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Re: Why is Elisp a lisp-2?

From: Oleksandr Gavenko
Subject: Re: Why is Elisp a lisp-2?
Date: Mon, 10 Oct 2016 16:31:39 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

On 2016-10-07, Marcin Borkowski wrote:

> One conjecture is that Elisp being lisp-2 enables functions and variables
> with the same name (this is what lisp-2 means, right?), and RMS might have
> found it useful: there are quite a few such pairs in Emacs.

At least each major/minor mode function have corresponding variable:

--8<---------------cut here---------------start------------->8---
(defmacro define-minor-mode (mode doc &optional init-value lighter keymap &rest 
             (make-variable-buffer-local ',mode)))
         (modefun mode)          ;The minor mode function name we're defining.
       ;; The actual function.
       (defun ,modefun (&optional arg ,@extra-args)
           (,@(if setter `(funcall #',setter)
                (list (if (symbolp mode) 'setq 'setf) mode))
            (if (eq arg 'toggle)
                (not ,mode)
              ;; A nil argument also means ON now.
              (> (prefix-numeric-value arg) 0)))
--8<---------------cut here---------------end--------------->8---


I would like also mention plist attached to symbol. It is interesting idea to
carry named metadata with symbol:

--8<---------------cut here---------------start------------->8---
(eq 'byte-compile-no-warnings (get 'with-no-warnings 'byte-compile))

(eq 'byte-compile-no-warnings
    (plist-get (symbol-plist 'with-no-warnings) 'byte-compile))
--8<---------------cut here---------------end--------------->8---


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