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14 lines
434 B
14 lines
434 B
7 years ago
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# Chapter Excercises
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## Can a valid Functor be written?
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1. No, Bool is of kind `*`
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2. Yes, see src/chptexc.hs
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3. Yes, see src/chptexc.hs
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4. The first f in `outF :: f (Mu f)` implies that f is of kind `* -> *`. `Mu` takes this f to return a type, so it's kind is `(* -> *) -> *`. This means we can't make a Functor from this as this is not `* -> *`
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5. No, D is of kind `*`
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## Rearrange
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see src/chptexc.hs
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## Write
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see src/chptexc.hs
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