I'm using GHCi version 6.2.1 under Cygwin. I'm trying to implement a compiler that translates a DSL into Haskell; I'd like to build the structure incrementally and then use the pretty printer to output the target code. However, the pretty printer does not always produce valid output; sometimes needed parentheses are lacking, as in: Main> pprDec $ DataD [] "M" [] [NormalC "M" [(NotStrict, AppT (ConT Maybe) (ConT "Int"))]] [] data M = M Maybe Int Related question: I've defined a utility function

pdq decq = runQ decq >>= mapM_ print . map pprDec

so I can pretty-print declarations in code brackets, viz.: Main> pdq [d| data M = M (Maybe Int) |] Is there an easy way to transform the declaration to use the short forms of type names, e.g. "Int" instead of "GHC.Base:Int"? -- Dan.