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beala/gist:a252fcb54970b7968cd4

Last active August 29, 2015 14:07
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Type of arbitrarily nested list
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gistfile1.hs
λ: newtype Fix f = Nest {unFix :: f (Fix f)}
λ: :t Nest []
Nest [] :: Fix []
λ: :t Nest [Nest []]
Nest [Nest []] :: Fix []
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