What's needed is a parser that can parse
comments, and tie them to the *right place* in the abstract syntax tree.
Figuring out what a comment is really commenting is probably extremely
hard...
The commenting conventions of Haddock serve this purpose pretty well. And Haddock's parser must hold onto the comments to do its job. Maybe that's a good place to start on a Haskell pretty-printer.
Regards, Frank
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