Do you know a json_populate_record alternative method to create a ROW with a named field notation?

Hello,

In this example:

```
CREATE TYPE contact AS (
firstname VARCHAR,
lastname VARCHAR
);

postgres=# SELECT json_populate_record(NULL::contact,
postgres(# '{
postgres'# "firstname": "John",
postgres'# "lastname": "Doe"
postgres'# }'
postgres'# );
json_populate_record
----------------------
(John,Doe)
(1 row)
```

**Question:** do you know a method like json_populate_record (
https://www.postgresql.org/docs/13/functions-json.html) which allows
creating a `ROW` with named field notation without using a json format?

I know the `ROW` syntax expression:

```
postgres=# SELECT ROW('John', 'Doe')::contact;
row
------------
(John,Doe)
(1 row)
```

But I didn't find a `ROW` constructors (
https://www.postgresql.org/docs/13/sql-expressions.html#SQL-SYNTAX-ROW-CONSTRUCTORS)
syntax allowing a named field notation.

Best regards,
Stéphane
--
Stéphane Klein <contact(at)stephane-klein(dot)info>
Homepage: http://stephane-klein.info