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> Cleaning up some statefull functors

This makes no sense at all. A functor is a type class, it doesn't contain any state.

In Haskell, it makes no sense, agreed.

In C++, it makes sense: http://www.sgi.com/tech/stl/functors.html. Functors are function objects, which is to say they're a class/struct with one method, operator().

If this makes you sigh, know that you're not alone.

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