Install djinn by entering the following commands in the terminal:
sudo apt update sudo apt install djinn
generate Haskell expressions from types
Djinn uses a theorem prover for intuitionistic propositional logic to generate a Haskell expression when given a type. . Given a type the program will deduce an expression of this type, if one exists. If the Djinn says the type is not realizable it is because there is no (total) expression of the given type.