Emacs and Prolog
emacs, prolog, swi-prolog
Solution
Emacs comes pre-configured to work with Perl rather than Prolog for .pl, because Perl is much more commonplace. Add this to your .emacs to change the configuration permanently:
(add-to-list 'auto-mode-alist '("\\.\\(pl\\|pro\\|lgt\\)" . prolog-mode))
If you just want to do it once for a single file and editing session, `M-x prolog-mode` will do it.
Problem
I downloaded SWI Prolog today but, I am having trouble getting emacs to recognize my prolog files. I am saving my prolog files with the extension `.pl` however, It keeps thinking they are perl files. In my home directory I have my `./.emacs file` and I have my `prolog.el` file. Also at the end of my `./.emacs` file I appended the following: ``` (autoload 'run-prolog "prolog" "Start a Prolog sub-process." t) (autoload 'prolog-mode "prolog" "Major mode for editing Prolog programs." t) (autoload 'mercury-mode "prolog" "Major mode for editing Mercury programs." t) (setq prolog-system 'swi) (setq auto-mode-alist (append '(("\\.pl$" . prolog-mode) ("\\.m$" . mercury-mode)) auto-mode-alist) ``` I am using this sample `.emacs` file: Sample Emacs File Why will emacs not recognize my prolog file? I am not that experienced with emacs, so all help is greatly appreciated!