User-defined type arrays?

[Eric Bieschke <eric(at)savagebeast(dot)com>]

Greetings.

I'm in the process of porting an existing Oracle pl/SQL implementation 
to Postgres and plpgsql. My schema, constraint, index, and type 
conversion all went surprisingly smooth. I've now begun to shift my 
existing pl/SQL implementations to plpgsql and haven't yet figured out 
how to properly create pgplsql function parameters of user-defined type 
arrays. In hunting down this issue, I realize that I do not understand 
how to correctly create user-defined type arrays in any context, not 
just within stored function signatures.

I believe this is possible, as the PostGres 7.4 documentation at 
http://www.postgresql.org/docs/7.4/static/arrays.html says "Arrays of 
any built-in type or user-defined type can be created."

Below is an example of me first creating a table containing a column 
using a built-in type array. I then create a user-defined type, and 
then receive an error when trying to create a table containing a column 
using a user-defined type array:

eric(at)cure> psql eric0
Welcome to psql 7.4.3, the PostgreSQL interactive terminal.

Type:  \copyright for distribution terms
       \h for help with SQL commands
       \? for help on internal slash commands
       \g or terminate with semicolon to execute query
       \q to quit

eric0=# create table foo ( bar varchar[] );
CREATE TABLE
eric0=# \d foo
            Table "public.foo"
 Column |        Type         | Modifiers
--------+---------------------+-----------
 bar    | character varying[] |

eric0=# create type baz as ( garply integer );
CREATE TYPE
eric0=# \d baz
Composite type "public.baz"
 Column |  Type
--------+---------
 garply | integer

eric0=# create table waldo ( qux baz[] );
ERROR:  type "baz[]" does not exist
eric0=# \q

I'm hoping someone can clue me in as to the correct syntax for what I'm 
attempting to do, or general guidance.

Thanks in advance.

-- Eric Bieschke