Re: Built-in Functions and Special Forms

[Greg Hill]

At 2:38 AM +0100 2/27/03, Pascal Bourguignon wrote:
> I've not found any predicate to distinguish between built-in functions
> and special forms.

In Emacs-21, the documentation is consistent enough that this seems 
to always work.

(defun special-form-p (symbol)
    (string-match "\\.\\.\\.\\|&rest" (documentation symbol)))

--Greg