SQL & PL/SQL :: Call Function With Row Type Return In Oracle Select Statement

How to call a function with a row type return in an Oracle select statement.

For e.g. :

If I had this function with a rowtype return:
------------------------------
create function abc
return xyz%rowtype
is
rec xyz%rowtype;
begin
select * into rec from xyz where col1 = n;
return rec;
end;
--------------------------------
How could I use this in a select clause, as there is a multi column return by the function ?