Preprocessor imports Text.Interpol unqualified

[Deewiant]

The preprocessor should import qualified Text.Interpol to avoid conflicts with other (^-^) operators. The following code results in "ambiguous occurrence" errors:

{-# OPTIONS_GHC -F -pgmF interpol #-}

module Bug where

(^-^) :: String -> Int -> String
(^-^) s n = s ++ "hello {n}"

As an aside, I think you should just add the import every time. The strstr "^-^" (prettyPrint m) check in the preprocessor is expensive and isn't even accurate (it matches strings containing "^-^" in addition to uses of the operator). To avoid unused import warnings, you can use the form import qualified Text.Interpol ().

[nh2]

@Deewiant Thanks for your suggestions. The attached code should address all these issues.

@scvalex Would be nice if you could review that once you have time.