Emacs注释区域在C模式 [英] Emacs comment-region in C mode

问题描述

  / *这是一个很好的方法来改变C模式的注释区域命令是一个注释，它扩展了* / 
 / *，超过了C中的一行以上。* / 
  

to

  / *这是一个扩展
超过一行在C. * / 
  

？我试过

 （setq comment-multi-line t）
  

但这没有帮助。在Emacs手册中有一个多行评论部分，但是它并没有提到任何东西。

解决方案

由于Emacs 21，有一个名为 'newcomment ，它具有不同的注释样式（参见变量'comment-styles 。此设置接近您想要的：

 （setq comment-style'multi-line）
  

（注意：您应该在 c-mode-hook 中进行设置。

但是，没有一个设置使评论看起来像你想要的。

我看到的最简单的方法是添加这个hack： p>

 （defadvice comment-region-internal（之前co 
覆盖第四个参数为空格
（when（eq major-mode'c-mode）;这里有一些条件
（let（（arg-ad-arg 4）））
（当arg 
（ad-set-arg 4（make-string（length arg） \\））））））
  

comment-style 总是在注释行前加上*（如果不是整个/ *）。

如果没有Emacs 21，我想你可以下载 newcomment.el 。我不知道它在早期版本的Emacs中是否正常工作，但可能值得一提，尽管升级Emacs将是一个更好的解决方案。

我的破解'取消注释区域。一个适当的修复将是更改'comment-padright 。这将需要更多的研究，以免打破其他事情。以上黑客只会在'c-mode （根据您的喜好调整条件）中更改行为。

In GNU Emacs, is there a good way to change the comment-region command in C mode from

/* This is a comment which extends  */
/* over more than one line in C. */

to

/* This is a comment which extends
   over more than one line in C. */

? I have tried

(setq comment-multi-line t)

but this does not help. There is a section on multi-line comments in the Emacs manual, but it does not mention anything.

解决方案

Since Emacs 21, there's been a module named 'newcomment, which has different comment styles (see the variable 'comment-styles. This setting gets close to what you want:

(setq comment-style 'multi-line)

(Note: you should probably make that setting in 'c-mode-hook).

However, none of the settings make the comments look like what you want.

The easiest way I saw to get what you want is to add this hack:

(defadvice comment-region-internal (before comment-region-internal-hack-ccs activate)
  "override 4th argument to be just spaces"
  (when (eq major-mode 'c-mode)  ; some condition here
    (let ((arg (ad-get-arg 4)))
      (when arg
        (ad-set-arg 4 (make-string (length arg) ?\ ))))))

The current settings for comment-style always prefix the comment lines with " * " (if not the whole " /* ").

If you don't have Emacs 21, I suppose you could simply download newcomment.el from the repository. I don't know if it works as-is in earlier versions of Emacs, but it might be worth a shot, though upgrading Emacs would be a better solution.

My hack breaks the 'uncomment-region. A proper fix would be to change 'comment-padright. That would take a little more research so as not to break other things. The above hack only changes behavior in 'c-mode (adjust the condition to your liking).

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