ghc-justdoit: A magic typeclass that just does it

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This plugin allows you to write

{-# OPTIONS_GHC -fplugin GHC.JustDoIt.Plugin #-}
module Test where

import GHC.JustDoIt

foo :: ((a -> r) -> r) -> (a -> ((b -> r) -> r)) -> ((b -> r) -> r)
foo = (…)

without having to write the actual implementation of foo.

See examples/Demo.hs for a few examples of what this plugin can do for you.

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Versions 0.1, 0.1,,
Change log
Dependencies base (>=4.11 && <4.12), ghc (>=8.5), hashable [details]
License MIT
Copyright 2018 Joachim Breitner
Author Joachim Breitner
Category Language
Home page
Source repo head: git clone git://
Uploaded by JoachimBreitner at 2018-02-02T20:13:11Z



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Readme for ghc-justdoit-0.1

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ghc-justdoit: a GHC plugin to write the code for you

This is a prototype of a code synthesis plugin for GHC, which uses LJT proof search to instantiate a type.


{-# OPTIONS_GHC -fplugin=GHC.JustDoIt.Plugin #-}
module Test where

import GHC.JustDoIt

foo :: ((a -> r) -> r) -> (a -> ((b -> r) -> r)) -> ((b -> r) -> r)
foo = (…)

Missing bits

If someone wants to pick it up from here, that’d be great!


Please reports bugs and missing features at the GitHub bugtracker. This is also where you can find the source code.

bSpokeLight was written by Joachim Breitner and is licensed under a permissive MIT license.