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{-# LANGUAGE TypeFamilies, GADTSyntax, ExistentialQuantification #-}
-- This is a simple case that exercises the LocalGivenEqs bullet
-- of Note [When does an implication have given equalities?] in GHC.Tc.Solver.Monad
-- If a future change rejects this, that's not the end of the world, but it's nice
-- to be able to infer `f`.
module LocalGivenEqs2 where
type family F a
type family G b
data T where
MkT :: F a ~ G b => a -> b -> T
f (MkT _ _) = True
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