https://github.com/manzyuk/ariadne-el.git
git clone 'git://github.com/manzyuk/ariadne-el.git'
Ariadne provides a “go-to-definition” functionality for Haskell.
ariadne-el is an Ariadne plugin for Emacs.
ariadne-el depends on bert-el, BERT serialization library for Emacs.
The function ariadne-goto-definition queries the Ariadne server
about the location of the definition of a name at point and jumps to
that location. Bind ariadne-goto-definition to a key, for example
as follows:
(require 'ariadne)
(add-hook 'haskell-mode-hook
(lambda ()
(define-key haskell-mode-map "\C-cd" 'ariadne-goto-definition)))