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T15743d.hs:10:1: error:
• The kind of ‘T2’ is ill-scoped
Inferred kind: T2 :: forall (d :: k).
forall k (c :: k) (a :: Proxy c) (b :: Proxy d) ->
SimilarKind a b -> *
NB: Specified variables (namely: (d :: k)) always come first
Perhaps try this order instead:
k
(d :: k)
(c :: k)
(a :: Proxy c)
(b :: Proxy d)
(x :: SimilarKind a b)
• In the data type declaration for ‘T2’
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