Re: strange commenting behaviour (text gets deleted)

[Daniel Nogradi]

> Hi vimmers,
>
> I have a very strange problem and couldn't figure out what's going on.
> I use the following function for commenting out a line or a block of
> lines:
>
>
> function! Komment2(commentLeader, commentTrailer)
>    if match( getline("."), "^\ *$" ) < 0
>        let save_cpo   = &cpoptions
>        let save_paste = &paste
>        set cpo&vim
>        set paste
>        let escCommentLeader = escape(a:commentLeader, '^[.*\~]$')
>        let escCommentTrailer = escape(a:commentTrailer, '^[.*\~]$')
>        if getline(".") =~ '^\s*' . escCommentLeader . '.*' .
> escCommentTrailer . '$'
>            execute "normal ^" . strlen(a:commentLeader) . "x$" .
> strlen(a:commentTrailer)
> . "hl" . strlen(a:commentTrailer) . "x"
>        else
>            execute "normal I" . a:commentLeader . "\<ESC>" . "A" .
> a:commentTrailer . "\<
> ESC>"
>        endif
>        let &cpo   = save_cpo
>        let &paste = save_paste
>    endif
>    echo
> endfunction
>
>
> This function is a modified version of something I found in one of the
> tips or scripts of the vim website. For C I use of course
>
> Komment2('/* ', ' */')
>
> and this works perfectly well, I can select a block of lines, call the
> above function and every line will be commented out. It even works in
> a toggling way, so commented lines will be uncommented. So far so
> good, now comes the strange behaviour.
>
> If there is a line which only contains a { character and that line is
> commented out so it looks like /* { */ and then I call the above
> function to uncomment it, everything below this line will be deleted.
>
> It's probably unrelated

It is very related ...

> but just in case I mention that I have the
> following syntax method set:
>
> syn region myFold start='{' end='}' transparent fold
> set foldmethod=syntax

I just reproduced what happens:

With the (syntax) fold opened, go to the first / of the
comment
   /* { */
Then press "x" (or "3x" as the function does), this will remove the /
and CLOSE THE FOLD (WHY??)

The next "3x" will then remove the whole fold.

While trying this out, I had ft=vim set.  It obviously happens with
filetype C too.  It doesn't happen with some other filetypes.
Currently, I have no idea what's going on ...

Thanks for the explanation, that's indeed what seems to be happening,
but I still couldn't find a good way to circumvent it. How do other
people deal with syntax folding and commenting?