problem on clone

[chenyong]

Hi,

I met a problem on clone. In my code for scoreboard, I defined a variable as this:

timer_pkt_item chk_pkt;

the timer_pkt_item is defined as a class in other place. I then register it as:

`uvm_component_utils_begin(timer_scoreboard)

`uvm_field_object(chk_pkt, UVM_DEFAULT)

`uvm_component_utils_end

In my write function for export implementation, I would like to do this:

function void write_pkt(timer_pkt_item rcv_pkt);

chk_pkt = rcv_pkt.clone();

endfunction

My purpose is to save received data of rcv_pkt.

When I start to compile the code, irun reports error as:

assignment operator type check failed (expecting datatype compatible with 'class timer_pkt_item' but found 'class uvm_object' instead). so what is the problem to the code? I think I have defined the variable type as timer_pkt_item, why there is problem? please give me some help. thanks.

[arno]

clone() returns a uvm_object, which you need to cast. Your code should be :

$cast ( chk_pkt , rcv_pkt.clone())

[chenyong]

yes, you are right. thanks.