22 Feb
2007
22 Feb
'07
3:44 p.m.
l1 = 2 .*. 3 .*. "abc" .*. (Just 4) .*. HNil
hlistTest = do print $ 2 .*. HNil print $ (hOccursMany l1 :: [Maybe Int]) marc@localhost /pr/haskell/test/HList $
I should have used HCons instead of .*. which is bound to HExtend. (but also to HCons in another module) ... Then it compiles fine. Neverthelesse the message is confusing. Marc