Method charRange

src/main/java/org/sfj/PegLegParser.java:607–621

Generate a terminal rule for a range of characters. @param from lower bound @param to upper bound. @return rule

(char from, char to)

   * @return rule
   */
  public CharTerminal<V> charRange(char from, char to) {
    if ((int) from > (int) to) { throw error("Char range is illegal: [" + from + " to " + to + "]"); }
    return new CharTerminal<>((ignoreCase) -> {
      get().pushFrame("charRange(" + from + "," + to + ")");
      int n = get().nextChar();
      if (n >= 0) {
        for (int i = from; i <= (int) to; i++) {
          if (isCharMatch(ignoreCase, (char) n, (char) i)) {
            return get().ruleReturn(true, true);
          }
        }
      }
      return get().ruleReturn(false, false);
    });
  }

  /**
   * Generate a rule for a specific string (char sequence)