使用emacs C代码自动换行符的结构格式

Question

I have recently started using emacs for editing C source, and have been using the auto-newline feature of cc-mode (c-toggle-auto-newline). This works well for constructs like functions and if/else statements, but seems to act strangely when a closing brace should be followed by a semi-colon.

Using auto-newline in GNU Emacs 23.3 I get:

struct foo
{
    int x;
}
    ;

char int[2] =
  {
    0, 1
  }
  ;

I would like to instead get:

struct foo {
    int x;
};

char int[2] = { 0, 1 };

How can I get the closing semi-colon to remain on the same line as the closing brace?

Answer 1

I don't think you can go around this problem with auto newline on. It's not a greatly thought-through feature, it simply inserts newlines after certain characters ( ; , { , etc.). But seriously, how hard is it to press and enter key? Any automation is always error-prone.

Answer 2

You can customize the "cleanup" behavior when auto-newline is turned on. This is controlled by the contents of the c-cleanup-list variable. (View help for this within Emacs by entering Ch v c-cleanup-list .

Specifically, adding defun-close-semi to c-cleanup-list will solve your problem.

If you're already defining a custom style within your ~/.emacs file, then you can probably figure out how to do this. Otherwise, the easiest way to change this setting is via Customize . In the help buffer (displayed when you ran Ch v c-cleanup-list ), the last line will have a link to customize this variable.