always@(posedge clk or negedge rst_n) begin if(~rst_n) valid_out <= 0; else valid_out <= (cnt==5 || cnt==10 || cnt==15)&&valid_in; end 为啥【您提交的代码无法完成编译 main.v:26: syntax error main.v:28: Syntax in assignment statement l-value. main.v:29: syntax error main.v:30: Syntax in assignment statement l-value. 】我不理解