emacs错误：键序列M-x g以非前缀键M-x开头 [英] emacs error: Key sequence M-x g starts with non-prefix key M-x

问题描述

我在 .emacs 中具有以下代码：（global-set-key（kbd Mx g）'gnus）以键绑定 Mx g 启动Gnus。我得到：错误：键序列M-x g以非前缀键M-x 开头。如何定义以 M-x 开头的键绑定？这是一件不好的事情，应该避免吗？我觉得它更直观，因为长版是 M-x gnus 。例如，将其定义为 Cc g 没问题，但是您可以使用 Cc g 和例如R来启动Gnus。通过 Mx R 并不是很直观（与通过 Mx + 1个字母

I have the following code in .emacs: (global-set-key (kbd "M-x g") 'gnus) to start Gnus with the keybinding M-x g. I obtain: error: Key sequence M-x g starts with non-prefix key M-x. How can I define keybindings starting with M-x? Is this a bad thing to do and should be avoided? I find it more intuitive since the "long version" is M-x gnus. Defining it as C-c g for example is no problem but then you start Gnus with C-c g and, for example, R via M-x R which is not very intuitive (in contrast to starting both via M-x + 1 letter

推荐答案

键 Mx 已绑定到命令 execute-extended-command ，然后要求您提供要执行的命令的名称（在您的情况下为 gnus ）。

The key M-x is already bound to the command execute-extended-command, which then asks you to provide the name of a command to execute (in you case: gnus).

由于 R 是一个只有一个字符长的命令，因此看起来 Mx R 是一个键序列，但不是： Mx ，然后在迷你缓冲区中输入 R ，您必须按 RET 来验证输入。

Since R is a command only one-character long, it looks like M-x R is a key sequence, but it's not: it's M-x followed by entering R in the minibuffer and you have to hit RET to validate your input.

简而言之：

• 您不能设置以 Mx开头的键序列，因为此键已经绑定到命令，因此不是前缀（不同于 Cc ，后者什么也不做，只等着您t o输入另一个键，但应保留给当前模式专用的绑定。）


• 执行操作的标准方法是继续使用 Mx gnus 或将其重新绑定到完全不同的密钥（如果您需要非常快的话（例如，可以使用 F1 - F12 密钥之一）


• 如果您确实希望具有 Mx +字母绑定，则可以为命令 gnus 定义一个字母的别名，例如：

• you can not set key sequences beginning with M-x since this key is already bound to a command and is thus not a prefix (unlike C-c, which does nothing but wait for you to type another key, but should be reserved for bindings specific to the current modes).
• the standard way to do things would be to continue starting gnus using M-x gnus or to rebind it to an entirely different key if you need to be very quick (you could for example use one of the F1-F12 keys)
• if you really want to have a M-x + letter binding, you can define a one-letter alias to the command gnus, like this:

    (defalias 'g 'gnus)

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