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Re: problems with flet on last emacs
From: |
Stefan Monnier |
Subject: |
Re: problems with flet on last emacs |
Date: |
Sat, 10 Nov 2012 18:38:53 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) |
> (let ((saved (symbol-function 'foo)))
> (unwind-protect
> (progn
> (fset 'foo #'(lambda ()
> (message "bar!")))
> (meta-foo))
> (fset 'foo saved)))
Same problem as with flet: the redefinition is hard to find, dynamically
scoped, etc...
Better use
(defvar foo-bar nil)
(defadvice foo (around blabla activate)
(if foo-bar (message "bar!") ad-do-it))
and then
...
(let ((foo-bar t))
...)
So C-h f foo RET will tell you about the redefinition and you can
recover the non-redefined behavior with a simple (setq foo-bar nil).
Stefan