Hackett is an actively used programming language created in 2017.

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  • Hackett first appeared in 2017
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Example code from the web:

#lang hackett

(data (Maybe a)
  Nothing
  (Just a))

(def x : Integer
  (let ([y 3]
        [z 7])
    {y + z}))

(class (Show a)
  [show : {a -> String}])

(instance (forall [a] (Show a) => (Show (Maybe a)))
  [show (λ* [[(Just x)] {"(Just " ++ (show x) ++ ")"}]
            [[Nothing ] "Nothing"])])

Last updated July 22nd, 2019