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Questions - quantified-constraints

Instance inductivity as constraint

I'm trying to express an idea that given instance (MonadTrans t, MonadX m) => MonadX (t m) it should follow, that any t1 (t2 ... (tn m)) is also MonadX as long as all tx have MonadTrans instance. ...
test-img

Ryba

haskell

typeclass

monad-transformers

quantified-constraints

Votes: 0

Answers: 1

Latest Answer

You get the exact same error with the slightly simpler definition of Foo c m given here: (c m, Monad m, forall t. MonadTrans t => c (t m)) ^^^ don't really ne...
test-img

Daniel Wagner

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