Thanks Niklas,
in fact this produced a source with comments:
import Language.Haskell.Exts.Annotated
main = do
(ParseOk (mod,comments)) <- parseFileWithComments defaultParseMode "Test.hs"
let pretty = exactPrint mod comments
writeFile "Test_PRETTY.hs" pretty
However:
- The source code produced was incorrect:
class Dir d where
was rewritten as:
class Dir dwhere{
And:
instance Dir Directory where
localDir (Local f) = return f
type URL= String
was rewritten as:
instance Dir Directory where
localDir (Local f) = return f
typeURL= String
Are these known bugs?
- Also, the printing is a bit too exact :-), I would like to keep my
comments AND get the code nicely reformatted.
Is there a way?
What people use to keep their haskell source files in tip-top shape?
Thanks
titto
2009/10/20 Niklas Broberg
Hi Pasqualino,
I am looking at the haskell-src-ext library.
It can parse files with comments and it can pretty print but, for what I can see it cannot do both :-) (prettyPrint won't work on the structure returned by parseFileWithComments).
What you want is exactPrint, defined in Language.Haskell.Exts.Annotated.ExactPrint. :-)
Cheers,
/Niklas