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Programming in Emacs Lisp

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An overview of mark-whole-buffer

In GNU Emacs 20, the code for the complete function looks like this:

(defun mark-whole-buffer ()
  "Put point at beginning and mark at end of buffer."
  (push-mark (point))
  (push-mark (point-max))
  (goto-char (point-min)))

Like all other functions, the mark-whole-buffer function fits into the template for a function definition. The template looks like this:

(defun name-of-function (argument-list)

Here is how the function works: the name of the function is mark-whole-buffer; it is followed by an empty argument list, `()', which means that the function does not require arguments. The documentation comes next.

The next line is an (interactive) expression that tells Emacs that the function will be used interactively. These details are similar to the simplified-beginning-of-buffer function described in the previous section.

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  Copyright 2003   by The Free Software Foundation     Updated Jun 2003