GHC typecheck API
Németh Boldizsár
nboldi at elte.hu
Thu Nov 30 05:42:24 UTC 2017
Dear GHC developers,
I'm developing a framework for development tools for Haskell. I use the
GHC API to parse and typecheck the source files. I recently started to
work on a quick-fix (automatic program correction) for Haskell source
code (correcting parenthesis problems, like 'putStrLn "xxx" ++ show a'
==> 'putStrLn ("xxx" ++ show a)'). To do that I need to get the typed
syntax tree even if the program contains type or rename errors. I could
only do this by a nasty hack, adding a new TH module finalizer
(tcg_th_modfinalizers) to extract the type checker's state before it
fails. Is there a "correct" way to do this? I would not like this
refactorings to be unusable if the GHC API changes.
By the way, if you know of any similar attempt please let me know.
Sincerely,
Boldizsár Németh
haskelltools.org
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