TODO.md

To do items, in no particular order

Process CPP files.

Bring getRichTokenStreamWA over from HaRe (if feasible), and include the CPP / preprocessed comments in the global comment stream in the GHC.ApiAnns, so they are interleaved.

Process LHS files

Should be possible to do something similar to CPP above

Consider splitting both ExactPrint.hs and Utils.hs in two

Break them into an engine part, and a GHC AST specific part. This opens the way to reuse in HSE or similar.

Capture sort order in an independent way

At the moment lists of decls etc are exlicitly sorted according to SrcSpan.

The goal is that a SrcSpan is simply an index from the AST to the annotations, so the delta phase needs to capture this sort order in a way that can be manipulated in transform and used in print.

More mundane things

There are currently warnings for missing pattern matches in both Utils and ExactPrint. Add the missing cases.

Future : 7.10.3 and beyond

https://phabricator.haskell.org/D907 enables the following tests to pass

- Deprecation.hs
- MultiLineWarningPragma.hs
- UnicodeRules.hs

Changes are required in the lexer to allow the following to pass

- UnicodeSyntax.hs
  we have no way of detecting a unicode *