You're replying to a comment by Will.

August 07, 2011, 04:24

No what?

No there's not a way to use functors in Prolog that is comparable to their usage in ML? That would be sad.

No functors aren't equivalent in all three mentioned programming languages, ignoring mutability concerns? Well, maybe Haskell enforces some extra constraints, but there's no reason you couldn't conform if you actually needed the mathematical properties that entails.

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