Warning: Non-existent associative array entry. Returning default value

SystemVerilog
,
2

In reply to ce_2015:

For an associative array, we can’t add/remove items in randomize()
I guess you want to do the following:
the first time .randomize() will return default lookup table.
but then if you randomize again, it will randomize existed element in this associative array.


class txn;
  typedef enum bit [3:0] {A,B,C,D} sometype_t;   
  rand int array[sometype_t] = '{default:0}; 

  function void post_randomize(); // first randomize will set to default vaule
    if (array.num()==0) begin
       array = '{A:1, B:2, C:3, D:4};
    end
  endfunction
  
endclass