Re: Question about Haskell AST

22 Feb 2011

      Hi Jane,

On Mon, Feb 21, 2011 at 11:46:16PM -0800, Jane Ren wrote:
...
Did you mean I have to include the dflags like below to get the parsetree of a base library file like libraries/base/GHC/List.lhs
I am stilling getting the same error 
AstWalker: panic! (the 'impossible' happened)
  (GHC version 7.0.1 for x86_64-apple-darwin):
  lexical error at character 'i'
my code is 	"...
        setSessionDynFlags ...
        target <- guessTarget targetFile Nothing
  setTargets [target]
        load LoadAllTargets"
Would you have any other suggestions?
This works for me with the 7.0 branch:

main :: IO ()
main =
    defaultErrorHandler defaultDynFlags $ do
      runGhc (Just libdir) $ do
        dflags <- getSessionDynFlags
        let dflags' = foldl xopt_set dflags 
                            [Opt_Cpp, Opt_ImplicitPrelude, Opt_MagicHash]
        setSessionDynFlags dflags'
        target <- guessTarget fp Nothing
        setTargets [target]
        load LoadAllTargets
        liftIO $ putStrLn "Done"

Let me know if you still have problems.

Thanks
Ian

Re: Question about Haskell AST

Ian Lynagh