Re: Fwd: [Haskell-cafe] Data.Tree.Zipper in the standard libraries

Hi

Neil, nobody is suggesting to add the zipper to the "base" package, we are talking about the "containers" package, which is also available

I was referring to base as "the set of Core libraries" - my terminology was wrong, but my arguments were written with me thinking "containers", so still apply.

In this case, the zipper is the iterator type for trees, so I think that it is justified to add it to the same package as trees.

Talking to people on IRC today it appears there is a reasonably large design space for a zipper interface. If this is true, then putting a zipper in the containers package without some significant real-world experience is probably premature. Thanks Neil