[Haskell-cafe] derive Pretty?

Stefan O'Rear stefanor at cox.net
Thu Jan 31 20:53:20 EST 2008


On Thu, Jan 31, 2008 at 03:00:15PM -0800, Greg Fitzgerald wrote:
> Is it possible to automatically derive instances of
> Pretty<http://haskell.org/ghc/docs/latest/html/libraries/haskell-src/Language-Haskell-Pretty.html>?
> If no, what do most do when it comes to pretty-printing large data types?

It should be pretty trivial to do with my and ndm's Data.Derive
library.  I'm not sure anymore if it has a prettyprinter; I remember
doing the groundwork and finding it fairly easy.  I *think* I got
distracted trying to write a fast prettyprinter.

Stefan
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