* Difficult lisp macro question (related to gnus-group.el)
@ 2003-08-18 15:23 Jari Aalto+mail.emacs
2003-08-18 19:35 ` Kai Großjohann
0 siblings, 1 reply; 2+ messages in thread
From: Jari Aalto+mail.emacs @ 2003-08-18 15:23 UTC (permalink / raw)
I noticed that the `gnus-group-quick-select-group' function M-RET in
Group buffer only sets few hooks to nil:
(let (gnus-visual
gnus-score-find-score-files-function
gnus-home-score-file
gnus-apply-kill-hook
gnus-summary-expunge-below)
I'm in a process of making and proposing a patch to allow user to
define what hooks he want to be set to `nil' instead of the hard coded
version. However, I don't seem to be able to solve how to contruct `let'
dynamically from a variable, say `hook-list'. That is:
- Given a defvar hook-list (list of hooks to disable)
- The function definition's let should include all those
hooks defined in `hook-list' locally set to nil.
(let (gnus-visual ;; User given hook 1
... ;; User given hook 2
... ;; ...
)
If this is not clear, Example below hopefully demontrates the
intention. I have a problem figuring out how I make the
`my-let-transform' to contruct that `let' around the BODY which
includes all `list' variables set to nil.
(let ((list '(a
b
c)))
(setq a 1)
(defmacro my-let-transform (list &rest body)
(`
(progn
(,@ body))))
(defun my-test ()
(my-let-transform list
(message "A: %d" a)))
(my-test))
=> The result of `my-test' should show after macroexpand:
(defun my-test ()
(let (a
b
c)
(message "A: %d" a)))
Any ideas?
Jari
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Difficult lisp macro question (related to gnus-group.el)
2003-08-18 15:23 Difficult lisp macro question (related to gnus-group.el) Jari Aalto+mail.emacs
@ 2003-08-18 19:35 ` Kai Großjohann
0 siblings, 0 replies; 2+ messages in thread
From: Kai Großjohann @ 2003-08-18 19:35 UTC (permalink / raw)
letters@hotpop.com (Jari Aalto+mail.emacs) writes:
> (defmacro my-let-transform (list &rest body)
> (`
> (progn
> (,@ body))))
Untested:
(defmacro my-let-transform (list &rest body)
`(let ,list ,@body))
--
Two cafe au lait please, but without milk.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2003-08-18 19:35 ` Kai Großjohann
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