13 lines
256 B
Markdown
13 lines
256 B
Markdown
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## "Non Haskell" Hask's Functors
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A simple basic example is the \\(id\_\\Hask\\) functor.
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It simply cannot be expressed as a couple (`F`,`fmap`) where
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- `F::* -> *`
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- `fmap :: (a -> b) -> (F a) -> (F b)`
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Another example:
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- F(`T`)=`Int`
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- F(`f`)=`\_->0`
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