LEMON/LEMON-official Changeset - r294:cbe3ec2d59d2

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Changeset - r294:cbe3ec2d59d2

« 292:e7af73
« 293:47fbc8

296:9768e6 »
295:7c796c »

r294:cbe3ec2d59d2

Wed, 01 Oct 2008 13:56:40

[Not Reviewed]

0 comments (0 inline)

alpar (Alpar Juttner)
alpar@cs.elte.hu

Merge

0 11 0

merge default

3 files changed with 388 insertions and 522 deletions:

demo/lgf_demo.cc

lemon/arg_parser.h

lemon/bfs.h

lemon/concepts/heap.h

lemon/dfs.h

lemon/dijkstra.h

lemon/error.h

199

341

lemon/graph_to_eps.h

lemon/lgf_reader.h

120

lemon/lgf_writer.h

↑ Collapse diff ↑

demo/lgf_demo.cc

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		///\ingroup demos
 		///\file
 		///\brief Demonstrating graph input and output
 		///
 		/// This program gives an example of how to read and write a digraph
 		/// and additional maps from/to a stream or a file using the
 		/// \ref lgf-format "LGF" format.
 		///
 		/// The \c "digraph.lgf" file:
 		/// \include digraph.lgf
 		///
 		/// And the program which reads it and prints the digraph to the
 		/// standard output:
 		/// \include lgf_demo.cc
 		#include <iostream>
 		#include <lemon/smart_graph.h>
 		#include <lemon/lgf_reader.h>
 		#include <lemon/lgf_writer.h>
 		using namespace lemon;
 		int main() {
 		  SmartDigraph g;
 		  SmartDigraph::ArcMap<int> cap(g);
 		  SmartDigraph::Node s, t;
 		  try {
 		    digraphReader(g, "digraph.lgf"). // read the directed graph into g
 		      arcMap("capacity", cap).       // read the 'capacity' arc map into cap
 		      node("source", s).             // read 'source' node to s
 		      node("target", t).             // read 'target' node to t
 		      run();
-		  } catch (DataFormatError& error) { // check if there was any error
+		  } catch (Exception& error) { // check if there was any error
 		    std::cerr << "Error: " << error.what() << std::endl;
 		    return -1;
+		  }
 		  std::cout << "A digraph is read from 'digraph.lgf'." << std::endl;
 		  std::cout << "Number of nodes: " << countNodes(g) << std::endl;
 		  std::cout << "Number of arcs: " << countArcs(g) << std::endl;
 		  std::cout << "We can write it to the standard output:" << std::endl;
 		  digraphWriter(g).                // write g to the standard output
 		    arcMap("capacity", cap).       // write cap into 'capacity'
 		    node("source", s).             // write s to 'source'
 		    node("target", t).             // write t to 'target'
 		    run();
 		  return 0;
+		}

lemon/arg_parser.h

Show inline comments

@@ -217,169 +217,170 @@
 		    ///\param name The name of the option. The leading '-' must be omitted.
 		    ///\param help A help string.
 		    ///\param obl Indicate if the option is mandatory.
 		    ///\retval ref The value of the argument will be written to this variable.
 		    ///\note A mandatory bool obtion is of very little use.
 		    ArgParser &refOption(const std::string &name,
 		                      const std::string &help,
 		                      bool &ref, bool obl=false);
 		    ///Add a new string type option with a storage reference
 		    ///Add a new string type option with a storage reference.
 		    ///\param name The name of the option. The leading '-' must be omitted.
 		    ///\param help A help string.
 		    ///\param obl Indicate if the option is mandatory.
 		    ///\retval ref The value of the argument will be written to this variable.
 		    ArgParser &refOption(const std::string &name,
 		                      const std::string &help,
 		                      std::string &ref, bool obl=false);
 		    ///@}
 		    ///\name Option Groups and Synonyms
 		    ///
 		    ///@{
 		    ///Bundle some options into a group
 		    /// You can group some option by calling this function repeatedly for each
 		    /// option to be grouped with the same groupname.
 		    ///\param group The group name.
 		    ///\param opt The option name.
 		    ArgParser &optionGroup(const std::string &group,
 		                           const std::string &opt);
 		    ///Make the members of a group exclusive
 		    ///If you call this function for a group, than at most one of them can be
 		    ///given at the same time.
 		    ArgParser &onlyOneGroup(const std::string &group);
 		    ///Make a group mandatory
 		    ///Using this function, at least one of the members of \c group
 		    ///must be given.
 		    ArgParser &mandatoryGroup(const std::string &group);
 		    ///Create synonym to an option
 		    ///With this function you can create a synonym \c syn of the
 		    ///option \c opt.
 		    ArgParser &synonym(const std::string &syn,
 		                           const std::string &opt);
 		    ///@}
 		  private:
 		    void show(std::ostream &os,Opts::const_iterator i) const;
 		    void show(std::ostream &os,Groups::const_iterator i) const;
 		    void showHelp(Opts::const_iterator i) const;
 		    void showHelp(std::vector<OtherArg>::const_iterator i) const;
 		    void unknownOpt(std::string arg) const;
 		    void requiresValue(std::string arg, OptType t) const;
 		    void checkMandatories() const;
 		    void shortHelp() const;
 		    void showHelp() const;
 		  public:
 		    ///Start the parsing process
 		    ArgParser &parse();
 		    /// Synonym for parse()
 		    ArgParser &run()
+		    {
 		      return parse();
+		    }
 		    ///Give back the command name (the 0th argument)
 		    const std::string &commandName() const { return _command_name; }
 		    ///Check if an opion has been given to the command.
 		    bool given(std::string op) const
+		    {
 		      Opts::const_iterator i = _opts.find(op);
 		      return i!=_opts.end()?i->second.set:false;
+		    }
 		    ///Magic type for operator[]
 		    ///This is the type of the return value of ArgParser::operator[]().
 		    ///It automatically converts to \c int, \c double, \c bool or
 		    ///\c std::string if the type of the option matches, otherwise it
 		    ///throws an exception (i.e. it performs runtime type checking).
 		    ///\c std::string if the type of the option matches, which is checked
 		    ///with an \ref LEMON_ASSERT "assertion" (i.e. it performs runtime
 		    ///type checking).
 		    class RefType
+		    {
 		      const ArgParser &_parser;
 		      std::string _name;
 		    public:
 		      ///\e
 		      RefType(const ArgParser &p,const std::string &n) :_parser(p),_name(n) {}
 		      ///\e
 		      operator bool()
+		      {
 		        Opts::const_iterator i = _parser._opts.find(_name);
 		        LEMON_ASSERT(i!=_parser._opts.end(),
 		                     std::string()+"Unkown option: '"+_name+"'");
 		        LEMON_ASSERT(i->second.type==ArgParser::BOOL,
 		                     std::string()+"'"+_name+"' is a bool option");
 		        return *(i->second.bool_p);
+		      }
 		      ///\e
 		      operator std::string()
+		      {
 		        Opts::const_iterator i = _parser._opts.find(_name);
 		        LEMON_ASSERT(i!=_parser._opts.end(),
 		                     std::string()+"Unkown option: '"+_name+"'");
 		        LEMON_ASSERT(i->second.type==ArgParser::STRING,
 		                     std::string()+"'"+_name+"' is a string option");
 		        return *(i->second.string_p);
+		      }
 		      ///\e
 		      operator double()
+		      {
 		        Opts::const_iterator i = _parser._opts.find(_name);
 		        LEMON_ASSERT(i!=_parser._opts.end(),
 		                     std::string()+"Unkown option: '"+_name+"'");
 		        LEMON_ASSERT(i->second.type==ArgParser::DOUBLE ||
 		                     i->second.type==ArgParser::INTEGER,
 		                     std::string()+"'"+_name+"' is a floating point option");
 		        return i->second.type==ArgParser::DOUBLE ?
 		          *(i->second.double_p) : *(i->second.int_p);
+		      }
 		      ///\e
 		      operator int()
+		      {
 		        Opts::const_iterator i = _parser._opts.find(_name);
 		        LEMON_ASSERT(i!=_parser._opts.end(),
 		                     std::string()+"Unkown option: '"+_name+"'");
 		        LEMON_ASSERT(i->second.type==ArgParser::INTEGER,
 		                     std::string()+"'"+_name+"' is an integer option");
 		        return *(i->second.int_p);
+		      }
 		    };
 		    ///Give back the value of an option
 		    ///Give back the value of an option.
 		    ///\sa RefType
 		    RefType operator[](const std::string &n) const
+		    {
 		      return RefType(*this, n);
+		    }
 		    ///Give back the non-option type arguments.
 		    ///Give back a reference to a vector consisting of the program arguments
 		    ///not starting with a '-' character.
 		    const std::vector<std::string> &files() const { return _file_args; }
 		  };
+		}
 		#endif // LEMON_ARG_PARSER_H

lemon/bfs.h

Show inline comments

@@ -42,361 +42,356 @@
 		    ///The type of the digraph the algorithm runs on.
 		    typedef GR Digraph;
 		    ///\brief The type of the map that stores the predecessor
 		    ///arcs of the shortest paths.
 		    ///
 		    ///The type of the map that stores the predecessor
 		    ///arcs of the shortest paths.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    typedef typename Digraph::template NodeMap<typename Digraph::Arc> PredMap;
 		    ///Instantiates a \ref PredMap.
 		    ///This function instantiates a \ref PredMap.
 		    ///\param g is the digraph, to which we would like to define the
 		    ///\ref PredMap.
 		    static PredMap *createPredMap(const Digraph &g)
+		    {
 		      return new PredMap(g);
+		    }
 		    ///The type of the map that indicates which nodes are processed.
 		    ///The type of the map that indicates which nodes are processed.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    typedef NullMap<typename Digraph::Node,bool> ProcessedMap;
 		    ///Instantiates a \ref ProcessedMap.
 		    ///This function instantiates a \ref ProcessedMap.
 		    ///\param g is the digraph, to which
 		    ///we would like to define the \ref ProcessedMap
 		#ifdef DOXYGEN
 		    static ProcessedMap *createProcessedMap(const Digraph &g)
 		#else
 		    static ProcessedMap *createProcessedMap(const Digraph &)
 		#endif
+		    {
 		      return new ProcessedMap();
+		    }
 		    ///The type of the map that indicates which nodes are reached.
 		    ///The type of the map that indicates which nodes are reached.
 		    ///It must meet the \ref concepts::ReadWriteMap "ReadWriteMap" concept.
 		    typedef typename Digraph::template NodeMap<bool> ReachedMap;
 		    ///Instantiates a \ref ReachedMap.
 		    ///This function instantiates a \ref ReachedMap.
 		    ///\param g is the digraph, to which
 		    ///we would like to define the \ref ReachedMap.
 		    static ReachedMap *createReachedMap(const Digraph &g)
+		    {
 		      return new ReachedMap(g);
+		    }
 		    ///The type of the map that stores the distances of the nodes.
 		    ///The type of the map that stores the distances of the nodes.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    typedef typename Digraph::template NodeMap<int> DistMap;
 		    ///Instantiates a \ref DistMap.
 		    ///This function instantiates a \ref DistMap.
 		    ///\param g is the digraph, to which we would like to define the
 		    ///\ref DistMap.
 		    static DistMap *createDistMap(const Digraph &g)
+		    {
 		      return new DistMap(g);
+		    }
 		  };
 		  ///%BFS algorithm class.
 		  ///\ingroup search
 		  ///This class provides an efficient implementation of the %BFS algorithm.
 		  ///
 		  ///There is also a \ref bfs() "function-type interface" for the BFS
 		  ///algorithm, which is convenient in the simplier cases and it can be
 		  ///used easier.
 		  ///
 		  ///\tparam GR The type of the digraph the algorithm runs on.
 		  ///The default value is \ref ListDigraph. The value of GR is not used
 		  ///directly by \ref Bfs, it is only passed to \ref BfsDefaultTraits.
 		  ///\tparam TR Traits class to set various data types used by the algorithm.
 		  ///The default traits class is
 		  ///\ref BfsDefaultTraits "BfsDefaultTraits<GR>".
 		  ///See \ref BfsDefaultTraits for the documentation of
 		  ///a Bfs traits class.
 		#ifdef DOXYGEN
 		  template <typename GR,
 		            typename TR>
 		#else
 		  template <typename GR=ListDigraph,
 		            typename TR=BfsDefaultTraits<GR> >
 		#endif
 		  class Bfs {
 		  public:
 		    ///\ref Exception for uninitialized parameters.
 		    ///This error represents problems in the initialization of the
 		    ///parameters of the algorithm.
 		    class UninitializedParameter : public lemon::UninitializedParameter {
 		    public:
 		      virtual const char* what() const throw() {
 		        return "lemon::Bfs::UninitializedParameter";
+		      }
 		    };
 		    ///The type of the digraph the algorithm runs on.
 		    typedef typename TR::Digraph Digraph;
 		    ///\brief The type of the map that stores the predecessor arcs of the
 		    ///shortest paths.
 		    typedef typename TR::PredMap PredMap;
 		    ///The type of the map that stores the distances of the nodes.
 		    typedef typename TR::DistMap DistMap;
 		    ///The type of the map that indicates which nodes are reached.
 		    typedef typename TR::ReachedMap ReachedMap;
 		    ///The type of the map that indicates which nodes are processed.
 		    typedef typename TR::ProcessedMap ProcessedMap;
 		    ///The type of the paths.
 		    typedef PredMapPath<Digraph, PredMap> Path;
 		    ///The traits class.
 		    typedef TR Traits;
 		  private:
 		    typedef typename Digraph::Node Node;
 		    typedef typename Digraph::NodeIt NodeIt;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::OutArcIt OutArcIt;
 		    //Pointer to the underlying digraph.
 		    const Digraph *G;
 		    //Pointer to the map of predecessor arcs.
 		    PredMap *_pred;
 		    //Indicates if _pred is locally allocated (true) or not.
 		    bool local_pred;
 		    //Pointer to the map of distances.
 		    DistMap *_dist;
 		    //Indicates if _dist is locally allocated (true) or not.
 		    bool local_dist;
 		    //Pointer to the map of reached status of the nodes.
 		    ReachedMap *_reached;
 		    //Indicates if _reached is locally allocated (true) or not.
 		    bool local_reached;
 		    //Pointer to the map of processed status of the nodes.
 		    ProcessedMap *_processed;
 		    //Indicates if _processed is locally allocated (true) or not.
 		    bool local_processed;
 		    std::vector<typename Digraph::Node> _queue;
 		    int _queue_head,_queue_tail,_queue_next_dist;
 		    int _curr_dist;
 		    //Creates the maps if necessary.
 		    void create_maps()
+		    {
 		      if(!_pred) {
 		        local_pred = true;
 		        _pred = Traits::createPredMap(*G);
+		      }
 		      if(!_dist) {
 		        local_dist = true;
 		        _dist = Traits::createDistMap(*G);
+		      }
 		      if(!_reached) {
 		        local_reached = true;
 		        _reached = Traits::createReachedMap(*G);
+		      }
 		      if(!_processed) {
 		        local_processed = true;
 		        _processed = Traits::createProcessedMap(*G);
+		      }
+		    }
 		  protected:
 		    Bfs() {}
 		  public:
 		    typedef Bfs Create;
 		    ///\name Named template parameters
 		    ///@{
 		    template <class T>
 		    struct SetPredMapTraits : public Traits {
 		      typedef T PredMap;
 		      static PredMap *createPredMap(const Digraph &)
+		      {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "PredMap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref PredMap type.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref PredMap type.
 		    template <class T>
 		    struct SetPredMap : public Bfs< Digraph, SetPredMapTraits<T> > {
 		      typedef Bfs< Digraph, SetPredMapTraits<T> > Create;
 		    };
 		    template <class T>
 		    struct SetDistMapTraits : public Traits {
 		      typedef T DistMap;
 		      static DistMap *createDistMap(const Digraph &)
+		      {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "DistMap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref DistMap type.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref DistMap type.
 		    template <class T>
 		    struct SetDistMap : public Bfs< Digraph, SetDistMapTraits<T> > {
 		      typedef Bfs< Digraph, SetDistMapTraits<T> > Create;
 		    };
 		    template <class T>
 		    struct SetReachedMapTraits : public Traits {
 		      typedef T ReachedMap;
 		      static ReachedMap *createReachedMap(const Digraph &)
+		      {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "ReachedMap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref ReachedMap type.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref ReachedMap type.
 		    template <class T>
 		    struct SetReachedMap : public Bfs< Digraph, SetReachedMapTraits<T> > {
 		      typedef Bfs< Digraph, SetReachedMapTraits<T> > Create;
 		    };
 		    template <class T>
 		    struct SetProcessedMapTraits : public Traits {
 		      typedef T ProcessedMap;
 		      static ProcessedMap *createProcessedMap(const Digraph &)
+		      {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "ProcessedMap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref ProcessedMap type.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref ProcessedMap type.
 		    template <class T>
 		    struct SetProcessedMap : public Bfs< Digraph, SetProcessedMapTraits<T> > {
 		      typedef Bfs< Digraph, SetProcessedMapTraits<T> > Create;
 		    };
 		    struct SetStandardProcessedMapTraits : public Traits {
 		      typedef typename Digraph::template NodeMap<bool> ProcessedMap;
 		      static ProcessedMap *createProcessedMap(const Digraph &g)
+		      {
 		        return new ProcessedMap(g);
 		        return 0; // ignore warnings
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref ProcessedMap type to be <tt>Digraph::NodeMap<bool></tt>.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref ProcessedMap type to be <tt>Digraph::NodeMap<bool></tt>.
 		    ///If you don't set it explicitly, it will be automatically allocated.
 		    struct SetStandardProcessedMap :
 		      public Bfs< Digraph, SetStandardProcessedMapTraits > {
 		      typedef Bfs< Digraph, SetStandardProcessedMapTraits > Create;
 		    };
 		    ///@}
 		  public:
 		    ///Constructor.
 		    ///Constructor.
 		    ///\param g The digraph the algorithm runs on.
 		    Bfs(const Digraph &g) :
 		      G(&g),
 		      _pred(NULL), local_pred(false),
 		      _dist(NULL), local_dist(false),
 		      _reached(NULL), local_reached(false),
 		      _processed(NULL), local_processed(false)
 		    { }
 		    ///Destructor.
 		    ~Bfs()
+		    {
 		      if(local_pred) delete _pred;
 		      if(local_dist) delete _dist;
 		      if(local_reached) delete _reached;
 		      if(local_processed) delete _processed;
+		    }
 		    ///Sets the map that stores the predecessor arcs.
 		    ///Sets the map that stores the predecessor arcs.
 		    ///If you don't use this function before calling \ref run(),
 		    ///it will allocate one. The destructor deallocates this
 		    ///automatically allocated map, of course.
 		    ///\return <tt> (*this) </tt>
 		    Bfs &predMap(PredMap &m)
+		    {
 		      if(local_pred) {
 		        delete _pred;
 		        local_pred=false;
+		      }
 		      _pred = &m;
 		      return *this;
+		    }
 		    ///Sets the map that indicates which nodes are reached.
 		    ///Sets the map that indicates which nodes are reached.
 		    ///If you don't use this function before calling \ref run(),
 		    ///it will allocate one. The destructor deallocates this
 		    ///automatically allocated map, of course.
 		    ///\return <tt> (*this) </tt>
 		    Bfs &reachedMap(ReachedMap &m)
+		    {
 		      if(local_reached) {
 		        delete _reached;
 		        local_reached=false;
+		      }
 		      _reached = &m;
 		      return *this;
+		    }
 		    ///Sets the map that indicates which nodes are processed.
 		    ///Sets the map that indicates which nodes are processed.
 		    ///If you don't use this function before calling \ref run(),
 		    ///it will allocate one. The destructor deallocates this
 		    ///automatically allocated map, of course.
 		    ///\return <tt> (*this) </tt>
 		    Bfs &processedMap(ProcessedMap &m)
+		    {
 		      if(local_processed) {
 		        delete _processed;
 		        local_processed=false;
+		      }
 		      _processed = &m;
 		      return *this;
+		    }
 		    ///Sets the map that stores the distances of the nodes.
 		    ///Sets the map that stores the distances of the nodes calculated by
 		    ///the algorithm.
 		    ///If you don't use this function before calling \ref run(),
 		    ///it will allocate one. The destructor deallocates this
 		    ///automatically allocated map, of course.
@@ -947,193 +942,192 @@
 		    BfsWizardBase() : _g(0), _reached(0), _processed(0), _pred(0),
 		                      _dist(0), _path(0), _di(0) {}
 		    /// Constructor.
 		    /// This constructor requires one parameter,
 		    /// others are initiated to \c 0.
 		    /// \param g The digraph the algorithm runs on.
 		    BfsWizardBase(const GR &g) :
 		      _g(reinterpret_cast<void*>(const_cast<GR*>(&g))),
 		      _reached(0), _processed(0), _pred(0), _dist(0),  _path(0), _di(0) {}
 		  };
 		  /// Auxiliary class for the function-type interface of BFS algorithm.
 		  /// This auxiliary class is created to implement the
 		  /// \ref bfs() "function-type interface" of \ref Bfs algorithm.
 		  /// It does not have own \ref run() method, it uses the functions
 		  /// and features of the plain \ref Bfs.
 		  ///
 		  /// This class should only be used through the \ref bfs() function,
 		  /// which makes it easier to use the algorithm.
 		  template<class TR>
 		  class BfsWizard : public TR
+		  {
 		    typedef TR Base;
 		    ///The type of the digraph the algorithm runs on.
 		    typedef typename TR::Digraph Digraph;
 		    typedef typename Digraph::Node Node;
 		    typedef typename Digraph::NodeIt NodeIt;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::OutArcIt OutArcIt;
 		    ///\brief The type of the map that stores the predecessor
 		    ///arcs of the shortest paths.
 		    typedef typename TR::PredMap PredMap;
 		    ///\brief The type of the map that stores the distances of the nodes.
 		    typedef typename TR::DistMap DistMap;
 		    ///\brief The type of the map that indicates which nodes are reached.
 		    typedef typename TR::ReachedMap ReachedMap;
 		    ///\brief The type of the map that indicates which nodes are processed.
 		    typedef typename TR::ProcessedMap ProcessedMap;
 		    ///The type of the shortest paths
 		    typedef typename TR::Path Path;
 		  public:
 		    /// Constructor.
 		    BfsWizard() : TR() {}
 		    /// Constructor that requires parameters.
 		    /// Constructor that requires parameters.
 		    /// These parameters will be the default values for the traits class.
 		    /// \param g The digraph the algorithm runs on.
 		    BfsWizard(const Digraph &g) :
 		      TR(g) {}
 		    ///Copy constructor
 		    BfsWizard(const TR &b) : TR(b) {}
 		    ~BfsWizard() {}
 		    ///Runs BFS algorithm from the given source node.
 		    ///This method runs BFS algorithm from node \c s
 		    ///in order to compute the shortest path to each node.
 		    void run(Node s)
+		    {
 		      Bfs<Digraph,TR> alg(*reinterpret_cast<const Digraph*>(Base::_g));
 		      if (Base::_pred)
 		        alg.predMap(*reinterpret_cast<PredMap*>(Base::_pred));
 		      if (Base::_dist)
 		        alg.distMap(*reinterpret_cast<DistMap*>(Base::_dist));
 		      if (Base::_reached)
 		        alg.reachedMap(*reinterpret_cast<ReachedMap*>(Base::_reached));
 		      if (Base::_processed)
 		        alg.processedMap(*reinterpret_cast<ProcessedMap*>(Base::_processed));
 		      if (s!=INVALID)
 		        alg.run(s);
 		      else
 		        alg.run();
+		    }
 		    ///Finds the shortest path between \c s and \c t.
 		    ///This method runs BFS algorithm from node \c s
 		    ///in order to compute the shortest path to node \c t
 		    ///(it stops searching when \c t is processed).
 		    ///
 		    ///\return \c true if \c t is reachable form \c s.
 		    bool run(Node s, Node t)
+		    {
 		      if (s==INVALID || t==INVALID) throw UninitializedParameter();
 		      Bfs<Digraph,TR> alg(*reinterpret_cast<const Digraph*>(Base::_g));
 		      if (Base::_pred)
 		        alg.predMap(*reinterpret_cast<PredMap*>(Base::_pred));
 		      if (Base::_dist)
 		        alg.distMap(*reinterpret_cast<DistMap*>(Base::_dist));
 		      if (Base::_reached)
 		        alg.reachedMap(*reinterpret_cast<ReachedMap*>(Base::_reached));
 		      if (Base::_processed)
 		        alg.processedMap(*reinterpret_cast<ProcessedMap*>(Base::_processed));
 		      alg.run(s,t);
 		      if (Base::_path)
 		        *reinterpret_cast<Path*>(Base::_path) = alg.path(t);
 		      if (Base::_di)
 		        *Base::_di = alg.dist(t);
 		      return alg.reached(t);
+		    }
 		    ///Runs BFS algorithm to visit all nodes in the digraph.
 		    ///This method runs BFS algorithm in order to compute
 		    ///the shortest path to each node.
 		    void run()
+		    {
 		      run(INVALID);
+		    }
 		    template<class T>
 		    struct SetPredMapBase : public Base {
 		      typedef T PredMap;
 		      static PredMap *createPredMap(const Digraph &) { return 0; };
 		      SetPredMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-func-param "Named parameter"
 		    ///for setting \ref PredMap object.
 		    ///
 		    ///\ref named-func-param "Named parameter"
 		    ///for setting \ref PredMap object.
 		    template<class T>
 		    BfsWizard<SetPredMapBase<T> > predMap(const T &t)
+		    {
 		      Base::_pred=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return BfsWizard<SetPredMapBase<T> >(*this);
+		    }
 		    template<class T>
 		    struct SetReachedMapBase : public Base {
 		      typedef T ReachedMap;
 		      static ReachedMap *createReachedMap(const Digraph &) { return 0; };
 		      SetReachedMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-func-param "Named parameter"
 		    ///for setting \ref ReachedMap object.
 		    ///
 		    /// \ref named-func-param "Named parameter"
 		    ///for setting \ref ReachedMap object.
 		    template<class T>
 		    BfsWizard<SetReachedMapBase<T> > reachedMap(const T &t)
+		    {
 		      Base::_reached=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return BfsWizard<SetReachedMapBase<T> >(*this);
+		    }
 		    template<class T>
 		    struct SetDistMapBase : public Base {
 		      typedef T DistMap;
 		      static DistMap *createDistMap(const Digraph &) { return 0; };
 		      SetDistMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-func-param "Named parameter"
 		    ///for setting \ref DistMap object.
 		    ///
 		    /// \ref named-func-param "Named parameter"
 		    ///for setting \ref DistMap object.
 		    template<class T>
 		    BfsWizard<SetDistMapBase<T> > distMap(const T &t)
+		    {
 		      Base::_dist=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return BfsWizard<SetDistMapBase<T> >(*this);
+		    }
 		    template<class T>
 		    struct SetProcessedMapBase : public Base {
 		      typedef T ProcessedMap;
 		      static ProcessedMap *createProcessedMap(const Digraph &) { return 0; };
 		      SetProcessedMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-func-param "Named parameter"
 		    ///for setting \ref ProcessedMap object.
 		    ///
 		    /// \ref named-func-param "Named parameter"
 		    ///for setting \ref ProcessedMap object.
 		    template<class T>
 		    BfsWizard<SetProcessedMapBase<T> > processedMap(const T &t)
+		    {
 		      Base::_processed=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return BfsWizard<SetProcessedMapBase<T> >(*this);
@@ -1230,259 +1224,248 @@
 		    void examine(const Arc& arc) {}
 		  };
 		#else
 		  template <typename _Digraph>
 		  struct BfsVisitor {
 		    typedef _Digraph Digraph;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::Node Node;
 		    void start(const Node&) {}
 		    void reach(const Node&) {}
 		    void process(const Node&) {}
 		    void discover(const Arc&) {}
 		    void examine(const Arc&) {}
 		    template <typename _Visitor>
 		    struct Constraints {
 		      void constraints() {
 		        Arc arc;
 		        Node node;
 		        visitor.start(node);
 		        visitor.reach(node);
 		        visitor.process(node);
 		        visitor.discover(arc);
 		        visitor.examine(arc);
+		      }
 		      _Visitor& visitor;
 		    };
 		  };
 		#endif
 		  /// \brief Default traits class of BfsVisit class.
 		  ///
 		  /// Default traits class of BfsVisit class.
 		  /// \tparam _Digraph The type of the digraph the algorithm runs on.
 		  template<class _Digraph>
 		  struct BfsVisitDefaultTraits {
 		    /// \brief The type of the digraph the algorithm runs on.
 		    typedef _Digraph Digraph;
 		    /// \brief The type of the map that indicates which nodes are reached.
 		    ///
 		    /// The type of the map that indicates which nodes are reached.
 		    /// It must meet the \ref concepts::ReadWriteMap "ReadWriteMap" concept.
 		    typedef typename Digraph::template NodeMap<bool> ReachedMap;
 		    /// \brief Instantiates a \ref ReachedMap.
 		    ///
 		    /// This function instantiates a \ref ReachedMap.
 		    /// \param digraph is the digraph, to which
 		    /// we would like to define the \ref ReachedMap.
 		    static ReachedMap *createReachedMap(const Digraph &digraph) {
 		      return new ReachedMap(digraph);
+		    }
 		  };
 		  /// \ingroup search
 		  ///
 		  /// \brief %BFS algorithm class with visitor interface.
 		  ///
 		  /// This class provides an efficient implementation of the %BFS algorithm
 		  /// with visitor interface.
 		  ///
 		  /// The %BfsVisit class provides an alternative interface to the Bfs
 		  /// class. It works with callback mechanism, the BfsVisit object calls
 		  /// the member functions of the \c Visitor class on every BFS event.
 		  ///
 		  /// This interface of the BFS algorithm should be used in special cases
 		  /// when extra actions have to be performed in connection with certain
 		  /// events of the BFS algorithm. Otherwise consider to use Bfs or bfs()
 		  /// instead.
 		  ///
 		  /// \tparam _Digraph The type of the digraph the algorithm runs on.
 		  /// The default value is
 		  /// \ref ListDigraph. The value of _Digraph is not used directly by
 		  /// \ref BfsVisit, it is only passed to \ref BfsVisitDefaultTraits.
 		  /// \tparam _Visitor The Visitor type that is used by the algorithm.
 		  /// \ref BfsVisitor "BfsVisitor<_Digraph>" is an empty visitor, which
 		  /// does not observe the BFS events. If you want to observe the BFS
 		  /// events, you should implement your own visitor class.
 		  /// \tparam _Traits Traits class to set various data types used by the
 		  /// algorithm. The default traits class is
 		  /// \ref BfsVisitDefaultTraits "BfsVisitDefaultTraits<_Digraph>".
 		  /// See \ref BfsVisitDefaultTraits for the documentation of
 		  /// a BFS visit traits class.
 		#ifdef DOXYGEN
 		  template <typename _Digraph, typename _Visitor, typename _Traits>
 		#else
 		  template <typename _Digraph = ListDigraph,
 		            typename _Visitor = BfsVisitor<_Digraph>,
 		            typename _Traits = BfsVisitDefaultTraits<_Digraph> >
 		#endif
 		  class BfsVisit {
 		  public:
 		    /// \brief \ref Exception for uninitialized parameters.
 		    ///
 		    /// This error represents problems in the initialization
 		    /// of the parameters of the algorithm.
 		    class UninitializedParameter : public lemon::UninitializedParameter {
 		    public:
 		      virtual const char* what() const throw()
+		      {
 		        return "lemon::BfsVisit::UninitializedParameter";
+		      }
 		    };
 		    ///The traits class.
 		    typedef _Traits Traits;
 		    ///The type of the digraph the algorithm runs on.
 		    typedef typename Traits::Digraph Digraph;
 		    ///The visitor type used by the algorithm.
 		    typedef _Visitor Visitor;
 		    ///The type of the map that indicates which nodes are reached.
 		    typedef typename Traits::ReachedMap ReachedMap;
 		  private:
 		    typedef typename Digraph::Node Node;
 		    typedef typename Digraph::NodeIt NodeIt;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::OutArcIt OutArcIt;
 		    //Pointer to the underlying digraph.
 		    const Digraph *_digraph;
 		    //Pointer to the visitor object.
 		    Visitor *_visitor;
 		    //Pointer to the map of reached status of the nodes.
 		    ReachedMap *_reached;
 		    //Indicates if _reached is locally allocated (true) or not.
 		    bool local_reached;
 		    std::vector<typename Digraph::Node> _list;
 		    int _list_front, _list_back;
 		    //Creates the maps if necessary.
 		    void create_maps() {
 		      if(!_reached) {
 		        local_reached = true;
 		        _reached = Traits::createReachedMap(*_digraph);
+		      }
+		    }
 		  protected:
 		    BfsVisit() {}
 		  public:
 		    typedef BfsVisit Create;
 		    /// \name Named template parameters
 		    ///@{
 		    template <class T>
 		    struct SetReachedMapTraits : public Traits {
 		      typedef T ReachedMap;
 		      static ReachedMap *createReachedMap(const Digraph &digraph) {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "ReachedMap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    /// \brief \ref named-templ-param "Named parameter" for setting
 		    /// ReachedMap type.
 		    ///
 		    /// \ref named-templ-param "Named parameter" for setting ReachedMap type.
 		    template <class T>
 		    struct SetReachedMap : public BfsVisit< Digraph, Visitor,
 		                                            SetReachedMapTraits<T> > {
 		      typedef BfsVisit< Digraph, Visitor, SetReachedMapTraits<T> > Create;
 		    };
 		    ///@}
 		  public:
 		    /// \brief Constructor.
 		    ///
 		    /// Constructor.
 		    ///
 		    /// \param digraph The digraph the algorithm runs on.
 		    /// \param visitor The visitor object of the algorithm.
 		    BfsVisit(const Digraph& digraph, Visitor& visitor)
 		      : _digraph(&digraph), _visitor(&visitor),
 		        _reached(0), local_reached(false) {}
 		    /// \brief Destructor.
 		    ~BfsVisit() {
 		      if(local_reached) delete _reached;
+		    }
 		    /// \brief Sets the map that indicates which nodes are reached.
 		    ///
 		    /// Sets the map that indicates which nodes are reached.
 		    /// If you don't use this function before calling \ref run(),
 		    /// it will allocate one. The destructor deallocates this
 		    /// automatically allocated map, of course.
 		    /// \return <tt> (*this) </tt>
 		    BfsVisit &reachedMap(ReachedMap &m) {
 		      if(local_reached) {
 		        delete _reached;
 		        local_reached = false;
+		      }
 		      _reached = &m;
 		      return *this;
+		    }
 		  public:
 		    /// \name Execution control
 		    /// The simplest way to execute the algorithm is to use
 		    /// one of the member functions called \ref lemon::BfsVisit::run()
 		    /// "run()".
 		    /// \n
 		    /// If you need more control on the execution, first you must call
 		    /// \ref lemon::BfsVisit::init() "init()", then you can add several
 		    /// source nodes with \ref lemon::BfsVisit::addSource() "addSource()".
 		    /// Finally \ref lemon::BfsVisit::start() "start()" will perform the
 		    /// actual path computation.
 		    /// @{
 		    /// \brief Initializes the internal data structures.
 		    ///
 		    /// Initializes the internal data structures.
 		    void init() {
 		      create_maps();
 		      _list.resize(countNodes(*_digraph));
 		      _list_front = _list_back = -1;
 		      for (NodeIt u(*_digraph) ; u != INVALID ; ++u) {
 		        _reached->set(u, false);
+		      }
+		    }
 		    /// \brief Adds a new source node.
 		    ///
 		    /// Adds a new source node to the set of nodes to be processed.
 		    void addSource(Node s) {
 		      if(!(*_reached)[s]) {
 		          _reached->set(s,true);
 		          _visitor->start(s);
 		          _visitor->reach(s);
 		          _list[++_list_back] = s;
+		        }
+		    }
 		    /// \brief Processes the next node.
 		    ///
 		    /// Processes the next node.
 		    ///
 		    /// \return The processed node.
 		    ///
 		    /// \pre The queue must not be empty.
 		    Node processNextNode() {
 		      Node n = _list[++_list_front];
 		      _visitor->process(n);
 		      Arc e;

lemon/concepts/heap.h

Show inline comments

@@ -36,193 +36,192 @@
 		    ///
 		    /// Concept class describing the main interface of heaps.
 		    template <typename Priority, typename ItemIntMap>
 		    class Heap {
 		    public:
 		      /// Type of the items stored in the heap.
 		      typedef typename ItemIntMap::Key Item;
 		      /// Type of the priorities.
 		      typedef Priority Prio;
 		      /// \brief Type to represent the states of the items.
 		      ///
 		      /// Each item has a state associated to it. It can be "in heap",
 		      /// "pre heap" or "post heap". The later two are indifferent
 		      /// from the point of view of the heap, but may be useful for
 		      /// the user.
 		      ///
 		      /// The \c ItemIntMap must be initialized in such a way, that it
 		      /// assigns \c PRE_HEAP (<tt>-1</tt>) to every item.
 		      enum State {
 		        IN_HEAP = 0,
 		        PRE_HEAP = -1,
 		        POST_HEAP = -2
 		      };
 		      /// \brief The constructor.
 		      ///
 		      /// The constructor.
 		      /// \param map A map that assigns \c int values to keys of type
 		      /// \c Item. It is used internally by the heap implementations to
 		      /// handle the cross references. The assigned value must be
 		      /// \c PRE_HEAP (<tt>-1</tt>) for every item.
 		      explicit Heap(ItemIntMap &map) {}
 		      /// \brief The number of items stored in the heap.
 		      ///
 		      /// Returns the number of items stored in the heap.
 		      int size() const { return 0; }
 		      /// \brief Checks if the heap is empty.
 		      ///
 		      /// Returns \c true if the heap is empty.
 		      bool empty() const { return false; }
 		      /// \brief Makes the heap empty.
 		      ///
 		      /// Makes the heap empty.
 		      void clear();
 		      /// \brief Inserts an item into the heap with the given priority.
 		      ///
 		      /// Inserts the given item into the heap with the given priority.
 		      /// \param i The item to insert.
 		      /// \param p The priority of the item.
 		      void push(const Item &i, const Prio &p) {}
 		      /// \brief Returns the item having minimum priority.
 		      ///
 		      /// Returns the item having minimum priority.
 		      /// \pre The heap must be non-empty.
 		      Item top() const {}
 		      /// \brief The minimum priority.
 		      ///
 		      /// Returns the minimum priority.
 		      /// \pre The heap must be non-empty.
 		      Prio prio() const {}
 		      /// \brief Removes the item having minimum priority.
 		      ///
 		      /// Removes the item having minimum priority.
 		      /// \pre The heap must be non-empty.
 		      void pop() {}
 		      /// \brief Removes an item from the heap.
 		      ///
 		      /// Removes the given item from the heap if it is already stored.
 		      /// \param i The item to delete.
 		      void erase(const Item &i) {}
 		      /// \brief The priority of an item.
 		      ///
 		      /// Returns the priority of the given item.
 		      /// \pre \c i must be in the heap.
 		      /// \param i The item.
 		      Prio operator[](const Item &i) const {}
 		      /// \brief Sets the priority of an item or inserts it, if it is
 		      /// not stored in the heap.
 		      ///
 		      /// This method sets the priority of the given item if it is
 		      /// already stored in the heap.
 		      /// Otherwise it inserts the given item with the given priority.
 		      ///
 		      /// It may throw an \ref UnderflowPriorityException.
 		      /// \param i The item.
 		      /// \param p The priority.
 		      void set(const Item &i, const Prio &p) {}
 		      /// \brief Decreases the priority of an item to the given value.
 		      ///
 		      /// Decreases the priority of an item to the given value.
 		      /// \pre \c i must be stored in the heap with priority at least \c p.
 		      /// \param i The item.
 		      /// \param p The priority.
 		      void decrease(const Item &i, const Prio &p) {}
 		      /// \brief Increases the priority of an item to the given value.
 		      ///
 		      /// Increases the priority of an item to the given value.
 		      /// \pre \c i must be stored in the heap with priority at most \c p.
 		      /// \param i The item.
 		      /// \param p The priority.
 		      void increase(const Item &i, const Prio &p) {}
 		      /// \brief Returns if an item is in, has already been in, or has
 		      /// never been in the heap.
 		      ///
 		      /// This method returns \c PRE_HEAP if the given item has never
 		      /// been in the heap, \c IN_HEAP if it is in the heap at the moment,
 		      /// and \c POST_HEAP otherwise.
 		      /// In the latter case it is possible that the item will get back
 		      /// to the heap again.
 		      /// \param i The item.
 		      State state(const Item &i) const {}
 		      /// \brief Sets the state of an item in the heap.
 		      ///
 		      /// Sets the state of the given item in the heap. It can be used
 		      /// to manually clear the heap when it is important to achive the
 		      /// better time complexity.
 		      /// \param i The item.
 		      /// \param st The state. It should not be \c IN_HEAP.
 		      void state(const Item& i, State st) {}
 		      template <typename _Heap>
 		      struct Constraints {
 		      public:
 		        void constraints() {
 		          typedef typename _Heap::Item OwnItem;
 		          typedef typename _Heap::Prio OwnPrio;
 		          typedef typename _Heap::State OwnState;
 		          Item item;
 		          Prio prio;
 		          item=Item();
 		          prio=Prio();
 		          ignore_unused_variable_warning(item);
 		          ignore_unused_variable_warning(prio);
 		          OwnItem own_item;
 		          OwnPrio own_prio;
 		          OwnState own_state;
 		          own_item=Item();
 		          own_prio=Prio();
 		          ignore_unused_variable_warning(own_item);
 		          ignore_unused_variable_warning(own_prio);
 		          ignore_unused_variable_warning(own_state);
 		          _Heap heap1(map);
 		          _Heap heap2 = heap1;
 		          ignore_unused_variable_warning(heap1);
 		          ignore_unused_variable_warning(heap2);
 		          int s = heap.size();
 		          ignore_unused_variable_warning(s);
 		          bool e = heap.empty();
 		          ignore_unused_variable_warning(e);
 		          prio = heap.prio();
 		          item = heap.top();
 		          prio = heap[item];
 		          own_prio = heap.prio();
 		          own_item = heap.top();
 		          own_prio = heap[own_item];
 		          heap.push(item, prio);
 		          heap.push(own_item, own_prio);
 		          heap.pop();
 		          heap.set(item, prio);
 		          heap.decrease(item, prio);
 		          heap.increase(item, prio);
 		          heap.set(own_item, own_prio);
 		          heap.decrease(own_item, own_prio);
 		          heap.increase(own_item, own_prio);
 		          heap.erase(item);
 		          heap.erase(own_item);
 		          heap.clear();

lemon/dfs.h

Show inline comments

@@ -43,343 +43,337 @@
 		    ///The type of the digraph the algorithm runs on.
 		    typedef GR Digraph;
 		    ///\brief The type of the map that stores the predecessor
 		    ///arcs of the %DFS paths.
 		    ///
 		    ///The type of the map that stores the predecessor
 		    ///arcs of the %DFS paths.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    typedef typename Digraph::template NodeMap<typename Digraph::Arc> PredMap;
 		    ///Instantiates a \ref PredMap.
 		    ///This function instantiates a \ref PredMap.
 		    ///\param g is the digraph, to which we would like to define the
 		    ///\ref PredMap.
 		    static PredMap *createPredMap(const Digraph &g)
+		    {
 		      return new PredMap(g);
+		    }
 		    ///The type of the map that indicates which nodes are processed.
 		    ///The type of the map that indicates which nodes are processed.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    typedef NullMap<typename Digraph::Node,bool> ProcessedMap;
 		    ///Instantiates a \ref ProcessedMap.
 		    ///This function instantiates a \ref ProcessedMap.
 		    ///\param g is the digraph, to which
 		    ///we would like to define the \ref ProcessedMap
 		#ifdef DOXYGEN
 		    static ProcessedMap *createProcessedMap(const Digraph &g)
 		#else
 		    static ProcessedMap *createProcessedMap(const Digraph &)
 		#endif
+		    {
 		      return new ProcessedMap();
+		    }
 		    ///The type of the map that indicates which nodes are reached.
 		    ///The type of the map that indicates which nodes are reached.
 		    ///It must meet the \ref concepts::ReadWriteMap "ReadWriteMap" concept.
 		    typedef typename Digraph::template NodeMap<bool> ReachedMap;
 		    ///Instantiates a \ref ReachedMap.
 		    ///This function instantiates a \ref ReachedMap.
 		    ///\param g is the digraph, to which
 		    ///we would like to define the \ref ReachedMap.
 		    static ReachedMap *createReachedMap(const Digraph &g)
+		    {
 		      return new ReachedMap(g);
+		    }
 		    ///The type of the map that stores the distances of the nodes.
 		    ///The type of the map that stores the distances of the nodes.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    typedef typename Digraph::template NodeMap<int> DistMap;
 		    ///Instantiates a \ref DistMap.
 		    ///This function instantiates a \ref DistMap.
 		    ///\param g is the digraph, to which we would like to define the
 		    ///\ref DistMap.
 		    static DistMap *createDistMap(const Digraph &g)
+		    {
 		      return new DistMap(g);
+		    }
 		  };
 		  ///%DFS algorithm class.
 		  ///\ingroup search
 		  ///This class provides an efficient implementation of the %DFS algorithm.
 		  ///
 		  ///There is also a \ref dfs() "function-type interface" for the DFS
 		  ///algorithm, which is convenient in the simplier cases and it can be
 		  ///used easier.
 		  ///
 		  ///\tparam GR The type of the digraph the algorithm runs on.
 		  ///The default value is \ref ListDigraph. The value of GR is not used
 		  ///directly by \ref Dfs, it is only passed to \ref DfsDefaultTraits.
 		  ///\tparam TR Traits class to set various data types used by the algorithm.
 		  ///The default traits class is
 		  ///\ref DfsDefaultTraits "DfsDefaultTraits<GR>".
 		  ///See \ref DfsDefaultTraits for the documentation of
 		  ///a Dfs traits class.
 		#ifdef DOXYGEN
 		  template <typename GR,
 		            typename TR>
 		#else
 		  template <typename GR=ListDigraph,
 		            typename TR=DfsDefaultTraits<GR> >
 		#endif
 		  class Dfs {
 		  public:
 		    ///\ref Exception for uninitialized parameters.
 		    ///This error represents problems in the initialization of the
 		    ///parameters of the algorithm.
 		    class UninitializedParameter : public lemon::UninitializedParameter {
 		    public:
 		      virtual const char* what() const throw() {
 		        return "lemon::Dfs::UninitializedParameter";
+		      }
 		    };
 		    ///The type of the digraph the algorithm runs on.
 		    typedef typename TR::Digraph Digraph;
 		    ///\brief The type of the map that stores the predecessor arcs of the
 		    ///DFS paths.
 		    typedef typename TR::PredMap PredMap;
 		    ///The type of the map that stores the distances of the nodes.
 		    typedef typename TR::DistMap DistMap;
 		    ///The type of the map that indicates which nodes are reached.
 		    typedef typename TR::ReachedMap ReachedMap;
 		    ///The type of the map that indicates which nodes are processed.
 		    typedef typename TR::ProcessedMap ProcessedMap;
 		    ///The type of the paths.
 		    typedef PredMapPath<Digraph, PredMap> Path;
 		    ///The traits class.
 		    typedef TR Traits;
 		  private:
 		    typedef typename Digraph::Node Node;
 		    typedef typename Digraph::NodeIt NodeIt;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::OutArcIt OutArcIt;
 		    //Pointer to the underlying digraph.
 		    const Digraph *G;
 		    //Pointer to the map of predecessor arcs.
 		    PredMap *_pred;
 		    //Indicates if _pred is locally allocated (true) or not.
 		    bool local_pred;
 		    //Pointer to the map of distances.
 		    DistMap *_dist;
 		    //Indicates if _dist is locally allocated (true) or not.
 		    bool local_dist;
 		    //Pointer to the map of reached status of the nodes.
 		    ReachedMap *_reached;
 		    //Indicates if _reached is locally allocated (true) or not.
 		    bool local_reached;
 		    //Pointer to the map of processed status of the nodes.
 		    ProcessedMap *_processed;
 		    //Indicates if _processed is locally allocated (true) or not.
 		    bool local_processed;
 		    std::vector<typename Digraph::OutArcIt> _stack;
 		    int _stack_head;
 		    //Creates the maps if necessary.
 		    void create_maps()
+		    {
 		      if(!_pred) {
 		        local_pred = true;
 		        _pred = Traits::createPredMap(*G);
+		      }
 		      if(!_dist) {
 		        local_dist = true;
 		        _dist = Traits::createDistMap(*G);
+		      }
 		      if(!_reached) {
 		        local_reached = true;
 		        _reached = Traits::createReachedMap(*G);
+		      }
 		      if(!_processed) {
 		        local_processed = true;
 		        _processed = Traits::createProcessedMap(*G);
+		      }
+		    }
 		  protected:
 		    Dfs() {}
 		  public:
 		    typedef Dfs Create;
 		    ///\name Named template parameters
 		    ///@{
 		    template <class T>
 		    struct SetPredMapTraits : public Traits {
 		      typedef T PredMap;
 		      static PredMap *createPredMap(const Digraph &)
+		      {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "PredMap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref PredMap type.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref PredMap type.
 		    template <class T>
 		    struct SetPredMap : public Dfs<Digraph, SetPredMapTraits<T> > {
 		      typedef Dfs<Digraph, SetPredMapTraits<T> > Create;
 		    };
 		    template <class T>
 		    struct SetDistMapTraits : public Traits {
 		      typedef T DistMap;
 		      static DistMap *createDistMap(const Digraph &)
+		      {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "DistMap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref DistMap type.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref DistMap type.
 		    template <class T>
 		    struct SetDistMap : public Dfs< Digraph, SetDistMapTraits<T> > {
 		      typedef Dfs<Digraph, SetDistMapTraits<T> > Create;
 		    };
 		    template <class T>
 		    struct SetReachedMapTraits : public Traits {
 		      typedef T ReachedMap;
 		      static ReachedMap *createReachedMap(const Digraph &)
+		      {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "ReachedMap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref ReachedMap type.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref ReachedMap type.
 		    template <class T>
 		    struct SetReachedMap : public Dfs< Digraph, SetReachedMapTraits<T> > {
 		      typedef Dfs< Digraph, SetReachedMapTraits<T> > Create;
 		    };
 		    template <class T>
 		    struct SetProcessedMapTraits : public Traits {
 		      typedef T ProcessedMap;
 		      static ProcessedMap *createProcessedMap(const Digraph &)
+		      {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "ProcessedMap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref ProcessedMap type.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref ProcessedMap type.
 		    template <class T>
 		    struct SetProcessedMap : public Dfs< Digraph, SetProcessedMapTraits<T> > {
 		      typedef Dfs< Digraph, SetProcessedMapTraits<T> > Create;
 		    };
 		    struct SetStandardProcessedMapTraits : public Traits {
 		      typedef typename Digraph::template NodeMap<bool> ProcessedMap;
 		      static ProcessedMap *createProcessedMap(const Digraph &g)
+		      {
 		        return new ProcessedMap(g);
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref ProcessedMap type to be <tt>Digraph::NodeMap<bool></tt>.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref ProcessedMap type to be <tt>Digraph::NodeMap<bool></tt>.
 		    ///If you don't set it explicitly, it will be automatically allocated.
 		    struct SetStandardProcessedMap :
 		      public Dfs< Digraph, SetStandardProcessedMapTraits > {
 		      typedef Dfs< Digraph, SetStandardProcessedMapTraits > Create;
 		    };
 		    ///@}
 		  public:
 		    ///Constructor.
 		    ///Constructor.
 		    ///\param g The digraph the algorithm runs on.
 		    Dfs(const Digraph &g) :
 		      G(&g),
 		      _pred(NULL), local_pred(false),
 		      _dist(NULL), local_dist(false),
 		      _reached(NULL), local_reached(false),
 		      _processed(NULL), local_processed(false)
 		    { }
 		    ///Destructor.
 		    ~Dfs()
+		    {
 		      if(local_pred) delete _pred;
 		      if(local_dist) delete _dist;
 		      if(local_reached) delete _reached;
 		      if(local_processed) delete _processed;
+		    }
 		    ///Sets the map that stores the predecessor arcs.
 		    ///Sets the map that stores the predecessor arcs.
 		    ///If you don't use this function before calling \ref run(),
 		    ///it will allocate one. The destructor deallocates this
 		    ///automatically allocated map, of course.
 		    ///\return <tt> (*this) </tt>
 		    Dfs &predMap(PredMap &m)
+		    {
 		      if(local_pred) {
 		        delete _pred;
 		        local_pred=false;
+		      }
 		      _pred = &m;
 		      return *this;
+		    }
 		    ///Sets the map that indicates which nodes are reached.
 		    ///Sets the map that indicates which nodes are reached.
 		    ///If you don't use this function before calling \ref run(),
 		    ///it will allocate one. The destructor deallocates this
 		    ///automatically allocated map, of course.
 		    ///\return <tt> (*this) </tt>
 		    Dfs &reachedMap(ReachedMap &m)
+		    {
 		      if(local_reached) {
 		        delete _reached;
 		        local_reached=false;
+		      }
 		      _reached = &m;
 		      return *this;
+		    }
 		    ///Sets the map that indicates which nodes are processed.
 		    ///Sets the map that indicates which nodes are processed.
 		    ///If you don't use this function before calling \ref run(),
 		    ///it will allocate one. The destructor deallocates this
 		    ///automatically allocated map, of course.
 		    ///\return <tt> (*this) </tt>
@@ -881,193 +875,192 @@
 		    DfsWizardBase() : _g(0), _reached(0), _processed(0), _pred(0),
 		                      _dist(0), _path(0), _di(0) {}
 		    /// Constructor.
 		    /// This constructor requires one parameter,
 		    /// others are initiated to \c 0.
 		    /// \param g The digraph the algorithm runs on.
 		    DfsWizardBase(const GR &g) :
 		      _g(reinterpret_cast<void*>(const_cast<GR*>(&g))),
 		      _reached(0), _processed(0), _pred(0), _dist(0),  _path(0), _di(0) {}
 		  };
 		  /// Auxiliary class for the function-type interface of DFS algorithm.
 		  /// This auxiliary class is created to implement the
 		  /// \ref dfs() "function-type interface" of \ref Dfs algorithm.
 		  /// It does not have own \ref run() method, it uses the functions
 		  /// and features of the plain \ref Dfs.
 		  ///
 		  /// This class should only be used through the \ref dfs() function,
 		  /// which makes it easier to use the algorithm.
 		  template<class TR>
 		  class DfsWizard : public TR
+		  {
 		    typedef TR Base;
 		    ///The type of the digraph the algorithm runs on.
 		    typedef typename TR::Digraph Digraph;
 		    typedef typename Digraph::Node Node;
 		    typedef typename Digraph::NodeIt NodeIt;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::OutArcIt OutArcIt;
 		    ///\brief The type of the map that stores the predecessor
 		    ///arcs of the DFS paths.
 		    typedef typename TR::PredMap PredMap;
 		    ///\brief The type of the map that stores the distances of the nodes.
 		    typedef typename TR::DistMap DistMap;
 		    ///\brief The type of the map that indicates which nodes are reached.
 		    typedef typename TR::ReachedMap ReachedMap;
 		    ///\brief The type of the map that indicates which nodes are processed.
 		    typedef typename TR::ProcessedMap ProcessedMap;
 		    ///The type of the DFS paths
 		    typedef typename TR::Path Path;
 		  public:
 		    /// Constructor.
 		    DfsWizard() : TR() {}
 		    /// Constructor that requires parameters.
 		    /// Constructor that requires parameters.
 		    /// These parameters will be the default values for the traits class.
 		    /// \param g The digraph the algorithm runs on.
 		    DfsWizard(const Digraph &g) :
 		      TR(g) {}
 		    ///Copy constructor
 		    DfsWizard(const TR &b) : TR(b) {}
 		    ~DfsWizard() {}
 		    ///Runs DFS algorithm from the given source node.
 		    ///This method runs DFS algorithm from node \c s
 		    ///in order to compute the DFS path to each node.
 		    void run(Node s)
+		    {
 		      Dfs<Digraph,TR> alg(*reinterpret_cast<const Digraph*>(Base::_g));
 		      if (Base::_pred)
 		        alg.predMap(*reinterpret_cast<PredMap*>(Base::_pred));
 		      if (Base::_dist)
 		        alg.distMap(*reinterpret_cast<DistMap*>(Base::_dist));
 		      if (Base::_reached)
 		        alg.reachedMap(*reinterpret_cast<ReachedMap*>(Base::_reached));
 		      if (Base::_processed)
 		        alg.processedMap(*reinterpret_cast<ProcessedMap*>(Base::_processed));
 		      if (s!=INVALID)
 		        alg.run(s);
 		      else
 		        alg.run();
+		    }
 		    ///Finds the DFS path between \c s and \c t.
 		    ///This method runs DFS algorithm from node \c s
 		    ///in order to compute the DFS path to node \c t
 		    ///(it stops searching when \c t is processed).
 		    ///
 		    ///\return \c true if \c t is reachable form \c s.
 		    bool run(Node s, Node t)
+		    {
 		      if (s==INVALID || t==INVALID) throw UninitializedParameter();
 		      Dfs<Digraph,TR> alg(*reinterpret_cast<const Digraph*>(Base::_g));
 		      if (Base::_pred)
 		        alg.predMap(*reinterpret_cast<PredMap*>(Base::_pred));
 		      if (Base::_dist)
 		        alg.distMap(*reinterpret_cast<DistMap*>(Base::_dist));
 		      if (Base::_reached)
 		        alg.reachedMap(*reinterpret_cast<ReachedMap*>(Base::_reached));
 		      if (Base::_processed)
 		        alg.processedMap(*reinterpret_cast<ProcessedMap*>(Base::_processed));
 		      alg.run(s,t);
 		      if (Base::_path)
 		        *reinterpret_cast<Path*>(Base::_path) = alg.path(t);
 		      if (Base::_di)
 		        *Base::_di = alg.dist(t);
 		      return alg.reached(t);
+		      }
 		    ///Runs DFS algorithm to visit all nodes in the digraph.
 		    ///This method runs DFS algorithm in order to compute
 		    ///the DFS path to each node.
 		    void run()
+		    {
 		      run(INVALID);
+		    }
 		    template<class T>
 		    struct SetPredMapBase : public Base {
 		      typedef T PredMap;
 		      static PredMap *createPredMap(const Digraph &) { return 0; };
 		      SetPredMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-func-param "Named parameter"
 		    ///for setting \ref PredMap object.
 		    ///
 		    ///\ref named-func-param "Named parameter"
 		    ///for setting \ref PredMap object.
 		    template<class T>
 		    DfsWizard<SetPredMapBase<T> > predMap(const T &t)
+		    {
 		      Base::_pred=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return DfsWizard<SetPredMapBase<T> >(*this);
+		    }
 		    template<class T>
 		    struct SetReachedMapBase : public Base {
 		      typedef T ReachedMap;
 		      static ReachedMap *createReachedMap(const Digraph &) { return 0; };
 		      SetReachedMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-func-param "Named parameter"
 		    ///for setting \ref ReachedMap object.
 		    ///
 		    /// \ref named-func-param "Named parameter"
 		    ///for setting \ref ReachedMap object.
 		    template<class T>
 		    DfsWizard<SetReachedMapBase<T> > reachedMap(const T &t)
+		    {
 		      Base::_reached=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return DfsWizard<SetReachedMapBase<T> >(*this);
+		    }
 		    template<class T>
 		    struct SetDistMapBase : public Base {
 		      typedef T DistMap;
 		      static DistMap *createDistMap(const Digraph &) { return 0; };
 		      SetDistMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-func-param "Named parameter"
 		    ///for setting \ref DistMap object.
 		    ///
 		    /// \ref named-func-param "Named parameter"
 		    ///for setting \ref DistMap object.
 		    template<class T>
 		    DfsWizard<SetDistMapBase<T> > distMap(const T &t)
+		    {
 		      Base::_dist=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return DfsWizard<SetDistMapBase<T> >(*this);
+		    }
 		    template<class T>
 		    struct SetProcessedMapBase : public Base {
 		      typedef T ProcessedMap;
 		      static ProcessedMap *createProcessedMap(const Digraph &) { return 0; };
 		      SetProcessedMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-func-param "Named parameter"
 		    ///for setting \ref ProcessedMap object.
 		    ///
 		    /// \ref named-func-param "Named parameter"
 		    ///for setting \ref ProcessedMap object.
 		    template<class T>
 		    DfsWizard<SetProcessedMapBase<T> > processedMap(const T &t)
+		    {
 		      Base::_processed=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return DfsWizard<SetProcessedMapBase<T> >(*this);
@@ -1177,259 +1170,248 @@
 		  struct DfsVisitor {
 		    typedef _Digraph Digraph;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::Node Node;
 		    void start(const Node&) {}
 		    void stop(const Node&) {}
 		    void reach(const Node&) {}
 		    void discover(const Arc&) {}
 		    void examine(const Arc&) {}
 		    void leave(const Node&) {}
 		    void backtrack(const Arc&) {}
 		    template <typename _Visitor>
 		    struct Constraints {
 		      void constraints() {
 		        Arc arc;
 		        Node node;
 		        visitor.start(node);
 		        visitor.stop(arc);
 		        visitor.reach(node);
 		        visitor.discover(arc);
 		        visitor.examine(arc);
 		        visitor.leave(node);
 		        visitor.backtrack(arc);
+		      }
 		      _Visitor& visitor;
 		    };
 		  };
 		#endif
 		  /// \brief Default traits class of DfsVisit class.
 		  ///
 		  /// Default traits class of DfsVisit class.
 		  /// \tparam _Digraph The type of the digraph the algorithm runs on.
 		  template<class _Digraph>
 		  struct DfsVisitDefaultTraits {
 		    /// \brief The type of the digraph the algorithm runs on.
 		    typedef _Digraph Digraph;
 		    /// \brief The type of the map that indicates which nodes are reached.
 		    ///
 		    /// The type of the map that indicates which nodes are reached.
 		    /// It must meet the \ref concepts::ReadWriteMap "ReadWriteMap" concept.
 		    typedef typename Digraph::template NodeMap<bool> ReachedMap;
 		    /// \brief Instantiates a \ref ReachedMap.
 		    ///
 		    /// This function instantiates a \ref ReachedMap.
 		    /// \param digraph is the digraph, to which
 		    /// we would like to define the \ref ReachedMap.
 		    static ReachedMap *createReachedMap(const Digraph &digraph) {
 		      return new ReachedMap(digraph);
+		    }
 		  };
 		  /// \ingroup search
 		  ///
 		  /// \brief %DFS algorithm class with visitor interface.
 		  ///
 		  /// This class provides an efficient implementation of the %DFS algorithm
 		  /// with visitor interface.
 		  ///
 		  /// The %DfsVisit class provides an alternative interface to the Dfs
 		  /// class. It works with callback mechanism, the DfsVisit object calls
 		  /// the member functions of the \c Visitor class on every DFS event.
 		  ///
 		  /// This interface of the DFS algorithm should be used in special cases
 		  /// when extra actions have to be performed in connection with certain
 		  /// events of the DFS algorithm. Otherwise consider to use Dfs or dfs()
 		  /// instead.
 		  ///
 		  /// \tparam _Digraph The type of the digraph the algorithm runs on.
 		  /// The default value is
 		  /// \ref ListDigraph. The value of _Digraph is not used directly by
 		  /// \ref DfsVisit, it is only passed to \ref DfsVisitDefaultTraits.
 		  /// \tparam _Visitor The Visitor type that is used by the algorithm.
 		  /// \ref DfsVisitor "DfsVisitor<_Digraph>" is an empty visitor, which
 		  /// does not observe the DFS events. If you want to observe the DFS
 		  /// events, you should implement your own visitor class.
 		  /// \tparam _Traits Traits class to set various data types used by the
 		  /// algorithm. The default traits class is
 		  /// \ref DfsVisitDefaultTraits "DfsVisitDefaultTraits<_Digraph>".
 		  /// See \ref DfsVisitDefaultTraits for the documentation of
 		  /// a DFS visit traits class.
 		#ifdef DOXYGEN
 		  template <typename _Digraph, typename _Visitor, typename _Traits>
 		#else
 		  template <typename _Digraph = ListDigraph,
 		            typename _Visitor = DfsVisitor<_Digraph>,
 		            typename _Traits = DfsVisitDefaultTraits<_Digraph> >
 		#endif
 		  class DfsVisit {
 		  public:
 		    /// \brief \ref Exception for uninitialized parameters.
 		    ///
 		    /// This error represents problems in the initialization
 		    /// of the parameters of the algorithm.
 		    class UninitializedParameter : public lemon::UninitializedParameter {
 		    public:
 		      virtual const char* what() const throw()
+		      {
 		        return "lemon::DfsVisit::UninitializedParameter";
+		      }
 		    };
 		    ///The traits class.
 		    typedef _Traits Traits;
 		    ///The type of the digraph the algorithm runs on.
 		    typedef typename Traits::Digraph Digraph;
 		    ///The visitor type used by the algorithm.
 		    typedef _Visitor Visitor;
 		    ///The type of the map that indicates which nodes are reached.
 		    typedef typename Traits::ReachedMap ReachedMap;
 		  private:
 		    typedef typename Digraph::Node Node;
 		    typedef typename Digraph::NodeIt NodeIt;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::OutArcIt OutArcIt;
 		    //Pointer to the underlying digraph.
 		    const Digraph *_digraph;
 		    //Pointer to the visitor object.
 		    Visitor *_visitor;
 		    //Pointer to the map of reached status of the nodes.
 		    ReachedMap *_reached;
 		    //Indicates if _reached is locally allocated (true) or not.
 		    bool local_reached;
 		    std::vector<typename Digraph::Arc> _stack;
 		    int _stack_head;
 		    //Creates the maps if necessary.
 		    void create_maps() {
 		      if(!_reached) {
 		        local_reached = true;
 		        _reached = Traits::createReachedMap(*_digraph);
+		      }
+		    }
 		  protected:
 		    DfsVisit() {}
 		  public:
 		    typedef DfsVisit Create;
 		    /// \name Named template parameters
 		    ///@{
 		    template <class T>
 		    struct SetReachedMapTraits : public Traits {
 		      typedef T ReachedMap;
 		      static ReachedMap *createReachedMap(const Digraph &digraph) {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "ReachedMap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    /// \brief \ref named-templ-param "Named parameter" for setting
 		    /// ReachedMap type.
 		    ///
 		    /// \ref named-templ-param "Named parameter" for setting ReachedMap type.
 		    template <class T>
 		    struct SetReachedMap : public DfsVisit< Digraph, Visitor,
 		                                            SetReachedMapTraits<T> > {
 		      typedef DfsVisit< Digraph, Visitor, SetReachedMapTraits<T> > Create;
 		    };
 		    ///@}
 		  public:
 		    /// \brief Constructor.
 		    ///
 		    /// Constructor.
 		    ///
 		    /// \param digraph The digraph the algorithm runs on.
 		    /// \param visitor The visitor object of the algorithm.
 		    DfsVisit(const Digraph& digraph, Visitor& visitor)
 		      : _digraph(&digraph), _visitor(&visitor),
 		        _reached(0), local_reached(false) {}
 		    /// \brief Destructor.
 		    ~DfsVisit() {
 		      if(local_reached) delete _reached;
+		    }
 		    /// \brief Sets the map that indicates which nodes are reached.
 		    ///
 		    /// Sets the map that indicates which nodes are reached.
 		    /// If you don't use this function before calling \ref run(),
 		    /// it will allocate one. The destructor deallocates this
 		    /// automatically allocated map, of course.
 		    /// \return <tt> (*this) </tt>
 		    DfsVisit &reachedMap(ReachedMap &m) {
 		      if(local_reached) {
 		        delete _reached;
 		        local_reached=false;
+		      }
 		      _reached = &m;
 		      return *this;
+		    }
 		  public:
 		    /// \name Execution control
 		    /// The simplest way to execute the algorithm is to use
 		    /// one of the member functions called \ref lemon::DfsVisit::run()
 		    /// "run()".
 		    /// \n
 		    /// If you need more control on the execution, first you must call
 		    /// \ref lemon::DfsVisit::init() "init()", then you can add several
 		    /// source nodes with \ref lemon::DfsVisit::addSource() "addSource()".
 		    /// Finally \ref lemon::DfsVisit::start() "start()" will perform the
 		    /// actual path computation.
 		    /// @{
 		    /// \brief Initializes the internal data structures.
 		    ///
 		    /// Initializes the internal data structures.
 		    void init() {
 		      create_maps();
 		      _stack.resize(countNodes(*_digraph));
 		      _stack_head = -1;
 		      for (NodeIt u(*_digraph) ; u != INVALID ; ++u) {
 		        _reached->set(u, false);
+		      }
+		    }
 		    ///Adds a new source node.
 		    ///Adds a new source node to the set of nodes to be processed.
 		    ///
 		    ///\pre The stack must be empty. (Otherwise the algorithm gives
 		    ///false results.)
 		    ///
 		    ///\warning Distances will be wrong (or at least strange) in case of
 		    ///multiple sources.
 		    void addSource(Node s)
+		    {
 		      LEMON_DEBUG(emptyQueue(), "The stack is not empty.");
 		      if(!(*_reached)[s]) {
 		          _reached->set(s,true);
 		          _visitor->start(s);
 		          _visitor->reach(s);
 		          Arc e;
 		          _digraph->firstOut(e, s);
 		          if (e != INVALID) {
 		            _stack[++_stack_head] = e;
 		          } else {
 		            _visitor->leave(s);
+		          }

lemon/dijkstra.h

Show inline comments

@@ -132,380 +132,375 @@
 		      return new Heap(r);
+		    }
 		    ///\brief The type of the map that stores the predecessor
 		    ///arcs of the shortest paths.
 		    ///
 		    ///The type of the map that stores the predecessor
 		    ///arcs of the shortest paths.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    typedef typename Digraph::template NodeMap<typename Digraph::Arc> PredMap;
 		    ///Instantiates a \ref PredMap.
 		    ///This function instantiates a \ref PredMap.
 		    ///\param g is the digraph, to which we would like to define the
 		    ///\ref PredMap.
 		    static PredMap *createPredMap(const Digraph &g)
+		    {
 		      return new PredMap(g);
+		    }
 		    ///The type of the map that indicates which nodes are processed.
 		    ///The type of the map that indicates which nodes are processed.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    ///By default it is a NullMap.
 		    typedef NullMap<typename Digraph::Node,bool> ProcessedMap;
 		    ///Instantiates a \ref ProcessedMap.
 		    ///This function instantiates a \ref ProcessedMap.
 		    ///\param g is the digraph, to which
 		    ///we would like to define the \ref ProcessedMap
 		#ifdef DOXYGEN
 		    static ProcessedMap *createProcessedMap(const Digraph &g)
 		#else
 		    static ProcessedMap *createProcessedMap(const Digraph &)
 		#endif
+		    {
 		      return new ProcessedMap();
+		    }
 		    ///The type of the map that stores the distances of the nodes.
 		    ///The type of the map that stores the distances of the nodes.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    typedef typename Digraph::template NodeMap<typename LM::Value> DistMap;
 		    ///Instantiates a \ref DistMap.
 		    ///This function instantiates a \ref DistMap.
 		    ///\param g is the digraph, to which we would like to define
 		    ///the \ref DistMap
 		    static DistMap *createDistMap(const Digraph &g)
+		    {
 		      return new DistMap(g);
+		    }
 		  };
 		  ///%Dijkstra algorithm class.
 		  /// \ingroup shortest_path
 		  ///This class provides an efficient implementation of the %Dijkstra algorithm.
 		  ///
 		  ///The arc lengths are passed to the algorithm using a
 		  ///\ref concepts::ReadMap "ReadMap",
 		  ///so it is easy to change it to any kind of length.
 		  ///The type of the length is determined by the
 		  ///\ref concepts::ReadMap::Value "Value" of the length map.
 		  ///It is also possible to change the underlying priority heap.
 		  ///
 		  ///There is also a \ref dijkstra() "function-type interface" for the
 		  ///%Dijkstra algorithm, which is convenient in the simplier cases and
 		  ///it can be used easier.
 		  ///
 		  ///\tparam GR The type of the digraph the algorithm runs on.
 		  ///The default value is \ref ListDigraph.
 		  ///The value of GR is not used directly by \ref Dijkstra, it is only
 		  ///passed to \ref DijkstraDefaultTraits.
 		  ///\tparam LM A readable arc map that determines the lengths of the
 		  ///arcs. It is read once for each arc, so the map may involve in
 		  ///relatively time consuming process to compute the arc lengths if
 		  ///it is necessary. The default map type is \ref
 		  ///concepts::Digraph::ArcMap "Digraph::ArcMap<int>".
 		  ///The value of LM is not used directly by \ref Dijkstra, it is only
 		  ///passed to \ref DijkstraDefaultTraits.
 		  ///\tparam TR Traits class to set various data types used by the algorithm.
 		  ///The default traits class is \ref DijkstraDefaultTraits
 		  ///"DijkstraDefaultTraits<GR,LM>". See \ref DijkstraDefaultTraits
 		  ///for the documentation of a Dijkstra traits class.
 		#ifdef DOXYGEN
 		  template <typename GR, typename LM, typename TR>
 		#else
 		  template <typename GR=ListDigraph,
 		            typename LM=typename GR::template ArcMap<int>,
 		            typename TR=DijkstraDefaultTraits<GR,LM> >
 		#endif
 		  class Dijkstra {
 		  public:
 		    ///\ref Exception for uninitialized parameters.
 		    ///This error represents problems in the initialization of the
 		    ///parameters of the algorithm.
 		    class UninitializedParameter : public lemon::UninitializedParameter {
 		    public:
 		      virtual const char* what() const throw() {
 		        return "lemon::Dijkstra::UninitializedParameter";
+		      }
 		    };
 		    ///The type of the digraph the algorithm runs on.
 		    typedef typename TR::Digraph Digraph;
 		    ///The type of the length of the arcs.
 		    typedef typename TR::LengthMap::Value Value;
 		    ///The type of the map that stores the arc lengths.
 		    typedef typename TR::LengthMap LengthMap;
 		    ///\brief The type of the map that stores the predecessor arcs of the
 		    ///shortest paths.
 		    typedef typename TR::PredMap PredMap;
 		    ///The type of the map that stores the distances of the nodes.
 		    typedef typename TR::DistMap DistMap;
 		    ///The type of the map that indicates which nodes are processed.
 		    typedef typename TR::ProcessedMap ProcessedMap;
 		    ///The type of the paths.
 		    typedef PredMapPath<Digraph, PredMap> Path;
 		    ///The cross reference type used for the current heap.
 		    typedef typename TR::HeapCrossRef HeapCrossRef;
 		    ///The heap type used by the algorithm.
 		    typedef typename TR::Heap Heap;
 		    ///The operation traits class.
 		    typedef typename TR::OperationTraits OperationTraits;
 		    ///The traits class.
 		    typedef TR Traits;
 		  private:
 		    typedef typename Digraph::Node Node;
 		    typedef typename Digraph::NodeIt NodeIt;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::OutArcIt OutArcIt;
 		    //Pointer to the underlying digraph.
 		    const Digraph *G;
 		    //Pointer to the length map.
 		    const LengthMap *length;
 		    //Pointer to the map of predecessors arcs.
 		    PredMap *_pred;
 		    //Indicates if _pred is locally allocated (true) or not.
 		    bool local_pred;
 		    //Pointer to the map of distances.
 		    DistMap *_dist;
 		    //Indicates if _dist is locally allocated (true) or not.
 		    bool local_dist;
 		    //Pointer to the map of processed status of the nodes.
 		    ProcessedMap *_processed;
 		    //Indicates if _processed is locally allocated (true) or not.
 		    bool local_processed;
 		    //Pointer to the heap cross references.
 		    HeapCrossRef *_heap_cross_ref;
 		    //Indicates if _heap_cross_ref is locally allocated (true) or not.
 		    bool local_heap_cross_ref;
 		    //Pointer to the heap.
 		    Heap *_heap;
 		    //Indicates if _heap is locally allocated (true) or not.
 		    bool local_heap;
 		    //Creates the maps if necessary.
 		    void create_maps()
+		    {
 		      if(!_pred) {
 		        local_pred = true;
 		        _pred = Traits::createPredMap(*G);
+		      }
 		      if(!_dist) {
 		        local_dist = true;
 		        _dist = Traits::createDistMap(*G);
+		      }
 		      if(!_processed) {
 		        local_processed = true;
 		        _processed = Traits::createProcessedMap(*G);
+		      }
 		      if (!_heap_cross_ref) {
 		        local_heap_cross_ref = true;
 		        _heap_cross_ref = Traits::createHeapCrossRef(*G);
+		      }
 		      if (!_heap) {
 		        local_heap = true;
 		        _heap = Traits::createHeap(*_heap_cross_ref);
+		      }
+		    }
 		  public:
 		    typedef Dijkstra Create;
 		    ///\name Named template parameters
 		    ///@{
 		    template <class T>
 		    struct SetPredMapTraits : public Traits {
 		      typedef T PredMap;
 		      static PredMap *createPredMap(const Digraph &)
+		      {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "PredMap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref PredMap type.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref PredMap type.
 		    template <class T>
 		    struct SetPredMap
 		      : public Dijkstra< Digraph, LengthMap, SetPredMapTraits<T> > {
 		      typedef Dijkstra< Digraph, LengthMap, SetPredMapTraits<T> > Create;
 		    };
 		    template <class T>
 		    struct SetDistMapTraits : public Traits {
 		      typedef T DistMap;
 		      static DistMap *createDistMap(const Digraph &)
+		      {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "DistMap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref DistMap type.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref DistMap type.
 		    template <class T>
 		    struct SetDistMap
 		      : public Dijkstra< Digraph, LengthMap, SetDistMapTraits<T> > {
 		      typedef Dijkstra< Digraph, LengthMap, SetDistMapTraits<T> > Create;
 		    };
 		    template <class T>
 		    struct SetProcessedMapTraits : public Traits {
 		      typedef T ProcessedMap;
 		      static ProcessedMap *createProcessedMap(const Digraph &)
+		      {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "ProcessedMap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref ProcessedMap type.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref ProcessedMap type.
 		    template <class T>
 		    struct SetProcessedMap
 		      : public Dijkstra< Digraph, LengthMap, SetProcessedMapTraits<T> > {
 		      typedef Dijkstra< Digraph, LengthMap, SetProcessedMapTraits<T> > Create;
 		    };
 		    struct SetStandardProcessedMapTraits : public Traits {
 		      typedef typename Digraph::template NodeMap<bool> ProcessedMap;
 		      static ProcessedMap *createProcessedMap(const Digraph &g)
+		      {
 		        return new ProcessedMap(g);
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref ProcessedMap type to be <tt>Digraph::NodeMap<bool></tt>.
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref ProcessedMap type to be <tt>Digraph::NodeMap<bool></tt>.
 		    ///If you don't set it explicitly, it will be automatically allocated.
 		    struct SetStandardProcessedMap
 		      : public Dijkstra< Digraph, LengthMap, SetStandardProcessedMapTraits > {
 		      typedef Dijkstra< Digraph, LengthMap, SetStandardProcessedMapTraits >
 		      Create;
 		    };
 		    template <class H, class CR>
 		    struct SetHeapTraits : public Traits {
 		      typedef CR HeapCrossRef;
 		      typedef H Heap;
 		      static HeapCrossRef *createHeapCrossRef(const Digraph &) {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "HeapCrossRef is not initialized");
 		        return 0; // ignore warnings
+		      }
 		      static Heap *createHeap(HeapCrossRef &)
+		      {
-		        throw UninitializedParameter();
+		        LEMON_ASSERT(false, "Heap is not initialized");
 		        return 0; // ignore warnings
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///heap and cross reference type
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting heap and cross
 		    ///reference type.
 		    template <class H, class CR = typename Digraph::template NodeMap<int> >
 		    struct SetHeap
 		      : public Dijkstra< Digraph, LengthMap, SetHeapTraits<H, CR> > {
 		      typedef Dijkstra< Digraph, LengthMap, SetHeapTraits<H, CR> > Create;
 		    };
 		    template <class H, class CR>
 		    struct SetStandardHeapTraits : public Traits {
 		      typedef CR HeapCrossRef;
 		      typedef H Heap;
 		      static HeapCrossRef *createHeapCrossRef(const Digraph &G) {
 		        return new HeapCrossRef(G);
+		      }
 		      static Heap *createHeap(HeapCrossRef &R)
+		      {
 		        return new Heap(R);
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///heap and cross reference type with automatic allocation
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting heap and cross
 		    ///reference type. It can allocate the heap and the cross reference
 		    ///object if the cross reference's constructor waits for the digraph as
 		    ///parameter and the heap's constructor waits for the cross reference.
 		    template <class H, class CR = typename Digraph::template NodeMap<int> >
 		    struct SetStandardHeap
 		      : public Dijkstra< Digraph, LengthMap, SetStandardHeapTraits<H, CR> > {
 		      typedef Dijkstra< Digraph, LengthMap, SetStandardHeapTraits<H, CR> >
 		      Create;
 		    };
 		    template <class T>
 		    struct SetOperationTraitsTraits : public Traits {
 		      typedef T OperationTraits;
 		    };
 		    /// \brief \ref named-templ-param "Named parameter" for setting
 		    ///\ref OperationTraits type
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting
 		    ///\ref OperationTraits type.
 		    template <class T>
 		    struct SetOperationTraits
 		      : public Dijkstra<Digraph, LengthMap, SetOperationTraitsTraits<T> > {
 		      typedef Dijkstra<Digraph, LengthMap, SetOperationTraitsTraits<T> >
 		      Create;
 		    };
 		    ///@}
 		  protected:
 		    Dijkstra() {}
 		  public:
 		    ///Constructor.
 		    ///Constructor.
 		    ///\param _g The digraph the algorithm runs on.
 		    ///\param _length The length map used by the algorithm.
 		    Dijkstra(const Digraph& _g, const LengthMap& _length) :
 		      G(&_g), length(&_length),
 		      _pred(NULL), local_pred(false),
 		      _dist(NULL), local_dist(false),
 		      _processed(NULL), local_processed(false),
 		      _heap_cross_ref(NULL), local_heap_cross_ref(false),
 		      _heap(NULL), local_heap(false)
 		    { }
 		    ///Destructor.
 		    ~Dijkstra()
+		    {
 		      if(local_pred) delete _pred;
 		      if(local_dist) delete _dist;
 		      if(local_processed) delete _processed;
 		      if(local_heap_cross_ref) delete _heap_cross_ref;
 		      if(local_heap) delete _heap;
+		    }
 		    ///Sets the length map.
 		    ///Sets the length map.
 		    ///\return <tt> (*this) </tt>
 		    Dijkstra &lengthMap(const LengthMap &m)
+		    {
 		      length = &m;
 		      return *this;
@@ -1065,215 +1060,213 @@
 		    void *_length;
 		    //Pointer to the map of processed nodes.
 		    void *_processed;
 		    //Pointer to the map of predecessors arcs.
 		    void *_pred;
 		    //Pointer to the map of distances.
 		    void *_dist;
 		    //Pointer to the shortest path to the target node.
 		    void *_path;
 		    //Pointer to the distance of the target node.
 		    void *_di;
 		  public:
 		    /// Constructor.
 		    /// This constructor does not require parameters, therefore it initiates
 		    /// all of the attributes to \c 0.
 		    DijkstraWizardBase() : _g(0), _length(0), _processed(0), _pred(0),
 		                           _dist(0), _path(0), _di(0) {}
 		    /// Constructor.
 		    /// This constructor requires two parameters,
 		    /// others are initiated to \c 0.
 		    /// \param g The digraph the algorithm runs on.
 		    /// \param l The length map.
 		    DijkstraWizardBase(const GR &g,const LM &l) :
 		      _g(reinterpret_cast<void*>(const_cast<GR*>(&g))),
 		      _length(reinterpret_cast<void*>(const_cast<LM*>(&l))),
 		      _processed(0), _pred(0), _dist(0), _path(0), _di(0) {}
 		  };
 		  /// Auxiliary class for the function-type interface of Dijkstra algorithm.
 		  /// This auxiliary class is created to implement the
 		  /// \ref dijkstra() "function-type interface" of \ref Dijkstra algorithm.
 		  /// It does not have own \ref run() method, it uses the functions
 		  /// and features of the plain \ref Dijkstra.
 		  ///
 		  /// This class should only be used through the \ref dijkstra() function,
 		  /// which makes it easier to use the algorithm.
 		  template<class TR>
 		  class DijkstraWizard : public TR
+		  {
 		    typedef TR Base;
 		    ///The type of the digraph the algorithm runs on.
 		    typedef typename TR::Digraph Digraph;
 		    typedef typename Digraph::Node Node;
 		    typedef typename Digraph::NodeIt NodeIt;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::OutArcIt OutArcIt;
 		    ///The type of the map that stores the arc lengths.
 		    typedef typename TR::LengthMap LengthMap;
 		    ///The type of the length of the arcs.
 		    typedef typename LengthMap::Value Value;
 		    ///\brief The type of the map that stores the predecessor
 		    ///arcs of the shortest paths.
 		    typedef typename TR::PredMap PredMap;
 		    ///The type of the map that stores the distances of the nodes.
 		    typedef typename TR::DistMap DistMap;
 		    ///The type of the map that indicates which nodes are processed.
 		    typedef typename TR::ProcessedMap ProcessedMap;
 		    ///The type of the shortest paths
 		    typedef typename TR::Path Path;
 		    ///The heap type used by the dijkstra algorithm.
 		    typedef typename TR::Heap Heap;
 		  public:
 		    /// Constructor.
 		    DijkstraWizard() : TR() {}
 		    /// Constructor that requires parameters.
 		    /// Constructor that requires parameters.
 		    /// These parameters will be the default values for the traits class.
 		    /// \param g The digraph the algorithm runs on.
 		    /// \param l The length map.
 		    DijkstraWizard(const Digraph &g, const LengthMap &l) :
 		      TR(g,l) {}
 		    ///Copy constructor
 		    DijkstraWizard(const TR &b) : TR(b) {}
 		    ~DijkstraWizard() {}
 		    ///Runs Dijkstra algorithm from the given source node.
 		    ///This method runs %Dijkstra algorithm from the given source node
 		    ///in order to compute the shortest path to each node.
 		    void run(Node s)
+		    {
 		      if (s==INVALID) throw UninitializedParameter();
 		      Dijkstra<Digraph,LengthMap,TR>
 		        dijk(*reinterpret_cast<const Digraph*>(Base::_g),
 		             *reinterpret_cast<const LengthMap*>(Base::_length));
 		      if (Base::_pred)
 		        dijk.predMap(*reinterpret_cast<PredMap*>(Base::_pred));
 		      if (Base::_dist)
 		        dijk.distMap(*reinterpret_cast<DistMap*>(Base::_dist));
 		      if (Base::_processed)
 		        dijk.processedMap(*reinterpret_cast<ProcessedMap*>(Base::_processed));
 		      dijk.run(s);
+		    }
 		    ///Finds the shortest path between \c s and \c t.
 		    ///This method runs the %Dijkstra algorithm from node \c s
 		    ///in order to compute the shortest path to node \c t
 		    ///(it stops searching when \c t is processed).
 		    ///
 		    ///\return \c true if \c t is reachable form \c s.
 		    bool run(Node s, Node t)
+		    {
 		      if (s==INVALID || t==INVALID) throw UninitializedParameter();
 		      Dijkstra<Digraph,LengthMap,TR>
 		        dijk(*reinterpret_cast<const Digraph*>(Base::_g),
 		             *reinterpret_cast<const LengthMap*>(Base::_length));
 		      if (Base::_pred)
 		        dijk.predMap(*reinterpret_cast<PredMap*>(Base::_pred));
 		      if (Base::_dist)
 		        dijk.distMap(*reinterpret_cast<DistMap*>(Base::_dist));
 		      if (Base::_processed)
 		        dijk.processedMap(*reinterpret_cast<ProcessedMap*>(Base::_processed));
 		      dijk.run(s,t);
 		      if (Base::_path)
 		        *reinterpret_cast<Path*>(Base::_path) = dijk.path(t);
 		      if (Base::_di)
 		        *reinterpret_cast<Value*>(Base::_di) = dijk.dist(t);
 		      return dijk.reached(t);
+		    }
 		    template<class T>
 		    struct SetPredMapBase : public Base {
 		      typedef T PredMap;
 		      static PredMap *createPredMap(const Digraph &) { return 0; };
 		      SetPredMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-func-param "Named parameter"
 		    ///for setting \ref PredMap object.
 		    ///
 		    ///\ref named-func-param "Named parameter"
 		    ///for setting \ref PredMap object.
 		    template<class T>
 		    DijkstraWizard<SetPredMapBase<T> > predMap(const T &t)
+		    {
 		      Base::_pred=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return DijkstraWizard<SetPredMapBase<T> >(*this);
+		    }
 		    template<class T>
 		    struct SetDistMapBase : public Base {
 		      typedef T DistMap;
 		      static DistMap *createDistMap(const Digraph &) { return 0; };
 		      SetDistMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-func-param "Named parameter"
 		    ///for setting \ref DistMap object.
 		    ///
 		    ///\ref named-func-param "Named parameter"
 		    ///for setting \ref DistMap object.
 		    template<class T>
 		    DijkstraWizard<SetDistMapBase<T> > distMap(const T &t)
+		    {
 		      Base::_dist=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return DijkstraWizard<SetDistMapBase<T> >(*this);
+		    }
 		    template<class T>
 		    struct SetProcessedMapBase : public Base {
 		      typedef T ProcessedMap;
 		      static ProcessedMap *createProcessedMap(const Digraph &) { return 0; };
 		      SetProcessedMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-func-param "Named parameter"
 		    ///for setting \ref ProcessedMap object.
 		    ///
 		    /// \ref named-func-param "Named parameter"
 		    ///for setting \ref ProcessedMap object.
 		    template<class T>
 		    DijkstraWizard<SetProcessedMapBase<T> > processedMap(const T &t)
+		    {
 		      Base::_processed=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return DijkstraWizard<SetProcessedMapBase<T> >(*this);
+		    }
 		    template<class T>
 		    struct SetPathBase : public Base {
 		      typedef T Path;
 		      SetPathBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-func-param "Named parameter"
 		    ///for getting the shortest path to the target node.
 		    ///
 		    ///\ref named-func-param "Named parameter"
 		    ///for getting the shortest path to the target node.
 		    template<class T>
 		    DijkstraWizard<SetPathBase<T> > path(const T &t)
+		    {
 		      Base::_path=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return DijkstraWizard<SetPathBase<T> >(*this);
+		    }
 		    ///\brief \ref named-func-param "Named parameter"
 		    ///for getting the distance of the target node.
 		    ///
 		    ///\ref named-func-param "Named parameter"
 		    ///for getting the distance of the target node.
 		    DijkstraWizard dist(const Value &d)
+		    {
 		      Base::_di=reinterpret_cast<void*>(const_cast<Value*>(&d));

lemon/error.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		#ifndef LEMON_ERROR_H
 		#define LEMON_ERROR_H
 		/// \ingroup exceptions
 		/// \file
 		/// \brief Basic exception classes and error handling.
 		#include <exception>
 		#include <string>
 		#include <sstream>
 		#include <iostream>
 		#include <cstdlib>
 		#include <memory>
 		namespace lemon {
 		  /// \addtogroup exceptions
 		  /// @{
-		  /// \brief Exception safe wrapper class.
+		  /// \brief Generic exception class.
 		  ///
 		  /// Exception safe wrapper class to implement the members of exceptions.
 		  template <typename _Type>
 		  class ExceptionMember {
 		  public:
 		    typedef _Type Type;
 		    ExceptionMember() throw() {
 		      try {
 		        ptr.reset(new Type());
 		      } catch (...) {}
+		    }
 		    ExceptionMember(const Type& type) throw() {
 		      try {
 		        ptr.reset(new Type());
 		        if (ptr.get() == 0) return;
 		        *ptr = type;
 		      } catch (...) {}
+		    }
 		    ExceptionMember(const ExceptionMember& copy) throw() {
 		      try {
 		        if (!copy.valid()) return;
 		        ptr.reset(new Type());
 		        if (ptr.get() == 0) return;
 		        *ptr = copy.get();
 		      } catch (...) {}
+		    }
 		    ExceptionMember& operator=(const ExceptionMember& copy) throw() {
 		      if (ptr.get() == 0) return;
 		      try {
 		        if (!copy.valid()) return;
 		        *ptr = copy.get();
 		      } catch (...) {}
+		    }
 		    void set(const Type& type) throw() {
 		      if (ptr.get() == 0) return;
 		      try {
 		        *ptr = type;
 		      } catch (...) {}
+		    }
 		    const Type& get() const {
 		      return *ptr;
+		    }
 		    bool valid() const throw() {
 		      return ptr.get() != 0;
+		    }
 		  private:
 		    std::auto_ptr<_Type> ptr;
 		  };
 		  /// Exception-safe convenient error message builder class.
 		  /// Helper class which provides a convenient ostream-like (operator <<
 		  /// based) interface to create a string message. Mostly useful in
 		  /// exception classes (therefore the name).
 		  class ErrorMessage {
 		  protected:
 		    ///\e
 		    mutable std::auto_ptr<std::ostringstream> buf;
 		    ///\e
 		    bool init() throw() {
 		      try {
 		        buf.reset(new std::ostringstream);
+		      }
 		      catch(...) {
 		        buf.reset();
+		      }
 		      return buf.get();
+		    }
 		  public:
 		    ///\e
 		    ErrorMessage() throw() { init(); }
 		    ErrorMessage(const ErrorMessage& em) throw() : buf(em.buf) { }
 		    ///\e
 		    ErrorMessage(const char *msg) throw() {
 		      init();
 		      *this << msg;
+		    }
 		    ///\e
 		    ErrorMessage(const std::string &msg) throw() {
 		      init();
 		      *this << msg;
+		    }
 		    ///\e
 		    template <typename T>
 		    ErrorMessage& operator<<(const T &t) throw() {
 		      if( ! buf.get() ) return *this;
 		      try {
 		        *buf << t;
+		      }
 		      catch(...) {
 		        buf.reset();
+		      }
 		      return *this;
+		    }
 		    ///\e
 		    const char* message() throw() {
 		      if( ! buf.get() ) return 0;
 		      const char* mes = 0;
 		      try {
 		        mes = buf->str().c_str();
+		      }
 		      catch(...) {}
 		      return mes;
+		    }
 		  };
 		  /// Generic exception class.
 		  /// Base class for exceptions used in LEMON.
 		  ///
 		  class Exception : public std::exception {
 		  public:
 		    ///\e
 		    Exception() {}
-		    ///\e
+		    ///Constructor
 		    Exception() throw() {}
 		    ///Virtual destructor
 		    virtual ~Exception() throw() {}
-		    ///\e
+		    ///A short description of the exception
 		    virtual const char* what() const throw() {
 		      return "lemon::Exception";
+		    }
 		  };
-		  /// One of the two main subclasses of \ref Exception.
+		  /// \brief Input-Output error
 		  ///
 		  /// This exception is thrown when a file operation cannot be
 		  /// succeeded.
 		  class IoError : public Exception {
 		  protected:
 		    std::string _message;
 		    std::string _file;
 		  /// Logic errors represent problems in the internal logic of a program;
 		  /// in theory, these are preventable, and even detectable before the
-		  /// program runs (e.g. violations of class invariants).
+		    mutable std::string _what;
 		  public:
 		    /// Copy constructor
 		    IoError(const IoError &error) throw() : Exception() {
 		      message(error._message);
 		      file(error._file);
+		    }
 		    /// Constructor
 		    explicit IoError(const char *message) throw() {
 		      IoError::message(message);
+		    }
 		    /// Constructor
 		    explicit IoError(const std::string &message) throw() {
 		      IoError::message(message);
+		    }
 		    /// Constructor
 		    explicit IoError(const char *message,
 		                     const std::string &file) throw() {
 		      IoError::message(message);
 		      IoError::file(file);
+		    }
 		    /// Constructor
 		    explicit IoError(const std::string &message,
 		                     const std::string &file) throw() {
 		      IoError::message(message);
 		      IoError::file(file);
+		    }
 		    /// Virtual destructor
 		    virtual ~IoError() throw() {}
 		    /// Set the error message
 		    void message(const char *message) throw() {
 		      try {
 		        _message = message;
 		      } catch (...) {}
+		    }
 		    /// Set the error message
 		    void message(const std::string& message) throw() {
 		      try {
 		        _message = message;
 		      } catch (...) {}
+		    }
 		    /// Set the file name
 		    void file(const std::string &file) throw() {
 		      try {
 		        _file = file;
 		      } catch (...) {}
+		    }
 		    /// Returns the error message
 		    const std::string& message() const throw() {
 		      return _message;
+		    }
 		    /// \brief Returns the filename
 		  ///
 		  /// A typical example for this is \ref UninitializedParameter.
 		  class LogicError : public Exception {
-		  public:
+		    /// Returns the filename or an empty string if it was not specified.
 		    const std::string& file() const throw() {
 		      return _file;
+		    }
 		    /// \brief Returns a short error message
 		    ///
 		    /// Returns a short error message which contains the message and the
 		    /// file name.
 		    virtual const char* what() const throw() {
-		      return "lemon::LogicError";
+		      try {
 		        _what.clear();
 		        std::ostringstream oss;
 		        oss << "lemon:IoError" << ": ";
 		        oss << _message;
 		        if (!_file.empty()) {
 		          oss << " ('" << _file << "')";
+		    }
 		        _what = oss.str();
+		      }
 		      catch (...) {}
 		      if (!_what.empty()) return _what.c_str();
 		      else return "lemon:IoError";
+		    }
 		  };
 		  /// \ref Exception for uninitialized parameters.
 		  /// This error represents problems in the initialization
 		  /// of the parameters of the algorithms.
 		  class UninitializedParameter : public LogicError {
 		  public:
 		    virtual const char* what() const throw() {
 		      return "lemon::UninitializedParameter";
+		    }
 		  };
 		  /// One of the two main subclasses of \ref Exception.
 		  /// Runtime errors represent problems outside the scope of a program;
 		  /// they cannot be easily predicted and can generally only be caught
 		  /// as the program executes.
 		  class RuntimeError : public Exception {
 		  public:
 		    virtual const char* what() const throw() {
 		      return "lemon::RuntimeError";
+		    }
 		  };
 		  ///\e
 		  class RangeError : public RuntimeError {
 		  public:
 		    virtual const char* what() const throw() {
 		      return "lemon::RangeError";
+		    }
 		  };
 		  ///\e
 		  class IoError : public RuntimeError {
 		  public:
 		    virtual const char* what() const throw() {
 		      return "lemon::IoError";
+		    }
 		  };
 		  ///\e
 		  class DataFormatError : public IoError {
 		  /// \brief Format error
 		  ///
 		  /// This exception is thrown when an input file has wrong
 		  /// format or a data representation is not legal.
 		  class FormatError : public Exception {
 		  protected:
 		    ExceptionMember<std::string> _message;
 		    ExceptionMember<std::string> _file;
 		    std::string _message;
 		    std::string _file;
 		    int _line;
-		    mutable ExceptionMember<std::string> _message_holder;
+		    mutable std::string _what;
 		  public:
 		    DataFormatError(const DataFormatError &dfe) :
 		      IoError(dfe), _message(dfe._message), _file(dfe._file),
 		      _line(dfe._line) {}
 		    ///\e
 		    explicit DataFormatError(const char *the_message)
 		      : _message(the_message), _line(0) {}
 		    ///\e
 		    DataFormatError(const std::string &file_name, int line_num,
 		                    const char *the_message)
 		      : _message(the_message), _line(line_num) { file(file_name); }
 		    ///\e
 		    void line(int ln) { _line = ln; }
 		    ///\e
 		    void message(const std::string& msg) { _message.set(msg); }
 		    ///\e
 		    void file(const std::string &fl) { _file.set(fl); }
 		    ///\e
 		    int line() const { return _line; }
 		    ///\e
 		    const char* message() const {
 		      if (_message.valid() && !_message.get().empty()) {
 		        return _message.get().c_str();
 		      } else {
 		        return 0;
+		      }
+		    /// Copy constructor
 		    FormatError(const FormatError &error) throw() : Exception() {
 		      message(error._message);
 		      file(error._file);
 		      line(error._line);
+		    }
 		    /// \brief Returns the filename.
 		    ///
 		    /// Returns \e null if the filename was not specified.
 		    const char* file() const {
 		      if (_file.valid() && !_file.get().empty()) {
 		        return _file.get().c_str();
 		      } else {
 		        return 0;
+		      }
+		    /// Constructor
 		    explicit FormatError(const char *message) throw() {
 		      FormatError::message(message);
 		      _line = 0;
+		    }
-		    ///\e
+		    /// Constructor
 		    explicit FormatError(const std::string &message) throw() {
 		      FormatError::message(message);
 		      _line = 0;
+		    }
 		    /// Constructor
 		    explicit FormatError(const char *message,
 		                         const std::string &file, int line = 0) throw() {
 		      FormatError::message(message);
 		      FormatError::file(file);
 		      FormatError::line(line);
+		    }
 		    /// Constructor
 		    explicit FormatError(const std::string &message,
 		                         const std::string &file, int line = 0) throw() {
 		      FormatError::message(message);
 		      FormatError::file(file);
 		      FormatError::line(line);
+		    }
 		    /// Virtual destructor
 		    virtual ~FormatError() throw() {}
 		    /// Set the line number
 		    void line(int line) throw() { _line = line; }
 		    /// Set the error message
 		    void message(const char *message) throw() {
 		      try {
 		        _message = message;
 		      } catch (...) {}
+		    }
 		    /// Set the error message
 		    void message(const std::string& message) throw() {
 		      try {
 		        _message = message;
 		      } catch (...) {}
+		    }
 		    /// Set the file name
 		    void file(const std::string &file) throw() {
 		      try {
 		        _file = file;
 		      } catch (...) {}
+		    }
 		    /// \brief Returns the line number
 		    ///
 		    /// Returns the line number or zero if it was not specified.
 		    int line() const throw() { return _line; }
 		    /// Returns the error message
 		    const std::string& message() const throw() {
 		      return _message;
+		    }
 		    /// \brief Returns the filename
 		    ///
 		    /// Returns the filename or an empty string if it was not specified.
 		    const std::string& file() const throw() {
 		      return _file;
+		    }
 		    /// \brief Returns a short error message
 		    ///
 		    /// Returns a short error message which contains the message, the
 		    /// file name and the line number.
 		    virtual const char* what() const throw() {
 		      try {
 		        std::ostringstream ostr;
 		        ostr << "lemon:DataFormatError" << ": ";
 		        if (message()) ostr << message();
 		        if( file() || line() != 0 ) {
 		          ostr << " (";
 		          if( file() ) ostr << "in file '" << file() << "'";
 		          if( file() && line() != 0 ) ostr << " ";
 		          if( line() != 0 ) ostr << "at line " << line();
-		          ostr << ")";
+		        _what.clear();
 		        std::ostringstream oss;
 		        oss << "lemon:FormatError" << ": ";
 		        oss << _message;
 		        if (!_file.empty() || _line != 0) {
 		          oss << " (";
 		          if (!_file.empty()) oss << "in file '" << _file << "'";
 		          if (!_file.empty() && _line != 0) oss << " ";
 		          if (_line != 0) oss << "at line " << _line;
 		          oss << ")";
+		        }
-		        _message_holder.set(ostr.str());
+		        _what = oss.str();
+		      }
 		      catch (...) {}
 		      if( _message_holder.valid()) return _message_holder.get().c_str();
 		      return "lemon:DataFormatError";
 		      if (!_what.empty()) return _what.c_str();
 		      else return "lemon:FormatError";
+		    }
 		    virtual ~DataFormatError() throw() {}
 		  };
 		  ///\e
 		  class FileOpenError : public IoError {
 		  protected:
 		    ExceptionMember<std::string> _file;
 		    mutable ExceptionMember<std::string> _message_holder;
 		  public:
 		    FileOpenError(const FileOpenError &foe) :
 		      IoError(foe), _file(foe._file) {}
 		    ///\e
 		    explicit FileOpenError(const std::string& fl)
 		      : _file(fl) {}
 		    ///\e
 		    void file(const std::string &fl) { _file.set(fl); }
 		    /// \brief Returns the filename.
 		    ///
 		    /// Returns \e null if the filename was not specified.
 		    const char* file() const {
 		      if (_file.valid() && !_file.get().empty()) {
 		        return _file.get().c_str();
 		      } else {
 		        return 0;
+		      }
+		    }
 		    ///\e
 		    virtual const char* what() const throw() {
 		      try {
 		        std::ostringstream ostr;
 		        ostr << "lemon::FileOpenError" << ": ";
 		        ostr << "Cannot open file - " << file();
 		        _message_holder.set(ostr.str());
+		      }
 		      catch (...) {}
 		      if( _message_holder.valid()) return _message_holder.get().c_str();
 		      return "lemon::FileOpenError";
+		    }
 		    virtual ~FileOpenError() throw() {}
 		  };
 		  class IoParameterError : public IoError {
 		  protected:
 		    ExceptionMember<std::string> _message;
 		    ExceptionMember<std::string> _file;
 		    mutable ExceptionMember<std::string> _message_holder;
 		  public:
 		    IoParameterError(const IoParameterError &ile) :
 		      IoError(ile), _message(ile._message), _file(ile._file) {}
 		    ///\e
 		    explicit IoParameterError(const char *the_message)
 		      : _message(the_message) {}
 		    ///\e
 		    IoParameterError(const char *file_name, const char *the_message)
 		      : _message(the_message), _file(file_name) {}
 		     ///\e
 		    void message(const std::string& msg) { _message.set(msg); }
 		    ///\e
 		    void file(const std::string &fl) { _file.set(fl); }
 		     ///\e
 		    const char* message() const {
 		      if (_message.valid()) {
 		        return _message.get().c_str();
 		      } else {
 		        return 0;
+		      }
+		    }
 		    /// \brief Returns the filename.
 		    ///
 		    /// Returns \c 0 if the filename was not specified.
 		    const char* file() const {
 		      if (_file.valid()) {
 		        return _file.get().c_str();
 		      } else {
 		        return 0;
+		      }
+		    }
 		    ///\e
 		    virtual const char* what() const throw() {
 		      try {
 		        std::ostringstream ostr;
 		        if (message()) ostr << message();
 		        if (file()) ostr << "(when reading file '" << file() << "')";
 		        _message_holder.set(ostr.str());
+		      }
 		      catch (...) {}
 		      if( _message_holder.valid() ) return _message_holder.get().c_str();
 		      return "lemon:IoParameterError";
+		    }
 		    virtual ~IoParameterError() throw() {}
 		  };
 		  /// @}
+		}
 		#endif // LEMON_ERROR_H

lemon/graph_to_eps.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		#ifndef LEMON_GRAPH_TO_EPS_H
 		#define LEMON_GRAPH_TO_EPS_H
 		#include<iostream>
 		#include<fstream>
 		#include<sstream>
 		#include<algorithm>
 		#include<vector>
 		#ifndef WIN32
 		#include<sys/time.h>
 		#include<ctime>
 		#else
 		#define WIN32_LEAN_AND_MEAN
 		#define NOMINMAX
 		#include<windows.h>
 		#endif
 		#include<lemon/math.h>
 		#include<lemon/core.h>
 		#include<lemon/dim2.h>
 		#include<lemon/maps.h>
 		#include<lemon/color.h>
 		#include<lemon/bits/bezier.h>
 		#include<lemon/error.h>
 		///\ingroup eps_io
 		///\file
 		///\brief A well configurable tool for visualizing graphs
 		namespace lemon {
 		  namespace _graph_to_eps_bits {
 		    template<class MT>
 		    class _NegY {
 		    public:
 		      typedef typename MT::Key Key;
 		      typedef typename MT::Value Value;
 		      const MT &map;
 		      int yscale;
 		      _NegY(const MT &m,bool b) : map(m), yscale(1-b*2) {}
 		      Value operator[](Key n) { return Value(map[n].x,map[n].y*yscale);}
 		    };
+		  }
 		///Default traits class of \ref GraphToEps
 		///Default traits class of \ref GraphToEps.
 		///
 		///\c G is the type of the underlying graph.
 		template<class G>
 		struct DefaultGraphToEpsTraits
+		{
 		  typedef G Graph;
 		  typedef typename Graph::Node Node;
 		  typedef typename Graph::NodeIt NodeIt;
 		  typedef typename Graph::Arc Arc;
 		  typedef typename Graph::ArcIt ArcIt;
 		  typedef typename Graph::InArcIt InArcIt;
 		  typedef typename Graph::OutArcIt OutArcIt;
 		  const Graph &g;
 		  std::ostream& os;
 		  typedef ConstMap<typename Graph::Node,dim2::Point<double> > CoordsMapType;
 		  CoordsMapType _coords;
 		  ConstMap<typename Graph::Node,double > _nodeSizes;
 		  ConstMap<typename Graph::Node,int > _nodeShapes;
 		  ConstMap<typename Graph::Node,Color > _nodeColors;
 		  ConstMap<typename Graph::Arc,Color > _arcColors;
 		  ConstMap<typename Graph::Arc,double > _arcWidths;
 		  double _arcWidthScale;
 		  double _nodeScale;
 		  double _xBorder, _yBorder;
 		  double _scale;
 		  double _nodeBorderQuotient;
 		  bool _drawArrows;
 		  double _arrowLength, _arrowWidth;
 		  bool _showNodes, _showArcs;
 		  bool _enableParallel;
 		  double _parArcDist;
 		  bool _showNodeText;
 		  ConstMap<typename Graph::Node,bool > _nodeTexts;
 		  double _nodeTextSize;
 		  bool _showNodePsText;
 		  ConstMap<typename Graph::Node,bool > _nodePsTexts;
 		  char *_nodePsTextsPreamble;
 		  bool _undirected;
 		  bool _pleaseRemoveOsStream;
 		  bool _scaleToA4;
 		  std::string _title;
 		  std::string _copyright;
 		  enum NodeTextColorType
 		    { DIST_COL=0, DIST_BW=1, CUST_COL=2, SAME_COL=3 } _nodeTextColorType;
 		  ConstMap<typename Graph::Node,Color > _nodeTextColors;
 		  bool _autoNodeScale;
 		  bool _autoArcWidthScale;
 		  bool _absoluteNodeSizes;
 		  bool _absoluteArcWidths;
 		  bool _negY;
@@ -1073,119 +1074,129 @@
 		  ///\name Aliases
 		  ///These are just some aliases to other parameter setting functions.
 		  ///@{
 		  ///An alias for arcWidths()
 		  template<class X> GraphToEps<ArcWidthsTraits<X> > edgeWidths(const X &x)
+		  {
 		    return arcWidths(x);
+		  }
 		  ///An alias for arcColors()
 		  template<class X> GraphToEps<ArcColorsTraits<X> >
 		  edgeColors(const X &x)
+		  {
 		    return arcColors(x);
+		  }
 		  ///An alias for arcWidthScale()
 		  GraphToEps<T> &edgeWidthScale(double d) {return arcWidthScale(d);}
 		  ///An alias for autoArcWidthScale()
 		  GraphToEps<T> &autoEdgeWidthScale(bool b=true)
+		  {
 		    return autoArcWidthScale(b);
+		  }
 		  ///An alias for absoluteArcWidths()
 		  GraphToEps<T> &absoluteEdgeWidths(bool b=true)
+		  {
 		    return absoluteArcWidths(b);
+		  }
 		  ///An alias for parArcDist()
 		  GraphToEps<T> &parEdgeDist(double d) {return parArcDist(d);}
 		  ///An alias for hideArcs()
 		  GraphToEps<T> &hideEdges(bool b=true) {return hideArcs(b);}
 		  ///@}
 		};
 		template<class T>
 		const int GraphToEps<T>::INTERPOL_PREC = 20;
 		template<class T>
 		const double GraphToEps<T>::A4HEIGHT = 841.8897637795276;
 		template<class T>
 		const double GraphToEps<T>::A4WIDTH  = 595.275590551181;
 		template<class T>
 		const double GraphToEps<T>::A4BORDER = 15;
 		///Generates an EPS file from a graph
 		///\ingroup eps_io
 		///Generates an EPS file from a graph.
 		///\param g Reference to the graph to be printed.
 		///\param os Reference to the output stream.
 		///By default it is <tt>std::cout</tt>.
 		///
 		///This function also has a lot of
 		///\ref named-templ-func-param "named parameters",
 		///they are declared as the members of class \ref GraphToEps. The following
 		///example shows how to use these parameters.
 		///\code
 		/// graphToEps(g,os).scale(10).coords(coords)
 		///              .nodeScale(2).nodeSizes(sizes)
 		///              .arcWidthScale(.4).run();
 		///\endcode
 		///
 		///For more detailed examples see the \ref graph_to_eps_demo.cc demo file.
 		///
 		///\warning Don't forget to put the \ref GraphToEps::run() "run()"
 		///to the end of the parameter list.
 		///\sa GraphToEps
 		///\sa graphToEps(G &g, const char *file_name)
 		template<class G>
 		GraphToEps<DefaultGraphToEpsTraits<G> >
 		graphToEps(G &g, std::ostream& os=std::cout)
+		{
 		  return
 		    GraphToEps<DefaultGraphToEpsTraits<G> >(DefaultGraphToEpsTraits<G>(g,os));
+		}
 		///Generates an EPS file from a graph
 		///\ingroup eps_io
 		///This function does the same as
 		///\ref graphToEps(G &g,std::ostream& os)
 		///but it writes its output into the file \c file_name
 		///instead of a stream.
 		///\sa graphToEps(G &g, std::ostream& os)
 		template<class G>
 		GraphToEps<DefaultGraphToEpsTraits<G> >
 		graphToEps(G &g,const char *file_name)
+		{
 		  std::ostream* os = new std::ofstream(file_name);
 		  if (!(*os)) {
 		    delete os;
 		    throw IoError("Cannot write file", file_name);
+		  }
 		  return GraphToEps<DefaultGraphToEpsTraits<G> >
-		    (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name),true));
+		    (DefaultGraphToEpsTraits<G>(g,*os,true));
+		}
 		///Generates an EPS file from a graph
 		///\ingroup eps_io
 		///This function does the same as
 		///\ref graphToEps(G &g,std::ostream& os)
 		///but it writes its output into the file \c file_name
 		///instead of a stream.
 		///\sa graphToEps(G &g, std::ostream& os)
 		template<class G>
 		GraphToEps<DefaultGraphToEpsTraits<G> >
 		graphToEps(G &g,const std::string& file_name)
+		{
 		  std::ostream* os = new std::ofstream(file_name.c_str());
 		  if (!(*os)) {
 		    delete os;
 		    throw IoError("Cannot write file", file_name);
+		  }
 		  return GraphToEps<DefaultGraphToEpsTraits<G> >
-		    (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name.c_str()),true));
+		    (DefaultGraphToEpsTraits<G>(g,*os,true));
+		}
 		} //END OF NAMESPACE LEMON
 		#endif // LEMON_GRAPH_TO_EPS_H

lemon/lgf_reader.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		///\ingroup lemon_io
 		///\file
 		///\brief \ref lgf-format "LEMON Graph Format" reader.
 		#ifndef LEMON_LGF_READER_H
 		#define LEMON_LGF_READER_H
 		#include <iostream>
 		#include <fstream>
 		#include <sstream>
 		#include <set>
 		#include <map>
 		#include <lemon/assert.h>
 		#include <lemon/core.h>
 		#include <lemon/lgf_writer.h>
 		#include <lemon/concept_check.h>
 		#include <lemon/concepts/maps.h>
 		namespace lemon {
 		  namespace _reader_bits {
 		    template <typename Value>
 		    struct DefaultConverter {
 		      Value operator()(const std::string& str) {
 		        std::istringstream is(str);
 		        Value value;
-		        is >> value;
+		        if (!(is >> value)) {
 		          throw FormatError("Cannot read token");
+		        }
 		        char c;
 		        if (is >> std::ws >> c) {
-		          throw DataFormatError("Remaining characters in token");
+		          throw FormatError("Remaining characters in token");
+		        }
 		        return value;
+		      }
 		    };
 		    template <>
 		    struct DefaultConverter<std::string> {
 		      std::string operator()(const std::string& str) {
 		        return str;
+		      }
 		    };
 		    template <typename _Item>
 		    class MapStorageBase {
 		    public:
 		      typedef _Item Item;
 		    public:
 		      MapStorageBase() {}
 		      virtual ~MapStorageBase() {}
 		      virtual void set(const Item& item, const std::string& value) = 0;
 		    };
 		    template <typename _Item, typename _Map,
 		              typename _Converter = DefaultConverter<typename _Map::Value> >
 		    class MapStorage : public MapStorageBase<_Item> {
 		    public:
 		      typedef _Map Map;
 		      typedef _Converter Converter;
 		      typedef _Item Item;
 		    private:
 		      Map& _map;
 		      Converter _converter;
 		    public:
 		      MapStorage(Map& map, const Converter& converter = Converter())
 		        : _map(map), _converter(converter) {}
 		      virtual ~MapStorage() {}
 		      virtual void set(const Item& item ,const std::string& value) {
 		        _map.set(item, _converter(value));
+		      }
 		    };
 		    template <typename _Graph, bool _dir, typename _Map,
 		              typename _Converter = DefaultConverter<typename _Map::Value> >
 		    class GraphArcMapStorage : public MapStorageBase<typename _Graph::Edge> {
 		    public:
 		      typedef _Map Map;
 		      typedef _Converter Converter;
 		      typedef _Graph Graph;
 		      typedef typename Graph::Edge Item;
 		      static const bool dir = _dir;
 		    private:
 		      const Graph& _graph;
 		      Map& _map;
 		      Converter _converter;
 		    public:
 		      GraphArcMapStorage(const Graph& graph, Map& map,
 		                         const Converter& converter = Converter())
 		        : _graph(graph), _map(map), _converter(converter) {}
 		      virtual ~GraphArcMapStorage() {}
 		      virtual void set(const Item& item ,const std::string& value) {
 		        _map.set(_graph.direct(item, dir), _converter(value));
+		      }
 		    };
 		    class ValueStorageBase {
 		    public:
 		      ValueStorageBase() {}
 		      virtual ~ValueStorageBase() {}
 		      virtual void set(const std::string&) = 0;
 		    };
 		    template <typename _Value, typename _Converter = DefaultConverter<_Value> >
 		    class ValueStorage : public ValueStorageBase {
 		    public:
 		      typedef _Value Value;
 		      typedef _Converter Converter;
 		    private:
 		      Value& _value;
 		      Converter _converter;
 		    public:
 		      ValueStorage(Value& value, const Converter& converter = Converter())
 		        : _value(value), _converter(converter) {}
 		      virtual void set(const std::string& value) {
 		        _value = _converter(value);
+		      }
 		    };
 		    template <typename Value>
 		    struct MapLookUpConverter {
 		      const std::map<std::string, Value>& _map;
 		      MapLookUpConverter(const std::map<std::string, Value>& map)
 		        : _map(map) {}
 		      Value operator()(const std::string& str) {
 		        typename std::map<std::string, Value>::const_iterator it =
 		          _map.find(str);
 		        if (it == _map.end()) {
 		          std::ostringstream msg;
 		          msg << "Item not found: " << str;
-		          throw DataFormatError(msg.str().c_str());
+		          throw FormatError(msg.str());
+		        }
 		        return it->second;
+		      }
 		    };
 		    template <typename Graph>
 		    struct GraphArcLookUpConverter {
 		      const Graph& _graph;
 		      const std::map<std::string, typename Graph::Edge>& _map;
 		      GraphArcLookUpConverter(const Graph& graph,
 		                              const std::map<std::string,
 		                                             typename Graph::Edge>& map)
 		        : _graph(graph), _map(map) {}
 		      typename Graph::Arc operator()(const std::string& str) {
 		        if (str.empty() || (str[0] != '+' && str[0] != '-')) {
-		          throw DataFormatError("Item must start with '+' or '-'");
+		          throw FormatError("Item must start with '+' or '-'");
+		        }
 		        typename std::map<std::string, typename Graph::Edge>
 		          ::const_iterator it = _map.find(str.substr(1));
 		        if (it == _map.end()) {
-		          throw DataFormatError("Item not found");
+		          throw FormatError("Item not found");
+		        }
 		        return _graph.direct(it->second, str[0] == '+');
+		      }
 		    };
 		    inline bool isWhiteSpace(char c) {
 		      return c == ' ' || c == '\t' || c == '\v' ||
 		        c == '\n' || c == '\r' || c == '\f';
+		    }
 		    inline bool isOct(char c) {
 		      return '0' <= c && c <='7';
+		    }
 		    inline int valueOct(char c) {
 		      LEMON_ASSERT(isOct(c), "The character is not octal.");
 		      return c - '0';
+		    }
 		    inline bool isHex(char c) {
 		      return ('0' <= c && c <= '9') ||
 		        ('a' <= c && c <= 'z') ||
 		        ('A' <= c && c <= 'Z');
+		    }
 		    inline int valueHex(char c) {
 		      LEMON_ASSERT(isHex(c), "The character is not hexadecimal.");
 		      if ('0' <= c && c <= '9') return c - '0';
 		      if ('a' <= c && c <= 'z') return c - 'a' + 10;
 		      return c - 'A' + 10;
+		    }
 		    inline bool isIdentifierFirstChar(char c) {
 		      return ('a' <= c && c <= 'z') ||
 		        ('A' <= c && c <= 'Z') || c == '_';
+		    }
 		    inline bool isIdentifierChar(char c) {
 		      return isIdentifierFirstChar(c) ||
 		        ('0' <= c && c <= '9');
+		    }
 		    inline char readEscape(std::istream& is) {
 		      char c;
 		      if (!is.get(c))
-		        throw DataFormatError("Escape format error");
+		        throw FormatError("Escape format error");
 		      switch (c) {
 		      case '\\':
 		        return '\\';
 		      case '\"':
 		        return '\"';
 		      case '\'':
 		        return '\'';
 		      case '\?':
 		        return '\?';
 		      case 'a':
 		        return '\a';
 		      case 'b':
 		        return '\b';
 		      case 'f':
 		        return '\f';
 		      case 'n':
 		        return '\n';
 		      case 'r':
 		        return '\r';
 		      case 't':
 		        return '\t';
 		      case 'v':
 		        return '\v';
 		      case 'x':
+		        {
 		          int code;
 		          if (!is.get(c) || !isHex(c))
-		            throw DataFormatError("Escape format error");
+		            throw FormatError("Escape format error");
 		          else if (code = valueHex(c), !is.get(c) || !isHex(c)) is.putback(c);
 		          else code = code * 16 + valueHex(c);
 		          return code;
+		        }
 		      default:
+		        {
 		          int code;
 		          if (!isOct(c))
-		            throw DataFormatError("Escape format error");
+		            throw FormatError("Escape format error");
 		          else if (code = valueOct(c), !is.get(c) || !isOct(c))
 		            is.putback(c);
 		          else if (code = code * 8 + valueOct(c), !is.get(c) || !isOct(c))
 		            is.putback(c);
 		          else code = code * 8 + valueOct(c);
 		          return code;
+		        }
+		      }
+		    }
 		    inline std::istream& readToken(std::istream& is, std::string& str) {
 		      std::ostringstream os;
 		      char c;
 		      is >> std::ws;
 		      if (!is.get(c))
 		        return is;
 		      if (c == '\"') {
 		        while (is.get(c) && c != '\"') {
 		          if (c == '\\')
 		            c = readEscape(is);
 		          os << c;
+		        }
 		        if (!is)
-		          throw DataFormatError("Quoted format error");
+		          throw FormatError("Quoted format error");
 		      } else {
 		        is.putback(c);
 		        while (is.get(c) && !isWhiteSpace(c)) {
 		          if (c == '\\')
 		            c = readEscape(is);
 		          os << c;
+		        }
 		        if (!is) {
 		          is.clear();
 		        } else {
 		          is.putback(c);
+		        }
+		      }
 		      str = os.str();
 		      return is;
+		    }
 		    class Section {
 		    public:
 		      virtual ~Section() {}
 		      virtual void process(std::istream& is, int& line_num) = 0;
 		    };
 		    template <typename Functor>
 		    class LineSection : public Section {
 		    private:
 		      Functor _functor;
 		    public:
 		      LineSection(const Functor& functor) : _functor(functor) {}
 		      virtual ~LineSection() {}
 		      virtual void process(std::istream& is, int& line_num) {
 		        char c;
 		        std::string line;
 		        while (is.get(c) && c != '@') {
 		          if (c == '\n') {
 		            ++line_num;
 		          } else if (c == '#') {
 		            getline(is, line);
 		            ++line_num;
 		          } else if (!isWhiteSpace(c)) {
 		            is.putback(c);
 		            getline(is, line);
 		            _functor(line);
 		            ++line_num;
+		          }
+		        }
 		        if (is) is.putback(c);
 		        else if (is.eof()) is.clear();
+		      }
 		    };
 		    template <typename Functor>
 		    class StreamSection : public Section {
 		    private:
 		      Functor _functor;
 		    public:
 		      StreamSection(const Functor& functor) : _functor(functor) {}
 		      virtual ~StreamSection() {}
 		      virtual void process(std::istream& is, int& line_num) {
 		        _functor(is, line_num);
 		        char c;
 		        std::string line;
 		        while (is.get(c) && c != '@') {
 		          if (c == '\n') {
 		            ++line_num;
 		          } else if (!isWhiteSpace(c)) {
 		            getline(is, line);
 		            ++line_num;
+		          }
+		        }
 		        if (is) is.putback(c);
 		        else if (is.eof()) is.clear();
+		      }
 		    };
+		  }
 		  template <typename Digraph>
 		  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);
 		  /// \ingroup lemon_io
 		  ///
 		  /// \brief \ref lgf-format "LGF" reader for directed graphs
 		  ///
 		  /// This utility reads an \ref lgf-format "LGF" file.
 		  ///
 		  /// The reading method does a batch processing. The user creates a
 		  /// reader object, then various reading rules can be added to the
 		  /// reader, and eventually the reading is executed with the \c run()
 		  /// member function. A map reading rule can be added to the reader
 		  /// with the \c nodeMap() or \c arcMap() members. An optional
 		  /// converter parameter can also be added as a standard functor
 		  /// converting from \c std::string to the value type of the map. If it
 		  /// is set, it will determine how the tokens in the file should be
 		  /// converted to the value type of the map. If the functor is not set,
 		  /// then a default conversion will be used. One map can be read into
 		  /// multiple map objects at the same time. The \c attribute(), \c
 		  /// node() and \c arc() functions are used to add attribute reading
 		  /// rules.
 		  ///
 		  ///\code
 		  /// DigraphReader<Digraph>(digraph, std::cin).
 		  ///   nodeMap("coordinates", coord_map).
 		  ///   arcMap("capacity", cap_map).
 		  ///   node("source", src).
 		  ///   node("target", trg).
 		  ///   attribute("caption", caption).
 		  ///   run();
 		  ///\endcode
 		  ///
 		  /// By default the reader uses the first section in the file of the
 		  /// proper type. If a section has an optional name, then it can be
 		  /// selected for reading by giving an optional name parameter to the
 		  /// \c nodes(), \c arcs() or \c attributes() functions.
 		  ///
 		  /// The \c useNodes() and \c useArcs() functions are used to tell the reader
 		  /// that the nodes or arcs should not be constructed (added to the
 		  /// graph) during the reading, but instead the label map of the items
 		  /// are given as a parameter of these functions. An
 		  /// application of these functions is multipass reading, which is
 		  /// important if two \c \@arcs sections must be read from the
 		  /// file. In this case the first phase would read the node set and one
 		  /// of the arc sets, while the second phase would read the second arc
 		  /// set into an \e ArcSet class (\c SmartArcSet or \c ListArcSet).
 		  /// The previously read label node map should be passed to the \c
 		  /// useNodes() functions. Another application of multipass reading when
 		  /// paths are given as a node map or an arc map.
 		  /// It is impossible to read this in
 		  /// a single pass, because the arcs are not constructed when the node
 		  /// maps are read.
 		  template <typename _Digraph>
 		  class DigraphReader {
 		  public:
 		    typedef _Digraph Digraph;
 		    TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);
 		  private:
 		    std::istream* _is;
 		    bool local_is;
 		    std::string _filename;
 		    Digraph& _digraph;
 		    std::string _nodes_caption;
 		    std::string _arcs_caption;
 		    std::string _attributes_caption;
 		    typedef std::map<std::string, Node> NodeIndex;
 		    NodeIndex _node_index;
 		    typedef std::map<std::string, Arc> ArcIndex;
 		    ArcIndex _arc_index;
 		    typedef std::vector<std::pair<std::string,
 		      _reader_bits::MapStorageBase<Node>*> > NodeMaps;
 		    NodeMaps _node_maps;
 		    typedef std::vector<std::pair<std::string,
 		      _reader_bits::MapStorageBase<Arc>*> >ArcMaps;
 		    ArcMaps _arc_maps;
 		    typedef std::multimap<std::string, _reader_bits::ValueStorageBase*>
 		      Attributes;
 		    Attributes _attributes;
 		    bool _use_nodes;
 		    bool _use_arcs;
 		    bool _skip_nodes;
 		    bool _skip_arcs;
 		    int line_num;
 		    std::istringstream line;
 		  public:
 		    /// \brief Constructor
 		    ///
 		    /// Construct a directed graph reader, which reads from the given
 		    /// input stream.
 		    DigraphReader(Digraph& 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) {}
 		    /// \brief Constructor
 		    ///
 		    /// Construct a directed graph reader, which reads from the given
 		    /// file.
 		    DigraphReader(Digraph& digraph, const std::string& fn)
-		      : _is(new std::ifstream(fn.c_str())), local_is(true), _digraph(digraph),
 		      : _is(new std::ifstream(fn.c_str())), local_is(true),
 		        _filename(fn), _digraph(digraph),
 		        _use_nodes(false), _use_arcs(false),
-		        _skip_nodes(false), _skip_arcs(false) {}
 		        _skip_nodes(false), _skip_arcs(false) {
 		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Constructor
 		    ///
 		    /// Construct a directed graph reader, which reads from the given
 		    /// file.
 		    DigraphReader(Digraph& digraph, const char* fn)
-		      : _is(new std::ifstream(fn)), local_is(true), _digraph(digraph),
 		      : _is(new std::ifstream(fn)), local_is(true),
 		        _filename(fn), _digraph(digraph),
 		        _use_nodes(false), _use_arcs(false),
-		        _skip_nodes(false), _skip_arcs(false) {}
 		        _skip_nodes(false), _skip_arcs(false) {
 		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Destructor
 		    ~DigraphReader() {
 		      for (typename NodeMaps::iterator it = _node_maps.begin();
 		           it != _node_maps.end(); ++it) {
 		        delete it->second;
+		      }
 		      for (typename ArcMaps::iterator it = _arc_maps.begin();
 		           it != _arc_maps.end(); ++it) {
 		        delete it->second;
+		      }
 		      for (typename Attributes::iterator it = _attributes.begin();
 		           it != _attributes.end(); ++it) {
 		        delete it->second;
+		      }
 		      if (local_is) {
 		        delete _is;
+		      }
+		    }
 		  private:
 		    friend DigraphReader<Digraph> digraphReader<>(Digraph& digraph,
 		                                                  std::istream& is);
 		    friend DigraphReader<Digraph> digraphReader<>(Digraph& digraph,
 		                                                  const std::string& fn);
 		    friend DigraphReader<Digraph> digraphReader<>(Digraph& digraph,
 		                                                  const char *fn);
 		    DigraphReader(DigraphReader& other)
 		      : _is(other._is), local_is(other.local_is), _digraph(other._digraph),
 		        _use_nodes(other._use_nodes), _use_arcs(other._use_arcs),
 		        _skip_nodes(other._skip_nodes), _skip_arcs(other._skip_arcs) {
 		      other._is = 0;
 		      other.local_is = false;
 		      _node_index.swap(other._node_index);
 		      _arc_index.swap(other._arc_index);
 		      _node_maps.swap(other._node_maps);
 		      _arc_maps.swap(other._arc_maps);
 		      _attributes.swap(other._attributes);
 		      _nodes_caption = other._nodes_caption;
 		      _arcs_caption = other._arcs_caption;
 		      _attributes_caption = other._attributes_caption;
+		    }
 		    DigraphReader& operator=(const DigraphReader&);
 		  public:
 		    /// \name Reading rules
 		    /// @{
 		    /// \brief Node map reading rule
 		    ///
 		    /// Add a node map reading rule to the reader.
 		    template <typename Map>
 		    DigraphReader& nodeMap(const std::string& caption, Map& map) {
 		      checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>();
 		      _reader_bits::MapStorageBase<Node>* storage =
 		        new _reader_bits::MapStorage<Node, Map>(map);
 		      _node_maps.push_back(std::make_pair(caption, storage));
 		      return *this;
+		    }
 		    /// \brief Node map reading rule
 		    ///
 		    /// Add a node map reading rule with specialized converter to the
 		    /// reader.
 		    template <typename Map, typename Converter>
 		    DigraphReader& nodeMap(const std::string& caption, Map& map,
 		                           const Converter& converter = Converter()) {
 		      checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>();
 		      _reader_bits::MapStorageBase<Node>* storage =
 		        new _reader_bits::MapStorage<Node, Map, Converter>(map, converter);
 		      _node_maps.push_back(std::make_pair(caption, storage));
 		      return *this;
+		    }
 		    /// \brief Arc map reading rule
 		    ///
 		    /// Add an arc map reading rule to the reader.
 		    template <typename Map>
 		    DigraphReader& arcMap(const std::string& caption, Map& map) {
 		      checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>();
 		      _reader_bits::MapStorageBase<Arc>* storage =
 		        new _reader_bits::MapStorage<Arc, Map>(map);
 		      _arc_maps.push_back(std::make_pair(caption, storage));
@@ -753,654 +762,659 @@
 		    /// \brief Use previously constructed arc set
 		    ///
 		    /// Use previously constructed arc set, and specify the arc
 		    /// label map.
 		    template <typename Map>
 		    DigraphReader& useArcs(const Map& map) {
 		      checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>();
 		      LEMON_ASSERT(!_use_arcs, "Multiple usage of useArcs() member");
 		      _use_arcs = true;
 		      _writer_bits::DefaultConverter<typename Map::Value> converter;
 		      for (ArcIt a(_digraph); a != INVALID; ++a) {
 		        _arc_index.insert(std::make_pair(converter(map[a]), a));
+		      }
 		      return *this;
+		    }
 		    /// \brief Use previously constructed arc set
 		    ///
 		    /// Use previously constructed arc set, and specify the arc
 		    /// label map and a functor which converts the label map values to
 		    /// \c std::string.
 		    template <typename Map, typename Converter>
 		    DigraphReader& useArcs(const Map& map,
 		                           const Converter& converter = Converter()) {
 		      checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>();
 		      LEMON_ASSERT(!_use_arcs, "Multiple usage of useArcs() member");
 		      _use_arcs = true;
 		      for (ArcIt a(_digraph); a != INVALID; ++a) {
 		        _arc_index.insert(std::make_pair(converter(map[a]), a));
+		      }
 		      return *this;
+		    }
 		    /// \brief Skips the reading of node section
 		    ///
 		    /// Omit the reading of the node section. This implies that each node
 		    /// map reading rule will be abandoned, and the nodes of the graph
 		    /// will not be constructed, which usually cause that the arc set
 		    /// could not be read due to lack of node name resolving.
 		    /// Therefore \c skipArcs() function should also be used, or
 		    /// \c useNodes() should be used to specify the label of the nodes.
 		    DigraphReader& skipNodes() {
 		      LEMON_ASSERT(!_skip_nodes, "Skip nodes already set");
 		      _skip_nodes = true;
 		      return *this;
+		    }
 		    /// \brief Skips the reading of arc section
 		    ///
 		    /// Omit the reading of the arc section. This implies that each arc
 		    /// map reading rule will be abandoned, and the arcs of the graph
 		    /// will not be constructed.
 		    DigraphReader& skipArcs() {
 		      LEMON_ASSERT(!_skip_arcs, "Skip arcs already set");
 		      _skip_arcs = true;
 		      return *this;
+		    }
 		    /// @}
 		  private:
 		    bool readLine() {
 		      std::string str;
 		      while(++line_num, std::getline(*_is, str)) {
 		        line.clear(); line.str(str);
 		        char c;
 		        if (line >> std::ws >> c && c != '#') {
 		          line.putback(c);
 		          return true;
+		        }
+		      }
 		      return false;
+		    }
 		    bool readSuccess() {
 		      return static_cast<bool>(*_is);
+		    }
 		    void skipSection() {
 		      char c;
 		      while (readSuccess() && line >> c && c != '@') {
 		        readLine();
+		      }
 		      line.putback(c);
+		    }
 		    void readNodes() {
 		      std::vector<int> map_index(_node_maps.size());
 		      int map_num, label_index;
 		      char c;
 		      if (!readLine() || !(line >> c) || c == '@') {
 		        if (readSuccess() && line) line.putback(c);
 		        if (!_node_maps.empty())
-		          throw DataFormatError("Cannot find map names");
+		          throw FormatError("Cannot find map names");
 		        return;
+		      }
 		      line.putback(c);
+		      {
 		        std::map<std::string, int> maps;
 		        std::string map;
 		        int index = 0;
 		        while (_reader_bits::readToken(line, map)) {
 		          if (maps.find(map) != maps.end()) {
 		            std::ostringstream msg;
 		            msg << "Multiple occurence of node map: " << map;
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
 		          maps.insert(std::make_pair(map, index));
 		          ++index;
+		        }
 		        for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) {
 		          std::map<std::string, int>::iterator jt =
 		            maps.find(_node_maps[i].first);
 		          if (jt == maps.end()) {
 		            std::ostringstream msg;
 		            msg << "Map not found in file: " << _node_maps[i].first;
 		            throw DataFormatError(msg.str().c_str());
 		            msg << "Map not found: " << _node_maps[i].first;
 		            throw FormatError(msg.str());
+		          }
 		          map_index[i] = jt->second;
+		        }
+		        {
 		          std::map<std::string, int>::iterator jt = maps.find("label");
 		          if (jt != maps.end()) {
 		            label_index = jt->second;
 		          } else {
 		            label_index = -1;
+		          }
+		        }
 		        map_num = maps.size();
+		      }
 		      while (readLine() && line >> c && c != '@') {
 		        line.putback(c);
 		        std::vector<std::string> tokens(map_num);
 		        for (int i = 0; i < map_num; ++i) {
 		          if (!_reader_bits::readToken(line, tokens[i])) {
 		            std::ostringstream msg;
 		            msg << "Column not found (" << i + 1 << ")";
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
+		        }
 		        if (line >> std::ws >> c)
-		          throw DataFormatError("Extra character on the end of line");
+		          throw FormatError("Extra character at the end of line");
 		        Node n;
 		        if (!_use_nodes) {
 		          n = _digraph.addNode();
 		          if (label_index != -1)
 		            _node_index.insert(std::make_pair(tokens[label_index], n));
 		        } else {
 		          if (label_index == -1)
-		            throw DataFormatError("Label map not found in file");
+		            throw FormatError("Label map not found");
 		          typename std::map<std::string, Node>::iterator it =
 		            _node_index.find(tokens[label_index]);
 		          if (it == _node_index.end()) {
 		            std::ostringstream msg;
 		            msg << "Node with label not found: " << tokens[label_index];
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
 		          n = it->second;
+		        }
 		        for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) {
 		          _node_maps[i].second->set(n, tokens[map_index[i]]);
+		        }
+		      }
 		      if (readSuccess()) {
 		        line.putback(c);
+		      }
+		    }
 		    void readArcs() {
 		      std::vector<int> map_index(_arc_maps.size());
 		      int map_num, label_index;
 		      char c;
 		      if (!readLine() || !(line >> c) || c == '@') {
 		        if (readSuccess() && line) line.putback(c);
 		        if (!_arc_maps.empty())
-		          throw DataFormatError("Cannot find map names");
+		          throw FormatError("Cannot find map names");
 		        return;
+		      }
 		      line.putback(c);
+		      {
 		        std::map<std::string, int> maps;
 		        std::string map;
 		        int index = 0;
 		        while (_reader_bits::readToken(line, map)) {
 		          if (maps.find(map) != maps.end()) {
 		            std::ostringstream msg;
 		            msg << "Multiple occurence of arc map: " << map;
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
 		          maps.insert(std::make_pair(map, index));
 		          ++index;
+		        }
 		        for (int i = 0; i < static_cast<int>(_arc_maps.size()); ++i) {
 		          std::map<std::string, int>::iterator jt =
 		            maps.find(_arc_maps[i].first);
 		          if (jt == maps.end()) {
 		            std::ostringstream msg;
 		            msg << "Map not found in file: " << _arc_maps[i].first;
 		            throw DataFormatError(msg.str().c_str());
 		            msg << "Map not found: " << _arc_maps[i].first;
 		            throw FormatError(msg.str());
+		          }
 		          map_index[i] = jt->second;
+		        }
+		        {
 		          std::map<std::string, int>::iterator jt = maps.find("label");
 		          if (jt != maps.end()) {
 		            label_index = jt->second;
 		          } else {
 		            label_index = -1;
+		          }
+		        }
 		        map_num = maps.size();
+		      }
 		      while (readLine() && line >> c && c != '@') {
 		        line.putback(c);
 		        std::string source_token;
 		        std::string target_token;
 		        if (!_reader_bits::readToken(line, source_token))
-		          throw DataFormatError("Source not found");
+		          throw FormatError("Source not found");
 		        if (!_reader_bits::readToken(line, target_token))
-		          throw DataFormatError("Target not found");
+		          throw FormatError("Target not found");
 		        std::vector<std::string> tokens(map_num);
 		        for (int i = 0; i < map_num; ++i) {
 		          if (!_reader_bits::readToken(line, tokens[i])) {
 		            std::ostringstream msg;
 		            msg << "Column not found (" << i + 1 << ")";
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
+		        }
 		        if (line >> std::ws >> c)
-		          throw DataFormatError("Extra character on the end of line");
+		          throw FormatError("Extra character at the end of line");
 		        Arc a;
 		        if (!_use_arcs) {
 		          typename NodeIndex::iterator it;
 		          it = _node_index.find(source_token);
 		          if (it == _node_index.end()) {
 		            std::ostringstream msg;
 		            msg << "Item not found: " << source_token;
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
 		          Node source = it->second;
 		          it = _node_index.find(target_token);
 		          if (it == _node_index.end()) {
 		            std::ostringstream msg;
 		            msg << "Item not found: " << target_token;
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
 		          Node target = it->second;
 		          a = _digraph.addArc(source, target);
 		          if (label_index != -1)
 		            _arc_index.insert(std::make_pair(tokens[label_index], a));
 		        } else {
 		          if (label_index == -1)
-		            throw DataFormatError("Label map not found in file");
+		            throw FormatError("Label map not found");
 		          typename std::map<std::string, Arc>::iterator it =
 		            _arc_index.find(tokens[label_index]);
 		          if (it == _arc_index.end()) {
 		            std::ostringstream msg;
 		            msg << "Arc with label not found: " << tokens[label_index];
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
 		          a = it->second;
+		        }
 		        for (int i = 0; i < static_cast<int>(_arc_maps.size()); ++i) {
 		          _arc_maps[i].second->set(a, tokens[map_index[i]]);
+		        }
+		      }
 		      if (readSuccess()) {
 		        line.putback(c);
+		      }
+		    }
 		    void readAttributes() {
 		      std::set<std::string> read_attr;
 		      char c;
 		      while (readLine() && line >> c && c != '@') {
 		        line.putback(c);
 		        std::string attr, token;
 		        if (!_reader_bits::readToken(line, attr))
-		          throw DataFormatError("Attribute name not found");
+		          throw FormatError("Attribute name not found");
 		        if (!_reader_bits::readToken(line, token))
-		          throw DataFormatError("Attribute value not found");
+		          throw FormatError("Attribute value not found");
 		        if (line >> c)
-		          throw DataFormatError("Extra character on the end of line");
+		          throw FormatError("Extra character at the end of line");
+		        {
 		          std::set<std::string>::iterator it = read_attr.find(attr);
 		          if (it != read_attr.end()) {
 		            std::ostringstream msg;
 		            msg << "Multiple occurence of attribute " << attr;
 		            throw DataFormatError(msg.str().c_str());
 		            msg << "Multiple occurence of attribute: " << attr;
 		            throw FormatError(msg.str());
+		          }
 		          read_attr.insert(attr);
+		        }
+		        {
 		          typename Attributes::iterator it = _attributes.lower_bound(attr);
 		          while (it != _attributes.end() && it->first == attr) {
 		            it->second->set(token);
 		            ++it;
+		          }
+		        }
+		      }
 		      if (readSuccess()) {
 		        line.putback(c);
+		      }
 		      for (typename Attributes::iterator it = _attributes.begin();
 		           it != _attributes.end(); ++it) {
 		        if (read_attr.find(it->first) == read_attr.end()) {
 		          std::ostringstream msg;
 		          msg << "Attribute not found in file: " << it->first;
 		          throw DataFormatError(msg.str().c_str());
 		          msg << "Attribute not found: " << it->first;
 		          throw FormatError(msg.str());
+		        }
+		      }
+		    }
 		  public:
 		    /// \name Execution of the reader
 		    /// @{
 		    /// \brief Start the batch processing
 		    ///
 		    /// This function starts the batch processing
 		    void run() {
 		      LEMON_ASSERT(_is != 0, "This reader assigned to an other reader");
 		      if (!*_is) {
 		        throw DataFormatError("Cannot find file");
+		      }
 		      bool nodes_done = _skip_nodes;
 		      bool arcs_done = _skip_arcs;
 		      bool attributes_done = false;
 		      line_num = 0;
 		      readLine();
 		      skipSection();
 		      while (readSuccess()) {
 		        try {
 		          char c;
 		          std::string section, caption;
 		          line >> c;
 		          _reader_bits::readToken(line, section);
 		          _reader_bits::readToken(line, caption);
 		          if (line >> c)
-		            throw DataFormatError("Extra character on the end of line");
+		            throw FormatError("Extra character at the end of line");
 		          if (section == "nodes" && !nodes_done) {
 		            if (_nodes_caption.empty() || _nodes_caption == caption) {
 		              readNodes();
 		              nodes_done = true;
+		            }
 		          } else if ((section == "arcs" || section == "edges") &&
 		                     !arcs_done) {
 		            if (_arcs_caption.empty() || _arcs_caption == caption) {
 		              readArcs();
 		              arcs_done = true;
+		            }
 		          } else if (section == "attributes" && !attributes_done) {
 		            if (_attributes_caption.empty() || _attributes_caption == caption) {
 		              readAttributes();
 		              attributes_done = true;
+		            }
 		          } else {
 		            readLine();
 		            skipSection();
+		          }
-		        } catch (DataFormatError& error) {
+		        } catch (FormatError& error) {
 		          error.line(line_num);
 		          error.file(_filename);
 		          throw;
+		        }
+		      }
 		      if (!nodes_done) {
-		        throw DataFormatError("Section @nodes not found");
+		        throw FormatError("Section @nodes not found");
+		      }
 		      if (!arcs_done) {
-		        throw DataFormatError("Section @arcs not found");
+		        throw FormatError("Section @arcs not found");
+		      }
 		      if (!attributes_done && !_attributes.empty()) {
-		        throw DataFormatError("Section @attributes not found");
+		        throw FormatError("Section @attributes not found");
+		      }
+		    }
 		    /// @}
 		  };
 		  /// \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 = std::cin) {
 		    DigraphReader<Digraph> 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,
 		                                       const std::string& fn) {
 		    DigraphReader<Digraph> 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>
 		  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);
 		  /// \ingroup lemon_io
 		  ///
 		  /// \brief \ref lgf-format "LGF" reader for undirected graphs
 		  ///
 		  /// This utility reads an \ref lgf-format "LGF" file.
 		  ///
 		  /// It can be used almost the same way as \c DigraphReader.
 		  /// The only difference is that this class can handle edges and
 		  /// edge maps as well as arcs and arc maps.
 		  ///
 		  /// The columns in the \c \@edges (or \c \@arcs) section are the
 		  /// edge maps. However, if there are two maps with the same name
 		  /// prefixed with \c '+' and \c '-', then these can be read into an
 		  /// arc map.  Similarly, an attribute can be read into an arc, if
 		  /// it's value is an edge label prefixed with \c '+' or \c '-'.
 		  template <typename _Graph>
 		  class GraphReader {
 		  public:
 		    typedef _Graph Graph;
 		    TEMPLATE_GRAPH_TYPEDEFS(Graph);
 		  private:
 		    std::istream* _is;
 		    bool local_is;
 		    std::string _filename;
 		    Graph& _graph;
 		    std::string _nodes_caption;
 		    std::string _edges_caption;
 		    std::string _attributes_caption;
 		    typedef std::map<std::string, Node> NodeIndex;
 		    NodeIndex _node_index;
 		    typedef std::map<std::string, Edge> EdgeIndex;
 		    EdgeIndex _edge_index;
 		    typedef std::vector<std::pair<std::string,
 		      _reader_bits::MapStorageBase<Node>*> > NodeMaps;
 		    NodeMaps _node_maps;
 		    typedef std::vector<std::pair<std::string,
 		      _reader_bits::MapStorageBase<Edge>*> > EdgeMaps;
 		    EdgeMaps _edge_maps;
 		    typedef std::multimap<std::string, _reader_bits::ValueStorageBase*>
 		      Attributes;
 		    Attributes _attributes;
 		    bool _use_nodes;
 		    bool _use_edges;
 		    bool _skip_nodes;
 		    bool _skip_edges;
 		    int line_num;
 		    std::istringstream line;
 		  public:
 		    /// \brief Constructor
 		    ///
 		    /// Construct an undirected graph reader, which reads from the given
 		    /// input stream.
 		    GraphReader(Graph& 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) {}
 		    /// \brief Constructor
 		    ///
 		    /// Construct an undirected graph reader, which reads from the given
 		    /// file.
 		    GraphReader(Graph& graph, const std::string& fn)
-		      : _is(new std::ifstream(fn.c_str())), local_is(true), _graph(graph),
 		      : _is(new std::ifstream(fn.c_str())), local_is(true),
 		        _filename(fn), _graph(graph),
 		        _use_nodes(false), _use_edges(false),
-		        _skip_nodes(false), _skip_edges(false) {}
 		        _skip_nodes(false), _skip_edges(false) {
 		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Constructor
 		    ///
 		    /// Construct an undirected graph reader, which reads from the given
 		    /// file.
 		    GraphReader(Graph& graph, const char* fn)
-		      : _is(new std::ifstream(fn)), local_is(true), _graph(graph),
 		      : _is(new std::ifstream(fn)), local_is(true),
 		        _filename(fn), _graph(graph),
 		        _use_nodes(false), _use_edges(false),
-		        _skip_nodes(false), _skip_edges(false) {}
 		        _skip_nodes(false), _skip_edges(false) {
 		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Destructor
 		    ~GraphReader() {
 		      for (typename NodeMaps::iterator it = _node_maps.begin();
 		           it != _node_maps.end(); ++it) {
 		        delete it->second;
+		      }
 		      for (typename EdgeMaps::iterator it = _edge_maps.begin();
 		           it != _edge_maps.end(); ++it) {
 		        delete it->second;
+		      }
 		      for (typename Attributes::iterator it = _attributes.begin();
 		           it != _attributes.end(); ++it) {
 		        delete it->second;
+		      }
 		      if (local_is) {
 		        delete _is;
+		      }
+		    }
 		  private:
 		    friend GraphReader<Graph> graphReader<>(Graph& graph, std::istream& is);
 		    friend GraphReader<Graph> graphReader<>(Graph& graph,
 		                                            const std::string& fn);
 		    friend GraphReader<Graph> graphReader<>(Graph& graph, const char *fn);
 		    GraphReader(GraphReader& other)
 		      : _is(other._is), local_is(other.local_is), _graph(other._graph),
 		        _use_nodes(other._use_nodes), _use_edges(other._use_edges),
 		        _skip_nodes(other._skip_nodes), _skip_edges(other._skip_edges) {
 		      other._is = 0;
 		      other.local_is = false;
 		      _node_index.swap(other._node_index);
 		      _edge_index.swap(other._edge_index);
 		      _node_maps.swap(other._node_maps);
 		      _edge_maps.swap(other._edge_maps);
 		      _attributes.swap(other._attributes);
 		      _nodes_caption = other._nodes_caption;
 		      _edges_caption = other._edges_caption;
 		      _attributes_caption = other._attributes_caption;
+		    }
 		    GraphReader& operator=(const GraphReader&);
 		  public:
 		    /// \name Reading rules
 		    /// @{
 		    /// \brief Node map reading rule
 		    ///
 		    /// Add a node map reading rule to the reader.
 		    template <typename Map>
 		    GraphReader& nodeMap(const std::string& caption, Map& map) {
 		      checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>();
 		      _reader_bits::MapStorageBase<Node>* storage =
 		        new _reader_bits::MapStorage<Node, Map>(map);
 		      _node_maps.push_back(std::make_pair(caption, storage));
 		      return *this;
+		    }
 		    /// \brief Node map reading rule
 		    ///
 		    /// Add a node map reading rule with specialized converter to the
 		    /// reader.
 		    template <typename Map, typename Converter>
 		    GraphReader& nodeMap(const std::string& caption, Map& map,
 		                           const Converter& converter = Converter()) {
 		      checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>();
 		      _reader_bits::MapStorageBase<Node>* storage =
 		        new _reader_bits::MapStorage<Node, Map, Converter>(map, converter);
 		      _node_maps.push_back(std::make_pair(caption, storage));
 		      return *this;
+		    }
 		    /// \brief Edge map reading rule
 		    ///
 		    /// Add an edge map reading rule to the reader.
 		    template <typename Map>
 		    GraphReader& edgeMap(const std::string& caption, Map& map) {
 		      checkConcept<concepts::WriteMap<Edge, typename Map::Value>, Map>();
 		      _reader_bits::MapStorageBase<Edge>* storage =
 		        new _reader_bits::MapStorage<Edge, Map>(map);
 		      _edge_maps.push_back(std::make_pair(caption, storage));
 		      return *this;
+		    }
@@ -1583,886 +1597,899 @@
 		    ///
 		    /// Use previously constructed edge set, and specify the edge
 		    /// label map.
 		    template <typename Map>
 		    GraphReader& useEdges(const Map& map) {
 		      checkConcept<concepts::ReadMap<Edge, typename Map::Value>, Map>();
 		      LEMON_ASSERT(!_use_edges, "Multiple usage of useEdges() member");
 		      _use_edges = true;
 		      _writer_bits::DefaultConverter<typename Map::Value> converter;
 		      for (EdgeIt a(_graph); a != INVALID; ++a) {
 		        _edge_index.insert(std::make_pair(converter(map[a]), a));
+		      }
 		      return *this;
+		    }
 		    /// \brief Use previously constructed edge set
 		    ///
 		    /// Use previously constructed edge set, and specify the edge
 		    /// label map and a functor which converts the label map values to
 		    /// \c std::string.
 		    template <typename Map, typename Converter>
 		    GraphReader& useEdges(const Map& map,
 		                            const Converter& converter = Converter()) {
 		      checkConcept<concepts::ReadMap<Edge, typename Map::Value>, Map>();
 		      LEMON_ASSERT(!_use_edges, "Multiple usage of useEdges() member");
 		      _use_edges = true;
 		      for (EdgeIt a(_graph); a != INVALID; ++a) {
 		        _edge_index.insert(std::make_pair(converter(map[a]), a));
+		      }
 		      return *this;
+		    }
 		    /// \brief Skip the reading of node section
 		    ///
 		    /// Omit the reading of the node section. This implies that each node
 		    /// map reading rule will be abandoned, and the nodes of the graph
 		    /// will not be constructed, which usually cause that the edge set
 		    /// could not be read due to lack of node name
 		    /// could not be read due to lack of node name resolving.
 		    /// Therefore \c skipEdges() function should also be used, or
 		    /// \c useNodes() should be used to specify the label of the nodes.
 		    GraphReader& skipNodes() {
 		      LEMON_ASSERT(!_skip_nodes, "Skip nodes already set");
 		      _skip_nodes = true;
 		      return *this;
+		    }
 		    /// \brief Skip the reading of edge section
 		    ///
 		    /// Omit the reading of the edge section. This implies that each edge
 		    /// map reading rule will be abandoned, and the edges of the graph
 		    /// will not be constructed.
 		    GraphReader& skipEdges() {
 		      LEMON_ASSERT(!_skip_edges, "Skip edges already set");
 		      _skip_edges = true;
 		      return *this;
+		    }
 		    /// @}
 		  private:
 		    bool readLine() {
 		      std::string str;
 		      while(++line_num, std::getline(*_is, str)) {
 		        line.clear(); line.str(str);
 		        char c;
 		        if (line >> std::ws >> c && c != '#') {
 		          line.putback(c);
 		          return true;
+		        }
+		      }
 		      return false;
+		    }
 		    bool readSuccess() {
 		      return static_cast<bool>(*_is);
+		    }
 		    void skipSection() {
 		      char c;
 		      while (readSuccess() && line >> c && c != '@') {
 		        readLine();
+		      }
 		      line.putback(c);
+		    }
 		    void readNodes() {
 		      std::vector<int> map_index(_node_maps.size());
 		      int map_num, label_index;
 		      char c;
 		      if (!readLine() || !(line >> c) || c == '@') {
 		        if (readSuccess() && line) line.putback(c);
 		        if (!_node_maps.empty())
-		          throw DataFormatError("Cannot find map names");
+		          throw FormatError("Cannot find map names");
 		        return;
+		      }
 		      line.putback(c);
+		      {
 		        std::map<std::string, int> maps;
 		        std::string map;
 		        int index = 0;
 		        while (_reader_bits::readToken(line, map)) {
 		          if (maps.find(map) != maps.end()) {
 		            std::ostringstream msg;
 		            msg << "Multiple occurence of node map: " << map;
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
 		          maps.insert(std::make_pair(map, index));
 		          ++index;
+		        }
 		        for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) {
 		          std::map<std::string, int>::iterator jt =
 		            maps.find(_node_maps[i].first);
 		          if (jt == maps.end()) {
 		            std::ostringstream msg;
 		            msg << "Map not found in file: " << _node_maps[i].first;
 		            throw DataFormatError(msg.str().c_str());
 		            msg << "Map not found: " << _node_maps[i].first;
 		            throw FormatError(msg.str());
+		          }
 		          map_index[i] = jt->second;
+		        }
+		        {
 		          std::map<std::string, int>::iterator jt = maps.find("label");
 		          if (jt != maps.end()) {
 		            label_index = jt->second;
 		          } else {
 		            label_index = -1;
+		          }
+		        }
 		        map_num = maps.size();
+		      }
 		      while (readLine() && line >> c && c != '@') {
 		        line.putback(c);
 		        std::vector<std::string> tokens(map_num);
 		        for (int i = 0; i < map_num; ++i) {
 		          if (!_reader_bits::readToken(line, tokens[i])) {
 		            std::ostringstream msg;
 		            msg << "Column not found (" << i + 1 << ")";
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
+		        }
 		        if (line >> std::ws >> c)
-		          throw DataFormatError("Extra character on the end of line");
+		          throw FormatError("Extra character at the end of line");
 		        Node n;
 		        if (!_use_nodes) {
 		          n = _graph.addNode();
 		          if (label_index != -1)
 		            _node_index.insert(std::make_pair(tokens[label_index], n));
 		        } else {
 		          if (label_index == -1)
-		            throw DataFormatError("Label map not found in file");
+		            throw FormatError("Label map not found");
 		          typename std::map<std::string, Node>::iterator it =
 		            _node_index.find(tokens[label_index]);
 		          if (it == _node_index.end()) {
 		            std::ostringstream msg;
 		            msg << "Node with label not found: " << tokens[label_index];
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
 		          n = it->second;
+		        }
 		        for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) {
 		          _node_maps[i].second->set(n, tokens[map_index[i]]);
+		        }
+		      }
 		      if (readSuccess()) {
 		        line.putback(c);
+		      }
+		    }
 		    void readEdges() {
 		      std::vector<int> map_index(_edge_maps.size());
 		      int map_num, label_index;
 		      char c;
 		      if (!readLine() || !(line >> c) || c == '@') {
 		        if (readSuccess() && line) line.putback(c);
 		        if (!_edge_maps.empty())
-		          throw DataFormatError("Cannot find map names");
+		          throw FormatError("Cannot find map names");
 		        return;
+		      }
 		      line.putback(c);
+		      {
 		        std::map<std::string, int> maps;
 		        std::string map;
 		        int index = 0;
 		        while (_reader_bits::readToken(line, map)) {
 		          if (maps.find(map) != maps.end()) {
 		            std::ostringstream msg;
 		            msg << "Multiple occurence of edge map: " << map;
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
 		          maps.insert(std::make_pair(map, index));
 		          ++index;
+		        }
 		        for (int i = 0; i < static_cast<int>(_edge_maps.size()); ++i) {
 		          std::map<std::string, int>::iterator jt =
 		            maps.find(_edge_maps[i].first);
 		          if (jt == maps.end()) {
 		            std::ostringstream msg;
 		            msg << "Map not found in file: " << _edge_maps[i].first;
 		            throw DataFormatError(msg.str().c_str());
 		            msg << "Map not found: " << _edge_maps[i].first;
 		            throw FormatError(msg.str());
+		          }
 		          map_index[i] = jt->second;
+		        }
+		        {
 		          std::map<std::string, int>::iterator jt = maps.find("label");
 		          if (jt != maps.end()) {
 		            label_index = jt->second;
 		          } else {
 		            label_index = -1;
+		          }
+		        }
 		        map_num = maps.size();
+		      }
 		      while (readLine() && line >> c && c != '@') {
 		        line.putback(c);
 		        std::string source_token;
 		        std::string target_token;
 		        if (!_reader_bits::readToken(line, source_token))
-		          throw DataFormatError("Node u not found");
+		          throw FormatError("Node u not found");
 		        if (!_reader_bits::readToken(line, target_token))
-		          throw DataFormatError("Node v not found");
+		          throw FormatError("Node v not found");
 		        std::vector<std::string> tokens(map_num);
 		        for (int i = 0; i < map_num; ++i) {
 		          if (!_reader_bits::readToken(line, tokens[i])) {
 		            std::ostringstream msg;
 		            msg << "Column not found (" << i + 1 << ")";
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
+		        }
 		        if (line >> std::ws >> c)
-		          throw DataFormatError("Extra character on the end of line");
+		          throw FormatError("Extra character at the end of line");
 		        Edge e;
 		        if (!_use_edges) {
 		          typename NodeIndex::iterator it;
 		          it = _node_index.find(source_token);
 		          if (it == _node_index.end()) {
 		            std::ostringstream msg;
 		            msg << "Item not found: " << source_token;
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
 		          Node source = it->second;
 		          it = _node_index.find(target_token);
 		          if (it == _node_index.end()) {
 		            std::ostringstream msg;
 		            msg << "Item not found: " << target_token;
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
 		          Node target = it->second;
 		          e = _graph.addEdge(source, target);
 		          if (label_index != -1)
 		            _edge_index.insert(std::make_pair(tokens[label_index], e));
 		        } else {
 		          if (label_index == -1)
-		            throw DataFormatError("Label map not found in file");
+		            throw FormatError("Label map not found");
 		          typename std::map<std::string, Edge>::iterator it =
 		            _edge_index.find(tokens[label_index]);
 		          if (it == _edge_index.end()) {
 		            std::ostringstream msg;
 		            msg << "Edge with label not found: " << tokens[label_index];
-		            throw DataFormatError(msg.str().c_str());
+		            throw FormatError(msg.str());
+		          }
 		          e = it->second;
+		        }
 		        for (int i = 0; i < static_cast<int>(_edge_maps.size()); ++i) {
 		          _edge_maps[i].second->set(e, tokens[map_index[i]]);
+		        }
+		      }
 		      if (readSuccess()) {
 		        line.putback(c);
+		      }
+		    }
 		    void readAttributes() {
 		      std::set<std::string> read_attr;
 		      char c;
 		      while (readLine() && line >> c && c != '@') {
 		        line.putback(c);
 		        std::string attr, token;
 		        if (!_reader_bits::readToken(line, attr))
-		          throw DataFormatError("Attribute name not found");
+		          throw FormatError("Attribute name not found");
 		        if (!_reader_bits::readToken(line, token))
-		          throw DataFormatError("Attribute value not found");
+		          throw FormatError("Attribute value not found");
 		        if (line >> c)
-		          throw DataFormatError("Extra character on the end of line");
+		          throw FormatError("Extra character at the end of line");
+		        {
 		          std::set<std::string>::iterator it = read_attr.find(attr);
 		          if (it != read_attr.end()) {
 		            std::ostringstream msg;
 		            msg << "Multiple occurence of attribute " << attr;
 		            throw DataFormatError(msg.str().c_str());
 		            msg << "Multiple occurence of attribute: " << attr;
 		            throw FormatError(msg.str());
+		          }
 		          read_attr.insert(attr);
+		        }
+		        {
 		          typename Attributes::iterator it = _attributes.lower_bound(attr);
 		          while (it != _attributes.end() && it->first == attr) {
 		            it->second->set(token);
 		            ++it;
+		          }
+		        }
+		      }
 		      if (readSuccess()) {
 		        line.putback(c);
+		      }
 		      for (typename Attributes::iterator it = _attributes.begin();
 		           it != _attributes.end(); ++it) {
 		        if (read_attr.find(it->first) == read_attr.end()) {
 		          std::ostringstream msg;
 		          msg << "Attribute not found in file: " << it->first;
 		          throw DataFormatError(msg.str().c_str());
 		          msg << "Attribute not found: " << it->first;
 		          throw FormatError(msg.str());
+		        }
+		      }
+		    }
 		  public:
 		    /// \name Execution of the reader
 		    /// @{
 		    /// \brief Start the batch processing
 		    ///
 		    /// This function starts the batch processing
 		    void run() {
 		      LEMON_ASSERT(_is != 0, "This reader assigned to an other reader");
 		      bool nodes_done = _skip_nodes;
 		      bool edges_done = _skip_edges;
 		      bool attributes_done = false;
 		      line_num = 0;
 		      readLine();
 		      skipSection();
 		      while (readSuccess()) {
 		        try {
 		          char c;
 		          std::string section, caption;
 		          line >> c;
 		          _reader_bits::readToken(line, section);
 		          _reader_bits::readToken(line, caption);
 		          if (line >> c)
-		            throw DataFormatError("Extra character on the end of line");
+		            throw FormatError("Extra character at the end of line");
 		          if (section == "nodes" && !nodes_done) {
 		            if (_nodes_caption.empty() || _nodes_caption == caption) {
 		              readNodes();
 		              nodes_done = true;
+		            }
 		          } else if ((section == "edges" || section == "arcs") &&
 		                     !edges_done) {
 		            if (_edges_caption.empty() || _edges_caption == caption) {
 		              readEdges();
 		              edges_done = true;
+		            }
 		          } else if (section == "attributes" && !attributes_done) {
 		            if (_attributes_caption.empty() || _attributes_caption == caption) {
 		              readAttributes();
 		              attributes_done = true;
+		            }
 		          } else {
 		            readLine();
 		            skipSection();
+		          }
-		        } catch (DataFormatError& error) {
+		        } catch (FormatError& error) {
 		          error.line(line_num);
 		          error.file(_filename);
 		          throw;
+		        }
+		      }
 		      if (!nodes_done) {
-		        throw DataFormatError("Section @nodes not found");
+		        throw FormatError("Section @nodes not found");
+		      }
 		      if (!edges_done) {
-		        throw DataFormatError("Section @edges not found");
+		        throw FormatError("Section @edges not found");
+		      }
 		      if (!attributes_done && !_attributes.empty()) {
-		        throw DataFormatError("Section @attributes not found");
+		        throw FormatError("Section @attributes not found");
+		      }
+		    }
 		    /// @}
 		  };
 		  /// \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 = std::cin) {
 		    GraphReader<Graph> 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, 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);
 		    return tmp;
+		  }
 		  class SectionReader;
 		  SectionReader sectionReader(std::istream& is);
 		  SectionReader sectionReader(const std::string& fn);
 		  SectionReader sectionReader(const char* fn);
 		  /// \ingroup lemon_io
 		  ///
 		  /// \brief Section reader class
 		  ///
 		  /// In the \ref lgf-format "LGF" file extra sections can be placed,
 		  /// which contain any data in arbitrary format. Such sections can be
 		  /// read with this class. A reading rule can be added to the class
 		  /// with two different functions. With the \c sectionLines() function a
 		  /// functor can process the section line-by-line, while with the \c
 		  /// sectionStream() member the section can be read from an input
 		  /// stream.
 		  class SectionReader {
 		  private:
 		    std::istream* _is;
 		    bool local_is;
 		    std::string _filename;
 		    typedef std::map<std::string, _reader_bits::Section*> Sections;
 		    Sections _sections;
 		    int line_num;
 		    std::istringstream line;
 		  public:
 		    /// \brief Constructor
 		    ///
 		    /// Construct a section reader, which reads from the given input
 		    /// stream.
 		    SectionReader(std::istream& is)
 		      : _is(&is), local_is(false) {}
 		    /// \brief Constructor
 		    ///
 		    /// Construct a section reader, which reads from the given file.
 		    SectionReader(const std::string& fn)
-		      : _is(new std::ifstream(fn.c_str())), local_is(true) {}
+		      : _is(new std::ifstream(fn.c_str())), local_is(true),
 		        _filename(fn) {
 		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Constructor
 		    ///
 		    /// Construct a section reader, which reads from the given file.
 		    SectionReader(const char* fn)
-		      : _is(new std::ifstream(fn)), local_is(true) {}
+		      : _is(new std::ifstream(fn)), local_is(true),
 		        _filename(fn) {
 		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Destructor
 		    ~SectionReader() {
 		      for (Sections::iterator it = _sections.begin();
 		           it != _sections.end(); ++it) {
 		        delete it->second;
+		      }
 		      if (local_is) {
 		        delete _is;
+		      }
+		    }
 		  private:
 		    friend SectionReader sectionReader(std::istream& is);
 		    friend SectionReader sectionReader(const std::string& fn);
 		    friend SectionReader sectionReader(const char* fn);
 		    SectionReader(SectionReader& other)
 		      : _is(other._is), local_is(other.local_is) {
 		      other._is = 0;
 		      other.local_is = false;
 		      _sections.swap(other._sections);
+		    }
 		    SectionReader& operator=(const SectionReader&);
 		  public:
 		    /// \name Section readers
 		    /// @{
 		    /// \brief Add a section processor with line oriented reading
 		    ///
 		    /// The first parameter is the type descriptor of the section, the
 		    /// second is a functor, which takes just one \c std::string
 		    /// parameter. At the reading process, each line of the section
 		    /// will be given to the functor object. However, the empty lines
 		    /// and the comment lines are filtered out, and the leading
 		    /// whitespaces are trimmed from each processed string.
 		    ///
 		    /// For example let's see a section, which contain several
 		    /// integers, which should be inserted into a vector.
 		    ///\code
 		    ///  @numbers
 		    ///  12 45 23
 		    ///  4
 		    ///  23 6
 		    ///\endcode
 		    ///
 		    /// The functor is implemented as a struct:
 		    ///\code
 		    ///  struct NumberSection {
 		    ///    std::vector<int>& _data;
 		    ///    NumberSection(std::vector<int>& data) : _data(data) {}
 		    ///    void operator()(const std::string& line) {
 		    ///      std::istringstream ls(line);
 		    ///      int value;
 		    ///      while (ls >> value) _data.push_back(value);
 		    ///    }
 		    ///  };
 		    ///
 		    ///  // ...
 		    ///
 		    ///  reader.sectionLines("numbers", NumberSection(vec));
 		    ///\endcode
 		    template <typename Functor>
 		    SectionReader& sectionLines(const std::string& type, Functor functor) {
 		      LEMON_ASSERT(!type.empty(), "Type is empty.");
 		      LEMON_ASSERT(_sections.find(type) == _sections.end(),
 		                   "Multiple reading of section.");
 		      _sections.insert(std::make_pair(type,
 		        new _reader_bits::LineSection<Functor>(functor)));
 		      return *this;
+		    }
 		    /// \brief Add a section processor with stream oriented reading
 		    ///
 		    /// The first parameter is the type of the section, the second is
 		    /// a functor, which takes an \c std::istream& and an \c int&
 		    /// parameter, the latter regard to the line number of stream. The
 		    /// functor can read the input while the section go on, and the
 		    /// line number should be modified accordingly.
 		    template <typename Functor>
 		    SectionReader& sectionStream(const std::string& type, Functor functor) {
 		      LEMON_ASSERT(!type.empty(), "Type is empty.");
 		      LEMON_ASSERT(_sections.find(type) == _sections.end(),
 		                   "Multiple reading of section.");
 		      _sections.insert(std::make_pair(type,
 		         new _reader_bits::StreamSection<Functor>(functor)));
 		      return *this;
+		    }
 		    /// @}
 		  private:
 		    bool readLine() {
 		      std::string str;
 		      while(++line_num, std::getline(*_is, str)) {
 		        line.clear(); line.str(str);
 		        char c;
 		        if (line >> std::ws >> c && c != '#') {
 		          line.putback(c);
 		          return true;
+		        }
+		      }
 		      return false;
+		    }
 		    bool readSuccess() {
 		      return static_cast<bool>(*_is);
+		    }
 		    void skipSection() {
 		      char c;
 		      while (readSuccess() && line >> c && c != '@') {
 		        readLine();
+		      }
 		      line.putback(c);
+		    }
 		  public:
 		    /// \name Execution of the reader
 		    /// @{
 		    /// \brief Start the batch processing
 		    ///
 		    /// This function starts the batch processing.
 		    void run() {
 		      LEMON_ASSERT(_is != 0, "This reader assigned to an other reader");
 		      std::set<std::string> extra_sections;
 		      line_num = 0;
 		      readLine();
 		      skipSection();
 		      while (readSuccess()) {
 		        try {
 		          char c;
 		          std::string section, caption;
 		          line >> c;
 		          _reader_bits::readToken(line, section);
 		          _reader_bits::readToken(line, caption);
 		          if (line >> c)
-		            throw DataFormatError("Extra character on the end of line");
+		            throw FormatError("Extra character at the end of line");
 		          if (extra_sections.find(section) != extra_sections.end()) {
 		            std::ostringstream msg;
 		            msg << "Multiple occurence of section " << section;
 		            throw DataFormatError(msg.str().c_str());
 		            msg << "Multiple occurence of section: " << section;
 		            throw FormatError(msg.str());
+		          }
 		          Sections::iterator it = _sections.find(section);
 		          if (it != _sections.end()) {
 		            extra_sections.insert(section);
 		            it->second->process(*_is, line_num);
+		          }
 		          readLine();
 		          skipSection();
-		        } catch (DataFormatError& error) {
+		        } catch (FormatError& error) {
 		          error.line(line_num);
 		          error.file(_filename);
 		          throw;
+		        }
+		      }
 		      for (Sections::iterator it = _sections.begin();
 		           it != _sections.end(); ++it) {
 		        if (extra_sections.find(it->first) == extra_sections.end()) {
 		          std::ostringstream os;
 		          os << "Cannot find section: " << it->first;
-		          throw DataFormatError(os.str().c_str());
+		          throw FormatError(os.str());
+		        }
+		      }
+		    }
 		    /// @}
 		  };
 		  /// \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);
 		    return tmp;
+		  }
 		  /// \brief Return a \ref SectionReader class
 		  ///
 		  /// 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
 		  inline SectionReader sectionReader(const char* fn) {
 		    SectionReader tmp(fn);
 		    return tmp;
+		  }
 		  /// \ingroup lemon_io
 		  ///
 		  /// \brief Reader for the contents of the \ref lgf-format "LGF" file
 		  ///
 		  /// This class can be used to read the sections, the map names and
 		  /// the attributes from a file. Usually, the LEMON programs know
 		  /// that, which type of graph, which maps and which attributes
 		  /// should be read from a file, but in general tools (like glemon)
 		  /// the contents of an LGF file should be guessed somehow. This class
 		  /// reads the graph and stores the appropriate information for
 		  /// reading the graph.
 		  ///
 		  ///\code
 		  /// LgfContents contents("graph.lgf");
 		  /// contents.run();
 		  ///
 		  /// // Does it contain any node section and arc section?
 		  /// if (contents.nodeSectionNum() == 0 || contents.arcSectionNum()) {
 		  ///   std::cerr << "Failure, cannot find graph." << std::endl;
 		  ///   return -1;
 		  /// }
 		  /// std::cout << "The name of the default node section: "
 		  ///           << contents.nodeSection(0) << std::endl;
 		  /// std::cout << "The number of the arc maps: "
 		  ///           << contents.arcMaps(0).size() << std::endl;
 		  /// std::cout << "The name of second arc map: "
 		  ///           << contents.arcMaps(0)[1] << std::endl;
 		  ///\endcode
 		  class LgfContents {
 		  private:
 		    std::istream* _is;
 		    bool local_is;
 		    std::vector<std::string> _node_sections;
 		    std::vector<std::string> _edge_sections;
 		    std::vector<std::string> _attribute_sections;
 		    std::vector<std::string> _extra_sections;
 		    std::vector<bool> _arc_sections;
 		    std::vector<std::vector<std::string> > _node_maps;
 		    std::vector<std::vector<std::string> > _edge_maps;
 		    std::vector<std::vector<std::string> > _attributes;
 		    int line_num;
 		    std::istringstream line;
 		  public:
 		    /// \brief Constructor
 		    ///
 		    /// Construct an \e LGF contents reader, which reads from the given
 		    /// input stream.
 		    LgfContents(std::istream& is)
 		      : _is(&is), local_is(false) {}
 		    /// \brief Constructor
 		    ///
 		    /// Construct an \e LGF contents reader, which reads from the given
 		    /// file.
 		    LgfContents(const std::string& fn)
-		      : _is(new std::ifstream(fn.c_str())), local_is(true) {}
 		      : _is(new std::ifstream(fn.c_str())), local_is(true) {
 		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Constructor
 		    ///
 		    /// Construct an \e LGF contents reader, which reads from the given
 		    /// file.
 		    LgfContents(const char* fn)
-		      : _is(new std::ifstream(fn)), local_is(true) {}
 		      : _is(new std::ifstream(fn)), local_is(true) {
 		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Destructor
 		    ~LgfContents() {
 		      if (local_is) delete _is;
+		    }
 		  private:
 		    LgfContents(const LgfContents&);
 		    LgfContents& operator=(const LgfContents&);
 		  public:
 		    /// \name Node sections
 		    /// @{
 		    /// \brief Gives back the number of node sections in the file.
 		    ///
 		    /// Gives back the number of node sections in the file.
 		    int nodeSectionNum() const {
 		      return _node_sections.size();
+		    }
 		    /// \brief Returns the node section name at the given position.
 		    ///
 		    /// Returns the node section name at the given position.
 		    const std::string& nodeSection(int i) const {
 		      return _node_sections[i];
+		    }
 		    /// \brief Gives back the node maps for the given section.
 		    ///
 		    /// Gives back the node maps for the given section.
 		    const std::vector<std::string>& nodeMapNames(int i) const {
 		      return _node_maps[i];
+		    }
 		    /// @}
 		    /// \name Arc/Edge sections
 		    /// @{
 		    /// \brief Gives back the number of arc/edge sections in the file.
 		    ///
 		    /// Gives back the number of arc/edge sections in the file.
 		    /// \note It is synonym of \c edgeSectionNum().
 		    int arcSectionNum() const {
 		      return _edge_sections.size();
+		    }
 		    /// \brief Returns the arc/edge section name at the given position.
 		    ///
 		    /// Returns the arc/edge section name at the given position.
 		    /// \note It is synonym of \c edgeSection().
 		    const std::string& arcSection(int i) const {
 		      return _edge_sections[i];
+		    }
 		    /// \brief Gives back the arc/edge maps for the given section.
 		    ///
 		    /// Gives back the arc/edge maps for the given section.
 		    /// \note It is synonym of \c edgeMapNames().
 		    const std::vector<std::string>& arcMapNames(int i) const {
 		      return _edge_maps[i];
+		    }
 		    /// @}
 		    /// \name Synonyms
 		    /// @{
 		    /// \brief Gives back the number of arc/edge sections in the file.
 		    ///
 		    /// Gives back the number of arc/edge sections in the file.
 		    /// \note It is synonym of \c arcSectionNum().
 		    int edgeSectionNum() const {
 		      return _edge_sections.size();
+		    }
 		    /// \brief Returns the section name at the given position.
 		    ///
 		    /// Returns the section name at the given position.
 		    /// \note It is synonym of \c arcSection().
 		    const std::string& edgeSection(int i) const {
 		      return _edge_sections[i];
+		    }
 		    /// \brief Gives back the edge maps for the given section.
 		    ///
 		    /// Gives back the edge maps for the given section.
 		    /// \note It is synonym of \c arcMapNames().
 		    const std::vector<std::string>& edgeMapNames(int i) const {
 		      return _edge_maps[i];
+		    }

lemon/lgf_writer.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		///\ingroup lemon_io
 		///\file
 		///\brief \ref lgf-format "LEMON Graph Format" writer.
 		#ifndef LEMON_LGF_WRITER_H
 		#define LEMON_LGF_WRITER_H
 		#include <iostream>
 		#include <fstream>
 		#include <sstream>
 		#include <algorithm>
 		#include <vector>
 		#include <functional>
 		#include <lemon/assert.h>
 		#include <lemon/core.h>
 		#include <lemon/maps.h>
 		#include <lemon/concept_check.h>
 		#include <lemon/concepts/maps.h>
 		namespace lemon {
 		  namespace _writer_bits {
 		    template <typename Value>
 		    struct DefaultConverter {
 		      std::string operator()(const Value& value) {
 		        std::ostringstream os;
 		        os << value;
 		        return os.str();
+		      }
 		    };
 		    template <typename T>
 		    bool operator<(const T&, const T&) {
-		      throw DataFormatError("Label map is not comparable");
+		      throw FormatError("Label map is not comparable");
+		    }
 		    template <typename _Map>
 		    class MapLess {
 		    public:
 		      typedef _Map Map;
 		      typedef typename Map::Key Item;
 		    private:
 		      const Map& _map;
 		    public:
 		      MapLess(const Map& map) : _map(map) {}
 		      bool operator()(const Item& left, const Item& right) {
 		        return _map[left] < _map[right];
+		      }
 		    };
 		    template <typename _Graph, bool _dir, typename _Map>
 		    class GraphArcMapLess {
 		    public:
 		      typedef _Map Map;
 		      typedef _Graph Graph;
 		      typedef typename Graph::Edge Item;
 		    private:
 		      const Graph& _graph;
 		      const Map& _map;
 		    public:
 		      GraphArcMapLess(const Graph& graph, const Map& map)
 		        : _graph(graph), _map(map) {}
 		      bool operator()(const Item& left, const Item& right) {
 		        return _map[_graph.direct(left, _dir)] <
 		          _map[_graph.direct(right, _dir)];
+		      }
 		    };
 		    template <typename _Item>
 		    class MapStorageBase {
 		    public:
 		      typedef _Item Item;
 		    public:
 		      MapStorageBase() {}
 		      virtual ~MapStorageBase() {}
 		      virtual std::string get(const Item& item) = 0;
 		      virtual void sort(std::vector<Item>&) = 0;
 		    };
 		    template <typename _Item, typename _Map,
 		              typename _Converter = DefaultConverter<typename _Map::Value> >
 		    class MapStorage : public MapStorageBase<_Item> {
 		    public:
 		      typedef _Map Map;
 		      typedef _Converter Converter;
 		      typedef _Item Item;
 		    private:
 		      const Map& _map;
 		      Converter _converter;
 		    public:
 		      MapStorage(const Map& map, const Converter& converter = Converter())
 		        : _map(map), _converter(converter) {}
 		      virtual ~MapStorage() {}
 		      virtual std::string get(const Item& item) {
 		        return _converter(_map[item]);
+		      }
 		      virtual void sort(std::vector<Item>& items) {
 		        MapLess<Map> less(_map);
 		        std::sort(items.begin(), items.end(), less);
+		      }
 		    };
 		    template <typename _Graph, bool _dir, typename _Map,
 		              typename _Converter = DefaultConverter<typename _Map::Value> >
 		    class GraphArcMapStorage : public MapStorageBase<typename _Graph::Edge> {
 		    public:
 		      typedef _Map Map;
 		      typedef _Converter Converter;
 		      typedef _Graph Graph;
 		      typedef typename Graph::Edge Item;
 		      static const bool dir = _dir;
 		    private:
 		      const Graph& _graph;
 		      const Map& _map;
 		      Converter _converter;
 		    public:
 		      GraphArcMapStorage(const Graph& graph, const Map& map,
 		                         const Converter& converter = Converter())
 		        : _graph(graph), _map(map), _converter(converter) {}
 		      virtual ~GraphArcMapStorage() {}
 		      virtual std::string get(const Item& item) {
 		        return _converter(_map[_graph.direct(item, dir)]);
+		      }
 		      virtual void sort(std::vector<Item>& items) {
 		        GraphArcMapLess<Graph, dir, Map> less(_graph, _map);
 		        std::sort(items.begin(), items.end(), less);
+		      }
 		    };
 		    class ValueStorageBase {
 		    public:
 		      ValueStorageBase() {}
 		      virtual ~ValueStorageBase() {}
 		      virtual std::string get() = 0;
 		    };
 		    template <typename _Value, typename _Converter = DefaultConverter<_Value> >
 		    class ValueStorage : public ValueStorageBase {
 		    public:
 		      typedef _Value Value;
 		      typedef _Converter Converter;
 		    private:
 		      const Value& _value;
 		      Converter _converter;
 		    public:
 		      ValueStorage(const Value& value, const Converter& converter = Converter())
 		        : _value(value), _converter(converter) {}
 		      virtual std::string get() {
 		        return _converter(_value);
+		      }
 		    };
 		    template <typename Value>
 		    struct MapLookUpConverter {
 		      const std::map<Value, std::string>& _map;
 		      MapLookUpConverter(const std::map<Value, std::string>& map)
 		        : _map(map) {}
 		      std::string operator()(const Value& str) {
 		        typename std::map<Value, std::string>::const_iterator it =
 		          _map.find(str);
 		        if (it == _map.end()) {
-		          throw DataFormatError("Item not found");
+		          throw FormatError("Item not found");
+		        }
 		        return it->second;
+		      }
 		    };
 		    template <typename Graph>
 		    struct GraphArcLookUpConverter {
 		      const Graph& _graph;
 		      const std::map<typename Graph::Edge, std::string>& _map;
 		      GraphArcLookUpConverter(const Graph& graph,
 		                              const std::map<typename Graph::Edge,
 		                                             std::string>& map)
 		        : _graph(graph), _map(map) {}
 		      std::string operator()(const typename Graph::Arc& val) {
 		        typename std::map<typename Graph::Edge, std::string>
 		          ::const_iterator it = _map.find(val);
 		        if (it == _map.end()) {
-		          throw DataFormatError("Item not found");
+		          throw FormatError("Item not found");
+		        }
 		        return (_graph.direction(val) ? '+' : '-') + it->second;
+		      }
 		    };
 		    inline bool isWhiteSpace(char c) {
 		      return c == ' ' || c == '\t' || c == '\v' ||
 		        c == '\n' || c == '\r' || c == '\f';
+		    }
 		    inline bool isEscaped(char c) {
 		      return c == '\\' || c == '\"' || c == '\'' ||
 		        c == '\a' || c == '\b';
+		    }
 		    inline static void writeEscape(std::ostream& os, char c) {
 		      switch (c) {
 		      case '\\':
 		        os << "\\\\";
 		        return;
 		      case '\"':
 		        os << "\\\"";
 		        return;
 		      case '\a':
 		        os << "\\a";
 		        return;
 		      case '\b':
 		        os << "\\b";
 		        return;
 		      case '\f':
 		        os << "\\f";
 		        return;
 		      case '\r':
 		        os << "\\r";
 		        return;
 		      case '\n':
 		        os << "\\n";
 		        return;
 		      case '\t':
 		        os << "\\t";
 		        return;
 		      case '\v':
 		        os << "\\v";
 		        return;
 		      default:
 		        if (c < 0x20) {
 		          std::ios::fmtflags flags = os.flags();
 		          os << '\\' << std::oct << static_cast<int>(c);
 		          os.flags(flags);
 		        } else {
 		          os << c;
+		        }
 		        return;
+		      }
+		    }
 		    inline bool requireEscape(const std::string& str) {
 		      if (str.empty() || str[0] == '@') return true;
 		      std::istringstream is(str);
 		      char c;
 		      while (is.get(c)) {
 		        if (isWhiteSpace(c) || isEscaped(c)) {
 		          return true;
+		        }
+		      }
 		      return false;
+		    }
 		    inline std::ostream& writeToken(std::ostream& os, const std::string& str) {
 		      if (requireEscape(str)) {
 		        os << '\"';
 		        for (std::string::const_iterator it = str.begin();
 		             it != str.end(); ++it) {
 		          writeEscape(os, *it);
+		        }
 		        os << '\"';
 		      } else {
 		        os << str;
+		      }
 		      return os;
+		    }
 		    class Section {
 		    public:
 		      virtual ~Section() {}
 		      virtual void process(std::ostream& os) = 0;
 		    };
 		    template <typename Functor>
 		    class LineSection : public Section {
 		    private:
 		      Functor _functor;
 		    public:
@@ -369,201 +369,205 @@
 		  ///
 		  /// This utility writes an \ref lgf-format "LGF" file.
 		  ///
 		  /// The writing method does a batch processing. The user creates a
 		  /// writer object, then various writing rules can be added to the
 		  /// writer, and eventually the writing is executed with the \c run()
 		  /// member function. A map writing rule can be added to the writer
 		  /// with the \c nodeMap() or \c arcMap() members. An optional
 		  /// converter parameter can also be added as a standard functor
 		  /// converting from the value type of the map to \c std::string. If it
 		  /// is set, it will determine how the value type of the map is written to
 		  /// the output stream. If the functor is not set, then a default
 		  /// conversion will be used. The \c attribute(), \c node() and \c
 		  /// arc() functions are used to add attribute writing rules.
 		  ///
 		  ///\code
 		  /// DigraphWriter<Digraph>(digraph, std::cout).
 		  ///   nodeMap("coordinates", coord_map).
 		  ///   nodeMap("size", size).
 		  ///   nodeMap("title", title).
 		  ///   arcMap("capacity", cap_map).
 		  ///   node("source", src).
 		  ///   node("target", trg).
 		  ///   attribute("caption", caption).
 		  ///   run();
 		  ///\endcode
 		  ///
 		  ///
 		  /// By default, the writer does not write additional captions to the
 		  /// sections, but they can be give as an optional parameter of
 		  /// the \c nodes(), \c arcs() or \c
 		  /// attributes() functions.
 		  ///
 		  /// The \c skipNodes() and \c skipArcs() functions forbid the
 		  /// writing of the sections. If two arc sections should be written
 		  /// to the output, it can be done in two passes, the first pass
 		  /// writes the node section and the first arc section, then the
 		  /// second pass skips the node section and writes just the arc
 		  /// 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 _Digraph>
 		  class DigraphWriter {
 		  public:
 		    typedef _Digraph Digraph;
 		    TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);
 		  private:
 		    std::ostream* _os;
 		    bool local_os;
 		    const Digraph& _digraph;
 		    std::string _nodes_caption;
 		    std::string _arcs_caption;
 		    std::string _attributes_caption;
 		    typedef std::map<Node, std::string> NodeIndex;
 		    NodeIndex _node_index;
 		    typedef std::map<Arc, std::string> ArcIndex;
 		    ArcIndex _arc_index;
 		    typedef std::vector<std::pair<std::string,
 		      _writer_bits::MapStorageBase<Node>* > > NodeMaps;
 		    NodeMaps _node_maps;
 		    typedef std::vector<std::pair<std::string,
 		      _writer_bits::MapStorageBase<Arc>* > >ArcMaps;
 		    ArcMaps _arc_maps;
 		    typedef std::vector<std::pair<std::string,
 		      _writer_bits::ValueStorageBase*> > Attributes;
 		    Attributes _attributes;
 		    bool _skip_nodes;
 		    bool _skip_arcs;
 		  public:
 		    /// \brief Constructor
 		    ///
 		    /// Construct a directed graph writer, which writes to the given
 		    /// output stream.
 		    DigraphWriter(const Digraph& digraph, std::ostream& os = std::cout)
 		      : _os(&os), local_os(false), _digraph(digraph),
 		        _skip_nodes(false), _skip_arcs(false) {}
 		    /// \brief Constructor
 		    ///
 		    /// Construct a directed graph writer, which writes to the given
 		    /// output file.
 		    DigraphWriter(const Digraph& digraph, const std::string& fn)
 		      : _os(new std::ofstream(fn.c_str())), local_os(true), _digraph(digraph),
-		        _skip_nodes(false), _skip_arcs(false) {}
 		        _skip_nodes(false), _skip_arcs(false) {
 		      if (!(*_os)) throw IoError("Cannot write file", fn);
+		    }
 		    /// \brief Constructor
 		    ///
 		    /// Construct a directed graph writer, which writes to the given
 		    /// output file.
 		    DigraphWriter(const Digraph& digraph, const char* fn)
 		      : _os(new std::ofstream(fn)), local_os(true), _digraph(digraph),
-		        _skip_nodes(false), _skip_arcs(false) {}
 		        _skip_nodes(false), _skip_arcs(false) {
 		      if (!(*_os)) throw IoError("Cannot write file", fn);
+		    }
 		    /// \brief Destructor
 		    ~DigraphWriter() {
 		      for (typename NodeMaps::iterator it = _node_maps.begin();
 		           it != _node_maps.end(); ++it) {
 		        delete it->second;
+		      }
 		      for (typename ArcMaps::iterator it = _arc_maps.begin();
 		           it != _arc_maps.end(); ++it) {
 		        delete it->second;
+		      }
 		      for (typename Attributes::iterator it = _attributes.begin();
 		           it != _attributes.end(); ++it) {
 		        delete it->second;
+		      }
 		      if (local_os) {
 		        delete _os;
+		      }
+		    }
 		  private:
 		    friend DigraphWriter<Digraph> digraphWriter<>(const Digraph& digraph,
 		                                                  std::ostream& os);
 		    friend DigraphWriter<Digraph> digraphWriter<>(const Digraph& digraph,
 		                                                  const std::string& fn);
 		    friend DigraphWriter<Digraph> digraphWriter<>(const Digraph& digraph,
 		                                                  const char *fn);
 		    DigraphWriter(DigraphWriter& other)
 		      : _os(other._os), local_os(other.local_os), _digraph(other._digraph),
 		        _skip_nodes(other._skip_nodes), _skip_arcs(other._skip_arcs) {
 		      other._os = 0;
 		      other.local_os = false;
 		      _node_index.swap(other._node_index);
 		      _arc_index.swap(other._arc_index);
 		      _node_maps.swap(other._node_maps);
 		      _arc_maps.swap(other._arc_maps);
 		      _attributes.swap(other._attributes);
 		      _nodes_caption = other._nodes_caption;
 		      _arcs_caption = other._arcs_caption;
 		      _attributes_caption = other._attributes_caption;
+		    }
 		    DigraphWriter& operator=(const DigraphWriter&);
 		  public:
 		    /// \name Writing rules
 		    /// @{
 		    /// \brief Node map writing rule
 		    ///
 		    /// Add a node map writing rule to the writer.
 		    template <typename Map>
 		    DigraphWriter& nodeMap(const std::string& caption, const Map& map) {
 		      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
 		      _writer_bits::MapStorageBase<Node>* storage =
 		        new _writer_bits::MapStorage<Node, Map>(map);
 		      _node_maps.push_back(std::make_pair(caption, storage));
 		      return *this;
+		    }
 		    /// \brief Node map writing rule
 		    ///
 		    /// Add a node map writing rule with specialized converter to the
 		    /// writer.
 		    template <typename Map, typename Converter>
 		    DigraphWriter& nodeMap(const std::string& caption, const Map& map,
 		                           const Converter& converter = Converter()) {
 		      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
 		      _writer_bits::MapStorageBase<Node>* storage =
 		        new _writer_bits::MapStorage<Node, Map, Converter>(map, converter);
 		      _node_maps.push_back(std::make_pair(caption, storage));
 		      return *this;
+		    }
 		    /// \brief Arc map writing rule
 		    ///
 		    /// Add an arc map writing rule to the writer.
 		    template <typename Map>
 		    DigraphWriter& arcMap(const std::string& caption, const Map& map) {
 		      checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>();
 		      _writer_bits::MapStorageBase<Arc>* storage =
 		        new _writer_bits::MapStorage<Arc, Map>(map);
 		      _arc_maps.push_back(std::make_pair(caption, storage));
 		      return *this;
+		    }
@@ -926,201 +930,205 @@
+		  }
 		  /// \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>
 		  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);
 		  /// \ingroup lemon_io
 		  ///
 		  /// \brief \ref lgf-format "LGF" writer for directed graphs
 		  ///
 		  /// This utility writes an \ref lgf-format "LGF" file.
 		  ///
 		  /// It can be used almost the same way as \c DigraphWriter.
 		  /// The only difference is that this class can handle edges and
 		  /// edge maps as well as arcs and arc maps.
 		  ///
 		  /// The arc maps are written into the file as two columns, the
 		  /// caption of the columns are the name of the map prefixed with \c
 		  /// '+' and \c '-'. The arcs are written into the \c \@attributes
 		  /// section as a \c '+' or a \c '-' prefix (depends on the direction
 		  /// of the arc) and the label of corresponding edge.
 		  template <typename _Graph>
 		  class GraphWriter {
 		  public:
 		    typedef _Graph Graph;
 		    TEMPLATE_GRAPH_TYPEDEFS(Graph);
 		  private:
 		    std::ostream* _os;
 		    bool local_os;
 		    const Graph& _graph;
 		    std::string _nodes_caption;
 		    std::string _edges_caption;
 		    std::string _attributes_caption;
 		    typedef std::map<Node, std::string> NodeIndex;
 		    NodeIndex _node_index;
 		    typedef std::map<Edge, std::string> EdgeIndex;
 		    EdgeIndex _edge_index;
 		    typedef std::vector<std::pair<std::string,
 		      _writer_bits::MapStorageBase<Node>* > > NodeMaps;
 		    NodeMaps _node_maps;
 		    typedef std::vector<std::pair<std::string,
 		      _writer_bits::MapStorageBase<Edge>* > >EdgeMaps;
 		    EdgeMaps _edge_maps;
 		    typedef std::vector<std::pair<std::string,
 		      _writer_bits::ValueStorageBase*> > Attributes;
 		    Attributes _attributes;
 		    bool _skip_nodes;
 		    bool _skip_edges;
 		  public:
 		    /// \brief Constructor
 		    ///
 		    /// Construct a directed graph writer, which writes to the given
 		    /// output stream.
 		    GraphWriter(const Graph& graph, std::ostream& os = std::cout)
 		      : _os(&os), local_os(false), _graph(graph),
 		        _skip_nodes(false), _skip_edges(false) {}
 		    /// \brief Constructor
 		    ///
 		    /// Construct a directed graph writer, which writes to the given
 		    /// output file.
 		    GraphWriter(const Graph& graph, const std::string& fn)
 		      : _os(new std::ofstream(fn.c_str())), local_os(true), _graph(graph),
-		        _skip_nodes(false), _skip_edges(false) {}
 		        _skip_nodes(false), _skip_edges(false) {
 		      if (!(*_os)) throw IoError("Cannot write file", fn);
+		    }
 		    /// \brief Constructor
 		    ///
 		    /// Construct a directed graph writer, which writes to the given
 		    /// output file.
 		    GraphWriter(const Graph& graph, const char* fn)
 		      : _os(new std::ofstream(fn)), local_os(true), _graph(graph),
-		        _skip_nodes(false), _skip_edges(false) {}
 		        _skip_nodes(false), _skip_edges(false) {
 		      if (!(*_os)) throw IoError("Cannot write file", fn);
+		    }
 		    /// \brief Destructor
 		    ~GraphWriter() {
 		      for (typename NodeMaps::iterator it = _node_maps.begin();
 		           it != _node_maps.end(); ++it) {
 		        delete it->second;
+		      }
 		      for (typename EdgeMaps::iterator it = _edge_maps.begin();
 		           it != _edge_maps.end(); ++it) {
 		        delete it->second;
+		      }
 		      for (typename Attributes::iterator it = _attributes.begin();
 		           it != _attributes.end(); ++it) {
 		        delete it->second;
+		      }
 		      if (local_os) {
 		        delete _os;
+		      }
+		    }
 		  private:
 		    friend GraphWriter<Graph> graphWriter<>(const Graph& graph,
 		                                            std::ostream& os);
 		    friend GraphWriter<Graph> graphWriter<>(const Graph& graph,
 		                                            const std::string& fn);
 		    friend GraphWriter<Graph> graphWriter<>(const Graph& graph,
 		                                            const char *fn);
 		    GraphWriter(GraphWriter& other)
 		      : _os(other._os), local_os(other.local_os), _graph(other._graph),
 		        _skip_nodes(other._skip_nodes), _skip_edges(other._skip_edges) {
 		      other._os = 0;
 		      other.local_os = false;
 		      _node_index.swap(other._node_index);
 		      _edge_index.swap(other._edge_index);
 		      _node_maps.swap(other._node_maps);
 		      _edge_maps.swap(other._edge_maps);
 		      _attributes.swap(other._attributes);
 		      _nodes_caption = other._nodes_caption;
 		      _edges_caption = other._edges_caption;
 		      _attributes_caption = other._attributes_caption;
+		    }
 		    GraphWriter& operator=(const GraphWriter&);
 		  public:
 		    /// \name Writing rules
 		    /// @{
 		    /// \brief Node map writing rule
 		    ///
 		    /// Add a node map writing rule to the writer.
 		    template <typename Map>
 		    GraphWriter& nodeMap(const std::string& caption, const Map& map) {
 		      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
 		      _writer_bits::MapStorageBase<Node>* storage =
 		        new _writer_bits::MapStorage<Node, Map>(map);
 		      _node_maps.push_back(std::make_pair(caption, storage));
 		      return *this;
+		    }
 		    /// \brief Node map writing rule
 		    ///
 		    /// Add a node map writing rule with specialized converter to the
 		    /// writer.
 		    template <typename Map, typename Converter>
 		    GraphWriter& nodeMap(const std::string& caption, const Map& map,
 		                           const Converter& converter = Converter()) {
 		      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
 		      _writer_bits::MapStorageBase<Node>* storage =
 		        new _writer_bits::MapStorage<Node, Map, Converter>(map, converter);
 		      _node_maps.push_back(std::make_pair(caption, storage));
 		      return *this;
+		    }
 		    /// \brief Edge map writing rule
 		    ///
 		    /// Add an edge map writing rule to the writer.
 		    template <typename Map>
 		    GraphWriter& edgeMap(const std::string& caption, const Map& map) {
 		      checkConcept<concepts::ReadMap<Edge, typename Map::Value>, Map>();
 		      _writer_bits::MapStorageBase<Edge>* storage =
 		        new _writer_bits::MapStorage<Edge, Map>(map);
 		      _edge_maps.push_back(std::make_pair(caption, storage));
 		      return *this;
+		    }
@@ -1485,199 +1493,203 @@
 		    void run() {
 		      if (!_skip_nodes) {
 		        writeNodes();
 		      } else {
 		        createNodeIndex();
+		      }
 		      if (!_skip_edges) {
 		        writeEdges();
 		      } else {
 		        createEdgeIndex();
+		      }
 		      writeAttributes();
+		    }
 		    /// \brief Give back the stream of the writer
 		    ///
 		    /// Give back the stream of the writer
 		    std::ostream& ostream() {
 		      return *_os;
+		    }
 		    /// @}
 		  };
 		  /// \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 = std::cout) {
 		    GraphWriter<Graph> 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, 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);
 		    return tmp;
+		  }
 		  class SectionWriter;
 		  SectionWriter sectionWriter(std::istream& is);
 		  SectionWriter sectionWriter(const std::string& fn);
 		  SectionWriter sectionWriter(const char* fn);
 		  /// \ingroup lemon_io
 		  ///
 		  /// \brief Section writer class
 		  ///
 		  /// In the \ref lgf-format "LGF" file extra sections can be placed,
 		  /// which contain any data in arbitrary format. Such sections can be
 		  /// written with this class. A writing rule can be added to the
 		  /// class with two different functions. With the \c sectionLines()
 		  /// function a generator can write the section line-by-line, while
 		  /// with the \c sectionStream() member the section can be written to
 		  /// an output stream.
 		  class SectionWriter {
 		  private:
 		    std::ostream* _os;
 		    bool local_os;
 		    typedef std::vector<std::pair<std::string, _writer_bits::Section*> >
 		    Sections;
 		    Sections _sections;
 		  public:
 		    /// \brief Constructor
 		    ///
 		    /// Construct a section writer, which writes to the given output
 		    /// stream.
 		    SectionWriter(std::ostream& os)
 		      : _os(&os), local_os(false) {}
 		    /// \brief Constructor
 		    ///
 		    /// Construct a section writer, which writes into the given file.
 		    SectionWriter(const std::string& fn)
-		      : _os(new std::ofstream(fn.c_str())), local_os(true) {}
 		      : _os(new std::ofstream(fn.c_str())), local_os(true) {
 		      if (!(*_os)) throw IoError("Cannot write file", fn);
+		    }
 		    /// \brief Constructor
 		    ///
 		    /// Construct a section writer, which writes into the given file.
 		    SectionWriter(const char* fn)
-		      : _os(new std::ofstream(fn)), local_os(true) {}
 		      : _os(new std::ofstream(fn)), local_os(true) {
 		      if (!(*_os)) throw IoError("Cannot write file", fn);
+		    }
 		    /// \brief Destructor
 		    ~SectionWriter() {
 		      for (Sections::iterator it = _sections.begin();
 		           it != _sections.end(); ++it) {
 		        delete it->second;
+		      }
 		      if (local_os) {
 		        delete _os;
+		      }
+		    }
 		  private:
 		    friend SectionWriter sectionWriter(std::ostream& os);
 		    friend SectionWriter sectionWriter(const std::string& fn);
 		    friend SectionWriter sectionWriter(const char* fn);
 		    SectionWriter(SectionWriter& other)
 		      : _os(other._os), local_os(other.local_os) {
 		      other._os = 0;
 		      other.local_os = false;
 		      _sections.swap(other._sections);
+		    }
 		    SectionWriter& operator=(const SectionWriter&);
 		  public:
 		    /// \name Section writers
 		    /// @{
 		    /// \brief Add a section writer with line oriented writing
 		    ///
 		    /// The first parameter is the type descriptor of the section, the
 		    /// second is a generator with std::string values. At the writing
 		    /// process, the returned \c std::string will be written into the
 		    /// output file until it is an empty string.
 		    ///
 		    /// For example, an integer vector is written into a section.
 		    ///\code
 		    ///  @numbers
 		    ///  12 45 23 78
 		    ///  4 28 38 28
 		    ///  23 6 16
 		    ///\endcode
 		    ///
 		    /// The generator is implemented as a struct.
 		    ///\code
 		    ///  struct NumberSection {
 		    ///    std::vector<int>::const_iterator _it, _end;
 		    ///    NumberSection(const std::vector<int>& data)
 		    ///      : _it(data.begin()), _end(data.end()) {}
 		    ///    std::string operator()() {
 		    ///      int rem_in_line = 4;
 		    ///      std::ostringstream ls;
 		    ///      while (rem_in_line > 0 && _it != _end) {
 		    ///        ls << *(_it++) << ' ';
 		    ///        --rem_in_line;
 		    ///      }
 		    ///      return ls.str();
 		    ///    }
 		    ///  };
 		    ///
 		    ///  // ...
 		    ///
 		    ///  writer.sectionLines("numbers", NumberSection(vec));
 		    ///\endcode
 		    template <typename Functor>
 		    SectionWriter& sectionLines(const std::string& type, Functor functor) {
 		      LEMON_ASSERT(!type.empty(), "Type is empty.");
 		      _sections.push_back(std::make_pair(type,
 		        new _writer_bits::LineSection<Functor>(functor)));
 		      return *this;
+		    }
 		    /// \brief Add a section writer with stream oriented writing
 		    ///
 		    /// The first parameter is the type of the section, the second is
 		    /// a functor, which takes a \c std::ostream& parameter. The
 		    /// functor writes the section to the output stream.
 		    /// \warning The last line must be closed with end-line character.
 		    template <typename Functor>
 		    SectionWriter& sectionStream(const std::string& type, Functor functor) {
 		      LEMON_ASSERT(!type.empty(), "Type is empty.");
 		      _sections.push_back(std::make_pair(type,
 		         new _writer_bits::StreamSection<Functor>(functor)));
 		      return *this;
+		    }
 		    /// @}

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