> Hi GHC people, >=20 > I would like to add a primitive to GHC 5.00.2 of the form: >=20 > isWHNF :: a -> Bool >=20 > I was able to do (something like) this a while ago in 4.06,=20 > but have got > stuck trying to do the same with 5.00.2. One problem is that you didn't call it 'reallyUnsafeIsWHNF#' :-) (or you could give it an IO type, to follow the current trend). Simon