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Like all Lisps, Emacs Lisp has macros which you can read about in the manual at your leisure. I reference the manual throughout the guide by HTML link, but you can read it inside your Emacs itself. Run: C-h i m Elisp RET <function body>) (defvar var-name <the value> "Always document your variables.") (let ((x 1) (y
8.5.1 defvar and an asterisk. In the past, Emacs used the defvar special form both for internal variables that you would not expect a user to change and for variables that you do expect a user to change. Although you can still use defvar for user customizable variables, please use defcustom instead, since it provides a path
6. GNU Emacs Lisp Reference Manual. (setq done t))). In this special form, the arguments from and to are optional, but must both be present or both absent. If they are present, inc may optionally be specified as well. These arguments are grouped with the argument var into a list, to distinguish them from body, which includes
The copy-region-as-kill function is written in Emacs Lisp. Two functions within it, kill-append and kill-new , copy a region in a buffer and save it in a variable called the kill-ring . This section describes how the kill-ring variable is created and initialized using the defvar special form. (Again we note that the term kill-ring is a
11.5 Defining Global Variables. A variable definition is a construct that announces your intention to use a symbol as a global variable. It uses the special forms defvar or defconst , which are documented below. A variable definition serves three purposes. First, it informs people who read the code that the symbol is intended
emacs-lisp-style-guide You can generate a PDF or an HTML copy of this guide using Transmuter. Many in the Emacs community use checkdoc with Flycheck. What is the difference between setq and defvar in Emacs lisp? I see common lisp version of the same question at https://stackoverflow.com/questions/3855862.
2 May 2002 You may announce your intention to use a symbol as a global variable with a variable definition: a special form, either defconst or defvar . In Emacs Lisp, definitions serve three purposes. First, they inform people who read the code that certain symbols are intended to be used a certain way (as variables).
The three Lisp modes (Lisp mode, Emacs Lisp mode, and Lisp Interaction mode) have more features than Text mode and the code is correspondingly more complicated. Here are excerpts from `lisp-mode.el' that illustrate how these modes are written. ;; Create mode-specific table variables. (defvar lisp-mode-syntax-table nil
14 Feb 2011 had some exposure to Lisp in the past, this guide will help refresh those memories and shed some new 2.4 Running CL as a subprocess of Emacs . To enable your Emacs to function in the proper manner, place the following expressions in a file named .emacs in your home directory: (setq load-path.
I didn't come up with all the rules out of nowhere; they are mostly based on my extensive career as a professional software engineer, feedback and suggestions from members of the Emacs Lisp community, and various highly regarded Emacs Lisp programming resources, such as "GNU Emacs Lisp Reference Manual".
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