Alan & Kim Zimmerman alan.zimm at gmail.com
Sun Oct 3 17:40:35 UTC 2021

Hi all

I am working on a variant of the exact printer which updates the annotation
locations from the `EpaSpan` version to the `EpaDelta` version, as the
printing happens

data EpaLocation = EpaSpan RealSrcSpan
                 | EpaDelta DeltaPos

The function doing the work is this

markAnnKw :: (Monad m, Monoid w)
  => EpAnn a -> (a -> EpaLocation) -> (a -> EpaLocation -> a) ->
AnnKeywordId -> EP w m (EpAnn a)

which gets an annotation, a function to pull a specific location out, and
one to update it.

I do not know much about lenses, but have a feeling that I could simplify
things by using one.

Can anyone give me any pointers?

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.haskell.org/pipermail/ghc-devs/attachments/20211003/ca47b4c7/attachment.html>

More information about the ghc-devs mailing list