_storage =
-		        new _writer_bits::GraphArcMapStorage<Graph, true, Map, Converter>
+		        new _writer_bits::GraphArcMapStorage<GR, true, Map, Converter>
 		        (_graph, map, converter);
 		      _edge_maps.push_back(std::make_pair('+' + caption, forward_storage));
 		      _writer_bits::MapStorageBase<Edge>* backward_storage =
-		        new _writer_bits::GraphArcMapStorage<Graph, false, Map, Converter>
+		        new _writer_bits::GraphArcMapStorage<GR, false, Map, Converter>
 		        (_graph, map, converter);
 		      _edge_maps.push_back(std::make_pair('-' + caption, backward_storage));
 		      return *this;
@@ -1247,7 +1270,7 @@
 		    ///
 		    /// Add an arc writing rule to writer.
 		    GraphWriter& arc(const std::string& caption, const Arc& arc) {
-		      typedef _writer_bits::GraphArcLookUpConverter<Graph> Converter;
+		      typedef _writer_bits::GraphArcLookUpConverter<GR> Converter;
 		      Converter converter(_graph, _edge_index);
 		      _writer_bits::ValueStorageBase* storage =
 		        new _writer_bits::ValueStorage<Arc, Converter>(arc, converter);
@@ -1338,8 +1361,8 @@
+		      }
 		      if (label == 0) {
 		        IdMap<Graph, Node> id_map(_graph);
 		        _writer_bits::MapLess<IdMap<Graph, Node> > id_less(id_map);
 		        IdMap<GR, Node> id_map(_graph);
 		        _writer_bits::MapLess<IdMap<GR, Node> > id_less(id_map);
 		        std::sort(nodes.begin(), nodes.end(), id_less);
 		      } else {
 		        label->sort(nodes);
@@ -1423,8 +1446,8 @@
+		      }
 		      if (label == 0) {
 		        IdMap<Graph, Edge> id_map(_graph);
 		        _writer_bits::MapLess<IdMap<Graph, Edge> > id_less(id_map);
 		        IdMap<GR, Edge> id_map(_graph);
 		        _writer_bits::MapLess<IdMap<GR, Edge> > id_less(id_map);
 		        std::sort(edges.begin(), edges.end(), id_less);
 		      } else {
 		        label->sort(edges);
@@ -1529,14 +1552,37 @@
 		    /// @}
 		  };
 		  /// \ingroup lemon_io
 		  ///
 		  /// \brief Return a \ref GraphWriter class
 		  ///
 		  /// This function just returns a \ref GraphWriter class.
 		  ///
 		  /// With this function a graph can be write to a file or output
 		  /// stream in \ref lgf-format "LGF" format with several maps and
 		  /// attributes. For example, with the following code a weighted
 		  /// matching problem can be written to the standard output, i.e. a
 		  /// graph with a \e weight map on the edges:
 		  ///
 		  ///\code
 		  ///ListGraph graph;
 		  ///ListGraph::EdgeMap<int> weight(graph);
 		  ///  // Setting the weight map
 		  ///graphWriter(graph, std::cout).
 		  ///  edgeMap("weight", weight).
 		  ///  run();
 		  ///\endcode
 		  ///
 		  /// For a complete documentation, please see the \ref GraphWriter
 		  /// class documentation.
 		  /// \warning Don't forget to put the \ref GraphWriter::run() "run()"
 		  /// to the end of the parameter list.
 		  /// \relates GraphWriter
 		  template <typename Graph>
 		  GraphWriter<Graph> graphWriter(const Graph& graph,
 		                                 std::ostream& os) {
 		    GraphWriter<Graph> tmp(graph, os);
 		  /// \sa graphWriter(const TGR& graph, const std::string& fn)
 		  /// \sa graphWriter(const TGR& graph, const char* fn)
 		  template <typename TGR>
 		  GraphWriter<TGR> graphWriter(const TGR& graph, std::ostream& os) {
 		    GraphWriter<TGR> tmp(graph, os);
 		    return tmp;
+		  }
@@ -1544,9 +1590,10 @@
 		  ///
 		  /// This function just returns a \ref GraphWriter class.
 		  /// \relates GraphWriter
 		  template <typename Graph>
 		  GraphWriter<Graph> graphWriter(const Graph& graph, const std::string& fn) {
-		    GraphWriter<Graph> tmp(graph, fn);
+		  /// \sa graphWriter(const TGR& graph, std::ostream& os)
 		  template <typename TGR>
 		  GraphWriter<TGR> graphWriter(const TGR& graph, const std::string& fn) {
 		    GraphWriter<TGR> tmp(graph, fn);
 		    return tmp;
+		  }
@@ -1554,9 +1601,10 @@
 		  ///
 		  /// This function just returns a \ref GraphWriter class.
 		  /// \relates GraphWriter
 		  template <typename Graph>
 		  GraphWriter<Graph> graphWriter(const Graph& graph, const char* fn) {
-		    GraphWriter<Graph> tmp(graph, fn);
+		  /// \sa graphWriter(const TGR& graph, std::ostream& os)
 		  template <typename TGR>
 		  GraphWriter<TGR> graphWriter(const TGR& graph, const char* fn) {
 		    GraphWriter<TGR> tmp(graph, fn);
 		    return tmp;
+		  }
@@ -1746,10 +1794,18 @@
 		  };
 		  /// \ingroup lemon_io
 		  ///
 		  /// \brief Return a \ref SectionWriter class
 		  ///
 		  /// This function just returns a \ref SectionWriter class.
 		  ///
 		  /// Please see SectionWriter documentation about the custom section
 		  /// output.
 		  ///
 		  /// \relates SectionWriter
 		  /// \sa sectionWriter(const std::string& fn)
 		  /// \sa sectionWriter(const char *fn)
 		  inline SectionWriter sectionWriter(std::ostream& os) {
 		    SectionWriter tmp(os);
 		    return tmp;
@@ -1759,6 +1815,7 @@
 		  ///
 		  /// This function just returns a \ref SectionWriter class.
 		  /// \relates SectionWriter
 		  /// \sa sectionWriter(std::ostream& os)
 		  inline SectionWriter sectionWriter(const std::string& fn) {
 		    SectionWriter tmp(fn);
 		    return tmp;
@@ -1768,6 +1825,7 @@
 		  ///
 		  /// This function just returns a \ref SectionWriter class.
 		  /// \relates SectionWriter
 		  /// \sa sectionWriter(std::ostream& os)
 		  inline SectionWriter sectionWriter(const char* fn) {
 		    SectionWriter tmp(fn);
 		    return tmp;

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