3

Given the file alfa.c:

// Lorem ipsum dolor sit amet, apeirian constituam interpretaris no his, soluta salutandi persequeris vel ne, facete impedit contentiones te eam. Ut utamur habemus qualisque usu
#include <stdio.h>
int main() {
  puts("hello world");
}

I would like to format all long comments to get results like this:

// Lorem ipsum dolor sit amet, apeirian constituam interpretaris no his, soluta salutandi
// persequeris vel ne, facete impedit contentiones te eam. Ut utamur habemus qualisque usu
#include <stdio.h>
int main() {
  puts("hello world");
}

I see Vim has an option to format comments, however I did not see any Ex mode commands. Is this possible?

2

Depending on your configuration you can achieve the desired result with:

gq

If you want to use this as a ex command you can use:

normal! gqq

to format the current line.

Aslo, it's worth adding the flags a and c to your 'formatoption' configuration:

set fo+=ac

This will try to preserve the current comment formatting as well as automatically formatting the paragraph.

You may want to have a look at:

  • :h format
  • :h gq
  • :h fo-table
  • :h 'fo'
0

You can set a limit for a line, like 80 columns for a line.

Then you can set a autocommand to split such lines whenever you save the file.

:au BufWrite *.* :%s#^\s\*//.\{78\}#&\r//#g

Put this in your ~/.vimrc.

  • 1
    I like this approach, but I can't get it to work @SibiCoder, Pattern not found: .{80,}. But even if it did it looks like this will take anything above 80 characters and turn it into a comment. This seems problematic. – Tumbler41 Jun 13 '16 at 22:14
  • What problems? Can you explain? I will refine my answer – SibiCoder Jun 14 '16 at 2:38
  • 2
    1st: I think you have one of the magic settings on (or off) for your regex. To make your regex work I get: ^\s*\/\/.\{78\}. 2nd: if you had a line of code that was more than 80 characters, this would take it and turn it into a comment. Edit: I guess you fixed this issue by searching for //. – Tumbler41 Jun 14 '16 at 13:24
  • 2
    3rd: This, of course only takes C-style comments into account. 4th: In the case where you have a REALLY long line (more than 160 characters) you will still end up with lines that are greater than 80. – Tumbler41 Jun 14 '16 at 13:30

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