RhodeCode

  /// \ingroup lemon_io

  ///

  ///

  /// 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)

  /// reads the graph and stores the appropriate information for

  /// reading the graph.

  ///

  ///

  /// // does it contain any node section and arc section

  ///   std::cerr << "Failure, cannot find graph" << std::endl;

  ///   return -1;

  /// }

  /// std::cout << "The name of the default node section : " 

  /// std::cout << "The number of the arc maps : " 

  /// std::cout << "The name of second arc map : " 

  ///\endcode

  private:

    std::istream* _is;

    /// \brief Constructor

    ///

    /// input stream.

      : _is(&is), local_is(false) {}

    /// \brief Constructor

    ///

    /// file.

      : _is(new std::ifstream(fn.c_str())), local_is(true) {}

    /// \brief Constructor

    ///

    /// file.

      : _is(new std::ifstream(fn)), local_is(true) {}

    /// \brief Copy constructor

    ///

    /// The copy constructor transfers all data from the other reader,

    /// therefore the copied reader will not be usable more. 

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

      other._is = 0;

    }

    /// \brief Destructor

      if (local_is) delete _is;

    }

  public:

    /// @{

    /// \brief Start the reading