Re: [Haskell-cafe] Error in array index.

24 Jun 2009

      Hello Jason,

Wednesday, June 24, 2009, 1:55:24 PM, you wrote:
...
array ((0,0),(65535,65535)) [((0,0),*** Exception: Error in array index

...
What do I need to do to debug this?
i think that it may be a bit too large for internal Int indicies:

safeIndex :: Ix i => (i, i) -> Int -> i -> Int
safeIndex (l,u) n i = let i' = unsafeIndex (l,u) i
                      in if (0 <= i') && (i' < n)
                         then i'
                         else error "Error in array index"

-- 
Best regards,
 Bulat                            mailto:Bulat.Ziganshin@gmail.com

Re: [Haskell-cafe] Error in array index.

Bulat Ziganshin