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garyb / purescript-indexed-monad

MIT License
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Add classes for lifting #1

Closed garyb closed 5 years ago

garyb commented 7 years ago

@owickstrom I was going to add these, but I think there's some things to play with here, since you might not want to directly promote i and o while lifting, and instead re-map them to some composite index. Meaning we might need a definition more like this:

class IxMonadTrans t i o j p | i -> j, o -> p where
  ilift ∷ forall m a. IxMonad m ⇒ m i o a → t m j p a

But I also need to get back to work, so will have to experiment more later :smile:

owickstrom commented 7 years ago

Yeah, the remapping sounds like something you'd want. I'll try this ASAP and see if I hit a ceiling.