Maksim Zimaliev cryogenian
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| {-#LANGUAGE DeriveFunctor#-} | |
| module Main where | |
| fix :: ((a -> b) -> a -> b) -> a -> b | |
| fix f = f (fix f) | |
| newtype Fix f = In { out :: f (Fix f) } | |
| type Algebra f a = f a -> a |