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emacselisp

What does the `@` mean in elisp?

Quite likely this is a dumb question, but I haven't come across the @ symbol in the bits of elisp I have read, and was wondering what it means (preceded by a , as well) in this code? I have had some difficulty providing the proper search phrase I think.

In case of link rot:

(defmacro zenburn-with-color-variables (&rest body)
  "`let' bind all colors defined in `zenburn-colors-alist' around BODY.
Also bind `class' to ((class color) (min-colors 89))."
  (declare (indent 0))
  `(let ((class '((class color) (min-colors 89)))
         ,@(mapcar (lambda (cons)
                     (list (intern (car cons)) (cdr cons)))
                   zenburn-colors-alist))
     ,@body))
Solution

  • This is an elisp macro definition, it defines a template for code to be substituted by other code at compile time. A decent intro is chapter 7 of Paul Graham's On Lisp

    http://www.paulgraham.com/onlisptext.html