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Re: how can frame-parameter proxy for make-variable-frame-local?


From: Johan Bockgård
Subject: Re: how can frame-parameter proxy for make-variable-frame-local?
Date: Sat, 29 Mar 2008 11:37:20 +0100
User-agent: Gnus/5.110007 (No Gnus v0.7) Emacs/23.0.60 (gnu/linux)

address@hidden writes:

> Is this correct?  Can you think of a macro that will make this process
> as neat as a simple `setq' (to set) and a simple token (to access)?
> Or am I just fantasizing?

Something like

(require 'cl)

(defmacro with-frame-parameters (vars &rest body)
  (declare (indent 1) (debug ((&rest symbolp) body)))
  `(symbol-macrolet ,(mapcar (lambda (v) `(,v (frame-parameter nil ',v)))
                             vars)
     ,@body))



(macroexpand
 '(with-frame-parameters (foo bar)
    (setq foo 0)
    (setq bar 1)
    foo))
=>
(progn
  (set-frame-parameter nil 'foo 0)
  (set-frame-parameter nil 'bar 1)
  (frame-parameter nil 'foo))

-- 
Johan Bockgård





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