RhodeCode

      other._is = 0;

      if (!*_is) {

	throw DataFormatError("Cannot find file");

      }

    DigraphReader<Digraph> tmp(is, digraph);

    return tmp;

    DigraphReader<Digraph> tmp(fn, digraph);

    return tmp;

    DigraphReader<Digraph> tmp(fn, digraph);

    return tmp;

	  std::ios::fmtflags flags = os.flags();

	  os.flags(flags);

  /// converter parameter can also be added as a standard functor

  /// converting from the value type of the map to std::string. If it

  /// is set, it will determine how the map's value type 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.

  /// 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.

      other._os = 0;

  DigraphWriter<Digraph> digraphWriter(std::ostream& os, Digraph& digraph) {

    DigraphWriter<Digraph> tmp(os, digraph);

    return tmp;

    DigraphWriter<Digraph> tmp(fn, digraph);

    return tmp;

    DigraphWriter<Digraph> tmp(fn, digraph);

    return tmp;