PostgreSQL: Obtaining multiple values from the record type

I am writing an sql program that creates a table with columns computed in a function. The function returns the record type.
This is what the header looks like:

create or replace function get_items(col1 int, col2 int) returns record

What I would like to be able to do is:

create table table_items as (
with q as (
    select *,
   (SELECT * FROM get_items(t.col1, t.col2) AS (item1 integer, item2 integer))
    from 
    table_t as t
    )
    select * from q
);

however, that results in:

ERROR:  subquery must return only one column

To fix the error I changed the code into:

create table table_items as (
with q as (
    select *,
   (SELECT item1 FROM get_items(t.col1, t.col2) AS (item1 integer, item2 integer)),
   (SELECT item2 FROM get_items(t.col1, t.col2) AS (item1 integer, item2 integer)) 
    from 
    table_t as t
    )
    select * from q
);

This solution works, though twice as slow when item2 is obtained in addition to item1.
I assume that it is because the same query is executed twice.
Is there a way to obtain both items having the function invoked only once?
Thanks a lot!

>Solution :

This is a good use case for a lateral join.

create table table_items as 
select *
from table_t as t
cross join lateral
get_items(t.col1, t.col2) as l(item1 integer, item2 integer);