Chris Kuklewicz wrote:
*MyShow> main Hello" ""World #"[17,18,19]"!" I also think [4,5,6]" and "7" are ""cool""."
The extra double quotes being what I am trying to avoid with MyShow
This is your only special case, a single list of a sigle type that is different from other lists? To avoid undecidable, incoherent and other nasty instances, just do what the Prelude does: class MyShow t where swim :: t -> String swimList :: [t] -> String swimList [] = "[]" swimList xs = '[' : foldr1 (\x -> (swim x ++) . (',' :)) "]" xs instance MyShow Char where swim = (:[]) swimList = id Untested, but you get the idea. It's pure Haskell 98. Heck, it's almost Prelude.Show. It won't scale to more type constructors easily, but you didn't ask for that ability, either ;-) Udo. -- "As far as Clinton supposedly cheating on his wife, what do people think he's going to do? Be president of another country while he's president of ours?" -- Tom R., age 12