Ok, Thanks. This works fine. I found out that also mapP and sumP are working as expected, but elemP and foldP do not behave correctly. Luca. On Aug 29, 2011, at 11:14 AM, Daniel Fischer wrote:
On Monday 29 August 2011, 08:41:35, Luca Ciciriello wrote:
Hi Alba. Since I've got no answer to my question I think that my strange behavior is a very deep problem.
Well, perhaps it's not very deep, just not enough people on this list are familiar with dph. In such cases, ask on haskell-cafe or #haskell to reach a wider audience.
Anyway, I'm pretty sure it's a bug in dph. If you change your code to avoid elemP:
isElement :: String -> Bool isElement x = x `elemP1` parArr where elemP1 :: Eq a => a -> [:a:] -> Bool elemP1 v ar = lengthP (filterP (== v) ar) /= 0
you get the expected result(s) [but not with HEAD].
I've opened a ticket: http://hackage.haskell.org/trac/ghc/ticket/5438
I let you know when I have news.
Bye.
Luca.
Cheers, Daniel