以编程方式使用前缀参数的emacs lisp调用函数 [英] emacs lisp call function with prefix argument programmatically

问题描述

我想从一些elisp代码调用一个函数，就像我用一个前缀参数交互地调用它一样。具体来说，我想用一个前缀调用grep。

I want to call a function from some elisp code as if I had called it interactively with a prefix argument. Specifically, I want to call grep with a prefix.

最接近它的工作是使用 execute-extended-command ，仍然要求我键入我要调用的一个前缀...

The closest I've gotten to making it work is using execute-extended-command, but that still requires that I type in the command I want to call with a prefix...

;; calls command with a prefix, but I have to type the command to be called...
(global-set-key (kbd "C-c m g")
                (lambda () (interactive)
                  (execute-extended-command t)))

文档说执行扩展命令使用 command-execute 执行从minibuffer读取的命令，但是我无法使其工作：

The documentation says that execute-extended-command uses command-execute to execute the command read from the minibuffer, but I haven't been able to make it work:

;; doesn't call with prefix...
(global-set-key (kbd "C-c m g")
                (lambda () (interactive)
                  (command-execute 'grep t [t] t)))

有没有办法调用一个前缀而非非 -

Is there any way to call a function with a prefix yet non-interactively?

推荐答案

如果我理解你的权利，你正在试图做一个绑定，类似于您键入 Cu Mx grep< ENTER> 。尝试这样：

If I'm understanding you right, you're trying to make a keybinding that will act like you typed C-u M-x grep <ENTER>. Try this:

(global-set-key (kbd "C-c m g")
                (lambda () (interactive)
                  (setq current-prefix-arg '(4)) ; C-u
                  (call-interactively 'grep)))

尽管我可能会为此命名一个函数：

Although I would probably make a named function for this:

(defun grep-with-prefix-arg ()
  (interactive)
  (setq current-prefix-arg '(4)) ; C-u
  (call-interactively 'grep))

(global-set-key (kbd "C-c m g") 'grep-with-prefix-arg)

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