public static boolean host(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "host")) return false;
    boolean r;
    Marker m = enter_section_(b, l, _NONE_, HOST, "<host>");
    r = IP_literal(b, l + 1);
    if (!r) r = IPv4address(b, l + 1);
    if (!r) r = reg_name(b, l + 1);
    exit_section_(b, l, m, r, false, null);
    return r;
  }
public static boolean host(PsiBuilder b, int l)