[Haskell-cafe] derive Pretty?

2008-01-31 Thread Greg Fitzgerald 
Is it possible to automatically derive instances of
Prettyhttp://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?

Thanks,
Greg
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Re: [Haskell-cafe] derive Pretty?

2008-01-31 Thread Stefan O'Rear 
On Thu, Jan 31, 2008 at 03:00:15PM -0800, Greg Fitzgerald wrote:
 Is it possible to automatically derive instances of
 Prettyhttp://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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