[Haskell-cafe] Newbie question: Why gfoldl has this strange type?
Hi! I am a novice in Haskell, and particularly I have interested in generic programming. This interest motivated me to read paper Scrap your boilerplate: A practical design pattern for generic programming, but I didn't understand the type of the function gfoldl, that was present in class Term (Data). Somebody could help me to understand the type of this function? Thanks... Rodrigo ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Newbie question: Why gfoldl has this strange type?
Just so nobody else has to look it up: Data.Generics.Basics.gfoldl :: Data a = (c (a - b) - a - c b) - (g - c g) - a - c a -- ryan On 8/30/07, Rodrigo Geraldo [EMAIL PROTECTED] wrote: Hi! I am a novice in Haskell, and particularly I have interested in generic programming. This interest motivated me to read paper Scrap your boilerplate: A practical design pattern for generic programming, but I didn't understand the type of the function gfoldl, that was present in class Term (Data). Somebody could help me to understand the type of this function? Thanks... Rodrigo ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Newbie question: Why gfoldl has this strange type?
Actually, it's a higher rank type and that doesn't show up on hoogle's main page. gfoldl :: (forall a b . Data a = c (a - b) - a - c b) - (forall g . g - c g) - a - c a ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
