LEMON/LEMON-main Changeset - r291:d901321d6555

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Changeset - r291:d901321d6555

« 290:f68999

292:e7af73 »

r291:d901321d6555

Wed, 01 Oct 2008 11:58:03

[Not Reviewed]

0 comments (0 inline)

kpeter (Peter Kovacs)
kpeter@inf.elte.hu

Changing parameter order in exception classes + improvements

0 4 0

default

4 files changed with 82 insertions and 85 deletions:

lemon/error.h

lemon/graph_to_eps.h

lemon/lgf_reader.h

lemon/lgf_writer.h

↑ Collapse diff ↑

lemon/error.h

Show inline comments

@@ -40,13 +40,13 @@
 		  /// Base class for exceptions used in LEMON.
 		  ///
 		  class Exception : public std::exception {
 		  public:
 		    ///\e Constructor
 		    Exception() {}
-		    ///\e Virtual destructor
+		    ///Constructor
 		    Exception() throw() {}
 		    ///Virtual destructor
 		    virtual ~Exception() throw() {}
-		    ///\e A short description of the exception
 		    ///A short description of the exception
 		    virtual const char* what() const throw() {
 		      return "lemon::Exception";
+		    }
 		  };
@@ -63,86 +63,85 @@
 		    mutable std::string _what;
 		  public:
 		    /// Copy constructor
 		    IoError(const IoError &error) {
+		    IoError(const IoError &error) throw() : Exception() {
 		      message(error._message);
 		      file(error._file);
+		    }
 		    /// Constructor
 		    explicit IoError(const char *message) {
+		    explicit IoError(const char *message) throw() {
 		      IoError::message(message);
+		    }
 		    /// Constructor
 		    explicit IoError(const std::string &message) {
+		    explicit IoError(const std::string &message) throw() {
 		      IoError::message(message);
+		    }
 		    /// Constructor
-		    IoError(const std::string &file, const char *message) {
+		    explicit IoError(const char *message,
 		                     const std::string &file) throw() {
 		      IoError::message(message);
 		      IoError::file(file);
+		    }
 		    /// Constructor
-		    IoError(const std::string &file, const std::string &message) {
+		    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) {
+		    void message(const char *message) throw() {
 		      try {
 		        _message = message;
 		      } catch (...) {}
+		    }
 		    /// Set the error message
 		    void message(const std::string& message) {
+		    void message(const std::string& message) throw() {
 		      try {
 		        _message = message;
 		      } catch (...) {}
+		    }
 		    /// Set the file name
 		    void file(const std::string &file) {
+		    void file(const std::string &file) throw() {
 		      try {
 		        _file = file;
 		      } catch (...) {}
+		    }
 		    /// Returns the error message
 		    const std::string& message() const {
+		    const std::string& message() const throw() {
 		      return _message;
+		    }
 		    /// \brief Returns the filename
 		    ///
 		    /// Returns the filename or empty string if the filename was not
 		    /// specified.
-		    const std::string& file() const {
+		    /// 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.
 		    /// Returns a short error message which contains the message and the
 		    /// file name.
 		    virtual const char* what() const throw() {
 		      try {
 		        _what.clear();
 		        std::ostringstream oss;
 		        oss << "lemon:IoError" << ": ";
 		        oss << message();
 		        if (!file().empty()) {
 		          oss << " (";
 		          if (!file().empty()) oss << "with file '" << file() << "'";
-		          oss << ")";
+		        oss << _message;
 		        if (!_file.empty()) {
 		          oss << " ('" << _file << "')";
+		        }
 		        _what = oss.str();
+		      }
 		      catch (...) {}
@@ -153,10 +152,10 @@
 		  };
 		  /// \brief Format error
 		  ///
 		  /// This class is used to indicate if an input file has wrong
 		  /// formatting, or a data representation is not legal.
 		  /// This exception is thrown when an input file has wrong
 		  /// format or a data representation is not legal.
 		  class FormatError : public Exception {
 		  protected:
 		    std::string _message;
 		    std::string _file;
@@ -165,35 +164,37 @@
 		    mutable std::string _what;
 		  public:
 		    /// Copy constructor
 		    FormatError(const FormatError &error) {
+		    FormatError(const FormatError &error) throw() : Exception() {
 		      message(error._message);
 		      file(error._file);
 		      line(error._line);
+		    }
 		    /// Constructor
 		    explicit FormatError(const char *message) {
+		    explicit FormatError(const char *message) throw() {
 		      FormatError::message(message);
 		      _line = 0;
+		    }
 		    /// Constructor
 		    explicit FormatError(const std::string &message) {
+		    explicit FormatError(const std::string &message) throw() {
 		      FormatError::message(message);
 		      _line = 0;
+		    }
 		    /// Constructor
-		    FormatError(const std::string &file, int line, const char *message) {
+		    explicit FormatError(const char *message,
 		                         const std::string &file, int line = 0) throw() {
 		      FormatError::message(message);
 		      FormatError::file(file);
 		      FormatError::line(line);
+		    }
 		    /// Constructor
-		    FormatError(const std::string &file, int line, const std::string &message) {
+		    explicit FormatError(const std::string &message,
 		                         const std::string &file, int line = 0) throw() {
 		      FormatError::message(message);
 		      FormatError::file(file);
 		      FormatError::line(line);
+		    }
@@ -201,46 +202,45 @@
 		    /// Virtual destructor
 		    virtual ~FormatError() throw() {}
 		    /// Set the line number
 		    void line(int line) { _line = line; }
+		    void line(int line) throw() { _line = line; }
 		    /// Set the error message
 		    void message(const char *message) {
+		    void message(const char *message) throw() {
 		      try {
 		        _message = message;
 		      } catch (...) {}
+		    }
 		    /// Set the error message
 		    void message(const std::string& message) {
+		    void message(const std::string& message) throw() {
 		      try {
 		        _message = message;
 		      } catch (...) {}
+		    }
 		    /// Set the file name
 		    void file(const std::string &file) {
+		    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 { return _line; }
+		    int line() const throw() { return _line; }
 		    /// Returns the error message
 		    const std::string& message() const {
+		    const std::string& message() const throw() {
 		      return _message;
+		    }
 		    /// \brief Returns the filename
 		    ///
 		    /// Returns the filename or empty string if the filename was not
 		    /// specified.
-		    const std::string& file() const {
+		    /// 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
@@ -251,14 +251,14 @@
 		      try {
 		        _what.clear();
 		        std::ostringstream oss;
 		        oss << "lemon:FormatError" << ": ";
 		        oss << message();
 		        if (!file().empty() || line() != 0) {
 		        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();
+		          if (!_file.empty()) oss << "in file '" << _file << "'";
 		          if (!_file.empty() && _line != 0) oss << " ";
 		          if (_line != 0) oss << "at line " << _line;
 		          oss << ")";
+		        }
 		        _what = oss.str();
+		      }

lemon/graph_to_eps.h

Show inline comments

@@ -1169,9 +1169,9 @@
{
  std::ostream* os = new std::ofstream(file_name);
  if (!(*os)) {
    delete os;
    throw IoError(file_name, "Cannot write file");
    throw IoError("Cannot write file", file_name);
  }
  return GraphToEps<DefaultGraphToEpsTraits<G> >
    (DefaultGraphToEpsTraits<G>(g,*os,true));
}
@@ -1190,9 +1190,9 @@
{
  std::ostream* os = new std::ofstream(file_name.c_str());
  if (!(*os)) {
    delete os;
    throw IoError(file_name, "Cannot write file");
    throw IoError("Cannot write file", file_name);
  }
  return GraphToEps<DefaultGraphToEpsTraits<G> >
    (DefaultGraphToEpsTraits<G>(g,*os,true));
}

lemon/lgf_reader.h

Show inline comments

@@ -515,9 +515,9 @@
 		      : _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) {
-		      if (!(*_is)) throw IoError(fn, "Cannot open file");
+		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Constructor
 		    ///
@@ -527,9 +527,9 @@
 		      : _is(new std::ifstream(fn)), local_is(true),
 		        _filename(fn), _digraph(digraph),
 		        _use_nodes(false), _use_arcs(false),
 		        _skip_nodes(false), _skip_arcs(false) {
-		      if (!(*_is)) throw IoError(fn, "Cannot open file");
+		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Destructor
 		    ~DigraphReader() {
@@ -878,9 +878,9 @@
 		          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;
 		            msg << "Map not found: " << _node_maps[i].first;
 		            throw FormatError(msg.str());
+		          }
 		          map_index[i] = jt->second;
+		        }
@@ -907,18 +907,18 @@
 		            throw FormatError(msg.str());
+		          }
+		        }
 		        if (line >> std::ws >> c)
-		          throw FormatError("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 FormatError("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;
@@ -971,9 +971,9 @@
 		          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;
 		            msg << "Map not found: " << _arc_maps[i].first;
 		            throw FormatError(msg.str());
+		          }
 		          map_index[i] = jt->second;
+		        }
@@ -1009,9 +1009,9 @@
 		            throw FormatError(msg.str());
+		          }
+		        }
 		        if (line >> std::ws >> c)
-		          throw FormatError("Extra character on the end of line");
+		          throw FormatError("Extra character at the end of line");
 		        Arc a;
 		        if (!_use_arcs) {
@@ -1037,9 +1037,9 @@
 		          if (label_index != -1)
 		            _arc_index.insert(std::make_pair(tokens[label_index], a));
 		        } else {
 		          if (label_index == -1)
-		            throw FormatError("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;
@@ -1072,15 +1072,15 @@
 		          throw FormatError("Attribute name not found");
 		        if (!_reader_bits::readToken(line, token))
 		          throw FormatError("Attribute value not found");
 		        if (line >> c)
-		          throw FormatError("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;
+		            msg << "Multiple occurence of attribute: " << attr;
 		            throw FormatError(msg.str());
+		          }
 		          read_attr.insert(attr);
+		        }
@@ -1100,9 +1100,9 @@
 		      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;
 		          msg << "Attribute not found: " << it->first;
 		          throw FormatError(msg.str());
+		        }
+		      }
+		    }
@@ -1116,11 +1116,8 @@
 		    ///
 		    /// This function starts the batch processing
 		    void run() {
 		      LEMON_ASSERT(_is != 0, "This reader assigned to an other reader");
 		      if (!*_is) {
 		        throw FormatError("Cannot find file");
+		      }
 		      bool nodes_done = _skip_nodes;
 		      bool arcs_done = _skip_arcs;
 		      bool attributes_done = false;
@@ -1137,9 +1134,9 @@
 		          _reader_bits::readToken(line, section);
 		          _reader_bits::readToken(line, caption);
 		          if (line >> c)
-		            throw FormatError("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();
@@ -1307,9 +1304,9 @@
 		      : _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) {
-		      if (!(*_is)) throw IoError(fn, "Cannot open file");
+		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Constructor
 		    ///
@@ -1319,9 +1316,9 @@
 		      : _is(new std::ifstream(fn)), local_is(true),
 		        _filename(fn), _graph(graph),
 		        _use_nodes(false), _use_edges(false),
 		        _skip_nodes(false), _skip_edges(false) {
-		      if (!(*_is)) throw IoError(fn, "Cannot open file");
+		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Destructor
 		    ~GraphReader() {
@@ -1714,9 +1711,9 @@
 		          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;
 		            msg << "Map not found: " << _node_maps[i].first;
 		            throw FormatError(msg.str());
+		          }
 		          map_index[i] = jt->second;
+		        }
@@ -1743,18 +1740,18 @@
 		            throw FormatError(msg.str());
+		          }
+		        }
 		        if (line >> std::ws >> c)
-		          throw FormatError("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 FormatError("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;
@@ -1807,9 +1804,9 @@
 		          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;
 		            msg << "Map not found: " << _edge_maps[i].first;
 		            throw FormatError(msg.str());
+		          }
 		          map_index[i] = jt->second;
+		        }
@@ -1845,9 +1842,9 @@
 		            throw FormatError(msg.str());
+		          }
+		        }
 		        if (line >> std::ws >> c)
-		          throw FormatError("Extra character on the end of line");
+		          throw FormatError("Extra character at the end of line");
 		        Edge e;
 		        if (!_use_edges) {
@@ -1873,9 +1870,9 @@
 		          if (label_index != -1)
 		            _edge_index.insert(std::make_pair(tokens[label_index], e));
 		        } else {
 		          if (label_index == -1)
-		            throw FormatError("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;
@@ -1908,15 +1905,15 @@
 		          throw FormatError("Attribute name not found");
 		        if (!_reader_bits::readToken(line, token))
 		          throw FormatError("Attribute value not found");
 		        if (line >> c)
-		          throw FormatError("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;
+		            msg << "Multiple occurence of attribute: " << attr;
 		            throw FormatError(msg.str());
+		          }
 		          read_attr.insert(attr);
+		        }
@@ -1936,9 +1933,9 @@
 		      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;
 		          msg << "Attribute not found: " << it->first;
 		          throw FormatError(msg.str());
+		        }
+		      }
+		    }
@@ -1971,9 +1968,9 @@
 		          _reader_bits::readToken(line, section);
 		          _reader_bits::readToken(line, caption);
 		          if (line >> c)
-		            throw FormatError("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();
@@ -2094,18 +2091,18 @@
 		    /// 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),
 		        _filename(fn) {
-		      if (!(*_is)) throw IoError(fn, "Cannot open file");
+		      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),
 		        _filename(fn) {
-		      if (!(*_is)) throw IoError(fn, "Cannot open file");
+		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Destructor
 		    ~SectionReader() {
@@ -2260,13 +2257,13 @@
 		          _reader_bits::readToken(line, section);
 		          _reader_bits::readToken(line, caption);
 		          if (line >> c)
-		            throw FormatError("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;
+		            msg << "Multiple occurence of section: " << section;
 		            throw FormatError(msg.str());
+		          }
 		          Sections::iterator it = _sections.find(section);
 		          if (it != _sections.end()) {
@@ -2386,18 +2383,18 @@
 		    /// 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) {
-		      if (!(*_is)) throw IoError(fn, "Cannot open file");
+		      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) {
-		      if (!(*_is)) throw IoError(fn, "Cannot open file");
+		      if (!(*_is)) throw IoError("Cannot open file", fn);
+		    }
 		    /// \brief Destructor
 		    ~LgfContents() {

lemon/lgf_writer.h

Show inline comments

@@ -462,9 +462,9 @@
 		    /// output file.
 		    DigraphWriter(const std::string& fn, const Digraph& digraph)
 		      : _os(new std::ofstream(fn.c_str())), local_os(true), _digraph(digraph),
 		        _skip_nodes(false), _skip_arcs(false) {
-		      if (!(*_os)) throw IoError(fn, "Cannot write file");
+		      if (!(*_os)) throw IoError("Cannot write file", fn);
+		    }
 		    /// \brief Constructor
 		    ///
@@ -472,9 +472,9 @@
 		    /// output file.
 		    DigraphWriter(const char* fn, const Digraph& digraph)
 		      : _os(new std::ofstream(fn)), local_os(true), _digraph(digraph),
 		        _skip_nodes(false), _skip_arcs(false) {
-		      if (!(*_os)) throw IoError(fn, "Cannot write file");
+		      if (!(*_os)) throw IoError("Cannot write file", fn);
+		    }
 		    /// \brief Destructor
 		    ~DigraphWriter() {
@@ -1022,9 +1022,9 @@
 		    /// output file.
 		    GraphWriter(const std::string& fn, const Graph& graph)
 		      : _os(new std::ofstream(fn.c_str())), local_os(true), _graph(graph),
 		        _skip_nodes(false), _skip_edges(false) {
-		      if (!(*_os)) throw IoError(fn, "Cannot write file");
+		      if (!(*_os)) throw IoError("Cannot write file", fn);
+		    }
 		    /// \brief Constructor
 		    ///
@@ -1032,9 +1032,9 @@
 		    /// output file.
 		    GraphWriter(const char* fn, const Graph& graph)
 		      : _os(new std::ofstream(fn)), local_os(true), _graph(graph),
 		        _skip_nodes(false), _skip_edges(false) {
-		      if (!(*_os)) throw IoError(fn, "Cannot write file");
+		      if (!(*_os)) throw IoError("Cannot write file", fn);
+		    }
 		    /// \brief Destructor
 		    ~GraphWriter() {
@@ -1584,17 +1584,17 @@
 		    ///
 		    /// 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) {
-		      if (!(*_os)) throw IoError(fn, "Cannot write file");
+		      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) {
-		      if (!(*_os)) throw IoError(fn, "Cannot write file");
+		      if (!(*_os)) throw IoError("Cannot write file", fn);
+		    }
 		    /// \brief Destructor
 		    ~SectionWriter() {

0 comments (0 inline)

...	...	@@ -1169,9 +1169,9 @@
1169	1169	{
1170	1170	std::ostream* os = new std::ofstream(file_name);
1171	1171	if (!(*os)) {
1172	1172	delete os;
1173		throw IoError(~~file_name,~~ "Cannot write file");
	1173	throw IoError("Cannot write file", file_name);
1174	1174	}
1175	1175	return GraphToEps<DefaultGraphToEpsTraits<G> >
1176	1176	(DefaultGraphToEpsTraits<G>(g,*os,true));
1177	1177	}
...	...	@@ -1190,9 +1190,9 @@
1190	1190	{
1191	1191	std::ostream* os = new std::ofstream(file_name.c_str());
1192	1192	if (!(*os)) {
1193	1193	delete os;
1194		throw IoError(~~file_name,~~ "Cannot write file");
	1194	throw IoError("Cannot write file", file_name);
1195	1195	}
1196	1196	return GraphToEps<DefaultGraphToEpsTraits<G> >
1197	1197	(DefaultGraphToEpsTraits<G>(g,*os,true));
1198	1198	}

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