-- $Id: back_prop_opt_fast.xsg,v 1.5 2004/03/31 13:51:15 orlov Exp $ data Char = A | B | C | D data String = NIL | CONS Char String data Int = O | I Int F :: String -> String String F x = x A2B x A2B :: String -> String A2B NIL = NIL A2B CONS A xs = CONS B A2B xs A2B CONS x xs = CONS x A2B xs G :: Int Char -> String String G n y = CONS y CONS y CONS y CONS y CONS y CONS y CONS y CONS y CONS y CONS y NIL CONS B CONS B CONS B CONS B CONS B CONS B CONS B CONS B CONS B CONS B NIL