addAnnotationsForPretty properly? #72Description
I'm using ghc-exactprint to modify some source code.
I parse a haskell module using parseModuleFromString and obtain (Anns, ParsedSource)
Then I modify that ParsedSource and obtain a new ParsedSource.
I tried using addAnnotationsForPretty in the following manner:
Right (oldAnns, parsedSrc) -> do
let newSrc = someModificationFunction parsedSrc
let newAnns = addAnnotationsForPretty [] newSrc oldAnns
pure $ exactPrint newSrc newAnns
When I do this, the file is printed without language extensions and formatting is lost (I'm guessing that since the modified annotations don't match with the new ParsedSource, the annotations are being discarded/not being modified as expected by addAnnotationsForPretty.
What is the best way to modify the existing annotations in order for them to match up/make sense/accomodate for the changes in the ParsedSource ?