Typecast fails in extended class which extends from base class

UVM
,
1

Hi,

Following is the dummy code. Actual code is very complicated as it contains lot’s of scripting and part of IP so can’t paste it here. But I am trying my best to replicate the same.

//TEST

class base_test extend uvm_test;
 protected my_base_class        base_class[1][2][3];
 `uvm_component_utils(base_test)

 task main_phase(uvm_phase phase);
  tmp_object = m_factory.create_object_by_name(seq_name);
  uvm_object  tmp_object;
  assert($cast(type[1][2][23], tmp_object));
 endtask
endclass

//BASE SEQUENCE
class my_base_class_c extends uvm_seq;
 //Some Functionality
endclass

class extended_class_c extends my_base_class_c;
 //Some Functionality
endclass

The issue which I am facing is when I run base sequence my_base_class_c, the assert in the base test is working fine in casting the type. But Whenever I use a sequence that extends from the my_type sequence the casting fails, even though the extended class is extended from the base class itself. In the base sequence and extended sequence all are virtual functions and task. I am not sure what I am missing in concept which causing the assertion failure in type casting. It would be great if anyone please tell me what should I look for?

Regards

2

In reply to kritikagoell:

Your dummy example contains many typos, and any one of them could obscure the real problem. It would help getting the dummy code to execute, like I have below:

`define CTOR(n) `uvm_object_utils(n) \
function new(string name=`"n`"); \
endfunction

module top;
import uvm_pkg::*;
`include "uvm_macros.svh"
//BASE SEQUENCE
class my_base_class_c extends uvm_sequence;
  `CTOR(my_base_class_c);
 //Some Functionality
endclass
 
class extended_class_c extends my_base_class_c;
  `CTOR(extended_class_c)
 //Some Functionality
endclass 
class base_test extends uvm_object;
  `CTOR(base_test)
 protected my_base_class_c        base_class[1][2][3]; 
 task main_phase();
   uvm_object  tmp_object;
   uvm_factory m_factory = uvm_factory::get();
   tmp_object = m_factory.create_object_by_name("extended_class_c");
   assert($cast(base_class[0][1][2], tmp_object)); 
 endtask
endclass
  
base_test t = new;
  initial t.main_phase();
endmodule