I implemented Emacs support to handle exactly this. It also provides several other useful features such as formatting and code navigation. It's available on ME

I implemented Emacs support to handle exactly this. It also provides several other useful features such as formatting and code navigation. It's available on MELPA as gnu-apl-mode, or you can get it here: https://github.com/lokedhs/gnu-apl-mode https://github.com/lokedhs/gnu-apl-mode As poor as this video is (and the last time I posted it I believe I said I was going to make a new one), it does illustrate some of the features: https://www.youtube.com/watch?v=yP4A5CKITnM https://www.youtube.com/watch?v=yP4A5CKITnM