Re: [Haskell-cafe] Lists of Existential DT

jkff wrote:

Or like this, with the benefit of using lists. data DrawableObj a = forall a.Drawable a => DrawableObj a a <,> b = DrawableObj a : b drawMany (a<,>b<,>c<,>[])

I like this solution, but it's a pity I think that Haskell doesn't provide a way to use types like [forall a. (Drawable a) => a], which obligates you to declare an extra datatype... ----- Yves Parès Live long and prosper -- View this message in context: http://old.nabble.com/Lists-of-Existential-DT-tp27735354p27737144.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com.