Hackett - Programming language

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Hackett is an open source programming language created in 2017 by Alexis King.

Source code:

git clone https://github.com/lexi-lambda/hackett

#527on PLDB

7Years Old

WIP implementation of a Haskell-like Lisp in Racket

Hackett website
Hackett is developed on GitHub and has 1,094 stars
Hackett first developed in https://github.com/lexi-lambda/hackett/issues

Example 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"])])