Changes in / [644:2ca0cdb5f366:646:f63e87b9748e] in lemon

Location:

lemon

Files:

• lgf_reader.h (modified) (27 diffs)
• lgf_writer.h (modified) (28 diffs)

lemon/lgf_reader.h

@@ -102 +102 @@
     };
 
-    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) {}
@@ -174 +174 @@
     };
 
-    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()) {
@@ -388 +388 @@
   }
 
-  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
@@ -420 +419 @@
   ///
   ///\code
-  /// DigraphReader<Digraph>(digraph, std::cin).
+  /// DigraphReader<DGR>(digraph, std::cin).
   ///   nodeMap("coordinates", coord_map).
   ///   arcMap("capacity", cap_map).
@@ -449 +448 @@
   /// 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;
@@ -463 +462 @@
     std::string _filename;
 
-    Digraph& _digraph;
+    DGR& _digraph;
 
     std::string _nodes_caption;
@@ -501 +500 @@
     /// 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),
@@ -510 +509 @@
     /// 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),
@@ -525 +524 @@
     /// 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),
@@ -561 +560 @@
   private:
 
-    template <typename DGR>
-    friend DigraphReader<DGR> digraphReader(DGR& digraph, std::istream& is);
-    template <typename DGR>
-    friend DigraphReader<DGR> digraphReader(DGR& 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, std::istream& is);
+    template <typename TDGR>
+    friend DigraphReader<TDGR> digraphReader(TDGR& digraph, 
+                                             const std::string& fn);
+    template <typename TDGR>
+    friend DigraphReader<TDGR> digraphReader(TDGR& digraph, const char *fn);
 
     DigraphReader(DigraphReader& other)
@@ -1189 +1188 @@
 
   };
+  
+  /// \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
@@ -1194 +1230 @@
   /// 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;
   }
@@ -1204 +1241 @@
   /// 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
@@ -1255 +1281 @@
   private:
 
-    TEMPLATE_GRAPH_TYPEDEFS(Graph);
+    TEMPLATE_GRAPH_TYPEDEFS(GR);
 
     std::istream* _is;
@@ -1261 +1287 @@
     std::string _filename;
 
-    Graph& _graph;
+    GR& _graph;
 
     std::string _nodes_caption;
@@ -1299 +1325 @@
     /// 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),
@@ -1308 +1334 @@
     /// 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),
@@ -1323 +1349 @@
     /// 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),
@@ -1358 +1384 @@
 
   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)
@@ -1455 +1481 @@
       _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;
@@ -1469 +1495 @@
       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));
@@ -1531 +1557 @@
     /// 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 =
@@ -2034 +2060 @@
   };
 
+  /// \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;
   }
@@ -2048 +2108 @@
   /// 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;
   }
@@ -2317 +2368 @@
   };
 
+  /// \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);
@@ -2330 +2389 @@
   /// This function just returns a \ref SectionReader class.
   /// \relates SectionReader
+  /// \sa sectionReader(std::istream& is)
   inline SectionReader sectionReader(const std::string& fn) {
     SectionReader tmp(fn);
@@ -2339 +2399 @@
   /// This function just returns a \ref SectionReader class.
   /// \relates SectionReader
+  /// \sa sectionReader(std::istream& is)
   inline SectionReader sectionReader(const char* fn) {
     SectionReader tmp(fn);

lemon/lgf_writer.h

@@ -348 +348 @@
   }
 
-  template <typename Digraph>
+  template <typename DGR>
   class DigraphWriter;
 
-  template <typename Digraph>
-  DigraphWriter<Digraph> digraphWriter(const Digraph& digraph,
-                                       std::ostream& os = std::cout);
-  template <typename Digraph>
-  DigraphWriter<Digraph> digraphWriter(const Digraph& 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, 
+                                   std::ostream& os = std::cout);
+  template <typename TDGR>
+  DigraphWriter<TDGR> digraphWriter(const TDGR& digraph, const std::string& fn);
+
+  template <typename TDGR>
+  DigraphWriter<TDGR> digraphWriter(const TDGR& digraph, const char* fn);
 
 
@@ -382 +380 @@
   ///
   ///\code
-  /// DigraphWriter<Digraph>(digraph, std::cout).
+  /// DigraphWriter<DGR>(digraph, std::cout).
   ///   nodeMap("coordinates", coord_map).
   ///   nodeMap("size", size).
@@ -407 +405 @@
   /// 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:
@@ -420 +418 @@
     bool local_os;
 
-    const Digraph& _digraph;
+    const DGR& _digraph;
 
     std::string _nodes_caption;
@@ -452 +450 @@
     /// 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) {}
@@ -460 +458 @@
     /// 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) {
@@ -473 +471 @@
     /// 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) {
@@ -506 +504 @@
   private:
 
-    template <typename DGR>
-    friend DigraphWriter<DGR> digraphWriter(const DGR& digraph, 
-                                            std::ostream& os);
-    template <typename DGR>
-    friend DigraphWriter<DGR> digraphWriter(const DGR& digraph,
-                                            const std::string& fn);
-    template <typename DGR>
-    friend DigraphWriter<DGR> digraphWriter(const DGR& digraph,
-                                            const char *fn);
+    template <typename TDGR>
+    friend DigraphWriter<TDGR> digraphWriter(const TDGR& digraph, 
+                                             std::ostream& os);
+    template <typename TDGR>
+    friend DigraphWriter<TDGR> digraphWriter(const TDGR& digraph,
+                                             const std::string& fn);
+    template <typename TDGR>
+    friend DigraphWriter<TDGR> digraphWriter(const TDGR& digraph,
+                                             const char *fn);
 
     DigraphWriter(DigraphWriter& other)
@@ -725 +723 @@
 
       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 {
@@ -810 +808 @@
 
       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 {
@@ -916 +914 @@
   };
 
+  /// \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
+  /// \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;
+  }
+
   /// \brief Return a \ref DigraphWriter class
   ///
   /// This function just returns a \ref DigraphWriter class.
   /// \relates DigraphWriter
-  template <typename Digraph>
-  DigraphWriter<Digraph> digraphWriter(const Digraph& digraph,
-                                       std::ostream& os) {
-    DigraphWriter<Digraph> tmp(digraph, os);
+  /// \sa digraphWriter(const TDGR& digraph, std::ostream& os)
+  template <typename TDGR>
+  DigraphWriter<TDGR> digraphWriter(const TDGR& digraph, 
+                                    const std::string& fn) {
+    DigraphWriter<TDGR> tmp(digraph, fn);
     return tmp;
   }
@@ -931 +968 @@
   /// This function just returns a \ref DigraphWriter class.
   /// \relates DigraphWriter
-  template <typename Digraph>
-  DigraphWriter<Digraph> digraphWriter(const Digraph& digraph,
-                                       const std::string& 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;
   }
 
-  /// \brief Return a \ref DigraphWriter class
-  ///
-  /// 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);
-    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
@@ -980 +1005 @@
 
     typedef GR Graph;
-    TEMPLATE_GRAPH_TYPEDEFS(Graph);
+    TEMPLATE_GRAPH_TYPEDEFS(GR);
 
   private:
@@ -988 +1013 @@
     bool local_os;
 
-    const Graph& _graph;
+    const GR& _graph;
 
     std::string _nodes_caption;
@@ -1020 +1045 @@
     /// 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) {}
@@ -1028 +1053 @@
     /// 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) {
@@ -1041 +1066 @@
     /// 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) {
@@ -1074 +1099 @@
   private:
 
-    template <typename Graph>
-    friend GraphWriter<Graph> graphWriter(const Graph& graph,
-                                          std::ostream& os);
-    template <typename Graph>
-    friend GraphWriter<Graph> graphWriter(const Graph& 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, std::ostream& os);
+    template <typename TGR>
+    friend GraphWriter<TGR> graphWriter(const TGR& graph, 
+                                        const std::string& fn);
+    template <typename TGR>
+    friend GraphWriter<TGR> graphWriter(const TGR& graph, const char *fn);
     
     GraphWriter(GraphWriter& other)
@@ -1169 +1192 @@
       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;
@@ -1186 +1209 @@
       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));
@@ -1248 +1271 @@
     /// 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 =
@@ -1339 +1362 @@
 
       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 {
@@ -1424 +1447 @@
 
       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 {
@@ -1530 +1553 @@
   };
 
+  /// \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
+  /// \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;
+  }
+
   /// \brief Return a \ref GraphWriter class
   ///
   /// This function just returns a \ref GraphWriter class.
   /// \relates GraphWriter
-  template <typename Graph>
-  GraphWriter<Graph> graphWriter(const Graph& graph,
-                                 std::ostream& os) {
-    GraphWriter<Graph> tmp(graph, os);
+  /// \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;
   }
@@ -1545 +1602 @@
   /// 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);
-    return tmp;
-  }
-
-  /// \brief Return a \ref GraphWriter class
-  ///
-  /// 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;
   }
@@ -1747 +1795 @@
   };
 
+  /// \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);
@@ -1760 +1816 @@
   /// 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);
@@ -1769 +1826 @@
   /// This function just returns a \ref SectionWriter class.
   /// \relates SectionWriter
+  /// \sa sectionWriter(std::ostream& os)
   inline SectionWriter sectionWriter(const char* fn) {
     SectionWriter tmp(fn);