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make @deriveFixedPoint fail when recursion happens in contravariant position (so functor/traverse cannot be derived) #63

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pepegar opened this issue Aug 24, 2018 · 0 comments
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pepegar commented Aug 24, 2018

The example that comes to my mind is field: Function1[Recursion, Whatever].

@pepegar pepegar self-assigned this Aug 24, 2018
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