remembering multiple currval() inside a RULE

Hi list,

I need to setup a RULE for INSERTing into a VIEW.
The rule has to insert several times into the same table, and I need to
remember the currval()s for another INSERT.

Are there any variables or some other state that I could abuse to safe the
values?
I already tried to CREATE TEMP TABLE only for inserting the values there, but
that doesn't seem to be allowed inside RULEs.
If there is no other

pseudocode:

CREATE TABLE bar (id_bar SERIAL PRIMARY KEY, bar int);
CREATE TABLE bar_bar (id1_bar int, id2_bar int);
CREATE VIEW
foo
AS
SELECT
bar1.bar AS bar1,
bar2.bar AS bar2
FROM
bar_bar,
bar bar1,
bar bar2
WHERE
bar_bar.id1_bar=bar1.id_bar AND
bar_bar.id2_bar=bar2.id_bar;

CREATE RULE
foo_ins
AS ON INSERT TO
foo
DO INSTEAD (
INSERT INTO bar (bar) VALUES (NEW.bar1);
INSERT INTO bar (bar) VALUES (NEW.bar2);
INSERT INTO bar_bar (id1_bar, id2_bar) VALUES (
currval_of_1st_insert('public.bar_id_bar_seq'::text),
currval_of_2nd_insert('public.bar_id_bar_seq'::text)
)
);

TIA
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