Ah, I misunderstood. Yes, it could (in theory), but it can't automatically apply the hints it generates. Upgrading to GHC 6.10 is probably easier :-)
Also throwing away Hugs ... (YHC too ?)
Yes :-( I normally develop in Hugs, for a change I wanted to try GHCi. It's also a project that has loads of pattern matching at a fairly complex level, so the benefits offered by view-patterns and pattern-guards were just too hard to pass up. I'm also using SYB and Uniplate on SYB quite extensively. Now we just need Haskell' to standardise the useful bits (pattern guards, rank-2 types, deriving Data) throw away the junk (n+k, monomorphism restriction) and I can write beautiful programs for all Haskell thingies. Thanks Neil PS. I think I threw away Yhc when I imported Data.Map :-)