---
name: "djinn"
section: "1"
platform: "linux"
package: "djinn"
version: "2014.9.7-9+b2"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/djinn"
---

# djinn(1)

generate Haskell expressions from types

## NAME

djinn - generate Haskell expressions from types

## SYNOPSIS

**djinn \[*OPTION* ... \] \[*FILE* ... \]**

## DESCRIPTION

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.

## OPTIONS

- \[-\|+\]multi

  Print multiple solutions.

- \[-\|+\]sorted

  Sort solutions.

- \[-\|+\]debug

  Debug mode.

## SEE ALSO

The program provides interactive documentation.

## AUTHOR

**djinn** was written by Lennart Augustsson and Thomas Johnsson.

This manual page was written by Raúl Benencia for the Debian Project.