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{-# LANGUAGE TypeOperators, MultiParamTypeClasses, LiberalTypeSynonyms #-}
-- Test infix type constructors for type synonyms
module ShouldCompile where
infix 9 :-+-:
type (f :-+-: g) t o1 o2 = Either (f t o1 o2) (g t o1 o2)
data Foo a b c = Foo (a,b,c)
type App f = f Int Bool Int
f :: (Foo :-+-: Foo) Bool Int Bool
f = error "urk"
g :: App (Foo :-+-: Foo)
g = error "urk"
-------- classes --------
class (Eq a, Eq b) => a :&: b where
op :: a -> b
h :: (a :&: b) => a -> b
h x = op x
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