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-- !!! THIS TEST IS FOR TYPE SYNONYMS AND FACTORISATION IN THEIR PRESENCE.
module Test where
data M a = A | B a (M a)
data L a = N | C a (Syn a)
type Syn b = L b
idL :: L (Syn c) -> L (Syn c)
idL N = N
idL (C x l) = C x (idL l)
idM:: M (L (Syn x)) -> M (L (Syn x))
idM A = A
idM (B x l) = B (idL x) (idM l)
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