Method step

java/com/google/re2j/MachineInput.java:185–194

(int pos)

    }

    @Override
    int step(int pos) {
      pos += start;
      if (pos < end) {
        int rune = Character.codePointAt(str, pos);
        return rune << 3 | Character.charCount(rune);
      } else {
        return EOF;
      }
    }

    @Override
    boolean canCheckPrefix() {