People have asked for such a thing before, but it'd be quite difficult
to do reliably --- particularly inside function bodies, which aren't
normally parsed at all during a dump/restore. If you're willing to
accept a 95% solution, running the pg_restore output through "sed"
would likely work fairly well. I'd personally want to diff the
before-and-after scripts before applying though :-)
Another 95% solution, if both schemas are on the same server, google for function clone schema, you´ll find some of them. They create tables, functions, sequences, views, ...