Idris 2 for JVM

Idris 2 is a purely functional programming language with first class types. This repository provides Idris 2 compiler targeting JVM bytecode so that Idris 2 compiler and Idris 2 programs can run on the JVM.

Install

• Download the latest Idris 2 JVM release from here https://github.com/mmhelloworld/idris-jvm/releases/latest.
• Extract the archive and add idris2 launcher script directory <EXTRACTED_DIRECTORY_ROOT>/bin to PATH.
• Create an environment variable IDRIS2_PREFIX pointing to <EXTRACTED_DIRECTORY_ROOT>/lib

Example

helloworld.idr

    module Main

    data Tree a = Leaf
                | Node (Tree a) a (Tree a)

    inorder : Tree a -> List a
    inorder Leaf = []
    inorder (Node left a right) = inorder left ++ [a] ++ inorder right

    tree : Tree String
    tree = Node
            (Node
              (Node Leaf "3" Leaf)
              "+"
              (Node Leaf "7" Leaf))
            "/"
            (Node Leaf "2" Leaf)

    main : IO ()
    main = printLn $ inorder tree

Compile

idris2 helloworld.idr -o main

Run

• On Linux/Mac OS: java -cp "build/exec/main_app/main.jar:$IDRIS2_PREFIX/*" main.Main
• On Windows: java -cp "build\exec\main_app\main.jar;%IDRIS2_PREFIX%\*" main.Main

License

This repository extends idris-lang/Idris2 repository with JVM backend. Files from idris-lang/Idris2 are covered by that repository's license.

All other files from this repository are covered by BSD-3-Clause License. See LICENSE.