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Disable auto-comment when editing C/C++ files

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Tip 1361 Previous Tip • Next Tip

Created: October 18, 2006 Complexity: basic Author: Johnny Minimum version: 5.7 Karma: 170/47 Imported from: Tip#1361

Auto-comment is a good idea for Vim, but sometimes you may like to disable it. For c/cpp files, just locate file $VIMRUNTIME\ftplugin\c.vim

Find the line 

setlocal comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,://

change it to 

setlocal comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,f://

Then the // comment will not auto repeat in the next line. The key for this is the "f" flag.

[edit] References

 TO DO 

  • Fix this tip because editing a standard ftplugin is a very bad idea.

The solution consists in either providing a custom autocommand, or even better in overriding this setting in end-user defined c-ftplugin.

[edit] Comments

There is no need to edit the ftplugin file itself. Just define an auto command which gets executed whenever a c/c++ file is opened. Put the following line in your vimrc: 

au FileType c,cpp setlocal comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,f://

Or use: 

setlocal comments-=://
setlocal comments+-f://

This has been annoying me for a while as well: 

:set fo=cql

That takes the ro out of the formatoptions.

a :set fo-=ro (could work, I didn't get it working though)

I saw The following block in the c.vim, right next to the lines mentioned in the original comment. commenting off this one worked perfectly fine. 

" Set 'formatoptions' to break comment lines but not other lines,
" and insert the comment leader when hitting <CR> or using "o".
setlocal fo-=t fo+=croql

changed to 

" Set 'formatoptions' to break comment lines but not other lines,
" and insert the comment leader when hitting <CR> or using "o".
" setlocal fo-=t fo+=croql
Retrieved from "http://vim.wikia.com/wiki/Disable_auto-comment_when_editing_C/C%2B%2B_files"

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