Add completions hook

Author: geraldus

haskell-mode.el

@@ -783,6 +783,11 @@ Minor modes that work well with `haskell-mode':
   (setq haskell-literate nil)
   (add-hook 'before-save-hook 'haskell-mode-before-save-handler nil t)
   (add-hook 'after-save-hook 'haskell-mode-after-save-handler nil t)
+  ;; provide non-interactive completion function
+  (add-hook 'completion-at-point-functions
+            #'haskell-completions-completion-at-point
+            nil
+            t)
   (haskell-indentation-mode))
 
 (defun haskell-fill-paragraph (justify)