Re: [Haskell-cafe] Is there a way to find out the type inferred for a local function inside another function? :)

Currently what I do is declare a signature for helper, and then if it gets a type error try to figure out how to fix it. It's usually not very hard, but it would be slick to have the signature filled in automatically.

Try ghc-mod on Hackage if you are an Emacs user. If GHC can guess the signature of helper function, haskell-mode with ghc-mod automatically hilights the function. Typing C-cC-t inserts the guessed signature. http://www.mew.org/~kazu/proj/ghc-mod/en/ --Kazu