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Using variable names in a macro
From: |
Narendra Joshi |
Subject: |
Using variable names in a macro |
Date: |
Sat, 09 Dec 2017 21:19:39 +0530 |
Hi,
I want to refactor the following macro. I use it to do things at times
when I am idle for some time and when I come back to the keyboard
eventually. For example, showing bitcoin prices when I have been idle
for some time but removing them from the mode line once I am back as it
takes a lot of space. I think there is a lot of repetition but I am not
sure how to abstract things out into variables. It would have been
simpler if an anonymous function could refer itself.
```
(defmacro do-when-idle (f g interval)
"Call F when idle for INTERVAL seconds and then G when there is activity."
`(progn
(defun ,(intern (concat "do-when-idle-"
(sha1 (format "%s-%s" f g)))) ()
(funcall ,g)
(remove-hook 'post-command-hook
#',(intern (concat "do-when-idle-"
(sha1 (format "%s-%s" f g)))))
(run-with-idle-timer ,interval
nil
(lambda ()
(funcall ,f)
(add-hook 'post-command-hook
#',(intern (concat "do-when-idle-"
(sha1 (format
"%s-%s" f g))))))))
(run-with-idle-timer ,interval
nil
(lambda ()
(funcall ,f)
(add-hook 'post-command-hook
#',(intern (concat "do-when-idle-"
(sha1 (format "%s-%s"
f g)))))))))
```
Best,
--
Narendra Joshi
- Using variable names in a macro,
Narendra Joshi <=