使用 haskell / cabal / stack 进行运行时类型检查

Question

In a Haskell project, I am using a dependency which I know contains type error. But that's actually fine as I never call this code.

So I want to enable defer-type-errors but only for that dependent package .

Is there a way to scope that compiler instruction somewhere (stack ? cabal?)

Answer 1

If you really have to you can set ghc options per package in stack.yaml , namely:

ghc-options:
    your_package_name: -fdefer-type-errors

I'm not sure whether it's compatible with ghcjs.

But please be sure to make the users of your package aware, maybe include a disclaimer in the document in big bold fonts .