I'm doing an extraction from Coq to Haskell that requires importing a couple of modules on the Haskell end. Is there any Coq extraction feature that allows you to do this automatically? I know I could just write a script to do this but I'd prefer to not reinvent the wheel if necessary.
Can you automatically add Haskell import statements when extracting from Coq?
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There isn't, and it's very sad.
We've solved this problem with a Python script that adds several imports (fiximports.py), but this requires using the Haskell preprocessor (you use it by passing
-F -pgmF fiximports.pytoghc) and results in unused imports warnings, and isn't terribly elegant.I think the issue is that these imports are unnecessary for OCaml extraction, and the feature hasn't been designed and implemented for Haskell extraction.