What does "const ref" mean?

UVM
1

Dear All,

I’m trying to understand the code below,


function uvm_sequence_item reg2bus(const ref uvm_reg_bus_op rw);
...
endfunction

1.What does “const ref” mean? how does it work?

2.What if we use “reg2bus” function which is declared as"(const ref uvm_reg_bus_op rw)" argument, probably that reg2bus function should be called from somewhere I guess.

From here, I want to know that what mechanism be used to argument when that function be called?
For example,

How does reg2bus function with argument call from another function?

2

In reply to UVM_LOVE:

This should have been written using input instead of const ref. See const ref | Verification Academy