Andrew Coppin
Woah... Let me sit down and grok that for an hour or two. o_o
The Haskell learning curve - including the wonderful range of useful generic stuff you can do with it - extends way higher than for many other languages, I think, though you can write lots of useful code when you're just partway up. I'm still learning things, and knowing I have much more yet to learn, and normally I can learn most of my way around a new programming language within a couple of weeks. (snip)
What's Uniplate?
http://www-users.cs.york.ac.uk/~ndm/uniplate/ may help to answer that question. I haven't even finished understanding SYB, yet, though; I'm still mystified by how to use Data.Generics.Twins.gzipWithQ. So, I'm not at a stage where I can usefully contrast Uniplate with the Data.Generics stuff. -- Mark