public static int length()

in jflex/src/main/java/jflex/core/SemCheck.java [109:159]

• 42 lines of code
• 17 McCabe index (conditional complexity)

  public static int length(RegExp re) {
    RegExp2 r;

    switch (re.type) {
      case sym.BAR:
        {
          r = (RegExp2) re;
          int l1 = length(r.r1);
          if (l1 < 0) return -1;
          int l2 = length(r.r2);

          if (l1 == l2) return l1;
          else return -1;
        }

      case sym.CONCAT:
        {
          r = (RegExp2) re;
          int l1 = length(r.r1);
          if (l1 < 0) return -1;
          int l2 = length(r.r2);
          if (l2 < 0) return -1;
          return l1 + l2;
        }

      case sym.STAR:
      case sym.PLUS:
      case sym.QUESTION:
        return -1;

      case sym.CHAR:
      case sym.CHAR_I:
      case sym.PRIMCLASS:
        return 1;

      case sym.STRING:
      case sym.STRING_I:
        {
          String content = (String) ((RegExp1) re).content;
          return content.length();
        }

      case sym.TILDE:
      case sym.BANG:
        // too hard to calculate at this level, use safe approx
        return -1;

      default:
        throw new RegExpException(re);
    }
  }