Heime <[email protected]> writes:
> Looked at the decumentation of defcustom and defvar
>
> (defcustom SYMBOL STANDARD DOC &rest ARGS)
>
> defcustom accepts STANDARD to be an expression, and includes
> keyword declarations such as :initualize
>
> (defvar SYMBOL &optional INITVALUE DOCSTRING)
>
> On the other hand, defvar does not seem to allow INITVALUE to be
> an expression, and keyword declarations are not allowed.
>
> It seems to me that defvar is very restrictive.
>
The definition of ‘defvar’ is complex because it can be used
in several contexts, but it is possible to use an expression
(which *will* be evaluated) in a ‘defvar’ expression.
Simple example:
(defvar my-var (list (quote a)
(char-to-string ?b)
(cons 'c 'd)
emacs-version))
M-: my-var
=> (a "b" (c . d) "30.2")
--
The lyf so short, the craft so long to lerne.
- Geoffrey Chaucer, The Parliament of Birds.
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