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instances for other Integral indexes? #15

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aryairani opened this issue Oct 7, 2021 · 1 comment
Open

instances for other Integral indexes? #15

aryairani opened this issue Oct 7, 2021 · 1 comment

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@aryairani
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aryairani commented Oct 7, 2021 •
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We have some Word64-indexed types, and having to scatter fromIntegral all over to compensate outweighs the convenience of using like ifor_ f xs over for_ f (xs `zip` [0..]) in a smaller number spots.

WDYT about replacing instance FunctorWithIndex Int [] with instance Integral i => FunctorWithIndex i [], and so on?
@phadej
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phadej commented Oct 8, 2021

instance Integral i => FunctorWithIndex i [], won't satisfy functional dependency and wreak havoc the type inference.

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@phadej @aryairani