Difficulty: Hard · Puzzle 6 of 6 · Topic: Parameterized Class Puzzles
Factory create fails for `pkt#(int)` in a parameterized sequence item. What registration mistake causes this?
class pkt #(type T = int) extends uvm_sequence_item;
`uvm_object_utils(pkt#(T))
function new(string name="pkt");
super.new(name);
endfunction
endclass
initial begin
uvm_object o;
o = pkt#(int)::type_id::create("o");
endParameterized classes need parameter-aware registration macros.
1) `uvm_object_utils` is for non-parameterized object types or concrete typedef specializations.
2) For parameterized class templates, use `uvm_object_param_utils(pkt#(T))`.
3) Wrong macro leads to missing/incorrect factory registration and create/override mismatches.Answer: Use `uvm_object_param_utils` for parameterized class templates; wrong macro breaks reliable factory behavior per specialization.
People remember macro names but not why specialization-aware registration is required.
When is it acceptable to use `uvm_object_utils` with a typedef of a concrete specialization?