[Haskell] Optimistic Evaluation?

so my question is: what happened to OE? Was it that it seemed like a good idea on paper but not in reality? Or was it too costly to maintain? Or it didn't deliver the goods it promised? I'm just curious. Regards, Lajos Nagy ___ Haskell maili

[Haskell] Or-Patterns

Whatever happened to the idea of Or-Patterns? http://www.haskell.org/pipermail/glasgow-haskell-users/2000-December/001535.html I find them more than occasionally useful :) Is there some theoretical difficulty or is it just that nobody had the time/will to implement it? Regards, Lajos Nagy