Method UTF16Input

java/com/google/re2j/MachineInput.java:179–183

(CharSequence str, int start, int end)

    final int end;

    public UTF16Input(CharSequence str, int start, int end) {
      this.str = str;
      this.start = start;
      this.end = end;
    }

    @Override
    int step(int pos) {