On Wed, May 13, 2009 at 7:06 PM, Nico Rolle <[email protected]> wrote: > Hi > > I tried this but it diddn't work in ghci: > > import qualified Data.Map as Map > > test :: Map.Map [Int] [[Int]] -> Bool > test (fromList[((i:is), (j:js))]) = [i] == j > > i get the : "Parse error in pattern > Failed." error.
fromList is an ordinary function. Pattern-matching only works on constructors (unless you use view patterns [see http://hackage.haskell.org/trac/ghc/wiki/ViewPatterns]). --Max _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
