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{-# LANGUAGE ExplicitForAll, TypeOperators #-}
module Main where
-- Infix type operator
f1 :: forall m a b. (a `m` b) -> ((a `m` b) -> a) -> a
f1 x g = g x
-- Infix type operator.. Commented out because we no longer
-- infix operators to be variables; they are type constructors
-- f2 :: forall a b (-->). (a --> b) -> ((a --> b) -> b) -> b
-- f2 x g = g x
main = do { print (f1 (3,5) fst)
-- ; print (f2 (3,5) snd)
}
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