<a href="http:&#x2F;&#x2F;lambdacube3d.com&#x2F;editor.html" rel="nofollow">http:&#x2F;&#x2F;lambdacube3d.com&#x2F;editor.html</a> why type inference (for hints in editor) is so cool? 
Can I do something similar for haskell (without pain if possible)?