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November 15, 2017 21:20
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Pure Profunctor Lenses in ES6
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| /** | |
| * Lens types. | |
| * =========== | |
| * | |
| * a * b = {fst: a, snd: b} | |
| * a + b = {index: Boolean, value: a | b} | |
| * | |
| * Iso s t a b = forall (~>) . Profunctor (~>) => (a ~> b) -> (s ~> t) | |
| * Lens s t a b = forall (~>) . Strong (~>) => (a ~> b) -> (s ~> t) | |
| * Prism s t a b = forall (~>) . Choice (~>) => (a ~> b) -> (s ~> t) |