[Haskell-cafe] Where is Show for GHC AST?

Hi, I am trying to modify LiquidHaskell and want to see how source code is represented in AST format. I think I have AST i.e. HsExpr value, but there is no Show instance for that. I noticed that GHC classes implement similar class Outputable, but it doesn't do what I expected. It just reconstruct AST back to source code. I could probably write a TH function generating Show instances for all types which HsExpr depends on, but I hope there is more straight forward way to do that. And after all I curious what is the reason for not having Show for GHC AST types? It would be so convenient having Show. -- Daneel S. Yaitskov Java Developer