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.
Synopsis
{-# 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
- The LJT might not be complete, due to insufficient backtracking.
- The implementation is very much unoptimized.
- It returns one solution, but not necessary the “best” one. But what is the “best” one?
- It ignores any recursive type, so it cannot do anything with lists. It would be much more useful if it could do some best-effort thing here as well.
- It ignores linear types, and will likely produce ill-typed expressions for them.
If someone wants to pick it up from here, that’d be great!
Related work
- Djinn and djinn-ghc
- exference
- curryhoward for Scala
- hezarfen for Idris
Contact
Please reports bugs and missing features at the GitHub bugtracker. This is also where you can find the source code.
ghc-justdoit was written by Joachim Breitner and is licensed under a
permissive MIT license.