can this be done with a check expression? - Mailing list pgsql-sql

I have a table with 3 columns:

name text
start_id integer
end_id integer

start_id and end_id are ranges which must not overlap but can have gaps
between them. Is it possible to formulate a table check constraint that
can verify that either id does not fall within an existing range at
insert time? IE prevent overlaps during insert?

Thanks,
Wayne