On Monday 23 July 2007, Rene de Visser 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.
I find the => operator excessive.
I want to voice my complete agreement. At least -> is already a binding operator in GHC, with semantics analogous to those being introduced; since when is => a binding operator? Thus far, neither => nor <= has been used for anything of the sort, so it's an entirely new entry in the semantic space --- and => /is/ already a keyword in GHC, which makes it worse. <snip> Jonathan Cast http://sourceforge.net/projects/fid-core http://sourceforge.net/projects/fid-emacs