Hello emacsen users, Here is a setting to check your Haskell code /on-the-fly/ with 'flymake-mode'. (require 'flymake) ;; flymake for Haskell (defun flymake-Haskell-init () (flymake-simple-make-init-impl 'flymake-create-temp-with-folder-structure nil nil buffer-file-name 'flymake-get-Haskell-cmdline)) (defun flymake-get-Haskell-cmdline (source base-dir) (list "ghc" (list "--make" (concat "-i" base-dir) source))) (push '(".+\\.hs$" flymake-Haskell-init) flymake-allowed-file-name-masks) (push '(".+\\.lhs$" flymake-Haskell-init) flymake-allowed-file-name-masks) (push '("^\\(.*\\):\\([0-9]+\\):\\([0-9]+\\): \\(.*\\)$" 1 2 3 4) flymake-err-line-patterns) The 'flymake-mode' has been developed at http://flymake.sourceforge.net/ Emacs22 has this mode already. dons recommends to me at IRC to write this code into the wiki, however, I don't know where we should put the snippet. You can watch a short demo at the following blog: http://madscientist.jp/~ikegami/diary/20071108.html#p01 I have some complaints though it works: - it's slow (hmm) - error and warning seems not distinguished (we may have to modify 'flymake-err-line-patterns') Any comment is appreciated. Best regards, Ike P.S. I like vi-clone, such as vim, too. ;-)