> > From: Neil Mitchell <ndmitch...@gmail.com> > > > While I'm on the topic, I recently wrote a tool that wanted to > > traverse deep data structures as produced by haskell-src-exts. ?I > > wound up with about 50 lines of case expressions and around the time > > my hands were literally beginning to hurt decided that enough was > > enough and I should try a generic approach. ?I heard uniplate was > > pretty easy to use, and was pretty pleased to turn the entire thing > > into a single line. ?It took me a little longer to figure out I needed > > to use universeBi since all the examples were monotyped, but once I > > did it Just Worked. ?Amazing. ?So thanks again! ?And maybe you could > > mention universeBi in the instant introduction? > > Yes, I probably should - I'll try and get to that. Of course, I'd also > happily accept a patch against > http://community.haskell.org/~ndm/darcs/uniplate > > I use Uniplate inside HLint, and it's invaluable - there are a lot of > times when List Comp + universeBi really hits the spot. >
Does Uniplate include an instance for: > instance Uniplate a => Biplate [a] a ? Since lists are a common case, I was surprised that this instance wasn't included. Is there a reason it shouldn't exist? I was importing Data.Generics.Uniplate.Direct FWIW. Thanks, John Lato
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