Re: Proposal: Foldable typeclass: make foldl' and foldr' class methods

On Mon, Jun 20, 2011 at 2:21 PM, Antoine Latter wrote:

On Mon, Jun 20, 2011 at 12:02 PM, Duncan Coutts

...

The only potential breakage is that foldl' and foldr' are exported via Foldable(..) rather than directly. This could affect modules that use explicit imports. (I consider this fact to be a slightly unfortunate quirk of the Haskell module system).

What would the broken code look like?

import Data.Foldable (Foldable(..)) import Data.List now you'd have two definitions of foldl' and foldr' in scope