On 2019-03-10, Robert Webb wrote:
> I noticed a change in behaviour when moving from 7.3 to 8.1, when opening a
> line after or before a "// blah" style comment.
>
> With the cursor on the comment line, it used to be that opening a line above
> (with "O") would not insert a comment leader at the start, and same with
> opening a line below (with "o").
>
> Now it does insert a comment leader in both cases.
>
> This is never what I want. If I want to extend a comment I hit "A" to append
> and hit Enter to start the new line. This inserts the comment leader. I feel
> like I'm "in" the comment in this case, as opposed to opening a line "after"
> the comment.
>
> By default, in a C++ file, I have:
>
> :set comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,://
>
> I tried adding a "O" before "://". This prevents the comment leader being
> inserted when opening a line above the comment, but NOT when opening a line
> below.
>
> Is that a bug? There appears no way to stop the behaviour when opening a line
> below the comment.
>
> I believe opening a line above or below a //-style comment shouldn't insert
> the
> comment leader by default. When I do this, my intention is almost always to
> insert code after the comment. I can easily continue the comment instead by
> appending to it instead.
That's the behavior I want, too. That's controlled by the o flag in
'formatoptions', which is not included by default. I noticed some
time ago that several filetype plugins were adding o to
'formatoptions', so I fixed that problem by adding this to my vimrc:
autocmd FileType * setlocal formatoptions-=o
" Override any filetype plugin's attempt
" to set the 'fo' 'o' option.
See
:help fo-table
> Also, how would I easily change "://" to "O://" in my vimrc, without
> re-entering the rest of the setting? I guess I want to substitute part of the
> value.
set comments-=://
set comments+=O://
See
:help add-option-flags
Regards,
Gary
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