If you're using emacs with a recent haskell-mode and you have the file loaded into a ghci session, then C-c C-t will get you the same information. (C-u C-c C-t

If you're using emacs with a recent haskell-mode and you have the file loaded into a ghci session, then C-c C-t will get you the same information. (C-u C-c C-t will ask ghci and insert the type signature in the line above)