private static boolean IP_literal_1(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "IP_literal_1")) return false;
    boolean r;
    r = IPv6address(b, l + 1);
    if (!r) r = IPvFuture(b, l + 1);
    return r;
  }
private static boolean IP_literal_1(PsiBuilder b, int l)