public static boolean IP_literal(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "IP_literal")) return false;
    if (!nextTokenIs(b, LSBRACE)) return false;
    boolean r;
    Marker m = enter_section_(b);
    r = consumeToken(b, LSBRACE);
    r = r && IP_literal_1(b, l + 1);
    r = r && consumeToken(b, RSBRACE);
    exit_section_(b, m, IP_LITERAL, r);
    return r;
  }
public static boolean IP_literal(PsiBuilder b, int l)