recipe for haskell-emacs

haskell-emacs provides an function interface to haskell.
Every haskell module found in a certain directory will get compiled into an executable with which emacs will communicate and interchange function calls and results.
Wrappers for synchronous and for asynchrounous function calls are provided.

It can be found here: http://github.com/knupfer/haskell-emacs

I'm the author of it. I've tested the recipe according to the descriptions on the melpa repo.
There are a bunch of haskell-dependencies which are necessary, but the user gets notified if they are missing.