
On Monday 23 July 2007 16:57:08 Simon Marlow wrote:
Dan Licata wrote:
Simon PJ and I are implementing view patterns, a way of pattern matching against abstract datatypes, in GHC. Our design is described here:
http://hackage.haskell.org/trac/ghc/wiki/ViewPatterns
If you have any comments or suggestions about this design, we'd love to hear them. You can respond to this list (and we can take it to haskell-cafe if the thread gets long) or, if you prefer, directly to me.
At the risk of being a spoil-sport, I have a somewhat negative take on view patterns...
F# already has active patterns and there are OCaml macros implementing views. I have used F#'s active patterns extensively and find them to be extremely useful. I can only assume that they will remain similarly useful in Haskell. -- Dr Jon D Harrop, Flying Frog Consultancy Ltd. OCaml for Scientists http://www.ffconsultancy.com/products/ocaml_for_scientists/?e