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 all_known = ~(^bus === 1'bx);
assign has_unknown = ^bus === 1'bx;
assign bus_if_known = all_known ? bus : 8'd0;
endmodule