19 Dec
2011
19 Dec
'11
4:46 p.m.
On 12/17/11 1:37 PM, Daniel Peebles wrote:
I noticed that the ZipList newtype in Control.Applicative has no derived instances at all. We can't show a ZipList, check it for equality, or do anything to it except unpack it or treat it like an Applicative or Functor.
It seems fairly uncontroversial to suggest adding some instances for it, but there are some minor questions to address: the obvious instances to add might be Eq, Ord, Show, Read, and possibly Typeable and/or Data.
+1 btw. -- Live well, ~wren