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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_bmap6plcf5ouis39jk629aonmh, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
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<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
sclass StringHead is Closeable {
  settable bool readMode;
  settable bool writeMode;
  gettable Reader reader;
  gettable Writer writer;

  *() {}
  *(Reader reader) { reader(reader); }
  *(Writer writer) { writer(writer); }
  
  selfType reader(Reader reader) {
    this.reader = new BufferedReader(reader);
    readMode(true);
    this;
  }
  
  selfType writer(Writer writer) { this.writer = writer; writeMode(true); this; }
  
  void finish {}
  
  S readLine() {
    S line = readLineFromReader(reader);
    if (line == null) close();
    ret line;
  }
  
  void writeLine(S line) {
    writer.write(line);
    writer.write('\n');
  }
  
  void exchangeLine(IF0<S> getter, IVF1<S> setter) {
    if (writeMode())
      writeLine(getter!);
    
    if (readMode())
      setter.get(readLine());
  }
  
  close {
    dispose reader;
    dispose writer;
  }
}