anchor.diff:  part of objective_regex;
   
   /**
  - * Regex pattern object.
  + * Regex pattern object
    */
   class RPattern {
   
  
positive.code:   }
  
    /**
     * Repeat least once. [a-z] -> [a-z]+
     */
    repeatLeastOnce() {
      _repeatingSuffix += "+";
    }
  
    /**
     * Maybe exists. [a-z] -> [a-z]?
     */
    maybe() {
      _repeatingSuffix += "?";
  
negative.code:   String _repeatingSuffix = "";
  
    /**
     * Convert the expression to class. "[a-z]" -> "[a-z]{1, 2}"
     */
    repeat({int count : 0, int minCount : 0, int maxCount : 0}) {
      if (count > 0) {
  