Same with Emacs if you select the TeX input method: Alt-x set-input-method TeX \pi → π That works for any programming language. I’ve used it occasionally for

Same with Emacs if you select the TeX input method: Alt-x set-input-method TeX \pi → π That works for any programming language. I’ve used it occasionally for my own programs but use plain ASCII if I expect others to work on the code.