Emacs Ninja - Forbidden Emacs Lisp Knowledge: Block Comments

That is so weird.

found on https://news.ycombinator.com/item?id=30317088

It's literally one line to make the same `comment` macro Clojure has. Super convenient.

Interesting! :) [Here is my first two minutes thought](https://postimg.cc/SnfNNfyh). I just refactored your function somewhat :) ;;; test.el --- -*- lexical-binding: t; -*- Don't know if it's useful in practice, but if we had multiline comments, we could add invisible property on those markers to auto-hide them. Interlaced with Emacs Lisp code, it gives a "feel" of literate programming. (defun cursed-elisp-block-comment (beg end) (interactive "r") (save-excursion (let ((start (format "#@%d " (+ (- end beg) 2)))) (goto-char end) (insert "\037") (put-text-property end (1+ end) 'invisible t) (goto-char beg) ;; account for space and terminator (insert start) (put-text-property beg (+ beg (length start)) 'invisible t)))) (defun make-visible (beg end) (interactive "r") (remove-text-properties beg end '(invisible t))) This file is a little demo of the concept, but to actually be useful, there should probably be some routine that automatically marks text paragraphs with invisible markers, since it is a bit labourous to do it by hand for each paragraphs. Surprisingly, indentation engine didn't complain at all, while font-lock of course does not know I am in a comment. (message "hello multiline comments") (provide 'test) ;;; test.el ends here

Took me a few goes to figure out what exactly you're doing. That's kind of cool.

Thanks. It was cool you found "multicomment" :-).