private static boolean add_expression_0(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "add_expression_0")) return false;
    boolean r;
    r = consumeTokenSmart(b, PLUS);
    if (!r) r = consumeTokenSmart(b, MINUS);
    return r;
  }
private static boolean add_expression_0(PsiBuilder b, int l)