On Sun, Feb 10, 2013 at 8:51 PM, grant
Michael Snoyman
writes: Hi Michael,
Just one last thought. Does it make any sense that xml-conduit could be rewritten as a lens instead of a cursor? Or leverage the lens package somehow?
That's a really interesting idea, I'd never thought about it before. It's definitely something worth playing around with. However, I think in this case the Cursor is providing a totally different piece of functionality than what lenses would do. The Cursor is really working as a Zipper, allowing you to walk the node tree and do queries about preceding and following siblings and ancestors. Now given that every time I'm on #haskell someone mentions zippers in the context of lens, maybe lens *would* solve this use case as well, but I'm still a lens novice (if that), so I can't really speak on the matter. Maybe someone with more lens experience could provide some insight. Either way, some kind of lens add-on sounds really useful. Michael