Install elpa-sml-mode by entering the following commands in the terminal:
sudo apt update sudo apt install elpa-sml-mode
Description:
Emacs major mode for editing Standard ML programs
SML-mode provides syntax highlighting and automatic indentation for Standard ML and comes with sml-proc which allows interaction with an inferior SML interactive loop. You will need this if you write Standard ML programs using Emacs. For OCaml prgramming, see instead tuareg-mode.
Homepage: https://elpa.gnu.org/packages/sml-mode.html
Version: 6.8-1
Section: universe/editors