44. Bus Error Checker

How do you plan to solve it?

/*Write your code here*/
module error_checker_xz(
    input [7:0] bus,
    output all_known,
    output has_unknown,
    output [7:0] bus_if_known
);

assign has_unknown = ((^bus) === 1'bx);
assign all_known = ~has_unknown;
assign bus_if_known = (all_known == 1) ? bus : 1'b0;

endmodule