Delete an element from queue by name

SystemVerilog
,
1

Hi,

i want to delete an element from queue. the delete method requires an index to delete the element.
i know the value which i want to delete. How can it be done ?

string queue_2[$];

initial begin
queue_2 = {“Red”,“Blue”,“Green”};

//i want to delete the BLUE element and i tried the below code but it end up with compilation error

//Delete Method

queue_2.delete(queue_2.find_first_index with (item == “BLUE”));
end

Below is error reported:
Arg. ‘index’ of ‘delete’: Cannot assign an unpacked type ‘int []’ to a packed type ‘int’

2

In reply to sv_uvm_learner_1:

All of the find_* methods return a queue type. This is so it can return an empty queue if there is no match. So you will need to do

string queue_2[$];
int blue_index[$];

initial begin
   queue_2 = {"Red","Blue","Green"};
   blue_index = queue_2.find_first_index with (item == "BLUE");
   foreach(blue_index[del]) queue_2.delete(del);
end
3

In reply to dave_59:

Thanks Dave.

4

In reply to dave_59:

Hi Dave,

As always, thanks for the answer.

Not to nitpick, but I think you meant::

  foreach(blue_index[del]) queue_2.delete(blue_index[del]);

Hi sv_uvm_learner_1, just note that, if you are deleting more than 1 of the same element, this method would get trickier and there are other posts on how to do it.

5

Hi here is the code for locating multiple elements and deleting them.


module mod;
string st_que[$];
int a_que[$];
int count;

initial begin
st_que={"Red","Green","Green","Blue","Green"};
a_que=st_que.find_index with (item=="Green");

foreach(a_que[i])
begin
st_que.delete(a_que[i]-count);
count++;
end

$display("Locations:%p",a_que);
$display("String Queue:%p",st_que);
end
endmodule