Excerpts from JP Moresmau's message of Tue Jun 15 14:43:28 -0400 2010:
Hello, I was wondering if there are instances for Typeable and Data available somewhere for GenericPackageDescription. Automatic deriving fails, probably, if I read the docs right, because some types in there have more than 7 parameters. It would help me to use the cabal file parsing functions and convert the result automatically to JSON for use in Eclipse through Scion. Of course if there isn't I suppose I can write my own instances and maybe share them with who ever is interested.
I'd like to second this request; I've written some code that digs for data in these structures and Typeable and Data instances would help eliminate some of the boilerplate associated with this task. Cheers, Edward